Cathode hybrid interface and application thereof

Abstract

The invention discloses a cathode hybrid interface and application thereof, and belongs to the technical field of solar cell devices. The cathode hybrid interface prepared by the invention comprises an inorganic amorphous material and an organic cathode interface material, the inorganic amorphous material is one or more of ZnO (zinc oxide), TiO2 (titanium dioxide), SnO2 (stannic oxide), La2O3 (lanthanum oxide) and CeO4 (cerium oxide); and the organic cathode interface material is one or more of PFN, PFN-Br, F3N, F3N-Br, PDIN, PDINO and PDINN. The cathode hybrid interface prepared by the invention effectively inhibits the aggregation of an organic cathode interface material, optimizes the morphology of an interface layer, reduces leakage current and series resistance, and improves the conductivity of the interface layer at the same time; the energy conversion efficiency of the solar cell is effectively improved, and the use efficiency of the solar cell is improved; the solar cell has a wide application prospect in the technical field of solar cells.

Description

Technical Field

[0001] The present application belongs to the technical field of solar cell devices, and in particular relates to a cathode hybrid interface and its application. Background Art

[0002] Organic solar cells, a new photovoltaic technology capable of effectively converting solar energy into electricity, are a hot topic in the photovoltaic field due to their lightweight, easy processing, and simple manufacturing process. However, compared to traditional silicon-based cells and emerging perovskite cells, organic solar cells still have a certain performance gap. Their main shortcomings are insufficient open-circuit voltage and low fill factor, resulting in low energy conversion efficiency. Therefore, the development of organic solar cells with high energy conversion efficiency is an urgent problem that needs to be solved.

[0003] Although many advances have been made in the design of organic photovoltaic materials and the regulation of active layer structure in recent years, the research on the interface layer has lagged behind, especially the role of the cathode interface layer in the overall performance of the device has not been fully explored. At present, the commonly used cathode interface materials mainly include organic small molecules or polymer interface materials and metal oxides. Among them, organic small molecules have problems such as easy aggregation and unstable interface morphology, which often lead to increased device series resistance and current leakage risks; although polymer interface materials have good electrical properties, their preparation often relies on high energy consumption or complex equipment, such as sputtering deposition, thermal annealing or atomic layer deposition, which is difficult to meet the needs of low cost and large-scale production. Therefore, the development of new cathode interface materials with excellent comprehensive performance has become an important direction for improving the performance of organic solar cells, and has provided new technical ideas for device structure design and interface regulation. Summary of the Invention

[0004] The present application discloses a cathode hybrid interface and its application, aiming to solve the technical problems of low charge transfer efficiency and low energy conversion efficiency of existing organic solar cells.

[0005] In order to achieve the above objectives, the technical solution of this application is:

[0006] A first aspect of the present application provides a cathode hybrid interface, comprising: an inorganic amorphous material and an organic cathode interface material;

[0007] The inorganic amorphous material is one or more of ZnO, TiO2, SnO2, La2O3, and CeO4;

[0008] The organic cathode interface material is one or more of PFN, PFN-Br, F3N, F3N-Br, PDIN, PDINO, and PDINN.

[0009] In combination with the first aspect, preferably, the mass ratio of the inorganic amorphous material and the organic cathode interface material is (70-99):(1-30).

[0010] In combination with the first aspect, preferably, the mass ratio of the inorganic amorphous material and the organic cathode interface material is 95:5.

[0011] The second aspect of the present application provides an organic solar cell device, comprising a conductive substrate, an anode interface layer, an active layer, a cathode hybrid interface and a cathode, wherein the cathode hybrid interface comprises the cathode hybrid interface of the first aspect.

[0012] In combination with the second aspect, preferably, the conductive substrate is one or more of indium tin oxide glass, fluorine-doped tin dioxide glass, aluminum-doped zinc oxide glass, ITO-polyethylene terephthalate, ITO-polyethylene naphthalate.

[0013] The anode interface layer is one or more of poly(3,4-ethylenedioxythiophene) or polystyrene sulfonic acid, 2PACz.

[0014] In combination with the second aspect, preferably, the active layer comprises a donor material and an acceptor material.

[0015] The donor material is one or more of PM6, D18, PBDB-T, J52.

[0016] The acceptor material is one or more of Y6, BTP-eC9, L8-BO, Y18, Y11, PY-DT, DYF-TF, ITIC.

[0017] The cathode is one or more of silver, aluminum, gold.

[0018] The third aspect of the present application provides a preparation method of the organic solar cell device of the second aspect, wherein the preparation method comprises:

[0019] forming an anode interface layer on the conductive substrate;

[0020] preparing a composite solution of the donor material and the acceptor material, spin-coating the composite solution on the anode interface, and performing thermal annealing treatment to form an active layer;

[0021] preparing a composite solution of the inorganic amorphous material and the organic cathode interface material, spin-coating the composite solution on the active layer to form a cathode hybrid interface;

[0022] forming a cathode layer on the cathode hybrid interface.

[0023] In combination with the third aspect, preferably, the concentration of the composite solution of the donor material and the acceptor material is 10 mg / mL-30 mg / mL.

[0024] In combination with the third aspect, preferably, the temperature of the thermal annealing treatment is 60-160° C., and the time is 5-15 minutes.

[0025] The fourth aspect of the present application provides an application of the organic solar cell device described in the second aspect or the organic solar cell device manufactured by the preparation method described in the third aspect in the field of solar cell technology.

[0026] Compared with the prior art, the advantages or beneficial effects of the embodiments of the present application include at least:

[0027] The cathode hybrid interface provided by this application is made by combining inorganic amorphous materials and organic cathode interface materials. On the one hand, the hybrid interface is formed by inorganic amorphous materials and organic cathode interface materials, which effectively inhibits the aggregation of organic cathode interface materials, optimizes the morphology of the interface layer, reduces leakage current and series resistance, and improves the conductivity of the interface layer. On the other hand, it can effectively improve the energy conversion efficiency of solar cells and improve the utilization efficiency of solar cells. The optimal open circuit voltage is 0.925V and the optimal short circuit current density is 26.98mA / cm 2 The optimal fill factor is 82.7%, the optimal energy conversion efficiency is 20.6%, and it has good solar cell performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] To more clearly illustrate the technical solutions of the embodiments of this application, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some of the embodiments described in this application. For those skilled in the art, other drawings can be derived from these drawings without inventive effort.

[0029] Figure 1 This is a scanning electron microscope image of the Al-cathode hybrid interface provided in the examples of the present application;

[0030] Figure 2 This is a graph showing the current and voltage (IV) characteristics of a solar cell device fabricated using an Al-cathode hybrid interface according to an embodiment of the present application;

[0031] Figure 3 This is a schematic diagram of the structure of a solar cell device made of an Al-cathode hybrid interface provided in an embodiment of the present application;

[0032] Figure 4 1 is a graph showing the current density and voltage (JV) characteristics of a solar cell device fabricated with an Al-cathode hybrid interface provided in an embodiment of the present application;

[0033] Figure 5This is a charge extraction characteristic curve of a solar cell device made of an Al-cathode hybrid interface provided in an embodiment of the present application;

[0034] Figure 6 This is the interface resistance diagram of the solar cell device made of the Al-cathode hybrid interface provided in the examples of the present application. DETAILED DESCRIPTION

[0035] The following will be combined with the accompanying drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the described embodiments are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0036] In the following description of this embodiment, the term "and / or" is used to describe the association relationship between associated objects, indicating that three possible relationships exist. For example, A and / or B can represent: A exists alone, B exists alone, and both A and B exist. A and B can be singular or plural. The character " / " generally indicates that the associated objects are in an "or" relationship.

[0037] In the following description of this embodiment, the term "at least one" refers to one or more, and "plurality" refers to two or more. "At least one of the following" or similar expressions refers to any combination of these items, including any combination of single items or plural items. For example, "at least one of a, b, or c", or "at least one of a, b, and c" can all represent: a, b, c, ab (i.e., a and b), ac, bc, or abc, where a, b, and c can be single or multiple.

[0038] Those skilled in the art should understand that in the following description of the embodiments of the present application, the order of serial numbers does not mean the order of execution, some or all of the steps can be executed in parallel or sequentially, and the execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

[0039] The terms used in the embodiments of the present application are only for the purpose of describing specific embodiments and are not intended to limit the present application. The singular forms "a", "an" and "the" used in the embodiments of the present application and the appended claims are also intended to include plural forms unless the context clearly indicates otherwise.

[0040] It should be noted that all raw materials and / or reagents in the examples of the present application were purchased on the market or prepared according to conventional methods well known to those skilled in the art.

[0041] In a first aspect, embodiments of the present application provide a cathode hybrid interface, comprising: an inorganic amorphous material and an organic cathode interface material;

[0042] The inorganic amorphous material is one or more of ZnO, TiO2, SnO2, La2O3, and CeO4;

[0043] The organic cathode interface material is one or more of PFN, PFN-Br, F3N, F3N-Br, PDIN, PDINO, and PDINN.

[0044] On the one hand, the hybrid interface formed by the inorganic amorphous material and the organic cathode interface material effectively inhibits the aggregation of the organic cathode interface material, optimizes the morphology of the interface layer, reduces the leakage current and series resistance, and improves the conductivity of the interface layer; on the other hand, it can effectively improve the energy conversion efficiency of solar cells and improve the utilization efficiency of solar cells. The optimal open circuit voltage is 0.925V and the optimal short circuit current density is 26.98mA / cm 2 The optimal fill factor is 82.7%, the optimal energy conversion efficiency is 20.6%, and it has good solar cell performance.

[0045] It should be noted that the organic cathode interface material PFN is a water / alcohol-soluble polyelectrolyte interface material that not only reduces the contact barrier between the active layer and the electrode, but also forms an interface dipole, enhancing the device's built-in electric field. Its molecular structure is shown in Formula 1. The organic cathode interface material PFN-Br is a polyelectrolyte, making it soluble in highly polar solvents. Its molecular structure is shown in Formula 2. The organic cathode interface material F3N is a polyelectrolyte, making it soluble in highly polar solvents. Its molecular structure is shown in Formula 3. The molecular structure of the organic cathode interface material F3N-Br is shown in Formula 4. The molecular structure of the organic cathode interface material PDIN is shown in Formula 5. The molecular structure of the organic cathode interface material PDINO is shown in Formula 6. The molecular structure of the organic cathode interface material PDINN is shown in Formula 7.

[0046]

[0047]

[0048] In the embodiments of the present application, the mass ratio of the inorganic amorphous material to the organic cathode interface material is preferably (70-99): (1-30), and more preferably 95:5. By controlling the mass ratio of the inorganic amorphous material to the organic cathode interface material, a porous morphology can be formed, effectively suppressing the aggregation of the organic cathode interface material, reducing leakage current and series resistance, and simultaneously increasing the conductivity of the interface layer, effectively improving the charge extraction and charge transfer performance of the device.

[0049] In a second aspect, an embodiment of the present application provides an organic solar cell device, comprising a conductive substrate, an anode interface layer, an active layer, a cathode hybrid interface and a cathode, wherein the cathode hybrid interface comprises the cathode hybrid interface described in the first aspect.

[0050] In an embodiment of the present application, the conductive substrate is preferably one or more of indium tin oxide glass, fluorine-doped tin dioxide glass, aluminum-doped zinc oxide glass, ITO-polyethylene terephthalate, and ITO-polyethylene naphthalate; the anode interface layer is preferably one or more of poly (3,4-ethylenedioxythiophene), polystyrene sulfonic acid, and 2PACz.

[0051] The molecular structure of 2PACz in the anode interface layer is shown in Formula 20.

[0052]

[0053] In the embodiments of the present application, the active layer includes a donor material and an acceptor material. The donor material is preferably one or more of PM6, D18, PBDB-T, and J52; the acceptor material is preferably one or more of Y6, BTP-eC9, L8-BO, Y18, Y11, PY-DT, DYF-TF, and ITIC; and the cathode is preferably one or more of silver, aluminum, and gold. The molecular structure of the PM6 donor material is shown in Formula 8. The molecular structure of the D18 donor material is shown in Formula 9. The molecular structure of the PBDB-T donor material is shown in Formula 10. The molecular structure of the J52 donor material is shown in Formula 11.

[0054]

[0055] The molecular structure of the acceptor material Y6 is shown in Formula 12. The molecular structure of the acceptor material BTP-eC9 is shown in Formula 13. The molecular structure of the acceptor material L8-BO is shown in Formula 14. The molecular structure of the acceptor material Y18 is shown in Formula 15. The molecular structure of the acceptor material Y11 is shown in Formula 16. The molecular structure of the acceptor material PY-DT is shown in Formula 17. The molecular structure of the acceptor material DYF-TF is shown in Formula 18. The molecular structure of the acceptor material ITIC is shown in Formula 19.

[0056]

[0057]

[0058] It should be noted that the present application does not impose any particular restrictions on the solvents for dissolving the donor and acceptor materials, that is, it is sufficient to dissolve the donor and acceptor materials. The organic solvent used in the present application is preferably one or more of chlorobenzene, chloroform, toluene, o-xylene, and tetrahydrofuran.

[0059] It should be noted that the present application does not impose any particular restrictions on the solvent for dissolving the inorganic amorphous material and the organic cathode interface material, that is, it is sufficient to dissolve the inorganic amorphous material and the organic cathode interface material. The solvent used in the present application is preferably one of methanol, acetic acid, or a combination thereof.

[0060] In a third aspect, an embodiment of the present application provides a method for preparing the organic solar cell device according to the second aspect, comprising:

[0061] forming an anode interface layer on a conductive substrate;

[0062] preparing a composite solution of a donor material and an acceptor material, spin-coating the composite solution on the anode interface layer, and performing a thermal annealing treatment to form an active layer;

[0063] preparing a composite solution of an inorganic amorphous material and an organic cathode interface material, and spin-coating the composite solution on the active layer to form a cathode hybrid interface;

[0064] A cathode layer is prepared on the cathode hybrid interface.

[0065] In the examples of the present application, the concentration of the composite solution of the donor material and the acceptor material is preferably 10 mg / mL to 30 mg / mL. Controlling the concentration of the solution can control the microscopic morphology of the prepared active layer film, achieving an appropriate phase separation scale. It can also form a sufficient donor-acceptor interface area, thereby improving exciton separation efficiency.

[0066] In the embodiments of the present application, the thermal annealing treatment is performed at a temperature of 60-160°C for 5-15 minutes. The thermal annealing treatment in a dust-free environment can eliminate internal stress in the film, improve the mechanical properties and stability of the film, and optimize the interface quality between the donor layer and the acceptor layer.

[0067] The cathode hybrid interface used in this application is made by compounding inorganic amorphous materials and organic cathode interface materials. The energy conversion efficiency of the organic solar cell device made therefrom can reach up to 20.6%.

[0068] Fourthly, the embodiments of the present application also provide applications of organic solar cell devices in the field of solar cell technology. Based on the advantages of high energy conversion efficiency of organic solar cell devices as described above, they can be widely used in the field of solar cell technology.

[0069] The technical solution of the present application will be further described below in conjunction with specific embodiments.

[0070] Example 1

[0071] This embodiment provides a method for preparing an Al-cathode hybrid interface, which specifically includes:

[0072] Dissolve F3N in methanol and 0.5% acetic acid by volume as solvents, stir at room temperature for 2 hours to prepare a 1.4 mg / mL F3N solution; dissolve amorphous zinc oxide in methanol as solvent to prepare a 1.4 mg / mL amorphous zinc oxide solution, and ultrasonically treat for 0.5 hours; mix the F3N solution and the amorphous zinc oxide solution in a mass ratio of 95:5, and spin-coat the mixed cathode hybrid interface solution onto the substrate at a speed of 4200 rpm to obtain the Al-cathode hybrid interface (hybrid interface AZnO-F3N). Its appearance is as follows Figure 1 shown.

[0073] according to Figure 1 Transmission electron microscopy (TEM) was used to characterize the morphology of the cathode hybrid interface film. The F3N cathode interface film exhibited a rough and porous structure, while the hybrid interface AZnO-F3N formed after the introduction of amorphous zinc oxide showed a uniform film morphology without obvious porous structure. This improvement indicates that the introduction of amorphous metal oxide effectively optimized the morphology of the F3N interface, forming a more favorable morphology, reducing leakage current and series resistance, while increasing the conductivity of the interface layer, effectively improving the charge extraction and charge transport performance of the device, and further improving the efficiency of organic solar cells.

[0074] Example 2

[0075] The cathode hybrid interface component ratio, preparation operation and process parameters prepared in this example are basically the same as those in Example 1, except that in this example, the mass ratios of F3N solution to amorphous zinc oxide solution are 100:0, 97:3, 90:10, 80:20 and 70:30, respectively, to prepare B1-cathode hybrid interface, A2-cathode hybrid interface, A3-cathode hybrid interface, A4-cathode hybrid interface and A5-cathode hybrid interface, respectively.

[0076] In order to explore the influence of the mass ratio of F3N and amorphous zinc oxide on the photovoltaic performance of the solar cell device, the conductivity of the device prepared by the cathode hybrid interface of the embodiment was tested. The device structure was: ITO / cathode interface layer / Ag. The ITO glass substrate was pre-plasma cleaned for 1 minute, and then the glass sheet was transferred to a nitrogen-filled glove box; the cathode interface layer prepared in Example 1-2 was spin-coated on the ITO glass at a speed of 1000 rpm; then, the prepared glass sheet was transferred to a vacuum evaporation chamber and heated for 10 min.-5 A 100 nm thick Ag electrode was deposited by thermal evaporation at 50 Pa.

[0077] The current-voltage characteristic curves of the new hybrid interface AZnO-F3N and the traditional organic F3N interface are shown in Figure 2. Figure 2 As shown, the electrical conductivity of the hybrid interface AZnO-F3N is 3.60×10 -5 S / cm, compared with the conductivity of traditional interface F3N of 3.23×10 - 5 S / cm has been improved to a certain extent.

[0078] Example 3

[0079] This embodiment provides a method for preparing an Al-organic solar cell (D18: L8-BO / AZnO-T3N), which specifically includes:

[0080] (1) The ITO glass substrate was plasma cleaned for 1 min and then transferred to a glove box filled with nitrogen.

[0081] (2) 2PACz solution was spin-coated onto ITO glass at 3000 rpm and annealed on a hot plate at 100 °C for 5 min;

[0082] (3) The glass slide was transferred to a nitrogen-filled glove box and a pre-prepared active layer solution consisting of D18, L8-BO, and chloroform was spin-coated. Afterwards, the mixed film was thermally annealed at 100 °C for 3 min.

[0083] (4) The Al-cathode hybrid interface prepared in Example 1 was spin-coated onto the ITO glass at a speed of 1000 rpm. Subsequently, the prepared glass sheet was transferred to a vacuum deposition chamber and heated for 10 min. -5 A 100 nm Ag electrode was deposited by thermal evaporation under Pa; finally, an Al-organic solar cell (D18: L8-BO / AZnO-T3N) was obtained.

[0084] The cathode hybrid interface prepared in the embodiment was made into an organic solar cell device, and its device structure was: ITO / 2PACz / active layer cathode interface layer / Ag. In order to verify the photovoltaic performance of the organic solar cell prepared in the embodiment and the comparative example of the present application, the device was exposed to standard AM 1.5G sunlight (100mW / cm 2 ) conditions. The simulated light source was calibrated with a standard silicon reference cell before testing to ensure an irradiance of 100mW / cm 2The J–V characteristic curves of the photovoltaic device were measured by a source meter (Keithley 2400 Source Meter) in a nitrogen atmosphere glove box with a scan step of 0.02 V and a test range of -0.1 to 1 V. The active area of ​​the device was defined by a mask, typically 0.0315 cm 2 , to avoid the influence of edge effects on efficiency.

[0085] The test results include open circuit voltage (V oc ), short-circuit current (J sc ), fill factor (FF) and power conversion efficiency (PCE), where:

[0086] PCE=V oc *J sc *FF / Pin (Pin is the intensity of incident light). The comprehensive performance test is shown in Table 1.

[0087] Table 1 Comprehensive performance of solar devices

[0088]

[0089]

[0090] According to Table 1, when the inorganic amorphous material is introduced into the cathode hybrid interface, the open circuit voltage gradually increases and then decreases with the increase of the content of the inorganic amorphous material, indicating that the addition of the inorganic amorphous material can appropriately increase the open circuit voltage of the battery; when the ZnO content is 5%, the open circuit voltage, short-circuit current density and fill factor are greatly improved, and the energy conversion efficiency reaches a maximum of 20.6%, which is much higher than that of the comparative example (19.3%), indicating that the introduction of the inorganic amorphous material into the cathode hybrid interface effectively improves the photovoltaic performance of the organic solar cell.

[0091] Example 4

[0092] The composition ratio, preparation operation and process parameters of the organic solar cell prepared in this embodiment are basically the same as those in Example 3, except that the cathode hybrid interface in this embodiment is made of ASnO2-F3N with a mass ratio of 95:5, obtaining an A2-organic solar cell (D18: L8-BO / ASnO2-F3N).

[0093] Example 5

[0094] The composition ratio, preparation operation and process parameters of the organic solar cell prepared in this embodiment are basically the same as those in Example 3, except that the cathode hybrid interface in this embodiment is made of ALa2O3-F3N with a mass ratio of 95:5, obtaining an A3-organic solar cell (D18: L8-BO / ALa2O3-F3N).

[0095] In order to verify the influence of the addition of the cathode hybrid interface on the performance of the organic solar cell, the present application provides a comparative example for comparison and illustration.

[0096] Comparative Example 1

[0097] The organic solar cell prepared in the present comparative example has the same component distribution ratio and preparation operation and process parameters as those of Example 3, and the difference lies in that the B1-cathode hybrid interface is used in the present example to obtain a B1-organic solar cell (D18:L8-BO / F3N).

[0098] In order to verify the structural performance of the organic solar cell prepared in the present application, the organic solar cell prepared in the example is characterized, and the results are shown in Table 1. Figure 3

[0099] According to Table 1, the organic solar cell prepared in the present application is sequentially provided from bottom to top with an ITO glass sheet, an anode interface layer (2PACz), an active layer, a cathode hybrid interface (AZnO-T3N), and a cathode layer (Ag). Figure 3

[0100] In order to verify the photovoltaic performance of the organic solar cell prepared in the present application and the comparative example, the organic solar cell devices prepared in the example and the comparative example are tested under the condition of standard AM 1.5G sunlight (100 mW / cm 2 ) using a solar simulator, and the test results are shown in Table 2.

[0101] Table 2 Photovoltaic performance of the organic solar cell prepared in the example and the comparative example

[0102]

[0103] According to Table 2, the addition of the inorganic amorphous material has a positive effect on the comprehensive performance of the solar device in terms of photoelectric conversion efficiency, stability, and carrier transport performance, and the efficiency of the obtained D18:L8-BO system organic solar cell is optimal at 20.6%. Compared with the F3N cathode interface device (19.3%) without introducing the amorphous material, the efficiency is improved by 6.7%, which significantly improves the overall performance of the solar device.

[0104] At the same time, in order to further explore the influence of the cathode hybrid interface on the organic solar cell device, the devices prepared are comprehensively compared, and the results are shown in Table 3. Figure 4-6

[0105] According to Table 3, the performance of the devices with the hybrid interface AZnO-F3N and the non-hybrid interface F3N, the introduction of AZnO-F3N has a significant improvement on the performance of the device. Figure 4 ​​​​

[0106] according to Figure 5 As shown in the figure, the difference in charge extraction ability of the cathode interface was tested, and the charge extraction of the hybrid interface AZnO-F3N and the non-hybrid interface in the organic solar cell of the D18:L8-BO system was calculated. Among them, the charge extraction time of the hybrid interface was 0.172μs, which was significantly reduced compared with the non-hybrid interface (0.187μs). The results show that the charge extraction ability of the hybrid interface is stronger, which is beneficial to the charge extraction and charge transfer in the device.

[0107] according to Figure 6 As shown in Figure 1, electrochemical impedance spectroscopy tests were performed on organic solar cell devices prepared with different cathode interface layers to test the interface resistance of different cathode interface materials. Figure 6 As shown, the series resistance of the hybrid interface AZnO-F3N device is 1.43Ωcm 2 , which is significantly lower than that of the non-hybrid interface F3N device (2.03Ωcm 2 This further confirms the superior charge transport properties of AZnO-F3N, which contributes to the improved FF of the corresponding device. The results show that the hybrid interface has a lower series resistance, indicating a stronger charge transport capability. This is consistent with the conductivity results, further demonstrating that the hybrid interface facilitates charge extraction and transfer in the device.

[0108] Therefore, the cathode hybrid interface provided by the present application is made by compounding inorganic amorphous materials and organic cathode interface materials, which effectively inhibits the aggregation of organic cathode interface materials, optimizes the morphology of the interface layer, reduces leakage current and series resistance, and at the same time improves the conductivity of the interface layer; effectively improves the energy conversion efficiency of solar cells, improves the utilization efficiency of solar cells, and has broad application prospects in the field of solar cell technology.

[0109] The various embodiments in this specification are described in a progressive manner. The same or similar parts between the various embodiments can be referenced to each other, and each embodiment focuses on the differences from other embodiments.

[0110] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit the present application. Although the present application has been described in detail with reference to the aforementioned embodiments, a person skilled in the art should understand that the technical solutions described in the aforementioned embodiments can still be modified, or some or all of the technical features therein can be replaced by equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the present application.

Claims

1. A cathode hybrid interface, characterized in that include: Inorganic amorphous materials and organic cathode interface materials; The inorganic amorphous material is one or more of ZnO, TiO2, SnO2, La2O3, and CeO4; The organic cathode interface material is one or more of PFN, PFN-Br, F3N, F3N-Br, PDIN, PDINO, and PDINN.

2. The cathode hybrid interface according to claim 1, characterized in that The mass ratio of the inorganic amorphous material to the organic cathode interface material is (70-99): (1-30).

3. The cathode hybrid interface according to claim 2, characterized in that The mass ratio of the inorganic amorphous material to the organic cathode interface material is 95:

5.

4. An organic solar cell device comprising a conductive substrate, an anode interface layer, an active layer, a cathode hybrid interface and a cathode, characterized in that: The cathode hybrid interface comprises the cathode hybrid interface described in any one of claims 1-3.

5. The organic solar cell device according to claim 4, characterized in that The conductive substrate is one or more of indium tin oxide glass, fluorine-doped tin dioxide glass, aluminum-doped zinc oxide glass, ITO-polyethylene terephthalate, and ITO-polyethylene naphthalate; The anode interface layer is one or more of poly (3,4-ethylenedioxythiophene), polystyrene sulfonic acid, and 2PACz.

6. The organic solar cell device according to claim 4, characterized in that The active layer includes a donor material and an acceptor material; The donor material is one or more of PM6, D18, PBDB-T, and J52; The receptor material is one or more of Y6, BTP-eC9, L8-BO, Y18, Y11, PY-DT, DYF-TF, and ITIC; The cathode is one or more of silver, aluminum and gold.

7. A method for preparing an organic solar cell device according to any one of claims 4 to 6, characterized in that: The preparation method comprises: forming an anode interface layer on a conductive substrate; preparing a composite solution of a donor material and an acceptor material, spin-coating the composite solution on the anode interface layer, and performing a thermal annealing treatment to form an active layer; preparing a composite solution of an inorganic amorphous material and an organic cathode interface material, and spin-coating the composite solution on the active layer to form a cathode hybrid interface; A cathode layer is prepared on the cathode hybrid interface.

8. The method for preparing an organic solar cell device according to claim 7, wherein: The concentration of the composite solution of the donor material and the acceptor material is 10 mg / mL-30 mg / mL.

9. The method for preparing an organic solar cell device according to claim 7, wherein: The temperature of the thermal annealing treatment is 60-160° C., and the time is 5-15 minutes.

10. Use of the organic solar cell device according to any one of claims 4 to 6 or the organic solar cell device manufactured by the preparation method according to any one of claims 7 to 9 in the field of solar cell technology.

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