Organic photovoltaic thin film battery assembly structure and preparation method thereof

Abstract

The invention discloses an organic photovoltaic thin film battery assembly structure and a preparation method thereof. The preparation method comprises the following steps: etching a P1 wire slot on a transparent substrate, cutting off a bottom electrode layer, and then carrying out wet slit coating or dry vacuum coating; for a forward device, preparing a hole transport layer and an organic active layer in sequence; for a reverse device, preparing an electron transport layer and an organic active layer in sequence; a P1.5 wire duct and a P2.5 wire duct are sequentially etched on one side of the P1 wire duct, then slit coating or vacuum coating is carried out, and an electron transport layer is prepared for a forward device; for a reverse device, preparing a hole transport layer; a P2 trunking is etched in the middle position in the P1.5 trunking, and vacuum coating or coating of a top electrode layer is carried out; a P3 wire duct is etched at the middle position in the P2.5 wire duct, and an electron transport layer or a hole transport layer is used as a buffer layer, so that the organic active layer or the top electrode is prevented from being corroded, carrier recombination, ion migration and water-oxygen diffusion are blocked, and the risk of decomposition of the organic active layer is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of photovoltaic thin-film batteries, and in particular to an organic photovoltaic thin-film battery component structure and a preparation method thereof. Background Art

[0002] Organic photovoltaic (OPV) thin-film solar cells are favored by a large number of scientific researchers due to their low cost, light texture, high flexibility, and easy large-area flexible preparation. Among them, heterojunction solar cells based on organic conjugated materials mix donor materials and acceptor materials together to form an interconnected network structure, which can effectively increase the contact area and thus improve the separation efficiency of excitons, greatly improving the energy conversion efficiency of organic solar cells, and has become an important milestone in the development of organic solar cells.

[0003] Organic photovoltaic (OPV) thin-film cells are a new type of solar cell technology. Their structure primarily consists of the following components: a bottom electrode (such as Ag, ITO), a hole transport layer (such as PEDOT:PSS), an active layer (organic polymer donor PM6 / non-fullerene electron acceptor L8-BO), an electron transport layer (such as zinc oxide, PFN-Br), a buffer layer (SnOx), and a top electrode (such as Ag, ITO thin film). Etching and scribing, a crucial step in component formation, divides the cell into multiple subcells and connects them in series. The P1 etch line cuts through the bottom electrode, the P2 etch line runs from the active layer to the bottom electrode, and the P3 etch line runs from the top electrode to the active layer.

[0004] Specifically, the specific steps of the etching method in the prior art are: first, laser etching P1 line grooves on the ITO layer of the transparent conductive glass substrate is used to form the transparent conductive ITO layer into several sub-units; then, a hole (electron) transport layer, an organic active layer and an electron (hole) transport layer are sequentially prepared on the transparent bottom electrode, and a laser is used to etch P2 line grooves on one side of the P1 line grooves to form the hole (electron) transport layer, the organic active layer and the electron (hole) transport layer into various sub-units; then, a top electrode layer is prepared on the electron (hole) transport layer, and finally, a laser is used to etch P3 line grooves on one side of the P2 line grooves to form various sub-units of the top electrode layer, and the various sub-units are connected in series, thereby forming an organic solar cell module. Clearly, existing methods fail to consider the stability of organic photovoltaic (OPV) solar cell modules. After laser P2 and P3 etching, the cross-sections of the organic active layer within the P2 and P3 grooves are exposed to air, making them susceptible to damage from atmospheric water and oxygen. This can cause the active layer to separate, reducing the performance and lifespan of the OPV device. Therefore, effectively improving the performance and stability of OPV cells and preventing damage to the active layer has become a pressing issue within the industry.

[0005] In order to solve the above technical problems, the present invention proposes an organic photovoltaic thin-film battery assembly structure and a preparation method thereof. Summary of the Invention

[0006] In response to the defects in the prior art, the present invention aims to provide an organic photovoltaic thin-film battery module structure and its preparation method, which comprises etching a P1 line groove on a transparent substrate, cutting off the bottom electrode layer, and then performing wet slit coating or dry vacuum coating; for a forward device, sequentially preparing a hole transport layer and an organic active layer; for a reverse device, sequentially preparing an electron transport layer and an organic active layer; etching a P1.5 line groove on one side of the P1 line groove, and then etching a P2.5 line groove on the other side of the P1.5 line groove, and then performing slit coating or vacuum coating, for a forward device, preparing an electron transport layer; for a reverse device, preparing a hole transport layer; etching a P2 line groove in the middle position within the P1.5 line groove, and vacuum coating or coating a top electrode layer; etching a P3 line groove in the middle position within the P2.5 line groove. The present invention utilizes a transport layer (passivation layer) as a protective layer to prevent the organic active layer from being corroded by the top electrode layer, while blocking carrier recombination, ion migration, and water and oxygen diffusion, reducing the risk of decomposition of the organic absorption layer, and extending the service life of the module structure.

[0007] Specifically, the technical problem to be solved by the present invention is to address the deficiencies in the above-mentioned prior art. In the first aspect, a method for preparing an organic photovoltaic thin-film battery assembly is proposed. The organic photovoltaic thin-film battery assembly includes a transparent substrate, a bottom electrode layer, a hole transport layer, an organic active layer, an electron transport layer and a top electrode layer arranged in sequence from bottom to top, which is called a forward device; or a transparent substrate, a bottom electrode layer, an electron transport layer, an organic active layer, a hole transport layer and a top electrode layer arranged in sequence from bottom to top, which is called a reverse device.

[0008] The preparation method includes the following steps: Step 1: laser etching a P1 line groove on a transparent substrate with a bottom electrode layer sputtered on the surface, cutting the film layer of the bottom electrode layer, and then wet coating with a coater or vacuum coating to prepare an electron transport layer and an organic active layer; for a forward device, the hole transport layer and the organic active layer are prepared in sequence; for a reverse device, the electron transport layer and the organic active layer are prepared in sequence.

[0009] Step 2: Laser-etch a P1.5 slot on one side of the P1 slot, exposing the bottom electrode layer through the P1.5 slot. Then, sequentially etch a P2.5 slot on one side of the P1.5 slot, and after exposing the bottom electrode layer through the P2.5 slot, perform slit coating or vacuum coating to prepare a transport layer. For a forward device, prepare an electron transport layer; for a reverse device, prepare a hole transport layer. The P1.5 slot and the P2.5 slot have a certain spacing.

[0010] Step 3: In the middle of the P1.5 slot, laser etch the P2 slot to expose the bottom electrode layer, and then perform slit coating or vacuum coating to prepare a top electrode layer.

[0011] Step 4: In the middle position of the P2.5 line groove, laser etch the P3 line groove to expose the film layer of the bottom electrode layer, thereby obtaining the organic photovoltaic thin film battery assembly.

[0012] Preferably, the transparent substrate comprises glass and an organic film, wherein the material of the organic film is any one of thermoplastic polyurethane (TPU), polyimide (PI), polyethylene terephthalate (PET) or polyethylene naphthalate (PEN).

[0013] Preferably, the material of the electron transport layer is any one of a metal oxide or an organic compound, the metal oxide includes tin oxide and zinc oxide, and the organic compound includes poly (9,9-bis (3'- (N, N-dimethyl) -N-ethylaminopropyl-2,7-fluorene) -alt-2,7- (9,9-dioctylfluorene)) dibromide (PFN-Br), poly (9,9-bis (3'- (N, N-dimethyl) -N-ethylaminopropyl-2,7-fluorene) -alt-2,7- (9,9-dioctylfluorene)) (PFN), 2,9-bis (3- ((3- (dimethylamino) propyl) amino) propyl) - 3,3'-(1,3,8,10-tetraanthraquinone[2,1,9-DEF:6,5,10-D'E'F']diisoquinoline (PDINN), N,N'-bis[3-(dimethylamino)propyl]perylene-3,4,9,10-tetracarboxylic acid diimide (PDIN), etc.

[0014] Preferably, the material of the organic active layer is divided into a donor and an acceptor, and is any one of an oligothiophene material, a triphenylamine material, a benzodithiophene material or a diketopyrrolopyrrole material.

[0015] Preferably, the material of the hole transport layer is any one of metal oxides or organic compounds, wherein the organic compounds include poly(3,4-ethylenedioxythiophene)-polystyrene sulfonic acid (PEDOT:PSS), (2-(9H-carbazol-9-yl)ethyl)phosphonic acid (2PACz), etc., and the metal oxides include molybdenum oxide, vanadium oxide, nickel oxide, etc.

[0016] Preferably, the material of the top electrode layer is at least one of metal, conductive nanomaterial, or a material with a multilayer structure, wherein the metal material includes Ag, Al, Cu, and Au; the conductive nanomaterial includes metal nanowires and nanoparticle slurry.

[0017] Preferably, the material of the bottom electrode layer includes any one of an indium tin oxide film, a silver nanowire film, and a semi-transparent silver film.

[0018] In a second aspect, the present invention provides an organic photovoltaic thin-film battery module structure, which is manufactured using the above-mentioned method for preparing an organic photovoltaic thin-film battery module.

[0019] In a third aspect, a method for preparing an organic photovoltaic thin-film battery assembly is proposed, which includes the following steps: Step 1: laser etching P1 grooves on glass with an indium tin oxide (ITO) film layer sputtered on the surface, scratching the ITO film layer and performing a slit coating operation with a coater, and sequentially coating a hole transport layer and an active layer on the glass surface with the P1 grooves, and then annealing.

[0020] Step 2: Laser-etch a P1.5 slot on one side of the P1 slot, exposing the ITO film layer. Then, etch a P2.5 slot on one side of the P1.5 slot, exposing the ITO film layer. Then, slit-coat the electron transport layer and the passivation layer in sequence. The P1.5 slot and the P2.5 slot have a certain distance between them.

[0021] Step 3: In the middle of the P1.5 slot, laser etch the P2 slot to expose the ITO film layer, and then use vacuum coating equipment to plate the copper electrode layer.

[0022] Step 4: Laser-etch the P3 line groove in the middle of the P2.5 line groove to expose the ITO film layer, thereby obtaining the organic photovoltaic thin-film battery assembly.

[0023] Preferably, before step 1, the following treatment is performed: the glass with an indium tin oxide (ITO) film layer sputtered on the surface is cleaned with a detergent, deionized water, acetone, isopropyl alcohol and ethanol in sequence with ultrasonic oscillation for 30 minutes, dried with a nitrogen flow, and then treated with ultraviolet and ozone plasma for 5 minutes before use.

[0024] Preferably, the active layer solution is prepared by weighing the organic polymer donor PM6 and the non-fullerene electron acceptor L8-BO in a weight ratio of 1:1.2, and adding a certain volume of toluene solvent to prepare an active layer solution with a concentration of 7 mg / ml.

[0025] Preferably, the hole transport layer solution is prepared by adding pure water in an equal volume ratio to the PEDOT:PSS solution and stirring at room temperature for one to two hours.

[0026] Preferably, a methanol dispersion of tin oxide (SnOx) nanoparticles is used as the solution for the electron transport layer.

[0027] Preferably, the annealing treatment is performed at 100° C. for 10 minutes.

[0028] Preferably, the width of the P1.5 wire groove and the P2.5 wire groove are both 100-200 microns.

[0029] Preferably, the width of the P2 slot and the P3 slot are both 50-80 microns.

[0030] Preferably, the thickness of the tin oxide electron transport layer film is 20 nm, and the thickness of the copper electrode is 100 nm.

[0031] In a fourth aspect, an organic photovoltaic thin-film battery module structure is proposed, which is manufactured using the above-mentioned method for preparing an organic photovoltaic thin-film battery module.

[0032] Compared with the prior art, the positive effects of the present invention are: the preparation method of the organic photovoltaic thin-film battery module in the present invention can prevent the organic active layer from being corroded by the top electrode layer by utilizing the electron transport layer (passivation layer) as a protective layer, while blocking carrier recombination, ion migration, and water and oxygen diffusion, reducing the risk of decomposition of the organic absorption layer, and extending the service life of the organic photovoltaic (OPV) battery module structure; moreover, it can also prevent the material of the organic absorption layer from direct contact with the electrode layer and from being exposed to the air; at the same time, it can also avoid the phenomenon of uneven cross-section, curling, and peeling when laser etching the P2 line groove and the P3 etching groove, thereby reducing the risk of short circuit between the neutron cells in the module and improving the efficiency and stability of the organic photovoltaic battery module structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 This is a process structure diagram after the etching of the P1.5 line slot and the P2.5 line slot in the present invention is completed.

[0034] Figure 2 This is a process structure diagram after the buffer layer coating is completed in the present invention.

[0035] Figure 3 This is a process structure diagram after the P2 line groove etching is completed in the present invention.

[0036] Figure 4 This is a process structure diagram after the tin oxide buffer layer film and copper electrode plating are completed in the present invention.

[0037] Figure 5 This is a process structure diagram after the P3 line groove etching is completed in the present invention.

[0038] Figure 6 This is the overall process structure diagram of the present invention.

[0039] The markings in the accompanying drawings are: 1-glass substrate, 2-ITO film layer, 3-hole transport layer-active layer, 4-electron transport layer-passivation layer, 5-electrode layer. DETAILED DESCRIPTION

[0040] The following combination Figure 1-6 The present invention is further described with specific embodiments.

[0041] Currently, the specific steps of the etching and scribing method for organic photovoltaic (OPV) thin-film cells in the prior art are as follows: first, laser-etching P1 grooves in the ITO layer of a transparent conductive glass substrate forms the transparent conductive ITO layer into several subunits; then, sequentially forming a first charge transport layer, an organic absorption layer, and a second charge transport layer on the transparent bottom electrode; then, using a laser, etching P2 grooves on one side of the P1 grooves to form the first charge transport layer, the organic absorption layer, and the second charge transport layer into subunits; then, forming a top electrode layer on the second charge transport layer; and finally, laser-etching P3 grooves on one side of the P2 grooves to form the top electrode layer into subunits, which are then connected in series to form an organic solar cell module. Clearly, this prior art method fails to consider the stability of the organic photovoltaic (OPV) solar cell module. After laser P2 and P3 etching, the cross-sections of the organic active layer within the P2 and P3 grooves are exposed to air and are easily damaged by water and oxygen in the air, causing the active layers to separate sequentially, thereby reducing the performance and lifespan of the organic OPV photovoltaic device.

[0042] In order to effectively improve the performance and stability of organic photovoltaic (OPV) cells and prevent the active layer from being damaged, the present invention proposes an organic photovoltaic thin-film cell assembly structure and a preparation method thereof.

[0043] Example 1: The term "forward device" refers to a device in which the top electrode is in direct contact with the electron transport layer, and the bottom electrode is in direct contact with the hole transport layer.

[0044] A method for preparing an organic photovoltaic thin-film battery assembly is proposed. The organic photovoltaic thin-film battery assembly includes a transparent substrate, a bottom electrode layer, a hole transport layer, an organic active layer, an electron transport layer and a top electrode layer arranged in sequence from bottom to top, which is called a forward device.

[0045] The preparation method includes the following steps: Step 1: laser etching P1 line grooves on a transparent substrate with a bottom electrode layer sputtered on the surface, cutting the film layer of the bottom electrode layer and performing a slit coating operation with a coater, and then wet coating or vacuum coating the surface of the transparent substrate with the P1 line grooves carved thereon; preparing a hole transport layer and an organic active layer.

[0046] Step 2: Laser-etch a P1.5 groove on one side of the P1 groove, and the P1.5 groove exposes the film layer of the bottom electrode layer. Then, a P2.5 groove is etched on one side of the P1.5 groove, and after the P2.5 groove exposes the film layer of the bottom electrode layer, wet coating or vacuum plating is performed to prepare an electron transport layer-buffer layer; wherein, the P1.5 groove and the P2.5 groove have a certain distance.

[0047] Step 3: In the middle of the P1.5 slot or on the side away from the dead zone, laser etch the P2 slot to expose the bottom electrode layer, and then vacuum evaporate a top electrode layer.

[0048] Step 4: At the middle position of the P2.5 line groove or on the side away from the dead zone, laser-etch the P3 line groove to expose the film layer of the bottom electrode layer, thereby obtaining the organic photovoltaic thin film battery assembly.

[0049] The transparent substrate includes glass and an organic film, wherein the material of the organic film is any one of thermoplastic polyurethane elastomer (TPU), polyimide (PI), polyethylene terephthalate (PET) or polyethylene naphthalate (PEN).

[0050] The material of the electron transport layer is any one of metal oxides or organic compounds, the metal oxides include tin oxide and zinc oxide, the organic compounds include poly (9,9-bis (3'- (N, N-dimethyl) -N-ethylaminopropyl -2,7-fluorene) -alt-2,7- (9,9-dioctylfluorene)) dibromide (PFN-Br), poly (9,9-bis (3'- (N, N-dimethyl) -N-ethylaminopropyl -2,7-fluorene) -alt-2,7- (9,9-dioctylfluorene)) (PFN), 2,9-bis (3- ((3- (dimethylamino) propyl) amino) propyl) - 3,3'-(1,3,8,10-tetraanthraquinone[2,1,9-DEF:6,5,10-D'E'F']diisoquinoline (PDINN), N,N'-bis[3-(dimethylamino)propyl]perylene-3,4,9,10-tetracarboxylic acid diimide (PDIN), etc.

[0051] The material of the organic active layer is divided into a donor and an acceptor, and is any one of an oligothiophene material, a triphenylamine material, a benzodithiophene material or a diketopyrrolopyrrole material.

[0052] The material of the hole transport layer is any one of metal oxides or organic compounds, wherein the organic compound includes poly(3,4-ethylenedioxythiophene)-polystyrene sulfonic acid (PEDOT:PSS), (2-(9H-carbazol-9-yl)ethyl)phosphonic acid (2PACz), etc., and the metal oxide includes molybdenum oxide, vanadium oxide, nickel oxide, etc.

[0053] The material of the top electrode layer is at least one of metal, conductive nanomaterial, or a material with a multilayer structure, wherein the metal material includes Ag, Al, Cu, and Au; the conductive nanomaterial includes metal nanowires and nanoparticle slurry.

[0054] The material of the bottom electrode layer includes any one of an indium tin oxide film, a silver nanowire film, and a semi-transparent silver film.

[0055] Example 2: The term "inverse device" refers to a device in which the top electrode is in direct contact with the hole transport layer, and the bottom electrode is in direct contact with the electron transport layer.

[0056] A method for preparing an organic photovoltaic thin-film battery assembly is proposed. The organic photovoltaic thin-film battery assembly includes a transparent substrate, a bottom electrode layer, an electron transport layer, an organic active layer, a hole transport layer and a top electrode layer arranged in sequence from bottom to top, which is called an inverted device.

[0057] The preparation method includes the following steps: Step 1: laser etching P1 line grooves on a transparent substrate with a bottom electrode layer sputtered on the surface, cutting the film layer of the bottom electrode layer and performing a slit coating operation with a coater, and then wet coating or vacuum coating the surface of the transparent substrate with the P1 line grooves carved thereon; preparing an electron transport layer and an organic active layer.

[0058] Step 2: Laser-etching a P1.5 groove on one side of the P1 groove, and exposing the bottom electrode layer through the P1.5 groove; then etching a P2.5 groove on one side of the P1.5 groove, and exposing the bottom electrode layer through the P2.5 groove, wet coating or vacuum plating is performed to prepare a hole transport layer; wherein, the P1.5 groove and the P2.5 groove have a certain distance between them.

[0059] Step 3: In the middle of the P1.5 slot or on the side away from the dead zone, laser etch the P2 slot to expose the bottom electrode layer, and then vacuum evaporate a top electrode layer.

[0060] Step 4: At the middle position of the P2.5 line groove or on the side away from the dead zone, laser-etch the P3 line groove to expose the film layer of the bottom electrode layer, thereby obtaining the organic photovoltaic thin film battery assembly.

[0061] The transparent substrate includes glass and an organic film, wherein the material of the organic film is any one of thermoplastic polyurethane elastomer (TPU), polyimide (PI), polyethylene terephthalate (PET) or polyethylene naphthalate (PEN).

[0062] The material of the electron transport layer is any one of metal oxides or organic compounds, the metal oxides include tin oxide and zinc oxide, the organic compounds include poly (9,9-bis (3'- (N, N-dimethyl) -N-ethylaminopropyl -2,7-fluorene) -alt-2,7- (9,9-dioctylfluorene)) dibromide (PFN-Br), poly (9,9-bis (3'- (N, N-dimethyl) -N-ethylaminopropyl -2,7-fluorene) -alt-2,7- (9,9-dioctylfluorene)) (PFN), 2,9-bis (3- ((3- (dimethylamino) propyl) amino) propyl) - 3,3'-(1,3,8,10-tetraanthraquinone[2,1,9-DEF:6,5,10-D'E'F']diisoquinoline (PDINN), N,N'-bis[3-(dimethylamino)propyl]perylene-3,4,9,10-tetracarboxylic acid diimide (PDIN), etc.

[0063] The material of the organic active layer is divided into a donor and an acceptor, and is any one of an oligothiophene material, a triphenylamine material, a benzodithiophene material or a diketopyrrolopyrrole material.

[0064] The material of the hole transport layer is any one of metal oxides or organic compounds, wherein the organic compound includes poly(3,4-ethylenedioxythiophene)-polystyrene sulfonic acid (PEDOT:PSS), (2-(9H-carbazol-9-yl)ethyl)phosphonic acid (2PACz), etc., and the metal oxide includes molybdenum oxide, vanadium oxide, nickel oxide, etc.

[0065] The material of the top electrode layer is at least one of metal, conductive nanomaterial, or a material with a multilayer structure, wherein the metal material includes Ag, Al, Cu, and Au; the conductive nanomaterial includes metal nanowires and nanoparticle slurry.

[0066] The material of the bottom electrode layer includes any one of an indium tin oxide film, a silver nanowire film, and a semi-transparent silver film.

[0067] Example 3: The specific method is as follows: first, the glass with indium tin oxide (ITO) on the surface is cleaned with a detergent, deionized water, acetone, isopropyl alcohol and ethanol in sequence with ultrasonic oscillation for 30 minutes, then dried with a nitrogen flow, and then treated with ultraviolet and ozone plasma for 5 minutes before use.

[0068] Then, the organic polymer donor PM6 and the non-fullerene electron acceptor L8-BO were weighed at a weight ratio of 1:1.2, and a certain volume of toluene solvent was added to prepare an active layer solution with a concentration of 7 mg / ml.

[0069] The hole transport layer solution is prepared by adding pure water in an equal volume ratio to the PEDOT:PSS solution and stirring at room temperature for one to two hours.

[0070] A methanol dispersion of tin oxide (SnOx) nanoparticles was used as the electron transport layer solution.

[0071] Then the ITO glass is taken out for laser P1 scribing. After the ITO film layer is cut, a slit coating operation is performed using a coating machine. The prepared hole transport layer solution and active layer solution are sequentially coated on the surface of the ITO glass with P1 engraved by slit coating. The hole transport layer and active layer are coated in turn; and annealing treatment is carried out for 10 minutes; then a laser etching line is performed on one side of the P1 line with a width of 100-200 microns (subsequent description is defined as P1.5 and P2.5 process). The P1.5 etching line exposes the ITO bottom electrode, and then the P2.5 laser etching line is etched on the P1.5 side to expose the ITO bottom electrode. The resulting process structure diagram is shown as follows: Figure 1 As shown, it includes a glass substrate 1, an ITO film layer 2, and a hole transport layer-active layer 3.

[0072] Then the electron transport layer and passivation layer are slit coated. After the coating is completed, the obtained process structure diagram is as follows Figure 2 As shown; it includes a glass substrate 1, an ITO film layer 2, a hole transport layer-active layer 3, an electron transport layer-passivation layer 4, and a top electrode layer.

[0073] In the middle of the P1.5 etching line interval or away from the dead zone, a 50-80 micron wide laser P2 etching line is performed to expose the ITO bottom electrode. The resulting process structure is shown in the figure below. Figure 3 shown.

[0074] Then, a 100nm thick copper electrode was plated using vacuum coating equipment. The resulting process structure is shown in the figure below. Figure 4 As shown; it includes a glass substrate 1, an ITO film layer 2, a hole transport layer-active layer 3, an electron transport layer-passivation layer 4, and a copper electrode layer 5.

[0075] Then, in the middle of the P2.5 etching line interval or away from the dead zone, a 50-80 micron wide laser P3 etching line is performed to expose the ITO bottom electrode. The resulting process structure diagram is shown in the figure below. Figure 5 shown.

[0076] From Figure 6As shown in the overall process structure diagram, the organic photovoltaic thin-film battery module structure and its preparation method in the present invention use the electron transport layer and the passivation layer as protective layers, which can prevent the organic active layer from being corroded by the top electrode layer, and at the same time block carrier recombination, ion migration, and water and oxygen diffusion, reduce the risk of decomposition of the organic absorption layer, and extend the service life of the organic OPV module structure; moreover, it can also prevent the material of the organic absorption layer from direct contact with the electrode layer and not be exposed to the air; at the same time, it can also avoid the uneven cross-section, curling, and peeling when laser etching the P2 line groove and the P3 etching groove, reduce the risk of short circuit between the neutron cells in the module, and improve the efficiency and stability of the organic photovoltaic module structure.

[0077] Compared with the prior art, the positive effects of the present invention are: the preparation method of the organic photovoltaic thin-film battery module in the present invention uses the electron transport layer and the passivation layer as protective layers, which can prevent the organic active layer from being corroded by the top electrode layer, and at the same time block carrier recombination, ion migration, and water and oxygen diffusion, thereby reducing the risk of decomposition of the organic absorption layer and extending the service life of the organic photovoltaic (OPV) battery module structure; moreover, it can also prevent the material of the organic absorption layer from direct contact with the electrode layer and from being exposed to the air; at the same time, it can also avoid the phenomenon of uneven cross-section, curling, and peeling when laser etching the P2 line groove and the P3 etching groove, thereby reducing the risk of short circuit between the sub-cells in the module and improving the efficiency and stability of the organic photovoltaic battery module structure.

[0078] In summary, the above only reflects the preferred technical solutions of the present invention. Any changes that may be made to certain parts thereof by those skilled in the art all reflect the principles of the present invention and should fall within the technical scope of the present invention.

Claims

1. A method for preparing an organic photovoltaic thin film battery assembly, characterized in that: The organic photovoltaic thin film battery assembly includes a transparent substrate, a bottom electrode layer, a hole transport layer, an organic active layer, an electron transport layer and a top electrode layer arranged in sequence from bottom to top, which is called a forward device; or a transparent substrate, a bottom electrode layer, an electron transport layer, an organic active layer, a hole transport layer and a top electrode layer arranged in sequence from bottom to top, which is called a reverse device; the preparation method includes the following steps: step 1: laser etching P1 line grooves on the transparent substrate with a bottom electrode layer sputtered on the surface, cutting off the film layer of the bottom electrode layer, and then wet coating with a coater or vacuum coating to prepare the electron transport layer and the organic active layer; for the forward device, the hole transport layer and the organic active layer are prepared in sequence; for the reverse device, the electron transport layer and the organic active layer are prepared in sequence; step 2: in the P1 line grooves Laser etching a P1.5 groove on one side of the P1.5 groove, and the P1.5 groove exposes the film layer of the bottom electrode layer, and then sequentially etching a P2.5 groove on one side of the P1.5 groove, and after the P2.5 groove exposes the film layer of the bottom electrode layer, slit coating or vacuum coating is performed to prepare a transport layer; for a forward device, an electron transport layer is prepared; for a reverse device, a hole transport layer is prepared; wherein the P1.5 groove and the P2.5 groove have a certain spacing; step three: in the middle position of the P1.5 groove, laser etching the P2 groove and exposing the film layer of the bottom electrode layer, and then slit coating or vacuum coating is performed to prepare a top electrode layer; step four: in the middle position of the P2.5 groove, laser etching the P3 groove and exposing the film layer of the bottom electrode layer, thus obtaining the organic photovoltaic thin film battery component.

2. The method for preparing an organic photovoltaic thin film battery assembly according to claim 1, wherein: in, The transparent substrate includes glass and an organic film, wherein the material of the organic film is any one of thermoplastic polyurethane elastomer (TPU), polyimide (PI), polyethylene terephthalate (PET) or polyethylene naphthalate (PEN).

3. The method for preparing an organic photovoltaic thin film battery assembly according to claim 1, wherein: in, The material of the electron transport layer is any one of metal oxides or organic compounds, the metal oxides include tin oxide and zinc oxide, the organic compounds include poly (9,9-bis (3'- (N, N-dimethyl) -N-ethylaminopropyl -2,7-fluorene) -alt-2,7- (9,9-dioctylfluorene)) dibromide (PFN-Br), poly (9,9-bis (3'- (N, N-dimethyl) -N-ethylaminopropyl -2,7-fluorene) -alt-2,7- (9,9-dioctylfluorene)) (PFN), 2,9-bis (3- ((3- (dimethylamino) propyl) amino) propyl) - 3,3'-(1,3,8,10-tetraanthraquinone[2,1,9-DEF:6,5,10-D'E'F']diisoquinoline (PDINN), N,N'-bis[3-(dimethylamino)propyl]perylene-3,4,9,10-tetracarboxylic acid diimide (PDIN).

4. The method for preparing an organic photovoltaic thin film battery assembly according to claim 1, wherein: The material of the organic active layer is divided into a donor and an acceptor, and is any one of an oligothiophene material, a triphenylamine material, a benzodithiophene material or a diketopyrrolopyrrole material.

5. The method for preparing an organic photovoltaic thin film battery assembly according to claim 1, wherein: The material of the hole transport layer is any one of metal oxides or organic compounds, wherein the organic compound includes poly(3,4-ethylenedioxythiophene)-polystyrene sulfonic acid (PEDOT:PSS) and (2-(9H-carbazol-9-yl)ethyl)phosphonic acid (2PACz), and the metal oxide includes molybdenum oxide, vanadium oxide, and nickel oxide.

6. The method for preparing an organic photovoltaic thin-film battery assembly according to claim 1, wherein: The material of the top electrode layer is at least one of metal, conductive nanomaterial, or a material with a multilayer structure. Metal materials include Ag, Al, Cu, and Au; conductive nanomaterials include metal nanowires and nanoparticle slurries.

7. The method for preparing an organic photovoltaic thin film battery assembly according to claim 1, wherein: The material of the bottom electrode layer includes any one of an indium tin oxide film, a silver nanowire film, and a semi-transparent silver film.

8. An organic photovoltaic thin film battery assembly structure, characterized in that: The organic photovoltaic thin film battery assembly is manufactured using the preparation method of any one of claims 1 to 7.

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