Display panel, preparation method thereof and display device

Abstract

The application discloses a display panel, a preparation method thereof and a display device. The display panel comprises a substrate, a light-emitting functional layer arranged on one side of the substrate, the light-emitting functional layer comprising a plurality of light-emitting units, a plurality of functional units arranged on the side of the light-emitting functional layer away from the substrate, the plurality of functional units being arranged at intervals, and the orthographic projections of the plurality of functional units on the substrate respectively overlapping the orthographic projections of the plurality of light-emitting units on the substrate, a photovoltaic functional layer arranged on the side of the light-emitting functional layer away from the substrate and sandwiched between adjacent functional units, and a barrier layer comprising a first barrier portion between the photovoltaic functional layer and the functional units. According to the display panel provided by the first aspect of the application, the photovoltaic functional layer and the plurality of functional units are arranged in the same layer, the plurality of light-emitting units in the light-emitting functional layer are not shielded, the separation is realized through the first barrier portion of the barrier layer, the functions of the functional units and the photovoltaic functional layer can be normally performed, and mutual interference is avoided.

Description

Technical Field

[0001] This application relates to the field of display device technology, specifically to a display panel and its manufacturing method, and a display device. Background Technology

[0002] Existing technologies include attempts to integrate a photovoltaic (PV) layer into an organic light-emitting diode (OLED) display panel to absorb ambient light and convert it into electrical energy for powering the display panel's light output.

[0003] However, the performance of OLED panels with integrated PV technology needs to be improved, specifically because the photovoltaic cell layer interferes with the normal function of the existing film layer. Summary of the Invention

[0004] This application provides a display panel and a display module, in which the photovoltaic functional layer can be smoothly integrated into the display panel without obstructing the normal light output of the display panel or interfering with the normal function of the existing film layer.

[0005] In a first aspect, an embodiment of this application provides a display panel, comprising: a substrate; a light-emitting functional layer disposed on one side of the substrate, the light-emitting functional layer including a plurality of light-emitting units; a plurality of functional units disposed on the side of the light-emitting functional layer away from the substrate, the plurality of functional units being spaced apart from each other, and the orthographic projections of the plurality of functional units on the substrate respectively overlapping the orthographic projections of the plurality of light-emitting units on the substrate; a photovoltaic functional layer disposed on the side of the light-emitting functional layer away from the substrate and sandwiched between adjacent functional units; and a barrier layer including a first barrier portion located between the photovoltaic functional layer and the functional units.

[0006] The display panel provided in the first aspect of this application includes a photovoltaic functional layer and multiple functional units disposed on the same layer. While not blocking the light emitted by the multiple light-emitting units in the light-emitting functional layer, the photovoltaic functional layer and the functional units are separated by a first blocking part of the blocking layer, ensuring that the functions of the functional units and the photovoltaic functional layer can be performed normally and avoiding mutual interference.

[0007] Secondly, according to embodiments of this application, a method for manufacturing a display panel is provided, comprising: Multiple light-emitting units are fabricated on one side of the substrate to form a light-emitting functional layer; A photovoltaic functional layer is prepared on the side of the light-emitting functional layer away from the substrate. The photovoltaic functional layer is formed by enclosing multiple opening structures. The orthographic projection of the multiple opening structures on the substrate overlaps with the orthographic projection of the multiple light-emitting units on the substrate. A first barrier portion is prepared on the side of the photovoltaic functional layer away from the substrate to form a barrier layer, and the first barrier portion is disposed in contact with the sidewall of the opening structure. Multiple functional units are fabricated on the side of the barrier layer away from the substrate, and the functional units are disposed in multiple opening structures.

[0008] Thirdly, according to the embodiments of this application, a display device is provided, including the display panel provided in any first aspect embodiment of this application, or the display panel prepared by the method of preparing the display panel provided in any second aspect embodiment of this application. Attached Figure Description

[0009] The features, advantages, and technical effects of exemplary embodiments of this application will now be described with reference to the accompanying drawings.

[0010] Figure 1 This is a schematic diagram of the planar structure of a display panel provided in the first aspect embodiment of this application; Figure 2 yes Figure 1 A magnified structural diagram of region A in the middle; Figure 3 yes Figure 2 A schematic diagram of a cross-sectional structure along the BB direction; Figure 4 yes Figure 2 Another cross-sectional view along the BB direction; Figure 5 This is a schematic diagram of another display panel structure provided in the first aspect embodiment of this application; Figure 6 yes Figure 5 A magnified structural diagram of region C in the middle; Figure 7 yes Figure 6 A schematic diagram of a cross-sectional structure along the DD direction; Figure 8 yes Figure 6 Another cross-sectional view along the DD direction; Figure 9 yes Figure 6 Another cross-sectional view along the DD direction; Figure 10 yes Figure 2 Another cross-sectional view along the BB direction; Figure 11 yes Figure 2 Another cross-sectional view along the BB direction; Figure 12 yes Figure 2 Another cross-sectional view along the BB direction; Figure 13 This is a schematic flowchart illustrating the manufacturing process of a display panel according to a second aspect embodiment of this application; Figures 14a to 14d This is a schematic diagram of the process steps of a method for manufacturing a display panel according to a second aspect embodiment of this application; Figure 15 This is a schematic flowchart of another method for manufacturing a display panel provided in the second aspect of this application; Figures 16a to 16d This is a schematic diagram of the process steps of another method for manufacturing a display panel provided in the second aspect embodiment of this application; Figure 17 This is a schematic diagram of the overall structure of a display device provided in the third aspect embodiment of this application; in: AA - Display area; NA - Peripheral area; 100-substrate; 200 - Light-emitting functional layer; 20 - Light-emitting unit; 300 - Functional Unit; 400 - Photovoltaic functional layer; 401 - First electrode; 401a - First body portion; 401b - First extension portion; 402 - Second electrode; 402a - Second body portion; 402b - Second extension portion; 403 - First transport layer; 404 - Second transport layer; 405 - Active layer; 40 - Photovoltaic unit; 410 - First photovoltaic device group; 420 - Second photovoltaic device group; 400' - Opening structure; 401c - First opening; 500 - Barrier layer; 501 - First barrier section; 502 - Second barrier section; 503 - Third barrier section; 504 - Fourth barrier section; 505 - First opening; 610 - First common sub-electrode; 620 - Second common sub-electrode; 630 - Third common sub-electrode; 640 - Light-blocking part; 650 - Dam-blocking part; 651 - First dam; 652 - Second dam; 643 - First limiting structure; 644 - Second limiting structure; 700 - Auxiliary electrode; 70 - Auxiliary unit; 800 - Light-shielding layer; 80 - Light-shielding sub-section; 900 - Electrode functional layer; 910 - Functional electrode; 920 - Covering layer; 1000 - Display device; X - First direction; Y - Second direction.

[0011] In the accompanying drawings, the same parts use the same reference numerals. The drawings are not drawn to scale. Detailed Implementation

[0012] The features and exemplary embodiments of various aspects of this application will now be described in detail. Numerous specific details are set forth in the following detailed description to provide a comprehensive understanding of this application. However, it will be apparent to those skilled in the art that this application can be implemented without requiring some of these specific details. The following description of embodiments is merely intended to provide a better understanding of this application by illustrating examples. In the accompanying drawings and the following description, at least some well-known structures and techniques are not shown to avoid unnecessarily obscuring the application; and, for clarity, the dimensions of some structures may be exaggerated. Furthermore, the features, structures, or characteristics described below can be combined in any suitable manner in one or more embodiments.

[0013] The directional terms used in the following description refer to the directions shown in the figures and are not intended to limit the specific structure of the display panel and display module of this application. It should also be noted in the description of this application that, unless otherwise explicitly specified and limited, the terms "installation" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0014] Figure 1 This illustration shows a planar structure of a display panel according to an embodiment of the first aspect of this application. Figure 2 It shows Figure 1 An enlarged structure in region A of the middle. Figure 3 It shows Figure 2 A cross-sectional structure along the BB direction.

[0015] Please see Figures 1 to 3 In a first aspect, embodiments of this application provide a display panel, including a substrate 100, a light-emitting functional layer 200, multiple functional units 300, a photovoltaic functional layer 400, and a barrier layer 500.

[0016] The light-emitting functional layer 200 is disposed on one side of the substrate 100, and the light-emitting functional layer 200 includes a plurality of light-emitting units 20.

[0017] Multiple functional units 300 are disposed on the side of the light-emitting functional layer 200 away from the substrate 100. The multiple functional units 300 are spaced apart from each other, and the orthographic projections of the multiple functional units 300 on the substrate 100 overlap with the orthographic projections of the multiple light-emitting units 20 on the substrate 100.

[0018] The photovoltaic functional layer 400 is disposed on the side of the light-emitting functional layer 200 away from the substrate 100 and sandwiched between adjacent functional units 300.

[0019] The barrier layer 500 includes a first barrier portion 501 located between the photovoltaic functional layer 400 and the functional unit 300.

[0020] The substrate 100 serves as the support structure for the display panel, mainly used to arrange the driving circuit and support the subsequent light-emitting functional layer 200.

[0021] The light-emitting functional layer 200 is mainly used for emitting light and displaying content. The driving circuit in the substrate 100 controls and drives multiple light-emitting units 20 to emit light to achieve image display.

[0022] Functional unit 300 is an adjustment module arranged on the light-emitting side of the display panel for adjusting the light emission effect of the light-emitting functional layer 200. Multiple functional units 300 overlap with multiple light-emitting units 20 by orthographic projection, so as to directly adjust the light emission of the light-emitting unit 20.

[0023] The photovoltaic functional layer 400, which is integrated with the functional unit 300 on the same layer and sandwiched between adjacent functional units 300, not only avoids the light emission of the light-emitting unit 20 by overlapping the orthographic projection of the functional unit 300 and the light-emitting unit 20, but also avoids interfering with the normal light emission of the light-emitting unit 20.

[0024] The photovoltaic functional layer 400 is also sandwiched between adjacent functional units 300. It should be understood that the photovoltaic functional layer 400 also makes full use of the arrangement space of the non-light-emitting area that is offset from the light-emitting unit 20, so as to maximize the arrangement area of ​​the photovoltaic functional layer 400.

[0025] Meanwhile, the first barrier portion 501 of the barrier layer 500 is also located between the functional unit 300 and the photovoltaic functional layer 400, thereby achieving boundary separation between the photovoltaic functional layer 400 and the functional unit 300. At the same time, the photovoltaic functional layer 400 is used to receive ambient light and convert it into electrical energy, while the functional unit 300 is used to adjust the light emission effect of the light-emitting unit 20. This achieves functional separation between the two different functions.

[0026] For example, the functional unit 300 can be a filter unit, which includes filter materials corresponding to light-emitting units 20 of different colors, for further extracting the target color of the light-emitting unit 20 to ensure the purity of the emitted color.

[0027] Optionally, the functional unit 300 includes a concentrating unit, which includes a refractive material with a higher refractive index than the photovoltaic functional layer 400, thereby concentrating light emitted at a large angle through refraction, thereby improving light extraction efficiency and front light emission efficiency.

[0028] Optionally, the functional unit 300 includes a concentrating unit, which includes a refractive material with a lower refractive index than the photovoltaic functional layer 400, thereby concentrating light emitted at a large angle through total internal reflection, thereby improving light extraction efficiency and front light emission efficiency.

[0029] For example, the photovoltaic functional layer 400 is made of organic photovoltaic material (OPV). OPV uses a low-temperature process, which can effectively solve the problem that the fabrication process temperature of photovoltaic devices is too high, which can damage the previously fabricated light-emitting devices.

[0030] For example, the material of the first barrier portion 501 of the barrier layer 500 includes silicon nitride (SiN) with a thickness of 0.2 micrometers to 1 micrometer, which makes the barrier layer 500 have good encapsulation, insulation and separation effects, while the material is transparent and has high light transmittance.

[0031] The display panel provided in the first aspect embodiment of this application includes a photovoltaic functional layer 400 and multiple functional units 300 disposed on the same layer. While not blocking the light emitted by multiple light-emitting units 20 in the light-emitting functional layer 200, the photovoltaic functional layer 400 and the functional units 300 are separated by the first blocking part 501 of the blocking layer 500, ensuring that the functions of the functional units 300 and the photovoltaic functional layer 400 can be performed normally and avoiding mutual interference.

[0032] In related technologies, the functional unit 300 and the light-emitting functional layer 200 also need to be functionally separated, and the film layer separating the two must ensure light transmittance and not affect the light emission efficiency of the light-emitting unit 20.

[0033] Please continue reading. Figure 3 In some embodiments, the barrier layer 500 further includes a second barrier portion 502, which is disposed between the functional unit 300 and the light-emitting functional layer 200. The first barrier portion 501 is bent and connected to the periphery of the second barrier portion 502 and together they enclose a receiving cavity, in which the functional unit 300 is located.

[0034] In these embodiments, the first barrier portion 501 and the second barrier portion 502 form a complete barrier structure and confine the functional unit 300 within the receiving cavity, further separating the functional unit 300 from the photovoltaic functional layer 400. At the same time, the second barrier portion 502 also separates the light-emitting functional layer 200 from the functional unit 300.

[0035] The second barrier 502 is located between the functional unit 300 and the light-emitting functional layer 200. On the one hand, it receives the light emitted from the light-emitting functional layer 200 and conducts it to the functional unit 300. On the other hand, it forms a physical gap between the light-emitting functional layer 200 and the functional unit 300, preventing the material of the functional unit 300 from directly contacting the light-emitting functional layer 200, avoiding chemical corrosion or physical damage to the light-emitting functional layer 200 caused by the material of the functional unit 300, and ensuring that the light-emitting functional layer 200 continuously and stably emits light normally.

[0036] The first barrier 501 is bent and connected to the periphery of the second barrier 502, so that the first barrier 501 and the second barrier 502 form an integrated barrier structure. The barrier structure encloses and forms a receiving cavity for accommodating the functional unit 300. The functional unit 300 is confined inside the receiving cavity, thereby achieving all-round spatial protection of the functional unit 300.

[0037] On the one hand, the first barrier 501 is located between the functional unit 300 and the photovoltaic functional layer 400, providing lateral isolation between the functional unit 300 and the photovoltaic functional layer 400 to prevent material penetration or electrical interference between them, ensuring that the function of the functional unit 300 in adjusting the light visual effect and the photoelectric conversion function of the photovoltaic functional layer 400 are independent and do not interfere with each other. On the other hand, the second barrier 502 further strengthens the longitudinal isolation between the functional unit 300 and the light-emitting functional layer 200, making up for the possible lack of protection at the bottom interface when relying solely on the first barrier 501 for lateral isolation, making the overall barrier structure more complete, fully ensuring reliable isolation between the functional unit 300 and the surrounding film layers, and effectively improving the overall structural stability and device reliability of the display panel integrating the photovoltaic functional layer 400.

[0038] For example, the second barrier portion 502 is silicon nitride (SiN). The second barrier portion 502 can separate the light-emitting functional layer 200 from the functional unit 300 while having a thickness of 0.2 micrometers to 1 micrometer, so as to avoid affecting the proportion of light that can be received within the functional unit 300 and affecting the light transmittance.

[0039] In related technologies, the photovoltaic functional layer 400 and other existing structures located on the side opposite to the substrate 100 also need to be functionally separated, and the film layer separating the two must ensure light transmittance and not affect the light emission efficiency of the light-emitting unit 20.

[0040] Please continue reading. Figure 3 In some embodiments, the barrier layer 500 further includes a third barrier portion 503, which is disposed in contact with the surface of the photovoltaic functional layer 400 away from the substrate 100.

[0041] The third barrier portion 503 includes a first opening 505, the orthographic projection of the first opening 505 on the substrate 100 overlaps with the orthographic projection of the photovoltaic functional layer 400 on the substrate 100.

[0042] In these embodiments, the third barrier portion 503 of the barrier layer 500 further covers the surface of the photovoltaic functional layer 400 away from the substrate 100, further separating the photovoltaic functional layer 400 from the existing film structure. At the same time, the third barrier portion 503 also retains a first opening 505 to facilitate the subsequent extraction of electrical energy from multiple units in the photovoltaic functional layer 400, and to reserve an interface for the interconnection of the electrode structures in the photovoltaic functional layer 400.

[0043] The third barrier portion 503 covers the surface of the photovoltaic functional layer 400 from the side away from the substrate 100, forming a physical isolation between the photovoltaic functional layer 400 and other existing functional film layers on the side away from the substrate 100, preventing material interpenetration or electrical coupling interference caused by direct contact between the photovoltaic functional layer 400 and the film layer above, thereby ensuring that the photoelectric conversion function of the photovoltaic functional layer 400 and the predetermined functions of other functional film layers are independent and do not interfere with each other.

[0044] Meanwhile, the third barrier 503 retains the first opening 505. The orthographic projection of the first opening 505 overlaps with the orthographic projection of the photovoltaic functional layer 400. Thus, the barrier structure reserves the necessary interface channels for the power output of each photovoltaic unit 40 in the photovoltaic functional layer 400 and the interconnection of the electrode structure, ensuring that the power converted by the photovoltaic functional layer 400 can be smoothly transmitted to the outside, and realizing the effective utilization of the photoelectric conversion function.

[0045] The specific distribution of units and the arrangement of lead structures within the photovoltaic functional layer 400 will be further described in the display panels provided in subsequent embodiments of the first aspect of this application.

[0046] For example, the third barrier 503 is connected to the first barrier 501. The first barrier 501, the second barrier 502 and the third barrier 503 together enclose and form a receiving cavity. The functional unit 300 is located in the receiving cavity. The third barrier 503, the first barrier 501 and the second barrier 502 work together to form a more complete enclosing structure, which further strengthens the comprehensive protection of the functional unit 300, so that the barrier layer 500 jointly constructs a three-dimensional isolation barrier for the functional unit 300 in the longitudinal and lateral directions.

[0047] Optionally, the third barrier part 503 is set separately from the first barrier part 501. The two are set independently and play a barrier role at their respective interfaces, which makes the preparation process more flexible.

[0048] For example, the third barrier portion 503 is silicon nitride (SiN) with a thickness of 0.2 micrometers to 1 micrometer. The third barrier portion 503 can separate the photovoltaic functional layer 400 from other existing functional film layers on the side away from the substrate 100, while avoiding affecting the proportion of ambient light that can be received in the photovoltaic unit 40, thus affecting the light transmission rate and photoelectric conversion efficiency.

[0049] Figure 4 It shows Figure 2 Another cross-sectional structure along the BB direction.

[0050] Please see Figure 4 In some embodiments, the third barrier portion 503 is distributed across the entire surface of the photovoltaic unit 40 on the side facing away from the substrate 100.

[0051] In these embodiments, the third barrier portion 503 achieves complete separation between the photovoltaic functional layer 400 and other existing functional film layers on the side away from the substrate 100. While the photovoltaic functional layer 400 can be smoothly transmitted outward through other structures, the third barrier portion 503 does not affect the entry of ambient light into the photovoltaic functional layer 400.

[0052] The third barrier portion 503 makes full-area contact with the surface of the photovoltaic functional layer 400 facing away from the substrate 100, and continuously covers the entire area of ​​the photovoltaic functional layer 400 facing away from the substrate 100. This forms a complete and continuous physical isolation interface between the photovoltaic functional layer 400 and other existing functional film layers above it, eliminating the possibility of direct contact between the photovoltaic functional layer 400 and the film layers above it, avoiding interference phenomena such as material penetration or electrical coupling, and maximizing the independence and stability of the functions of the photovoltaic functional layer 400 and other functional film layers.

[0053] Compared to the third barrier portion 503 with a first opening 505, the third barrier portion 503 distributed across the entire surface transmits the electrical energy converted by the photovoltaic functional layer 400 to the outside through other structures, without the need to open an opening in the barrier layer 500 itself. This further strengthens the sealing integrity of the barrier layer 500 for the photovoltaic functional layer 400, effectively preventing external water, oxygen or other harmful substances from entering the photovoltaic functional layer 400 through the opening area, which helps to extend the service life of the photovoltaic functional layer 400 and improve the overall reliability of the display panel.

[0054] At the same time, the material used in the third barrier section 503, which is distributed across the entire surface, also has excellent light transmittance. This ensures that ambient light can fully pass through the third barrier section 503 into the photovoltaic functional layer 400 without significantly affecting the light transmittance of the photovoltaic functional layer 400. This ensures that the photoelectric conversion efficiency of the photovoltaic functional layer 400 is not affected by the full coverage of the barrier layer 500, thus achieving complete isolation while also taking into account the effective absorption and utilization of ambient light by the photovoltaic functional layer 400.

[0055] Please continue reading. Figure 3 In some embodiments, the photovoltaic functional layer 400 includes a first electrode 401, a first transport layer 403, an active layer 405, a second transport layer 404, and a second electrode 402 stacked along the direction away from the substrate 100, wherein the light transmittance of the second electrode 402 is greater than that of the first electrode 401.

[0056] In these embodiments, the second electrode 402 located on the side away from the substrate 100 in the photovoltaic functional layer 400 has a higher transmittance than the first electrode 401 located on the side close to the substrate 100, ensuring that ambient light enters the active layer 405 of the photovoltaic functional layer 400 from the side away from the substrate 100, and preventing the light emitted by the light-emitting unit 20 from entering the photovoltaic functional layer 400 from the side close to the substrate 100.

[0057] The photovoltaic functional layer 400 is formed by sequentially stacking a first electrode 401, a first transport layer 403, an active layer 405, a second transport layer 404, and a second electrode 402 from the side closest to the substrate 100 to the side away from the substrate 100, thus forming a complete photovoltaic functional structure.

[0058] The active layer 405, as the core functional layer of the photovoltaic functional layer 400, is used to absorb ambient light and convert light energy into electrical energy. The first transmission layer 403 and the second transmission layer 404 are respectively disposed on both sides of the active layer 405, and are used to directionally transmit the photogenerated carriers generated by the active layer 405, guiding holes and electrons to converge towards the corresponding first electrode 401 and second electrode 402, thereby realizing the effective output of electrical energy generated by photoelectric conversion.

[0059] The second electrode 402 located on the side opposite to the substrate 100 has a higher transmittance than the first electrode 401, allowing ambient light to pass through the second electrode 402 from the light-emitting side of the display panel and enter the active layer 405, ensuring that the active layer 405 fully absorbs ambient light, thereby improving the overall photoelectric conversion efficiency of the photovoltaic functional layer 400.

[0060] Meanwhile, the first electrode 401 located on the side closer to the substrate 100 has a relatively low light transmittance, effectively blocking light from the direction closer to the substrate 100. This prevents the light emitted by the light-emitting unit 20 from entering the photovoltaic functional layer 400 from the substrate 100 side, and prevents the light emitted by the light-emitting unit 20 from being absorbed and consumed by the active layer 405, thus preventing a loss of light emission efficiency of the display panel. This enables the photovoltaic functional layer 400 to receive ambient light and effectively avoid the light emitted by the light-emitting unit 20, ensuring that the display function and the photovoltaic function operate in tandem without interfering with each other.

[0061] For example, the first electrode 401 is made of a metal material and is prepared by physical sputtering or vapor deposition, with a thickness of 100 nanometers to 200 nanometers. One or more metal materials such as silver, aluminum, and magnesium can be selected.

[0062] For example, the second electrode 402 is made of a transparent electrode material, including a composite material of indium tin oxide and fullerene, with a thickness of 30 nanometers to 100 nanometers.

[0063] For example, the first transport layer 403, the active layer 405, and the second transport layer 404 are all organic polymer materials, and are formed by whole-surface vapor deposition or by printing followed by drying. The thickness of the first transport layer 403 and the second transport layer 404 is 5 micrometers to 15 micrometers, and the thickness of the active layer 405 is 100 nanometers to 200 nanometers.

[0064] In related technologies, when photovoltaic cells have a large area, they are prone to local failures that can lead to overall failure.

[0065] Figure 5 This illustrates another planar structure of a display panel provided in the first aspect embodiment of this application.

[0066] Please see Figure 1 and Figure 5 In some embodiments, the photovoltaic functional layer 400 includes a plurality of photovoltaic units 40 arranged in an array.

[0067] Along the first direction X, the first electrode 401 of one photovoltaic unit 40 is electrically connected to the second electrode 402 of another adjacent photovoltaic unit 40, or the first electrodes 401 of two adjacent photovoltaic units 40 are electrically connected to each other, and the second electrodes 402 of two adjacent photovoltaic units 40 are electrically connected to each other.

[0068] In these embodiments, the photovoltaic functional layer 400 is divided into multiple arrayed photovoltaic units 40 and interconnected to avoid the failure of some photovoltaic units 40 due to the failure of some film layers, which would affect the normal function of the entire photovoltaic functional layer 400.

[0069] The photovoltaic functional layer 400 is divided into multiple arrayed photovoltaic units 40, so that the photovoltaic functional layer 400 is presented in a distributed manner on the display panel plane, and each photovoltaic unit 40 independently undertakes the photoelectric conversion function of the corresponding area.

[0070] When the first electrode 401 of a photovoltaic unit 40 is electrically connected to the second electrode 402 of an adjacent photovoltaic unit 40 along the first direction X, the adjacent photovoltaic units 40 form a series connection. The series connection causes the voltage generated by each photovoltaic unit 40 to be superimposed in sequence, effectively improving the overall output voltage of the photovoltaic functional layer 400, thereby meeting the power supply voltage requirements of the display panel.

[0071] When the first electrodes 401 of two adjacent photovoltaic units 40 are electrically connected to each other and the second electrodes 402 are electrically connected to each other along the first direction X, a parallel connection is formed between the adjacent photovoltaic units 40. The parallel connection allows the current generated by each photovoltaic unit 40 to converge and superimpose, effectively improving the overall output current of the photovoltaic functional layer 400 and enhancing the overall power supply capacity of the photovoltaic functional layer 400.

[0072] Regardless of whether a series or parallel connection method is used, the design of dividing the photovoltaic functional layer 400 into multiple independent photovoltaic units 40 and connecting them to each other ensures that the partial failure of a single photovoltaic unit 40 will not directly cause the entire photovoltaic functional layer 400 to lose its photoelectric conversion capability. This effectively reduces the impact of local film damage or defects on the overall working performance of the photovoltaic functional layer 400, and improves the stability and reliability of the display panel with integrated photovoltaic functional layer 400 in actual use.

[0073] Please see Figures 2 to 4 In some embodiments, along a first direction X, a first electrode 401 of a photovoltaic unit 40 is electrically connected to a second electrode 402 of an adjacent photovoltaic unit 40 to form a first photovoltaic device group 410. The first electrode 401 includes a first body portion 401a and a first extension portion 401b located at least partially around the photovoltaic unit 40. The second electrode 402 includes a second body portion 402a and a second extension portion 402b located at least partially around the photovoltaic unit 40. The first body portion 401a is electrically connected to the first extension portion 401b, and the second body portion 402a is electrically connected to the second extension portion 402b.

[0074] The second extension portion 402b extends from the surface of at least one of the barrier layer 500, the first transport layer 403, the active layer 405, and the second transport layer 404 away from the substrate 100, and overlaps with the surface of the first extension portion 401b away from the substrate 100.

[0075] In these embodiments, adjacent photovoltaic units 40 are connected in series by overlapping the first extension portion 401b and the second extension portion 402b. The second extension portion 402b extending from the body portion of the second electrode 402 is spaced apart from its own first electrode 401 by at least one of the barrier layer 500, the first transmission layer 403, the active layer 405 and the second transmission layer 404 to avoid short circuits.

[0076] The first electrode 401 and the second electrode 402 extend to the periphery of the photovoltaic unit 40, respectively, with a first extension portion 401b and a second extension portion 402b. Adjacent photovoltaic units 40 are connected to each other through the second extension portion 402b and the first extension portion 401b, so that the second electrode 402 of one photovoltaic unit 40 is electrically connected to the first electrode 401 of the adjacent photovoltaic unit 40, thereby forming a first photovoltaic device group 410 connected in series, so that the output voltage of each photovoltaic unit 40 is superimposed in sequence to meet the power supply requirements of the display panel.

[0077] The second extension portion 402b extends peripherally from the second body portion 402a and extends on the surface of at least one of the barrier layer 500, the first transmission layer 403, the active layer 405, and the second transmission layer 404 on the side away from the substrate 100. The film layer between the second extension portion 402b and the first electrode 401 of the same photovoltaic unit 40 plays an insulating role, effectively preventing short circuits between the second extension portion 402b and the first electrode 401 of the unit, and ensuring the reliability of the internal circuits of each photovoltaic unit 40.

[0078] Please see Figure 3 The second extension portion 402b extends on the surface of the barrier layer 500 away from the substrate 100.

[0079] Please see Figure 4 The second extension portion 402b extends from the surface of the first transmission layer 403 on the side opposite to the substrate 100.

[0080] Optionally, the first transport layer 403 extends and covers one corner of the first electrode 401.

[0081] Optionally, the second extension portion 402b extends on the surface of the active layer 405 away from the substrate 100.

[0082] Optionally, the active layer 405 extends and covers one corner of the first electrode 401.

[0083] Optionally, both the first transport layer 403 and the active layer 405 extend and cover one corner of the first electrode 401.

[0084] Optionally, the second extension portion 402b extends from the surface of the second transmission layer 404 on the side opposite to the substrate 100.

[0085] Optionally, the first transport layer 403, the active layer 405, and the second transport layer 404 extend and cover one corner of the first electrode 401.

[0086] Optionally, both the active layer 405 and the second transport layer 404 extend and cover one corner of the first electrode 401.

[0087] Optionally, the second transport layer 404 extends and covers one corner of the first electrode 401.

[0088] Depending on the different process conditions, the second extension portion 402b can be optionally extended on the surface of the barrier layer 500, the first transport layer 403, the active layer 405, or the second transport layer 404. Correspondingly, one or more of the first transport layer 403, the active layer 405, and the second transport layer 404 can extend to cover a corner of the first electrode 401, so as to flexibly adapt to different film preparation processes, ensuring that adjacent photovoltaic units 40 are reliably connected in series while taking into account the diversity and feasibility of the preparation process.

[0089] Please continue reading. Figure 3 In some embodiments, the second extension portion 402b overlaps with the surface of the second body portion 402a on the side away from the substrate 100, and the barrier layer 500 further includes a fourth barrier portion 504 located on at least part of the periphery of the photovoltaic unit 40, with the second extension portion 402b extending on the surface of the fourth barrier portion 504 on the side away from the substrate 100.

[0090] In these embodiments, the second extension portion 402b and the second body portion 402a are divided into two parts, and the second extension portion 402b contacts the surface of the second body portion 402a away from the substrate 100. The fourth barrier portion 504 is further disposed around the photovoltaic unit 40 on the side of the photovoltaic unit 40 away from the functional unit 300, further separating the photovoltaic unit 40 from other existing functional film layers. At the same time, the second extension portion 402b extending from the second body portion 402a of the second electrode 402 is spaced apart from its own first electrode 401 by the fourth barrier portion 504 to avoid short circuit.

[0091] The second extension portion 402b extends outward from the surface of the second body portion 402a facing away from the substrate 100 and overlaps with it, so that it is at a different height from the second body portion 402a in terms of structural layer, so that the second body portion 402a and the second extension portion 402b of the overall second electrode 402 are divided into two layers, which facilitates the implementation of the manufacturing process.

[0092] The fourth barrier portion 504 is located on at least part of the periphery of the photovoltaic unit 40, and further forms a barrier structure at the lateral boundary of the photovoltaic unit 40. On the one hand, it effectively isolates the photovoltaic unit 40 from adjacent photovoltaic units 40 and other existing functional film layers in the lateral direction, preventing material penetration or unintended electrical connection between adjacent photovoltaic units 40. On the other hand, the second extension portion 402b extends from the surface of the fourth barrier portion 504 on the side away from the substrate 100. The fourth barrier portion 504 is located between the second extension portion 402b and the first electrode 401 of the same photovoltaic unit 40, forming a reliable insulating gap between the two, effectively avoiding short circuit between the second extension portion 402b and the first electrode 401 of the unit, and ensuring the electrical reliability of the series connection path.

[0093] For example, the fourth barrier portion 504 is silicon nitride (SiN) with a thickness of 0.2 micrometers to 1 micrometer. The fourth barrier portion 504 can separate the photovoltaic unit 40 from other adjacent photovoltaic units 40 while avoiding affecting the proportion of ambient light that can be received by the photovoltaic unit 40, thus affecting the light transmission rate and photoelectric conversion efficiency.

[0094] The material used in the fourth barrier section 504 has good insulation and light transmittance. While achieving effective lateral isolation of the photovoltaic unit 40, it does not significantly affect the ability of the photovoltaic unit 40 to receive ambient light from the periphery. This fully ensures the light transmission rate and photoelectric conversion efficiency of the photovoltaic unit 40, and further improves the overall structural reliability and photoelectric performance of the display panel of the integrated photovoltaic functional layer 400.

[0095] Please see Figure 2 In some embodiments, the display panel further includes a first common sub-electrode 610 located on one side of the display panel along the first direction X and a second common sub-electrode 620 located on the other side of the display panel along the first direction X. The first common sub-electrode 610 and the second common sub-electrode 620 extend along the second direction Y, and the first direction X intersects the second direction Y.

[0096] Multiple first photovoltaic device groups 410 are electrically connected to a first common sub-electrode 610 on one side of themselves along the first direction X, and to a second common sub-electrode 620 on the other side of themselves along the first direction X.

[0097] In these embodiments, after multiple first photovoltaic units 40 are connected in series to form a first photovoltaic device group 410, the multiple photovoltaic device groups are connected in series on both sides of the first direction X through a first common electrode and a second common electrode, and then connected in parallel to form the positive and negative electrodes of the photovoltaic functional layer 400, so as to facilitate the extraction of electrical energy from the first common electrode and the second common electrode of the photovoltaic functional layer 400.

[0098] The first common sub-electrode 610 and the second common sub-electrode 620 are respectively arranged along the second direction Y on both sides of the display panel along the first direction X, forming a busbar structure that runs through the width of the display panel.

[0099] Multiple first photovoltaic device groups 410 are arranged in series along the first direction X. The first electrode 401 at the end of each first photovoltaic device group 410 along the first direction X is electrically connected to the first common sub-electrode 610, and the second electrode 402 at the end of each first photovoltaic device group 410 along the other side of the first direction X is electrically connected to the second common sub-electrode 620. Thus, the multiple first photovoltaic device groups 410 converge at the first common sub-electrode 610 and the second common sub-electrode 620 at both ends of the first direction X, forming the positive and negative leads of the overall photovoltaic functional layer 400.

[0100] Each of the first photovoltaic device groups 410 is connected in parallel with the first common sub-electrode 610 and the second common sub-electrode 620. The parallel structure allows the current generated by each device group to be superimposed and converged at the common sub-electrode, effectively improving the overall current output capability of the photovoltaic functional layer 400. At the same time, the first common sub-electrode 610 and the second common sub-electrode 620 serve as a unified power output interface, simplifying the connection path for the photovoltaic functional layer 400 to transmit power to the external circuit, which is conducive to the efficient integration and reliable connection of the photovoltaic functional layer 400 with the overall power supply system of the display panel.

[0101] Please continue reading. Figure 2 In some embodiments, the substrate 100 further includes an array circuit layer, wherein at least one of the first common sub-electrode 610 and the second common sub-electrode 620 is disposed on the same layer as the second electrode 402, or at least one of the first common sub-electrode 610 and the second common sub-electrode 620 is located in the array circuit layer.

[0102] In these embodiments, the first common electrode and the second common electrode are fabricated in the same layer as the second electrode 402, reducing one process step and lowering the fabrication cost; or the first common electrode and the second common electrode are located in the array circuit layer, resulting in lower trace impedance.

[0103] Two alternative arrangements are provided for the first common sub-electrode 610 and the second common sub-electrode 620 to adapt to different process design requirements.

[0104] In the first scheme, at least one of the first common sub-electrode 610 and the second common sub-electrode 620 is arranged in the same layer as the second electrode 402. That is, in the process of preparing the second electrode 402, the corresponding common sub-electrode is simultaneously patterned to form, without the need for a separate dedicated electrode preparation process. This effectively simplifies the overall preparation process, reduces process complexity and production costs, and ensures that the electrical connection between the common sub-electrode and the second electrode 402 is at the same height, which is conducive to the reliable formation of the overlapping structure.

[0105] In the second scheme, at least one of the first common sub-electrode 610 and the second common sub-electrode 620 is located within the array circuit layer of the substrate 100. The common sub-electrode is arranged using the existing metal trace resources in the array circuit layer. The metal film layer in the array circuit layer has better conductivity than that in the photovoltaic functional layer 400. Compared with the same layer scheme, it has lower trace impedance, which can effectively reduce the resistance loss generated by the common sub-electrode when converging the current of multiple first photovoltaic device groups 410, improve the overall power transmission efficiency of the photovoltaic functional layer 400, and thus more fully supply the power converted by the photovoltaic functional layer 400 to the display panel, thereby enhancing the overall energy utilization efficiency of the display panel integrating the photovoltaic functional layer 400.

[0106] Please continue reading. Figure 2 In some embodiments, the display panel has a display area AA and a peripheral area NA surrounding the display area AA. The first common sub-electrode 610 and the second common sub-electrode 620 are located in the peripheral area NA. The display area AA also includes a light-blocking portion 640 located on the side of the photovoltaic functional layer 400 away from the substrate 100. The light-blocking portion 640 is located in the peripheral area NA, and the orthographic projection of the light-blocking portion 640 on the substrate 100 overlaps with the orthographic projection of the first common sub-electrode 610 and the second common sub-electrode 620 on the substrate 100.

[0107] In these embodiments, the first common electrode and the second common electrode are located in the peripheral area NA and are shielded by the light-blocking part 640 to prevent the first common electrode and the second common electrode from generating glare due to reflection of ambient light, which would affect normal use by the user.

[0108] The first common sub-electrode 610 and the second common sub-electrode 620 serve as the power collection and extraction structure of the photovoltaic functional layer 400. They are arranged in the peripheral area NA of the display panel, concentrating the busbars in the non-display area and not occupying the effective light-emitting area of ​​the display area AA. This helps to ensure the display effect and aperture ratio of the display area AA.

[0109] In related technologies, the first common sub-electrode 610 and the second common sub-electrode 620 are usually made of metal materials, and their surfaces have a certain degree of reflectivity to ambient light. If they are not shielded, the reflected glare generated by strong external light shining on the surface of the common sub-electrode may affect the user's normal viewing experience.

[0110] To this end, the light-blocking part 640 is disposed on the side of the photovoltaic functional layer 400 away from the substrate 100, located in the peripheral area NA and overlapping with the first common sub-electrode 610 and the second common sub-electrode 620 in the orthogonal projection direction. It effectively shields the common sub-electrode from the light-emitting side of the display panel, blocking ambient light from directly shining on the surface of the common sub-electrode, thereby suppressing the glare phenomenon caused by ambient light reflection of the common sub-electrode and ensuring the normal user experience in various lighting environments.

[0111] The light-blocking part 640 is arranged in the outer area NA, which does not block the normal light output of the light-emitting unit 20 in the display area AA. While achieving the anti-glare function, it also fully takes into account the overall display performance of the display panel.

[0112] In some embodiments, the light-blocking portion 640 includes a black light-blocking material, or the light-blocking portion 640 includes three light-filtering portions of different colors that are sequentially stacked along the direction away from the substrate.

[0113] In these embodiments, the light-blocking part 640 can be used to block the first common electrode and the second common electrode with a black light-blocking material, or the light-blocking part 640 can be stacked with three light-blocking parts prepared in the same layer as the filter layer material to achieve the same light-blocking effect.

[0114] The light-blocking part 640 offers two optional implementation methods in terms of material and structure, so as to flexibly adapt to different manufacturing process requirements.

[0115] In the first method, the light-blocking part 640 is made of black light-blocking material. The black light-blocking material has a broad-spectrum absorption characteristic for visible light, which can effectively shield the area where the first common sub-electrode 610 and the second common sub-electrode 620 are located, and fully suppress the reflected glare generated after the external ambient light shines on the surface of the common sub-electrode. Moreover, the light-blocking effect of the black light-blocking material is stable and reliable, and the manufacturing process is mature.

[0116] In the second approach, the light-blocking part 640 is formed by stacking three light-filtering parts of different colors sequentially along the direction away from the substrate 100. After the three different colored light-filtering parts are superimposed on each other, each colored light-filtering part absorbs the transmitted light of other colors respectively. The three work together to make the stacked area fully absorb visible light of all wavelengths, thereby achieving a light-blocking effect similar to that of black light-blocking material. At the same time, it allows the light-blocking part 640 and the light-filtering unit of the display area AA to be prepared synchronously in the same process step, without the need to introduce an additional black light-blocking material preparation process, effectively reducing the complexity and cost of the overall manufacturing process.

[0117] Optionally, the three stacked filter elements with different colors are prepared using a halftone mask process to reduce the thickness of the filter elements and avoid the problem of excessive film thickness caused by the stacking of three filter elements.

[0118] The three color filters are fabricated using a halftone mask process. By controlling the curing degree of each filter, their thickness is adjusted, making the thickness of each filter layer relatively lower than that of conventional processes. This effectively controls the overall film thickness after the three filter layers are stacked, avoiding the problem of excessive film thickness caused by multiple layers. This helps to maintain the flatness and process consistency of the overall film structure of the display panel.

[0119] Figure 6 It shows Figure 5 An enlarged structure in the C region, Figure 7 It shows Figure 6 A cross-sectional structure along the D-D direction. Figure 8 It shows Figure 6 Another cross-sectional structure along the D-D direction. Figure 9 It shows Figure 6 Another cross-sectional structure along the D-D direction.

[0120] Please see Figures 5 to 9 In some embodiments, along the first direction X, the first electrodes 401 of two adjacent photovoltaic units 40 are electrically connected to each other, and the second electrodes 402 of two adjacent photovoltaic units 40 are electrically connected to each other to form a second photovoltaic device group 420.

[0121] Within a second photovoltaic device group 420, a first electrode 401 and a second electrode 402 are continuously distributed, with the second electrode 402 extending from the surface of at least one of the barrier layer 500, the first transport layer 403, the active layer 405, and the second transport layer 404 on the side away from the substrate 100.

[0122] In these embodiments, within a second photovoltaic device group 420, two adjacent photovoltaic units 40 are connected in parallel, and the first electrode 401 and the second electrode 402 are spaced apart by at least one of the barrier layer 500, the first transmission layer 403, the active layer 405 and the second transmission layer 404.

[0123] Two adjacent photovoltaic units 40 are connected to each other through their respective first electrodes 401 and second electrodes 402 to form a second photovoltaic device group 420 connected in parallel. The parallel connection allows the current generated by the two photovoltaic units 40 to converge and superimpose at their respective positive and negative electrodes, effectively improving the overall current output capability of the second photovoltaic device group 420. At the same time, the parallel structure makes the local performance fluctuation of a single photovoltaic unit 40 have a smaller impact on the output of the overall device group, thus improving the stability of the operation of the photovoltaic functional layer 400.

[0124] Within a second photovoltaic device group 420, the first electrode 401 and the second electrode 402 are continuously distributed. On the one hand, this simplifies the electrical connection path between adjacent photovoltaic units 40 and reduces the complexity of the connection structure fabrication. On the other hand, the continuously distributed electrode structure makes the current conduction path between adjacent photovoltaic units 40 shorter and the contact resistance smaller, which helps to reduce losses during parallel transmission and improve power transmission efficiency.

[0125] For example, a third common sub-electrode 630 connected to multiple first electrodes 401 and second electrodes 402 is also included on one side of the multiple second photovoltaic device groups 420, so as to realize the multiple second photovoltaic device groups 420 in series.

[0126] For example, the third common sub-electrode 630 is disposed on the same layer as the second electrode 402, or the third common sub-electrode 630 is located on the array circuit layer.

[0127] Optionally, the third common sub-electrode 630 is located in the peripheral region NA and is shielded from light by the light-blocking part 640.

[0128] Optionally, the light-blocking part 640 includes a black light-blocking material, or the light-blocking part 640 includes three light-filtering parts of different colors that are stacked sequentially in the direction away from the substrate.

[0129] The beneficial effects of the third common sub-electrode 630 and the light-blocking portion 640 are consistent with those described in the embodiments of the first common sub-electrode 610 and the second common sub-electrode 620, and will not be repeated here.

[0130] Please see Figure 7 and 8 For example, the second electrode 402 extends on the surface of the barrier layer 500 on the side opposite to the substrate 100.

[0131] Please see Figure 9 For example, the second electrode 402 extends from the surface of the first transmission layer 403 on the side away from the substrate 100, and the first transmission layer 403 is continuously distributed between two adjacent photovoltaic units 40.

[0132] Optionally, the second electrode 402 extends on the surface of the active layer 405 opposite to the substrate 100.

[0133] Optionally, the first transport layer 403 and the active layer 405 are continuously distributed between two adjacent photovoltaic units 40.

[0134] Optionally, the active layer 405 is continuously distributed between two adjacent photovoltaic units 40.

[0135] Optionally, the second electrode 402 extends from the surface of the second transmission layer 404 on the side opposite to the substrate 100.

[0136] Optionally, the first transport layer 403, the active layer 405, and the second transport layer 404 are continuously distributed between two adjacent photovoltaic units 40.

[0137] Optionally, the active layer 405 and the second transport layer 404 are continuously distributed between two adjacent photovoltaic units 40.

[0138] Optionally, the second transmission layer 404 is continuously distributed between two adjacent photovoltaic units 40.

[0139] The second electrode 402 extends from the surface of at least one of the barrier layer 500, the first transport layer 403, the active layer 405, and the second transport layer 404 on the side away from the substrate 100. The film layer between the extended area of ​​the second electrode 402 and the first electrode 401 plays an insulating role, effectively preventing the extended part of the second electrode 402 from short-circuiting with the first electrode 401 on the same side, ensuring the electrical reliability of the parallel connection path, and allowing for flexible selection of the appropriate film layer as the insulating spacer structure according to the actual manufacturing process conditions, thus taking into account both structural reliability and process adaptability.

[0140] Please see Figure 7 and Figure 8 In some embodiments, the second electrode 402 includes a second body portion 402a and a second extension portion 402b located at least partially around the photovoltaic unit 40.

[0141] Within a second photovoltaic device group 420, two adjacent second body portions 402a are electrically connected via a second extension portion 402b. The barrier layer 500 also includes a fourth barrier portion 504 located on at least part of the periphery of the photovoltaic unit 40. The second extension portion 402b extends on the surface of the fourth barrier portion 504 on the side opposite to the substrate 100.

[0142] In these embodiments, the fourth barrier portion 504 is further disposed around the photovoltaic unit 40 on the side of the photovoltaic unit 40 away from the functional unit 300, further separating the photovoltaic unit 40 from other existing functional film layers. At the same time, the second extension portion 402b extending from the second body portion 402a of the second electrode 402 is spaced apart from the first electrode 401 by the fourth barrier portion 504 to avoid short circuit.

[0143] The second electrode 402 extends from the second body portion 402a located above the effective area of ​​the photovoltaic unit 40 to the periphery, and the second extension portion 402b serves as an electrical connection bridge between adjacent photovoltaic units 40. Within a second photovoltaic device group 420, it connects the second body portions 402a of two adjacent photovoltaic units 40 to each other, thereby realizing the parallel electrical connection between the second electrodes 402 of adjacent photovoltaic units 40. This allows the current generated by the two photovoltaic units 40 to converge and superimpose on the second electrode 402 side, thereby improving the overall current output capability of the second photovoltaic device group 420.

[0144] The fourth barrier portion 504 is located on at least part of the periphery of the photovoltaic unit 40, and further forms a barrier structure at the lateral boundary of the photovoltaic unit 40. On the one hand, it effectively isolates adjacent photovoltaic units 40 from each other and from other existing functional film layers, preventing material penetration or unintended electrical connection between adjacent structures. On the other hand, the second extension portion 402b extends from the surface of the fourth barrier portion 504 away from the substrate 100. The fourth barrier portion 504 is located between the second extension portion 402b and the first electrode 401 of the same photovoltaic unit 40, forming a reliable insulating gap between the two. This effectively avoids short circuits between the second extension portion 402b and the first electrode 401 of the unit, ensuring the electrical reliability of the parallel connection path, and thus ensuring that the second photovoltaic device group 420 outputs the electrical energy generated by photoelectric conversion stably and efficiently.

[0145] Please see Figure 7 In some embodiments, the second extension portion 402b overlaps with the surface of the second body portion 402a on the side opposite to the substrate 100.

[0146] In these embodiments, the second body portion 402a and the second extension portion 402b are divided into two layers and are connected by overlapping each other.

[0147] The second extension portion 402b is not integrally formed with the second body portion 402a in the same manufacturing step, but is a separately manufactured conductive layer that covers and overlaps the surface of the second body portion 402a on the side away from the substrate 100.

[0148] The layered overlapping structure of the second body part 402a and the second extension part 402b decouples the manufacturing processes of the second body part 402a and the second extension part 402b. The appropriate manufacturing methods and material systems can be selected according to the process conditions and functional requirements of their respective locations, resulting in greater process flexibility.

[0149] The second extension portion 402b covers the surface of the second body portion 402a and extends towards the second body portion 402a of the adjacent photovoltaic unit 40, forming a continuous conductive bridging path between two adjacent second body portions 402a, thereby realizing a reliable parallel electrical connection of the second electrodes 402 of adjacent photovoltaic units 40 within a second photovoltaic device group 420, ensuring smooth current convergence and transmission.

[0150] For example, the second body portion 402a and the second extension portion 402b are made of the same transparent conductive material.

[0151] In embodiments where the second body portion 402a and the second extension portion 402b are made of the same transparent conductive material, the material properties at the interface between the two are consistent, resulting in low contact resistance. This helps to reduce ohmic current loss in the overlapping area, while the process steps are relatively simple and easy to control.

[0152] Optionally, the second body portion 402a and the second extension portion 402b may be made of different transparent conductive materials.

[0153] In embodiments where the second body portion 402a and the second extension portion 402b are made of different transparent conductive materials, the material selection can be optimized according to their respective functional positioning. For example, the second body portion 402a focuses on photoelectric conversion efficiency and selects a high light transmittance material, while the second extension portion 402b focuses on conductive transmission performance and selects a low sheet resistance material. The two work together to further reduce the overall conductive loss of the electrode while taking into account the light transmittance of the photovoltaic unit 40, thereby improving the overall photoelectric conversion efficiency of the photovoltaic functional layer 400.

[0154] Please see Figure 8 In some embodiments, the second extension portion 402b is disposed on the same layer as the second body portion 402a.

[0155] In these embodiments, the second body portion 402a and the second extension portion 402b are prepared in one layer, reducing one process step, further reducing the number of process preparation steps, and improving preparation efficiency.

[0156] The second extension portion 402b and the second body portion 402a are integrally formed in the same manufacturing process. They are at the same film height and together constitute a continuous and complete second electrode 402 structure.

[0157] Compared to the implementation where the second extension portion 402b and the second body portion 402a are layered and overlapped, the scheme where they are set in the same layer does not require a separate deposition and patterning process to form the second extension portion 402b after the second body portion 402a is prepared. This effectively reduces the number of process steps in the overall preparation process, shortens the preparation cycle, reduces process complexity and production costs, and helps to improve the overall preparation efficiency and yield of the display panel.

[0158] Meanwhile, since the second extension portion 402b and the second body portion 402a are continuously film-formed and patterned in the same process, there is no interfacial contact resistance introduced by the layering and overlapping between the two. The process of current flowing from the second body portion 402a into the second extension portion 402b is smoother, which helps to further reduce the overall loss of the second electrode 402 and improve the power transmission efficiency of the parallel connection path of the photovoltaic unit 40.

[0159] Furthermore, the connection between the integrally formed second extension portion 402b and the second body portion 402a is more reliable, eliminating the risk of poor contact due to insufficient adhesion at the layered overlap interface or process errors. This helps ensure the long-term stability of the parallel connection between the second electrodes 402 of adjacent photovoltaic units 40 within the second photovoltaic device group 420, thereby improving the overall reliability and durability of the display panel of the integrated photovoltaic functional layer 400 in actual use.

[0160] Figure 10 It shows Figure 2 Another cross-sectional structure along the BB direction.

[0161] Please see Figure 10 In some embodiments, the display panel further includes an auxiliary electrode 700, which is electrically connected to the second electrode 402.

[0162] In these embodiments, the auxiliary electrode 700 is able to further reduce the impedance of the second electrode 402.

[0163] The second electrode 402 serves as the electrode closest to the light-emitting side of the photovoltaic functional layer 400. To ensure that ambient light can fully pass through the second electrode 402 into the active layer 405, the second electrode is typically made of a transparent conductive material.

[0164] However, in related technologies, transparent conductive materials generally have higher sheet resistance than metal materials. When the photovoltaic functional layer 400 covers a large area, the higher electrode impedance will cause significant losses when the photogenerated current is conducted in the second electrode 402, thereby reducing the overall power output efficiency of the photovoltaic functional layer 400.

[0165] The auxiliary electrode 700 is electrically connected to the second electrode 402. By introducing an auxiliary conductive structure with better conductivity on the basis of the second electrode 402, a low-impedance parallel conduction path is provided for the photogenerated current, so that the current can be quickly converged and transmitted outward through the auxiliary electrode 700. This effectively reduces the overall equivalent impedance of the second electrode 402 and reduces the resistance loss of the current during conduction, thereby improving the power output efficiency of the photovoltaic functional layer 400. It also alleviates the potential difference caused by the high impedance of the second electrode 402 between the edge and center areas of the large-area photovoltaic functional layer 400, and improves the uniformity of the working state of the photovoltaic units 40 in each area.

[0166] In addition, the introduction of the auxiliary electrode 700 can improve the overall conductivity without changing the light transmittance of the second electrode 402 material, avoiding the problem of reduced light transmittance caused by increasing the thickness of the second electrode 402 to reduce resistance. Thus, while taking into account the light transmittance and photoelectric conversion efficiency of the photovoltaic functional layer 400, it improves the overall energy conversion and power supply capability of the display panel with integrated photovoltaic functional layer 400.

[0167] For example, the auxiliary electrode 700 is a semi-transparent conductive material with a thickness of 5 to 10 nanometers, and may be one or more of silver or aluminum metals.

[0168] Please continue reading. Figure 10 In some embodiments, the auxiliary electrode 700 is disposed in contact with at least a portion of the surface of the second electrode 402 on the side away from the substrate 100, and the light transmittance of the auxiliary electrode 700 is greater than that of the first electrode 401.

[0169] In these embodiments, the second electrode 402 is on the side away from the substrate 100, and the transmittance of the auxiliary electrode 700 is greater than that of the first electrode 401, ensuring that ambient light enters the active layer 405 of the photovoltaic functional layer 400 from the side away from the substrate 100, and preventing the light emitted by the light-emitting unit 20 from entering the photovoltaic functional layer 400 from the side close to the substrate 100.

[0170] When the auxiliary electrode 700 overlaps the surface of the second electrode 402 on the side away from the substrate 100, and is positioned above the second electrode 402 in the vertical dimension, that is, when the auxiliary electrode 700 is located closer to the light-emitting side in the photovoltaic functional layer 400, the light transmittance of the auxiliary electrode 700 is greater than that of the first electrode 401. This ensures that while the auxiliary electrode 700 is located on the side of the photovoltaic functional layer 400 away from the substrate 100, it does not significantly block ambient light from entering the second electrode 402 from the light-emitting side and penetrating to the active layer 405. This fully guarantees the light transmittance of the photovoltaic functional layer 400 and ensures the efficient absorption and photoelectric conversion of ambient light by the active layer 405.

[0171] Meanwhile, the auxiliary electrode 700 is designed to have a higher transmittance than the first electrode 401, forming an asymmetric light transmission structure in the photovoltaic functional layer 400 with high transmittance on the light-emitting side and low transmittance on the substrate 100 side. On the one hand, this ensures that ambient light can fully enter the active layer 405 from the side away from the substrate 100. On the other hand, it ensures that the first electrode 401 effectively blocks the light emitted from the light-emitting unit 20 from the direction close to the substrate 100, preventing the light emitted from the light-emitting unit 20 from entering the photovoltaic functional layer 400 and being absorbed and consumed by the active layer 405. While realizing the resistance reduction function of the auxiliary electrode 700, it further enhances the directional reception of ambient light and the effective avoidance of the light emitted from the light-emitting unit 20 in the photovoltaic functional layer 400.

[0172] For example, the auxiliary electrode 700 is disposed in contact with a portion of the second electrode 402 on the side of the substrate 100 away from the substrate.

[0173] Optionally, the auxiliary electrode 700 is disposed in contact with a portion of the second electrode 402 on the surface near the substrate 100.

[0174] Please continue reading. Figure 10 In some embodiments, the auxiliary electrode 700 includes a plurality of auxiliary units 70, the orthographic projections of the plurality of auxiliary units 70 on the substrate 100 overlapping with the orthographic projections of the plurality of photovoltaic units 40 on the substrate 100.

[0175] In these embodiments, the auxiliary electrode 700 is divided into multiple auxiliary units 70, which reduce the impedance of the multiple photovoltaic units 40.

[0176] The auxiliary electrode 700 is divided into multiple auxiliary units 70 corresponding to each photovoltaic unit 40. Each auxiliary unit 70 overlaps with the corresponding photovoltaic unit 40 in the orthographic projection direction, so that each auxiliary unit 70 can cover the second electrode 402 area of ​​its corresponding photovoltaic unit 40 nearby. A low-impedance parallel conductive path is directly formed in the local area of ​​the second electrode 402 of each photovoltaic unit 40, which effectively reduces the equivalent sheet resistance of the second electrode 402 of each photovoltaic unit 40, reduces the ohmic loss when the photogenerated current is conducted inside each photovoltaic unit 40, and avoids unnecessary electrical coupling introduced by the cross-regional connection of the entire auxiliary electrode 700, so that the electrical performance of each photovoltaic unit 40 is independently controllable.

[0177] In some embodiments, the auxiliary unit 70 is a grid wiring structure or a parallel wiring structure, and the orthographic projection of the auxiliary unit 70 on the substrate 100 is at least partially offset from the orthographic projection of the light-emitting unit 20 on the substrate 100.

[0178] In these embodiments, the auxiliary unit 70 is staggered from the light-emitting unit 20, so as not to affect the light output.

[0179] The auxiliary unit 70 adopts a grid wiring structure or a parallel wiring structure. Compared with the planar conductive layer that covers the entire surface, the wiring structure retains a large number of hollow space intervals between adjacent lines, allowing ambient light to pass through the auxiliary electrode 700 and enter the second electrode 402 and the active layer 405 below through the hollow areas. While achieving the auxiliary conductivity and resistance reduction function, it effectively avoids the auxiliary unit 70 from significantly blocking the light transmittance of the photovoltaic functional layer 400, ensuring the photovoltaic unit 40's efficient absorption and photoelectric conversion of ambient light.

[0180] Among them, the grid wiring structure distributes conductive paths evenly in two dimensions through crisscrossing wiring, so that current in all directions in the plane can be drawn into the wiring of the auxiliary unit 70 nearby, further reducing the current conduction path length and equivalent impedance in the plane of the second electrode 402, and improving the current convergence uniformity of the large-area photovoltaic functional layer 400; the parallel wiring structure provides conductive paths in a relatively simple one-dimensional arrangement, with a relatively simple fabrication process and stronger process adaptability.

[0181] The auxiliary unit 70 is at least partially offset from the orthogonal projection of the light-emitting unit 20 on the substrate 100, so that the semi-transparent traces of the auxiliary unit 70 avoid the light-emitting area of ​​the light-emitting unit 20 as much as possible. This avoids the traces of the auxiliary electrode 700 from blocking the light emitted from the front of the light-emitting unit 20, ensuring that the light emission efficiency and display brightness of the display panel are not affected by the auxiliary electrode 700. While realizing the resistance reduction function of the auxiliary unit 70 and ensuring the light intake rate of the photovoltaic functional layer 400, the normal display performance of the display panel is also taken into account.

[0182] For example, the width of the semi-transparent trace of the auxiliary unit 70 is 3 to 6 micrometers.

[0183] Please see Figure 3 In some embodiments, the display panel further includes a light-shielding layer 800 disposed between the photovoltaic functional layer 400 and the light-emitting functional layer 200.

[0184] In these embodiments, the light-shielding layer 800 can prevent the light emitted by the light-emitting unit 20 from forming a continuous propagation path between the cathode of the light-emitting unit 20 and the first electrode 401, which would cause light leakage at the edge of the display panel.

[0185] The light-shielding layer 800 is located between the photovoltaic functional layer 400 and the light-emitting functional layer 200, establishing a physical light-blocking barrier between the two. Its main function is to cut off the unexpected propagation path of the light emitted by the light-emitting unit 20 inside the display panel.

[0186] In related technologies, in a display panel with an integrated photovoltaic functional layer 400, the cathode of the light-emitting unit 20 and the first electrode 401 of the photovoltaic functional layer 400 are spatially adjacent. Some of the light emitted from the light-emitting unit 20 may form a continuous lateral propagation path between the cathode and the first electrode 401 along the film interface or edge direction. Especially in the edge area of ​​the display panel, such laterally propagated light is more likely to accumulate and leak out to the outside of the panel, forming an edge light leakage phenomenon, which affects the display contrast and visual effect of the display panel.

[0187] The light-shielding layer 800 is disposed between the photovoltaic functional layer 400 and the light-emitting functional layer 200, effectively blocking the aforementioned lateral propagation path, restricting the light emitted by the light-emitting unit 20 to a preset light-emitting direction, preventing the light from forming a lateral waveguide in the interface area between the cathode and the first electrode 401, fundamentally suppressing the generation of edge light leakage, and improving the overall display effect and optical performance of the display panel.

[0188] For example, the light-shielding layer 800 can be made of the same materials and processes as the active layer 405, and has a thickness of 100 to 1000 nanometers.

[0189] The material of the light-shielding layer 800 is the same as that of the active layer 405. The light-shielding layer 800 can be prepared simultaneously in the same process as the preparation of the active layer 405. There is no need to introduce additional special materials or separate deposition steps, which effectively simplifies the overall preparation process, reduces process costs, and fully demonstrates the process economy of being compatible with existing preparation processes.

[0190] Please see Figure 3 In some embodiments, the light-shielding layer 800 includes a plurality of light-shielding sub-parts 8080, and the photovoltaic functional layer 400 includes a plurality of photovoltaic units 40. The orthographic projections of the plurality of light-shielding sub-parts on the substrate 100 overlap with the orthographic projections of the plurality of photovoltaic units 40 on the substrate 100.

[0191] The barrier layer 500 also includes a fourth barrier portion 504 located on at least part of the periphery of the photovoltaic unit 40, and the fourth barrier portion 504 is also in contact with both adjacent light-shielding sub-parts 80.

[0192] In these embodiments, the light-shielding layer 800 is divided into multiple light-shielding sub-sections 80, each of which blocks the light propagation path of the multiple photovoltaic units 40, and adjacent light-shielding sub-sections 80 are separated by a fourth barrier section 504.

[0193] The light-shielding layer 800 is divided into multiple light-shielding sub-parts 80 corresponding to each photovoltaic unit 40. Each light-shielding sub-part 80 overlaps with the corresponding photovoltaic unit 40 in the orthographic projection direction, so that each light-shielding sub-part 80 can cover the bottom area of ​​its corresponding photovoltaic unit 40 nearby. This forms a directional blockage of the lateral propagation path of the light emitted by the light-emitting unit 20 in the photovoltaic unit 40 area towards the photovoltaic functional layer 400, effectively preventing the light emitted by the light-emitting unit 20 from spreading laterally in the interface area between the cathode and the first electrode 401 and causing light leakage at the edge position, thereby improving the display contrast and optical performance of each pixel area.

[0194] Compared to a continuous shading layer 800 covering the entire surface, the shading layer 800 is divided into multiple shading sub-sections 80 corresponding to photovoltaic units 40. This allows the shading function of each shading sub-section 80 to act independently on the corresponding photovoltaic unit 40 area, avoiding unnecessary optical interference introduced by the entire shading layer 800 and facilitating precise control of the shading effect in each area.

[0195] The fourth barrier portion 504 is located on at least part of the periphery of the photovoltaic unit 40 and is in contact with both adjacent light-shielding sub-parts 80. On the one hand, it forms a physical blockage in the lateral area between the two adjacent photovoltaic units 40, further effectively isolating the adjacent photovoltaic units 40. On the other hand, the fourth barrier portion 504 fills the space between the adjacent light-shielding sub-parts 80, realizing the boundary separation of the adjacent light-shielding sub-parts 80, preventing material penetration or connection between the adjacent light-shielding sub-parts 80, ensuring that each light-shielding sub-part 80 independently and stably performs its respective light-shielding function, and further improving the structural integrity and optical reliability of the photovoltaic functional layer 400 integration area.

[0196] Figure 11 It shows Figure 2 Another cross-sectional structure along the BB direction.

[0197] Please see Figure 11 In some embodiments, the light-shielding layer 800 is distributed across the entire surface.

[0198] The photovoltaic functional layer 400 includes multiple photovoltaic units 40, and the barrier layer 500 also includes a fourth barrier portion 504 located on at least part of the periphery of the photovoltaic unit 40. The fourth barrier portion 504 is also in contact with two adjacent photovoltaic units 40 and the shading layer 800.

[0199] In these embodiments, the light-shielding layer 800 is distributed across the entire surface to prevent the cross-section of the first electrode 401 at the junction of the photovoltaic units 40 from reflecting light in the screen-off state, thus affecting the screen-off visual effect. The fourth barrier 504 is arranged around a photovoltaic unit 40, while also achieving the separation between two adjacent photovoltaic units 40.

[0200] Please see Figure 3In some embodiments, the display panel further includes an electrode functional layer 900 located on the side of the photovoltaic functional layer 400 away from the substrate 100. The electrode functional layer 900 includes a plurality of functional electrodes 910, and the light transmittance of the functional electrodes 910 is greater than that of the first electrode 401.

[0201] In these embodiments, the second electrode 402 is on the side away from the substrate 100, and the transmittance of the functional electrode 910 is greater than that of the first electrode 401, ensuring that ambient light enters the active layer 405 of the photovoltaic functional layer 400 from the side away from the substrate 100, and preventing the light emitted by the light-emitting unit 20 from entering the photovoltaic functional layer 400 from the side close to the substrate 100.

[0202] For example, the functional electrode 910 is made of the same materials and processes as the second electrode 402, and has a thickness of 20 to 200 nanometers.

[0203] For example, the functional electrode 910 is a touch electrode.

[0204] Optionally, the functional electrode 910 is an antenna electrode.

[0205] In related technologies, there is also signal crosstalk between the photovoltaic functional layer 400 and the electrode functional layer 900.

[0206] Please continue reading. Figure 3 In some embodiments, the barrier layer 500 further includes a third barrier portion 503, and the display panel further includes a cover layer 920. The third barrier portion 503 is disposed in contact with the surface of the photovoltaic functional layer 400 away from the substrate 100, and the cover layer 920 is located between the functional unit 300 and the photovoltaic functional layer 400 and the electrode functional layer 900.

[0207] In these embodiments, the third barrier 503 and the cover layer 920 together shield the signal crosstalk between the electrode functional layer 900 and the photovoltaic functional layer 400.

[0208] For example, the capping layer 920 is an organic material with a thickness of 2 to 20 micrometers.

[0209] Figure 12 It shows Figure 2 Another cross-sectional structure along the BB direction.

[0210] Please see Figure 12 In some embodiments, the display panel further includes a dam portion 650, which includes a first dam 651 and a second dam 652. The photovoltaic functional layer 400 includes a plurality of photovoltaic units 4040. The first dam 651 is at least partially located on the periphery of the photovoltaic unit, and the second dam 652 is at least partially located on the periphery of the first blocking portion away from the functional unit 300.

[0211] In these embodiments, the arrangement of the first dam 651 and the second dam 652 of the dam section 650 can limit the partial film structure of the photovoltaic unit 40 and the light-shielding layer 800, prevent overflow during the fabrication of the partial film structure of the photovoltaic unit 40 and the light-shielding layer 800, and achieve the patterning of the partial film structure of the photovoltaic unit 40 and the light-shielding layer 800.

[0212] For example, the dam section 650 is made of organic material and is formed using a low-temperature photolithography process.

[0213] Figure 13 The diagram illustrates a flowchart of a method for manufacturing a display panel according to a second aspect embodiment of this application. Figures 14a to 14d The process steps of a method for manufacturing a display panel according to a second aspect embodiment of this application are shown.

[0214] Please see Figure 13 and Figures 14a to 14d Secondly, embodiments of this application provide a method for manufacturing a display panel, comprising: Step S10: A plurality of light-emitting units 20 are formed on one side of the substrate 100 to form a light-emitting functional layer 200; Step S20: A photovoltaic functional layer 400 is prepared on the side of the light-emitting functional layer 200 away from the substrate 100. The photovoltaic functional layer 400 forms a plurality of opening structures 400'. The orthographic projection of the plurality of opening structures 400' on the substrate 100 overlaps with the orthographic projection of the plurality of light-emitting units 20 on the substrate 100. Step S30: A first barrier portion 501 is prepared on the side of the photovoltaic functional layer 400 away from the substrate 100 to form a barrier layer 500. The first barrier portion 501 is disposed in contact with the sidewall of the opening structure 400'. Step S40: A plurality of functional units 300 are prepared on the side of the barrier layer 500 away from the substrate 100, and the functional units 300 are disposed in a plurality of opening structures 400'.

[0215] The method for preparing a display panel provided in the second aspect of this application is used to prepare the display panel provided in any of the first aspects of this application. Therefore, the method for preparing a display panel provided in the second aspect of this application has the beneficial effects of the display panel provided in any of the first aspects of this application, and will not be described again here.

[0216] For example, in step S30, the barrier layer 500 further forms a first opening 505 on the surface of the photovoltaic functional layer 400 facing away from the substrate 100.

[0217] For example, in step S20, since the first electrode is usually different in shape from other film layers in the photovoltaic functional layer, the first electrode is first prepared on its entire surface and then patterned individually.

[0218] For example, in step S20, the first transport layer, the active layer, and the second transport layer can be prepared in one whole layer. When the second electrode is prepared and patterned, the first transport layer, the active layer, the second transport layer, and the second electrode are etched at the same time. Since they have the same shape, they can share a single process, which saves costs.

[0219] Figure 15 The diagram illustrates a flowchart of a method for manufacturing a display panel according to a second aspect embodiment of this application. Figures 16a to 16d The process steps of a method for manufacturing a display panel according to a second aspect embodiment of this application are shown.

[0220] Please see Figure 15 and Figures 16a to 16d In some embodiments, step S20 further includes: Step S21: Prepare a first electrode material layer on the side of the light-emitting functional layer 200 away from the substrate 10 and pattern it to obtain a plurality of first electrodes 401. The first electrodes 401 respectively surround to form a plurality of first openings 401c. Step S22: Prepare a barrier material layer on the side of the light-emitting functional layer 200 away from the substrate 100 and pattern it to obtain a first barrier 651 and a second barrier 652. The first barrier 651 is located on the periphery of the first opening 401c and forms a first limiting structure 643. The second barrier 652 is located on the periphery of the first electrode 401 away from the first opening 401c and forms a second limiting structure 644. Step S23: Sequentially print the first transport layer 403, the active layer 405, and the second transport layer 404 on the side of the first electrode 401 facing away from the substrate 100. Step S24: Prepare a second electrode material layer on the side of the light-emitting functional layer 200 away from the substrate 100 and pattern it to obtain a plurality of second electrodes 402.

[0221] In these embodiments, the first limiting structure 643 and the second limiting structure 644 formed by the first dam 651 and the second dam 652 can also be used to prepare the first transport layer 403, the active layer 405 and the second transport layer 404 to prevent overflow. The photolithography masking step for the first transport layer 403, the active layer 405 and the second transport layer 404 can be omitted, simplifying the process.

[0222] Optionally, the dam material layer can also be prepared before the first electrode 401 preparation step, with the first electrode 401 extending out through the break of the second dam 652 to connect with other photovoltaic units.

[0223] Optionally, the dam material layer can also be prepared before the shading layer 800 preparation step, and the first electrode 401 extends through the break of the second dam 652 to connect with other photovoltaic units.

[0224] In some embodiments, step S30 further includes: Step S31: A first barrier portion is prepared on the side of the second limiting structure away from the substrate, and the first barrier portion extends to contact the sidewall of the second electrode.

[0225] In these embodiments, the first barrier extends to the sidewall of the second electrode for contact, thereby separating the functional unit from the active layer, the first transport layer and the second transport layer of the photovoltaic functional layer through the first limiting structure, and also separating the functional unit from the second electrode of the photovoltaic functional layer through the first barrier, thus avoiding mutual interference between functions.

[0226] In some embodiments, step S40 further includes: Step S41: Fabricate multiple functional units using a printing process.

[0227] In these embodiments, the use of printing technology can also save the photolithography steps for functional units and simplify the process.

[0228] Figure 17 The overall structure of the display device 1000 provided in the third aspect embodiment of this application is shown.

[0229] Please see Figure 17 Thirdly, embodiments of this application provide a display device 1000, including a display panel provided in any first aspect embodiment of this application, or a display panel formed by a method for preparing a display panel provided in any second aspect embodiment of this application.

[0230] The display device 1000 provided in the third aspect embodiment of this application includes a display panel provided in any first aspect embodiment of this application, or a display panel prepared by the method for preparing a display panel provided in any second aspect embodiment of this application. Therefore, it has the beneficial effects of the display panel provided in any first aspect embodiment of this application or the method for preparing a display panel provided in any second aspect embodiment of this application, which will not be described in detail here.

[0231] The display device 1000 in this application embodiment includes, but is not limited to, mobile phones, personal digital assistants, tablet computers, e-books, televisions, access control systems, smart landline phones, control consoles, and other devices with display functions.

[0232] The display device 1000 can be any device with a display function, such as mobile devices such as mobile phones, tablets, laptops, handheld computers, in-vehicle electronic devices, wearable devices, ultra-mobile personal computers (UMPCs), netbooks, or personal digital assistants (PDAs), as well as non-mobile devices such as personal computers (PCs), televisions (TVs), ATMs, or self-service machines.

[0233] Although this application has been described with reference to preferred embodiments, various modifications can be made thereto and components can be replaced with equivalents without departing from the scope of this application. In particular, the technical features mentioned in the various embodiments can be combined in any manner, provided there is no structural conflict. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A display panel, characterized in that, include: substrate; A light-emitting functional layer is disposed on one side of the substrate, and the light-emitting functional layer includes a plurality of light-emitting units; Multiple functional units are disposed on the side of the light-emitting functional layer away from the substrate. The multiple functional units are spaced apart from each other, and the orthographic projections of the multiple functional units on the substrate overlap with the orthographic projections of the multiple light-emitting units on the substrate. A photovoltaic functional layer is disposed on the side of the light-emitting functional layer away from the substrate and sandwiched between adjacent functional units; A barrier layer, the barrier layer including a first barrier portion located between the photovoltaic functional layer and the functional unit.

2. The display panel according to claim 1, characterized in that, The barrier layer further includes a second barrier portion, which is disposed between the functional unit and the light-emitting functional layer. The first barrier portion is bent and connected to the periphery of the second barrier portion and together they enclose a receiving cavity, in which the functional unit is located.

3. The display panel according to claim 1, characterized in that, The barrier layer further includes a third barrier portion, which is disposed in contact with the surface of the photovoltaic functional layer opposite to the substrate; The third barrier portion includes a first opening, the first opening's orthographic projection on the substrate overlaps with the photovoltaic functional layer's orthographic projection on the substrate.

4. The display panel according to claim 1, characterized in that, The photovoltaic functional layer includes a first electrode, a first transport layer, an active layer, a second transport layer, and a second electrode stacked in a direction away from the substrate, wherein the light transmittance of the second electrode is greater than that of the first electrode.

5. The display panel according to claim 4, characterized in that, The photovoltaic functional layer includes multiple photovoltaic units arranged in an array; Wherein, along the first direction, the first electrode of one photovoltaic unit is electrically connected to the second electrode of an adjacent photovoltaic unit, or, The first electrodes of two adjacent photovoltaic units are electrically connected to each other, and the second electrodes of two adjacent photovoltaic units are electrically connected to each other.

6. The display panel according to claim 5, characterized in that, Along the first direction, the first electrode of one photovoltaic unit is electrically connected to the second electrode of another adjacent photovoltaic unit to form a first photovoltaic device group. The first electrode includes a first body portion and a first extension portion located at least partially around the photovoltaic unit. The second electrode includes a second body portion and a second extension portion located at least partially around the photovoltaic unit. The first body portion is electrically connected to the first extension portion, and the second body portion is electrically connected to the second extension portion. The second extension extends from the surface of at least one of the barrier layer, the first transport layer, the active layer, and the second transport layer away from the substrate, and overlaps with the surface of the first extension away from the substrate.

7. The display panel according to claim 6, characterized in that, The second extension portion overlaps with the surface of the second body portion opposite to the substrate. The barrier layer also includes a fourth barrier portion located on at least part of the periphery of the photovoltaic unit. The second extension portion extends from the surface of the fourth barrier portion opposite to the substrate.

8. The display panel according to claim 6, characterized in that, The display panel further includes a first common sub-electrode located on one side of the display panel along the first direction and a second common sub-electrode located on the other side of the display panel along the first direction. The first common sub-electrode and the second common sub-electrode extend along a second direction, and the first direction intersects the second direction. The first electrodes of the plurality of first photovoltaic device groups are electrically connected to the first common sub-electrode on one side of themselves along the first direction, and the second electrodes of the plurality of first photovoltaic device groups are electrically connected to the second common sub-electrode on the other side of themselves along the first direction.

9. The display panel according to claim 8, characterized in that, The substrate further includes an array circuit layer, wherein at least one of the first common sub-electrode and the second common sub-electrode is disposed on the same layer as the second electrode, or... At least one of the first common sub-electrode and the second common sub-electrode is located in the array circuit layer.

10. The display panel according to claim 8, characterized in that, The display panel has a display area and a peripheral area surrounding the display area. The first common sub-electrode and the second common sub-electrode are located in the peripheral area. The display panel also includes a light-blocking portion located on the side of the photovoltaic functional layer opposite to the substrate. The light-blocking portion is located in the peripheral area, and the orthographic projection of the light-blocking portion on the substrate overlaps with the orthographic projections of the first common sub-electrode and the second common sub-electrode on the substrate.

11. The display panel according to claim 10, characterized in that, The light-blocking part includes a black light-blocking material, or the light-blocking part includes three light-filtering parts of different colors that are stacked sequentially along the direction away from the substrate.

12. The display panel according to claim 5, characterized in that, Along the first direction, the first electrodes of two adjacent photovoltaic units are electrically connected to each other, and the second electrodes of two adjacent photovoltaic units are electrically connected to each other to form a second photovoltaic device group; Within a second photovoltaic device group, the first electrode and the second electrode are continuously distributed, and the second electrode extends from the surface of at least one of the barrier layer, the first transport layer, the active layer and the second transport layer on the side opposite to the substrate.

13. The display panel according to claim 12, characterized in that, The second electrode includes a second body portion and a second extension portion located at least partially around the photovoltaic unit; Within a second photovoltaic device group, two adjacent second body portions are electrically connected via a second extension portion. The barrier layer further includes a fourth barrier portion located at least partially around the photovoltaic unit, and the second extension portion extends from the surface of the fourth barrier portion away from the substrate.

14. The display panel according to claim 13, characterized in that, The second extension portion overlaps with the surface of the second body portion on the side opposite to the substrate.

15. The display panel according to claim 13, characterized in that, The second extension portion is disposed on the same layer as the second main body portion.

16. The display panel according to claim 5, characterized in that, The display panel also includes an auxiliary electrode, which is electrically connected to the second electrode.

17. The display panel according to claim 16, characterized in that, The auxiliary electrode is disposed in contact with at least a portion of the surface of the second electrode facing away from the substrate, and the light transmittance of the auxiliary electrode is greater than that of the first electrode.

18. The display panel according to claim 16, characterized in that, The auxiliary electrode includes multiple auxiliary units, and the orthographic projections of the multiple auxiliary units on the substrate overlap with the orthographic projections of the multiple photovoltaic units on the substrate.

19. The display panel according to claim 18, characterized in that, The auxiliary unit is a grid wiring structure or a parallel wiring structure, and the orthographic projection of the auxiliary unit on the substrate is at least partially offset from the orthographic projection of the light-emitting unit on the substrate.

20. The display panel according to claim 1, characterized in that, The display panel further includes a light-shielding layer, which is disposed between the photovoltaic functional layer and the light-emitting functional layer.

21. The display panel according to claim 20, characterized in that, The light-shielding layer includes multiple light-shielding sub-parts, and the photovoltaic functional layer includes multiple photovoltaic units. The orthographic projections of the multiple light-shielding sub-parts on the substrate overlap with the orthographic projections of the multiple photovoltaic units on the substrate. The barrier layer further includes a fourth barrier portion located on at least a portion of the periphery of the photovoltaic unit, and the fourth barrier portion is also in contact with both adjacent light-shielding sub-parts.

22. The display panel according to claim 20, characterized in that, The light-shielding layer is distributed across the entire surface; The photovoltaic functional layer includes multiple photovoltaic units, and the barrier layer also includes a fourth barrier portion located on at least part of the periphery of the photovoltaic unit. The fourth barrier portion is also in contact with two adjacent photovoltaic units and the shading layer.

23. The display panel according to claim 4, characterized in that, The display panel further includes an electrode functional layer located on the side of the photovoltaic functional layer opposite to the substrate. The electrode functional layer includes a plurality of functional electrodes, and the light transmittance of the functional electrodes is greater than that of the first electrode.

24. The display panel according to claim 23, characterized in that, The barrier layer further includes a third barrier portion, and the display panel further includes a cover layer. The third barrier portion is disposed in contact with the surface of the photovoltaic functional layer opposite to the substrate, and the cover layer is located between the functional unit and the photovoltaic functional layer and the electrode functional layer.

25. The display panel according to claim 1, characterized in that, The display panel further includes a dam section, which includes a first dam and a second dam. The photovoltaic functional layer includes multiple photovoltaic units. The first dam is at least partially located on the periphery of the photovoltaic unit, and the second dam is at least partially located on the periphery of the first barrier section away from the functional unit.

26. A method for manufacturing a display panel, characterized in that, include: Multiple light-emitting units are fabricated on one side of the substrate to form a light-emitting functional layer; A photovoltaic functional layer is prepared on the side of the light-emitting functional layer away from the substrate. The photovoltaic functional layer is respectively enclosed to form a plurality of opening structures. The orthographic projection of the plurality of opening structures on the substrate overlaps with the orthographic projection of the plurality of light-emitting units on the substrate. A first barrier portion is prepared on the side of the photovoltaic functional layer away from the substrate to form a barrier layer, and the first barrier portion is disposed in contact with the sidewall of the opening structure; Multiple functional units are fabricated on the side of the barrier layer away from the substrate, and the functional units are disposed within multiple opening structures.

27. The method for manufacturing a display panel according to claim 26, characterized in that, The step of fabricating the photovoltaic functional layer on the side of the light-emitting functional layer opposite to the substrate further includes: A first electrode material layer is prepared on the side of the light-emitting functional layer away from the substrate and patterned to obtain a plurality of first electrodes, and the first electrodes are respectively enclosed to form a plurality of first openings; A dam material layer is prepared on the side of the light-emitting functional layer away from the substrate and patterned to obtain a first dam and a second dam. The first dam is located on the periphery of the first opening and forms a first limiting structure. The second dam is located on the periphery of the first electrode away from the first opening and forms a second limiting structure. A first transport layer, an active layer, and a second transport layer are sequentially printed on the side of the first electrode opposite to the substrate. A second electrode material layer is prepared on the side of the light-emitting functional layer opposite to the substrate and patterned to obtain multiple second electrodes.

28. The method for manufacturing a display panel according to claim 27, characterized in that, The step of forming a barrier layer by preparing the first barrier portion on the side of the photovoltaic functional layer opposite to the substrate further includes: The first barrier portion is prepared on the side of the second limiting structure away from the substrate, and the first barrier portion extends to contact the sidewall of the second electrode.

29. The method for manufacturing a display panel according to claim 28, characterized in that, The step of fabricating multiple functional units on the side of the barrier layer opposite to the substrate further includes: Multiple functional units are fabricated using a printing process.

30. A display device, characterized in that, The display panel includes the display panel according to any one of claims 1 to 25, or the display panel formed by the method of preparing the display panel according to any one of claims 26 to 29.

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