PN interactive organic solar cell module and preparation method thereof

Abstract

The invention belongs to the technical field of organic solar cells, and particularly relates to a PN interaction type organic solar cell module and a preparation method thereof. The solar cell comprises a metal counter electrode, a plurality of sub-cells and a transparent conductive substrate which are sequentially arranged from top to bottom, the sub-cells are connected in series side by side, a plurality of counter electrode layer partitions are arranged on the metal counter electrode at intervals, two sub-cells are arranged between every two adjacent counter electrode layer partitions, and a plurality of conductive layer partitions are arranged on the transparent conductive substrate at intervals. Two sub-cells are arranged between two adjacent conducting layer partitions, and the counter electrode layer partition and the conducting layer partition which are adjacent are located on the two sides of the same sub-cell respectively; and the plurality of sub-cells are formed by alternately arranging a plurality of formal-structure organic solar sub-cells and a plurality of trans-structure organic solar sub-cells. According to the invention, the high dependence of the traditional organic solar cell module preparation on the laser etching precision is overcome, and the module yield is obviously improved.

Description

Technical Field

[0001] The invention belongs to the technical field of organic solar cells, and in particular relates to a PN interactive organic solar cell assembly and a preparation method thereof. Background Art

[0002] Organic solar cells have the advantages of adjustable absorption spectrum, simple preparation, low cost and flexible preparation, and have become one of the hot spots of current research. With the continuous deepening of organic solar cell research, optimizing the structure and preparation process of large-area organic solar cell modules has become the key to the industrial application of such cells from the laboratory. At present, the structure of large-area organic solar cell modules is usually Z-type series connection, that is, the module is divided into multiple sub-cells by the conductive layer on the transparent substrate, and the adjacent two sub-cells are connected to the metal counter electrode of the other sub-cell through the conductive layer on the transparent substrate of one sub-cell to form a Z-shaped series connection. The preparation of the structural battery module requires multiple precise laser etching processes. For example, the Chinese patent with publication number CN117858588A discloses an organic solar cell module with ultra-narrow interconnection width and its preparation method. The preparation method of the application includes: P1 laser etching on the substrate of the transparent conductive film; P2 laser etching on the electron transport layer, organic absorption layer, and hole transport layer to form multiple P2 etching lines, and at the same time etching away the functional layer of the edge area of ​​the module; P4 and P5 etching after depositing the metal counter electrode.

[0003] The above-mentioned disclosed technical solution is also the main technical solution currently used for preparing large-area organic solar cell modules. The P2 laser etching in this solution is particularly important. It has high requirements on the power, etching rate and etching accuracy of the laser used, which leads to a high dependence on the laser. The electron transport layer, organic absorption layer and hole transport layer need to be completely etched away, and at the same time, the conductive layer of the substrate cannot be damaged. It is very easy to miss or over-etch during the etching process, thereby forming a short circuit or open circuit, reducing the yield rate of the module. At the same time, in order to realize the series connection of adjacent sub-cells, a large dead area is easily formed. Summary of the invention

[0004] In order to overcome the defects in the prior art, the present invention provides a PN interactive organic solar cell module and a preparation method thereof. The present invention overcomes the high dependence of traditional organic solar cell module preparation on laser etching accuracy and significantly improves the module yield.

[0005] To achieve one of the above purposes, the present invention adopts the following technical solution:

[0006] A PN interactive organic solar cell assembly comprises a metal counter electrode, a plurality of sub-cells connected in series in parallel, and a transparent conductive substrate, wherein a plurality of counter electrode layer partitions are arranged at intervals on the metal counter electrode, and two sub-cells are arranged between two adjacent counter electrode layer partitions; a plurality of conductive layer partitions are arranged at intervals on the transparent conductive substrate, and two sub-cells are arranged between two adjacent conductive layer partitions, and each conductive layer partition and its adjacent counter electrode layer partition are respectively located on both sides of the same sub-cell; and the plurality of sub-cells are composed of a plurality of regular structure organic solar sub-cells and a plurality of trans structure organic solar sub-cells arranged alternately.

[0007] Preferably, the spacing between two adjacent conductive layers is 10 mm to 30 mm.

[0008] Preferably, the transparent conductive substrate is composed of a substrate layer and a conductive layer, the sub-cells and the conductive layer partitions are both arranged on the conductive layer, the two sub-cells in two adjacent conductive layer partitions are connected in series through the conductive layer, and the sub-cells on both sides of a single conductive layer partition are connected in series through metal counter electrodes; wherein a counter electrode layer partition is arranged at the center of each two adjacent conductive layer partitions.

[0009] Preferably, the regular structure organic solar cell is composed of a top anode modification layer, a photoactive layer and a bottom cathode modification layer from top to bottom; the transverse structure organic solar cell is composed of a top cathode modification layer, a photoactive layer and a bottom anode modification layer from top to bottom.

[0010] To achieve the second objective above, the present invention provides a method for preparing a PN interactive organic solar cell module, comprising the following steps:

[0011] S1. Forming N conductive layer partitions on the conductive layer of the transparent conductive substrate to form a conductive layer that can accommodate 2N or 2N-1 sub-cells, where N is a positive integer greater than 1;

[0012] S2. Preparation of the bottom cathode modification layer in the formal structure organic solar cell: the bottom cathode modification layer is prepared on the charge collection area of ​​the conductive layer by using spray pyrolysis or atomic layer deposition or magnetron sputtering technology;

[0013] S3. Preparation of the bottom anode modification layer in the inverse structure organic solar cell: the bottom anode modification layer is prepared on the charge collection area of ​​the conductive layer by using spray pyrolysis or atomic layer deposition or magnetron sputtering technology;

[0014] S4, preparation of photoactive layer: preparing a photoactive layer on the surface of the bottom anode modification layer and the surface of the bottom cathode modification layer by spin coating or coating technology;

[0015] S5. Preparation of the top anode modification layer in the formal structure organic solar cell: preparing the top anode modification layer on the photoactive layer of the formal structure organic solar cell by using atomic layer deposition or vacuum evaporation or magnetron sputtering technology;

[0016] S6. Preparation of a top cathode modification layer in an inverse structure organic solar cell: preparing a top cathode modification layer on the photoactive layer of the inverse structure organic solar cell by using atomic layer deposition, vacuum evaporation or magnetron sputtering technology;

[0017] S7. Prepare a metal counter electrode: prepare a metal counter electrode on the surface of the top cathode modification layer and the surface of the top anode modification layer, and form N-1 counter electrode layer partitions on the metal counter electrode to obtain a PN interactive organic solar cell module.

[0018] There is no order of precedence between step S2 and step S3, and there is no order of precedence between step S5 and step S6.

[0019] Preferably, in step S7, a counter electrode layer partition is provided at the center of every two adjacent conductive layer partitions to ensure that the photoactive layer area of ​​each sub-cell is equivalent.

[0020] Preferably, in step S1, the transparent conductive substrate with the conductive layer partition formed is immersed in a potassium dichromate washing solution for 20 minutes, taken out and rinsed with clean water continuously, blown dry, immersed in the washing solution for 30 minutes of ultrasound, taken out and rinsed with clean water and deionized water, and then ultrasonically cleaned and dried with acetone and isopropanol in turn to remove dust, oil stains and surface organic matter on the surface of the transparent conductive substrate to ensure the cleanliness of the conductive layer.

[0021] Preferably, the conductive layer partitions and the counter electrode layer partitions are both strip-shaped.

[0022] Preferably, the method comprises the following steps:

[0023] S1. Etching N conductive layer partitions on the conductive layer of the transparent conductive substrate to form a conductive layer that can accommodate 2N or 2N-1 sub-batteries, where N is a positive integer greater than 1; and soaking the transparent conductive substrate with the conductive layer partitions in a potassium dichromate washing solution for 20 minutes, taking it out and rinsing it with clean water continuously, blowing it dry, soaking it in the washing solution for 30 minutes, taking it out and rinsing it with clean water and deionized water, and then ultrasonically cleaning and drying it with acetone and isopropanol in turn;

[0024] S2. Preparation of the bottom cathode modification layer in the formal structure organic solar cell: Place the transparent conductive substrate covered with the mask in step S1 into the thermal evaporation chamber and evacuate to 10 -4 Pa below The deposition rate was 15 nm thick to deposit a fullerene C60 cathode modification layer;

[0025] S3. Preparation of the bottom anode modification layer in the inverse structure organic solar cell: Place the transparent conductive substrate covered with the mask on a hot plate and heat it to 390°C for 20 minutes. Under oxygen protection, spray 6 ml of nickel oxide precursor solution evenly onto the transparent conductive substrate and keep it warm for 30 minutes to obtain a dense nickel oxide anode modification layer with a thickness of 20 nm.

[0026] S4, preparation of photoactive layer 6: dissolve the donor material PM6 with a concentration of 17.6 mg / ml and the acceptor material Y6 in chloroform at a mass ratio of 1:1.2, spin-coat at 3000 rpm on the surface of the transparent conductive substrate prepared with the C60 anode modification layer and the nickel oxide cathode modification layer for 30 seconds, and anneal at 100 degrees for 5 minutes to obtain an active layer film with a thickness of 110 nm;

[0027] S5. Preparation of the top anode modification layer in the formal structure organic solar cell: Place the transparent conductive substrate covered with the mask into the magnetron sputtering chamber and evacuate to 10 -4 Pa below, control Ar and O 2 The gas flow rate was adjusted, and the sputtering gas pressure was set to 0.3 Pa. After the gas pressure was stable, the RF sputtering power was set to 150 W, the baffle of the target material was opened, and sputtering was started. The sputtering thickness of the nickel oxide layer was controlled to be 20 nm, and a nickel oxide anode modification layer was obtained;

[0028] S6. Preparation of the top cathode modification layer in the inverse structure organic solar cell: Place the transparent conductive substrate covered with the mask into the thermal evaporation chamber and evacuate to 10 -4 Pa below The deposition rate was 15 nm thick to deposit a C60 cathode modification layer;

[0029] S7. Prepare the metal counter electrode: Place the transparent conductive substrate covered with the mask into the thermal evaporation chamber and evacuate to 10 -4 Pa below A 100 nm thick Ag metal counter electrode layer is deposited at a deposition rate; a counter electrode layer partition with a width of 40 μm is etched on the Ag counter electrode layer using a pulsed laser with a spot size of 25 μm, and a counter electrode layer partition is provided at the center of every two adjacent conductive layer partitions to obtain a PN interactive organic solar cell module.

[0030] Preferably, in step S7, the pulse energy is 10 μJ, the pulse frequency is 35 KHz, and the etching speed is 800 mm / s.

[0031] The advantages of the present invention are:

[0032] (1) The present invention utilizes the organic active layer material that can simultaneously have the characteristics of P-type and N-type charge transfer, and alternately prepares regular structure organic solar cells and trans-structure organic solar cells on a transparent conductive substrate. The connection between the transparent substrate conductive layer and the metal counter electrode layer is utilized to form a large-area series PN interactive organic solar cell module, which effectively avoids the cumbersome process of laser etching each sub-cell functional layer in the Z-type series connection of the traditional organic solar cell module, further simplifies the preparation process, and effectively reduces the dead area of ​​the battery module.

[0033] (2) The PN interactive organic solar cell module of the present invention can form a PN interactive organic solar cell module with a series structure by only setting a conductive layer partition on the conductive layer of the transparent conductive substrate and the metal counter electrode. It is not necessary to accurately etch the electron transport layer, the organic absorption layer, and the hole transport layer, thereby eliminating some laser etching steps. At the same time, it overcomes the high dependence of traditional organic solar cell module preparation on laser etching accuracy, significantly improving the module yield rate. The preparation process of the present invention is simple and easy to implement.

[0034] (3) The present invention uses a donor material PM6 and an acceptor material Y6 mixed in a mass ratio of 1:1.2 to prepare an organic solar cell photoactive layer, which can effectively absorb sunlight with a wavelength of 400nm to 900nm. An anode modification layer and a cathode modification layer are provided between the photoactive layer and the conductive layer, and between the photoactive layer and the metal counter electrode. The anode modification layer can effectively prevent electrons from passing through and transmit holes, and the cathode modification layer can effectively prevent holes from passing through and transmit electrons. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 This is a schematic diagram of the structure of a PN interactive organic solar cell assembly composed of 2N sub-cells of the present invention.

[0036] Figure 2 This is a schematic diagram of the structure of a PN interactive organic solar cell assembly composed of 2N-1 sub-cells of the present invention.

[0037] Figure 3 It is a schematic top view of the transparent conductive substrate after etching the conductive layer of the present invention.

[0038] Figure 4 It is a schematic diagram of the structure of the transparent conductive substrate after etching the conductive layer of the present invention, and 2N sub-batteries are arranged on the transparent conductive substrate.

[0039] Figure 5 It is a schematic diagram of the structure of the transparent conductive substrate after etching the conductive layer of the present invention, and 2N-1 sub-cells are arranged on the transparent conductive substrate.

[0040] Figure 6 It is a schematic top view of the metal counter electrode layer of the present invention.

[0041] Figure 7 It is a cross-sectional schematic diagram of the bottom anode modification layer and the bottom cathode modification layer of the PN interactive organic solar cell module of the present invention.

[0042] Figure 8 This is a current-voltage curve of the PN interactive organic solar cell module prepared in Example 1.

[0043] The meanings of the symbols in the figure are as follows:

[0044] 1-transparent conductive substrate, 11-substrate layer, 12-conductive layer, 2-conductive layer partition, 31-bottom anode modification layer, 32-top cathode modification layer, 41-bottom cathode modification layer, 42-top anode modification layer, 5-photoactive layer, 6-metal counter electrode, 7-counter electrode layer partition. DETAILED DESCRIPTION

[0045] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in the field without making creative work are within the scope of protection of the present invention.

[0046] like Figure 1-7 As shown, a PN interactive organic solar cell module comprises a transparent conductive substrate 1, a conductive layer 12, a bottom anode modification layer 31, a bottom cathode modification layer 41, a photoactive layer 5, a top cathode modification layer 32, a top anode modification layer 42 and a metal counter electrode 6. A plurality of conductive layer partitions 2 are arranged on the transparent conductive substrate 1, and two adjacent conductive layer partitions 2 contain two sub-cells. The module is composed of formal structure organic solar sub-cells and trans-structure organic solar sub-cells arranged alternately, and adjacent sub-cells are connected by the conductive layer 12 of the transparent conductive substrate 1 and the metal counter electrode 6 to form a series structure module.

[0047] Example 1

[0048] A method for preparing a PN interactive organic solar cell assembly comprises the following steps:

[0049] Step 1: Cut the 15Ω / □ FTO transparent conductive substrate 1 into a size of 60mm×60m, and use a 355nm laser to etch the conductive layer 12 to form 5 strip grooves with a width of 40μm. The strip grooves are the conductive layer partitions 2, and the top view and cross-sectional view are shown in FIG. Figure 3-Figure 5 As shown;

[0050] Step 2, soak the transparent conductive substrate 1 with the P1 etched line in a potassium dichromate cleaning solution for 20 minutes, take it out and rinse it with clean water continuously, blow it dry, soak it in the cleaning solution for 30 minutes, take it out and rinse it with clean water and deionized water, then ultrasonically clean and dry it with acetone and isopropanol in turn;

[0051] Step 3, preparation of the bottom anode modification layer 41 in the inverse structure organic solar cell: place the transparent conductive substrate 1 covered with the mask on a hot plate and heat it to 390° C. for 20 minutes. Under oxygen protection, 6 ml of nickel oxide precursor solution is evenly sprayed onto the transparent conductive substrate 1 and kept warm for 30 minutes to obtain a dense nickel oxide anode modification layer with a thickness of about 20 nm.

[0052] Step 4: Preparation of the bottom cathode modification layer 31 in the formal structure organic solar cell: Place the transparent conductive substrate 1 covered with the mask into the thermal evaporation chamber and evacuate to 10 -4 Pa below The deposition rate deposited a C60 cathode modification layer of about 15 nm thick;

[0053] Step 5, preparation of photoactive layer 5: dissolve the donor material PM6 with a concentration of 17.6 mg / ml and the acceptor material Y6 in chloroform in a mass ratio of 1:1.2, spin-coat at 3000 rpm on the transparent conductive substrate 1 prepared with the nickel oxide cathode modification layer and the C60 anode modification layer for 30 seconds, anneal at 100 degrees for 5 minutes to obtain an active layer film with a thickness of 110 nm.

[0054] Step 6: Preparation of the top anode modification layer 32 in the formal structure organic solar cell: Place the transparent conductive substrate 1 covered with the mask into the magnetron sputtering chamber and evacuate to 10 -4 Pa below, control Ar and O 2 The gas flow rate was adjusted, and the sputtering gas pressure was set to 0.3 Pa. After the gas pressure was stable, the RF sputtering power was set to 150 W, the baffle of the target material was opened, and sputtering was started to control the nickel oxide layer to sputter a nickel oxide anode modification layer with a thickness of 20 nm;

[0055] Step 7, preparation of the top cathode modification layer 42 in the inverse structure organic solar cell: put the transparent conductive substrate 1 covered with the mask into the thermal evaporation chamber, and evacuate to 10 -4 Pa below The deposition rate deposited a C60 cathode modification layer of about 15 nm thick;

[0056] Step 8: Prepare the metal counter electrode 6: Use vacuum evaporation coating technology to prepare the metal counter electrode 6 on the surface of the functional layer. Put the transparent conductive substrate 1 covered with the mask into the thermal evaporation chamber and evacuate to 10 -4 Pa below The deposition rate is 25 μm, and a pulse laser with a spot size of 25 μm is used to etch a P2 etching line with a width of 40 μm on the Ag counter electrode layer. The pulse energy is 10 μJ, the pulse frequency is 35 KHz, and the etching speed is 800 mm / s. The P2 etching line is the counter electrode layer partition 7.

[0057] A large-area PN interactive organic solar cell module with an area of ​​6 cm×6 cm obtained by Example 1 is obtained by connecting 10 sub-cells in series, and the aperture area of ​​the module is 30.35 cm 2 , effective area is 30.24cm 2 The active area width of a single sub-cell is 5.4mm, the dead zone width is only 40μm, and the geometric fill factor reaches 99.26%. Under the standard simulated light source of one sun (AM1.5), the open circuit voltage of its 10 sub-cells is measured to be 8.58V, and the short-circuit current density is 2.55mA / cm 2 , the filling factor is 0.755, the aperture area efficiency is 16.52%, and the IV curve is as follows Figure 8 shown.

[0058] The drawings of the present invention focus on illustrating the structural design of the transparent conductive substrate 1, the bottom anode modification layer 31, the bottom cathode modification layer 41, the photoactive layer 5, the top cathode modification layer 32, the top anode modification layer 42 and the metal counter electrode 6 of the PN interactive organic solar cell module, and do not involve the description of the drawings of the inactive area at the edge of the module and the module packaging area.

[0059] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A PN interactive organic solar cell module, characterized in that: The invention comprises a metal counter electrode (6) arranged in sequence from top to bottom, a plurality of sub-cells connected in parallel in series, and a transparent conductive substrate (1); a plurality of counter electrode layer partitions (7) are arranged at intervals on the metal counter electrode (6); two sub-cells are arranged between two adjacent counter electrode layer partitions (7); a plurality of conductive layer partitions (2) are arranged at intervals on the transparent conductive substrate (1); two sub-cells are arranged between two adjacent conductive layer partitions (2); and each conductive layer partition (2) and its adjacent counter electrode layer partition (7) are respectively located on two sides of the same sub-cell; and the plurality of sub-cells are composed of a plurality of regular structure organic solar sub-cells and a plurality of trans-structure organic solar sub-cells arranged alternately.

2. A PN interactive organic solar cell assembly according to claim 1, characterized in that: The distance between two adjacent conductive layer partitions (2) is 10 mm to 30 mm.

3. The PN interactive organic solar cell assembly according to claim 1, characterized in that: The transparent conductive substrate (1) is composed of a substrate layer (11) and a conductive layer (12); the sub-cells and the conductive layer partition (2) are both arranged on the conductive layer (12); the two sub-cells in two adjacent conductive layer partitions (2) are connected in series via the conductive layer (12); and the sub-cells on both sides of a single conductive layer partition (2) are connected in series via a metal counter electrode (6); wherein a counter electrode layer partition (7) is arranged at the center of each two adjacent conductive layer partitions (2).

4. The PN interactive organic solar cell assembly according to claim 1, characterized in that: The regular structure organic solar cell is composed of a top anode modification layer (32), a photoactive layer (5) and a bottom cathode modification layer (31) from top to bottom; the inverted structure organic solar cell is composed of a top cathode modification layer (42), a photoactive layer (5) and a bottom anode modification layer (41) from top to bottom.

5. A method for preparing a PN interactive organic solar cell module according to any one of claims 1 to 4, characterized in that: The steps include: S1. Forming N conductive layer partitions (2) on the conductive layer (12) of the transparent conductive substrate (1) to form a conductive layer (12) capable of accommodating 2N or 2N-1 sub-cells, wherein N is a positive integer greater than 1; S2. Preparation of the bottom cathode modification layer (31) in the formal structure organic solar cell: the bottom cathode modification layer (31) is prepared on the charge collection region of the conductive layer (12) by using spray pyrolysis or atomic layer deposition or magnetron sputtering technology; S3. Preparation of the bottom anode modification layer (41) in the inverse structure organic solar cell: the bottom anode modification layer (41) is prepared on the charge collection region of the conductive layer (12) by using spray pyrolysis or atomic layer deposition or magnetron sputtering deposition technology; S4, preparation of a photoactive layer (5): preparing a photoactive layer (5) on the surface of the bottom anode modification layer (31) and the surface of the bottom cathode modification layer (41) by spin coating or coating technology; S5. Preparation of a top anode modification layer (32) in a regular structure organic solar cell: preparing a top anode modification layer (32) on the photoactive layer (5) of the regular structure organic solar cell by using atomic layer deposition, vacuum evaporation or magnetron sputtering technology; S6. Preparation of a top cathode modification layer (42) in an inverse structure organic solar cell: preparing a top cathode modification layer (42) on the photoactive layer (5) of the inverse structure organic solar cell by using atomic layer deposition, vacuum evaporation or magnetron sputtering technology; S7. Preparation of a metal counter electrode (6): a metal counter electrode (6) is prepared on the surface of the top cathode modification layer (32) and the surface of the top anode modification layer (42), and N-1 counter electrode layer partitions (7) are formed on the metal counter electrode (6) to obtain a PN interactive organic solar cell module.

6. The method for preparing a PN interactive organic solar cell assembly according to claim 5, characterized in that: In step S7, a counter electrode layer partition (7) is provided at the center of every two adjacent conductive layer partitions (2).

7. The method for preparing a PN interactive organic solar cell assembly according to claim 5, characterized in that: In step S1, the transparent conductive substrate (1) formed with the conductive layer partition (2) is immersed in a potassium dichromate washing solution for 20 minutes, taken out and rinsed with clean water continuously, blown dry, immersed in the washing solution for 30 minutes by ultrasonic treatment, taken out and rinsed with clean water and deionized water, and then ultrasonically cleaned and dried with acetone and isopropanol in turn.

8. The method for preparing a PN interactive organic solar cell assembly according to claim 5, characterized in that: The conductive layer partition (2) and the counter electrode layer partition (7) are both in the shape of strips.

9. The method for preparing a PN interactive organic solar cell assembly according to claim 5, characterized in that: The steps include: S1. Etching N conductive layer partitions (2) on the conductive layer (12) of the transparent conductive substrate (1) to form a conductive layer (12) that can accommodate 2N or 2N-1 sub-cells, wherein N is a positive integer greater than 1; and soaking the transparent conductive substrate (1) formed with the conductive layer partitions (2) in a potassium dichromate washing solution for 20 minutes, taking it out and continuously rinsing it with clean water, blowing it dry, soaking it in the washing solution for ultrasonic treatment for 30 minutes, taking it out and rinsing it with clean water and deionized water, and then ultrasonically cleaning and drying it with acetone and isopropanol in turn; S2. Preparation of the bottom cathode modification layer (31) in the formal structure organic solar cell: Place the transparent conductive substrate (1) covered with the mask in step S1 into a thermal evaporation chamber and evacuate the chamber to 10 -4 Pa below The deposition rate deposited a C60 cathode modification layer with a thickness of 15 nm; S3. Preparation of the bottom anode modification layer (41) in the inverse structure organic solar cell: Place the transparent conductive substrate (1) covered with the mask on a hot plate and heat it to 390° C. for 20 minutes. Under oxygen protection, spray 6 ml of nickel oxide precursor solution evenly onto the transparent conductive substrate (1) and keep it warm for 30 minutes to obtain a dense nickel oxide anode modification layer with a thickness of 20 nm. S4, preparation of photoactive layer 6: dissolving donor material PM6 with a concentration of 17.6 mg / ml and acceptor material Y6 in chloroform at a mass ratio of 1:1.2, spin coating at 3000 rpm on the surface of transparent conductive substrate (1) prepared with C60 anode modification layer and nickel oxide cathode modification layer for 30 seconds, annealing at 100 degrees for 5 minutes, and obtaining an active layer film with a thickness of 110 nm; S5. Preparation of the top anode modification layer (32) in the formal structure organic solar cell: Place the transparent conductive substrate (1) covered with the mask into the magnetron sputtering chamber and evacuate to 10 -4 Pa, control the flow rate of Ar and O2, set the sputtering pressure to 0.3Pa, set the RF sputtering power to 150W after the pressure stabilizes, open the baffle of the target material, start sputtering, control the sputtering thickness of the nickel oxide layer to 20nm, and obtain a nickel oxide anode modification layer; S6. Preparation of the top cathode modification layer (42) in the inverse structure organic solar cell: Place the transparent conductive substrate (1) covered with the mask into a thermal evaporation chamber and evacuate the chamber to 10 -4 Pa below The deposition rate was 15 nm thick to deposit a C60 cathode modification layer; S7, preparing the metal counter electrode (6): placing the transparent conductive substrate (1) covered with the mask into a thermal evaporation chamber, and evacuating the chamber to 10 -4 Pa below A 100 nm thick Ag metal counter electrode layer is deposited at a deposition rate; a counter electrode layer partition (7) with a width of 40 μm is etched on the Ag counter electrode layer using a pulse laser with a spot size of 25 μm, and a counter electrode layer partition (7) is arranged at the center of every two adjacent conductive layer partitions (2), thereby obtaining a PN interactive organic solar cell module.

10. The method for preparing a PN interactive organic solar cell assembly according to claim 5, characterized in that: In step S7, the pulse energy is 10 μJ, the pulse frequency is 35 KHz, and the etching speed is 800 mm / s.

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