A non-scribing perovskite solar cell module and its preparation method

Abstract

The present invention discloses a perovskite solar cell module without scribe lines and a preparation method thereof; the steps include: S1, providing a transparent substrate, cleaning the substrate, and placing a first mask plate thereon; S2, plating a transparent conductive material on the substrate, removing the mask plate, and forming a transparent conductive film; forming a first mask area around the substrate and a second mask area in the middle; S3, placing a second and a third mask plate on the transparent conductive film, vacuum plating, and forming a hole transport film; S4, drying the hole transport film, and plating a perovskite absorption layer thereon; S5, drying the perovskite absorption layer, and plating an electron transport film thereon; S6, drying the electron transport film, removing the second mask plate, and forming a third mask area; plating a conductive material on the hole transport film, the perovskite absorption layer, and the electron transport film in the third mask area to form an electrical connection layer; S7, drying the electrical connection layer, removing the third mask plate, and forming a fourth mask area; forming a loop with leads at both ends of the electrical connection layer, and laminating with packaging materials to obtain a solar cell module.

Description

Technical Field

[0001] The present invention relates to the technical field of solar cells, and in particular to a scribed-free perovskite solar cell assembly and a preparation method thereof. Background Art

[0002] In recent years, the third-generation new perovskite solar cells have attracted widespread attention from industry investors due to their excellent features such as high efficiency, simple process, low cost and ideal wide band gap top cells.

[0003] Currently, large-area perovskite solar cell modules are manufactured by dividing them into several perovskite sub-cells connected in series or in series and in parallel through four laser scribing or mechanical scribing processes (p1, p2, p3, and p4). However, laser scribing can cause certain damage to perovskite cell modules, especially the damage to the perovskite light absorption layer and various functional layers caused by the p2 and p3 processes, which can result in a loss of perovskite cell efficiency. On the other hand, when performing through-scribing and surface scribing on the top and bottom materials of the stacked structure, respectively, it was found that incomplete scribing of the surface material can lead to short-circuiting of multiple perovskite sub-cells, thereby reducing the conversion efficiency of the cell. At the same time, the laser scribing process is mostly carried out in an air environment. The oxygen and moisture present in the air environment can have a considerable impact on the crystal structure of the perovskite absorption layer, thereby reducing the stability of the perovskite absorption layer. Summary of the Invention

[0004] The purpose of the present invention is to provide a method for preparing a perovskite solar cell module without scribing, in order to address the problems existing in the existing perovskite solar cell manufacturing process, such as the easy loss of perovskite cell efficiency and poor stability of the perovskite absorption layer. The method of the present invention simplifies the manufacturing process, saves manufacturing costs, and is not adversely affected by laser scribing or the manufacturing environment during the entire manufacturing process. The manufactured cell has high conversion efficiency and good stability.

[0005] The present invention is achieved through the following technical solutions:

[0006] A method for preparing a non-scribe perovskite solar cell module, characterized in that the method comprises the following steps:

[0007] S1. Providing a transparent substrate, cleaning the transparent substrate, and placing a first mask on the transparent substrate;

[0008] S2. Using a first mask plate in combination with a transparent conductive film coating process, a transparent conductive material is deposited on the transparent substrate, and then the first mask plate is removed to form a plurality of strip-shaped transparent conductive films; at the same time, a first mask area is formed around the transparent substrate, and a plurality of long strip-shaped second mask areas are formed in the middle of the transparent substrate;

[0009] S3, placing a second mask plate and a third mask plate on the transparent conductive film, and forming a hole transport film on the transparent conductive film through a vacuum coating process;

[0010] S4, drying the hole transport film, and then coating the hole transport film to form a perovskite absorption layer through a vacuum coating process;

[0011] S5, after drying the perovskite absorption layer, coating an electron transport film thereon;

[0012] S6. After drying the electron transport film, removing the second mask plate to form a third mask area; then plating a conductive material on the hole transport film, the perovskite absorption layer, and the electron transport film in the third mask area to form an electrical connection layer;

[0013] S7. After the electrical connection layer is dried, the third mask plate is removed to form a fourth mask area; after the leads at both ends of the electrical connection layer form an electrical circuit, packaging materials are laid and laminated to finally produce a perovskite solar cell module without scribe lines.

[0014] Specifically, the present invention provides a method for preparing a scribe-free perovskite solar cell module. The method involves using a first mask to form a TCO transparent conductive film layer on a transparent substrate. Simultaneously, using a second mask and a third mask, a hole transport film, a perovskite absorption layer, an electron transport film, and an electrical connection layer are sequentially formed on the TCO transparent conductive film layer. Ultimately, a perovskite solar cell module comprising multiple perovskite sub-cells connected in series is fabricated on the transparent substrate. In the fabrication method provided by the present invention, each perovskite sub-cell is unaffected by laser scribing or the fabrication environment throughout the entire manufacturing process, resulting in each perovskite sub-cell having excellent photoelectric conversion efficiency.

[0015] Furthermore, a method for preparing a scribe-free perovskite solar cell module is provided: the number of mask areas in the first mask plate, the second mask plate and the third mask plate is the same.

[0016] Furthermore, a method for preparing a scribe-free perovskite solar cell module: the transparent substrate in step S1 is made of transparent glass or a flexible substrate material.

[0017] Furthermore, a method for preparing a line-free perovskite solar cell module is provided: the transparent conductive material described in step S2 is selected from any one of indium tin oxide (ITO), fluorine-doped tin oxide (FTO), indium zinc oxide (IZO) or aluminum-doped zinc oxide (AZO); the thickness of the transparent conductive film is 50-200 nm.

[0018] Furthermore, a method for preparing a perovskite solar cell module without scribe lines: the thickness of the hole transport film in step S3 is 20-40 nm; the width ratio of the hole transport film to the transparent conductive film is 0.8-0.9.

[0019] Furthermore, a method for preparing a perovskite solar cell module without scribe lines: the material of the hole transport film in step S3 is NiOx or MoO3 oxide.

[0020] Furthermore, a method for preparing a perovskite solar cell module without scribe lines is provided: the thickness of the perovskite absorption layer (4) described in step S4 is 400-600 nm;

[0021] Among them: the chemical formula of perovskite is ABX3; A represents Cs + 、CH3NH3 + and HN CH(NH2)2 + The positive ion selected from the group consisting of Pb 2+ 、Sn 2+ The positive ion selected from the group consisting of - Br - and I - The negative ions selected from the group.

[0022] Furthermore, a method for preparing a line-free perovskite solar cell module is provided: the material of the electron transport film in step S5 is selected from one of fullerene (C60), fullerene derivatives (PCBM), TiO2 or SnO2.

[0023] Furthermore, a method for preparing a perovskite solar cell module without scribe lines: the material of the electrical connection layer in step S6 is selected from aluminum, silver or gold, or selected from metal oxides ZnO and MoO.

[0024] A scribe-free perovskite solar cell module, characterized in that it is manufactured using the above-mentioned preparation method; the scribe-free perovskite solar cell module comprises: a transparent substrate and a plurality of transparent conductive films, a hole transport film, a perovskite absorption layer, an electron transport film and an electrical connection layer sequentially deposited on the transparent substrate.

[0025] Beneficial effects of the present invention:

[0026] (1) The method for preparing a non-scribe perovskite solar cell module provided by the present invention reduces four scribing processes (four laser scribing processes or mechanical scribing processes), simplifies the preparation process, and saves preparation costs.

[0027] (2) In the method for preparing a scribed-line perovskite solar cell module provided by the present invention, a mask plate process is used to prepare scribed lines, which can avoid the influence of the warping of the transparent substrate on the laser scribing.

[0028] (3) The method for preparing a non-scribe perovskite solar cell module provided by the present invention is such that each perovskite sub-cell is not adversely affected by laser scribing or the manufacturing environment during the entire preparation process, and the perovskite solar cell manufactured thereby has high conversion efficiency and good stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0030] Figure 1 A cross-sectional view of a perovskite solar cell module without scribe lines prepared in the present invention;

[0031] Figure 2 A schematic diagram of the manufacturing process of a scribe-free perovskite solar cell module provided by the present invention;

[0032] Figure 3 It is a schematic front view of the transparent substrate and transparent conductive film in the perovskite solar cell module of the present invention.

[0033] Markings in the figure: 1 transparent substrate, 2 transparent conductive film, 3 hole transport film, 4 perovskite absorption layer, 5 electron transport film, 6 electrical connection layer, 1-1 first mask area, 1-2 second mask area, 1-3 third mask area, 1-4 fourth mask area. DETAILED DESCRIPTION

[0034] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is in no way intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0035] In the description of the present invention, it should be understood that the terms "upper", "lower", "left", "right", "top", "bottom", etc., indicating directions or positional relationships, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific direction, be constructed and operate in a specific direction, and therefore should not be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. Moreover, the terms "first", "second", etc. are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein.

[0036] Example 1

[0037] A method for preparing a non-scribe perovskite solar cell module, characterized in that the method comprises the following steps:

[0038] S1. Providing a transparent substrate 1 (transparent glass or flexible substrate material), then cleaning the transparent substrate 1, and placing a first mask on the transparent substrate 1;

[0039] S2. Using a first mask plate and combining a transparent conductive film coating process, a transparent conductive material is coated on the transparent substrate 1. Then, the first mask plate is removed to form a plurality of strip-shaped transparent conductive films 2 with a thickness of 80 nm. At the same time, a first mask area 1-1 is formed around the transparent substrate 1, and a plurality of long strip-shaped second mask areas 1-2 are formed in the middle of the transparent substrate 1. Figure 3 As shown; wherein: the transparent conductive material can be selected from any one of indium tin oxide, fluorine-doped tin oxide, indium zinc oxide or aluminum-doped zinc oxide;

[0040] S3. Placing a second mask plate and a third mask plate on the transparent conductive film 2 and using them in combination with a vacuum coating device to form a hole transport film 3 with a thickness of about 30 nm on the plurality of transparent conductive films 2 through a vacuum coating process; preferably, in this step, the width ratio of the hole transport film 3 to the transparent conductive film 2 is 0.9, and the hole transport film 3 is made of NiOx or MoO3 oxide;

[0041] S4, annealing / drying the hole transport film 3, and then forming a perovskite absorption layer 4 corresponding to the hole transport film 3 on the hole transport film 3 by a vacuum coating process; wherein: the vacuum coating is performed in a vacuum coating device, and the vacuum coating temperature is 100° C., and the thickness of the perovskite absorption layer 4 is 500 nm;

[0042] S5, after annealing / drying the perovskite absorption layer 4, forming an electron transport film 5 corresponding to the perovskite absorption layer 4 on the perovskite absorption layer 4; specifically, the electron transport film 5 can be made of a material selected from fullerene, a fullerene derivative, TiO2 or SnO2;

[0043] S6. After annealing / drying the electron transport film 5, the second mask is removed to form a third mask area 1-3; then, a conductive material is plated to form an electrical connection layer 6 on the hole transport film 3, the perovskite absorption layer 4, and the electron transport film 5 in the third mask area 1-3; wherein the electrical connection layer 6 can be made of metal aluminum (Al), silver (Ag), or gold (Au), or can be made of metal oxides ZnO and MoO;

[0044] S7. After annealing / drying the electrical connection layer 6, the third mask plate is removed to form a fourth mask area 1-4; after the leads at both ends of the electrical connection layer 6 form an electrical circuit, the packaging material is laid and laminated to finally produce a perovskite solar cell module without scribe lines.

[0045] The structure of the non-scribed perovskite solar cell module prepared in Example 1 is as follows: Figure 1-3 As shown; the unscribed perovskite solar cell assembly includes: a transparent substrate 1 and a plurality of transparent conductive films 2, a hole transport film 3, a perovskite absorption layer 4, an electron transport film 5 and an electrical connection layer 6 sequentially coated on the transparent substrate 1.

[0046] The present invention utilizes a mask combined with a vacuum coating process to first form multiple transparent conductive films on a transparent substrate. Subsequently, multiple hole transport films, multiple perovskite absorption layers, multiple electron transport films, and multiple electrical connection layers are sequentially formed on the transparent conductive films. Ultimately, a perovskite solar cell module consisting of multiple perovskite subcells connected in series on the transparent substrate is completed.

[0047] In the preparation method of the present invention, each perovskite sub-cell is not adversely affected by laser scribing or the preparation environment during the entire manufacturing process, so that each perovskite sub-cell has a better photoelectric conversion efficiency.

[0048] The above preferred embodiments of the present invention are only used to explain the present invention and are not used to limit the present invention. Any obvious changes or modifications derived from the technical solution of the present invention are still within the scope of protection of the present invention.

Claims

1. A method for preparing a non-scribe perovskite solar cell module, characterized in that: The method comprises the following steps: S1. Providing a transparent substrate (1), cleaning the transparent substrate (1), and placing a first mask on the transparent substrate (1); S2, using a first mask plate in combination with a transparent conductive film coating process to coat a transparent conductive material on the transparent substrate (1), then removing the first mask plate to form a plurality of strip-shaped transparent conductive films (2); at the same time, forming a first mask area (1-1) around the transparent substrate (1), and forming a plurality of long strip-shaped second mask areas (1-2) in the middle of the transparent substrate (1); S3, placing a second mask plate and a third mask plate on the transparent conductive film (2), and forming a hole transport film (3) on the transparent conductive film (2) through a vacuum coating process; S4, drying the hole transport film (3), and then coating the hole transport film (3) to form a perovskite absorption layer (4) through a vacuum coating process; S5, drying the perovskite absorption layer (4), and then coating an electron transport film (5) thereon; S6, after drying the electron transport film (5), removing the second mask plate to form a third mask area (1-3); Then, a conductive material is plated on the hole transport film (3), the perovskite absorption layer (4), and the electron transport film (5) at the third mask area (1-3) to form an electrical connection layer (6); S7, after the electrical connection layer (6) is dried, the third mask plate is removed to form a fourth mask area (1-4); after the leads at both ends of the electrical connection layer (6) form an electrical circuit, packaging materials are laid and laminated to finally obtain a perovskite solar cell module without scribe lines.

2. The method for preparing a non-scribe perovskite solar cell module according to claim 1, wherein: The first mask plate, the second mask plate and the third mask plate have the same number of mask regions.

3. The method for preparing a scribe-free perovskite solar cell module according to claim 1, wherein: The transparent substrate (1) in step S1 is made of transparent glass or flexible substrate material.

4. The method for preparing a non-scribe perovskite solar cell module according to claim 1, wherein: The transparent conductive material in step S2 is selected from any one of indium tin oxide, fluorine-doped tin oxide, indium zinc oxide or aluminum-doped zinc oxide; The thickness of the transparent conductive film (2) is 50-200 nm.

5. The method for preparing a non-scribe perovskite solar cell module according to claim 1, wherein: The thickness of the hole transport film (3) in step S3 is 20-40 nm; the width ratio of the hole transport film (3) to the transparent conductive film (2) is 0.8-0.

9.

6. The method for preparing a scribe-free perovskite solar cell module according to claim 1 or 5, characterized in that: The hole transport film (3) in step S3 is made of NiOx or MoO3 oxide.

7. The method for preparing a non-scribe perovskite solar cell module according to claim 1, characterized in that: The thickness of the perovskite absorption layer (4) in step S4 is 400-600 nm; Among them: the chemical formula of perovskite is ABX3; A represents Cs + 、CH3NH3 + and HN CH(NH2)2 + The positive ion selected from the group consisting of Pb 2+ 、Sn 2+ The positive ion selected from the group consisting of - Br - and I - The negative ions selected from the group.

8. The method for preparing a non-scribe perovskite solar cell module according to claim 1, wherein: The material of the electron transport film (5) in step S5 is selected from one of fullerene, fullerene derivatives, TiO2 or SnO2.

9. The method for preparing a scribe-free perovskite solar cell module according to claim 1, wherein: The material of the electrical connection layer (6) in step S6 is selected from aluminum, silver or gold, or selected from metal oxides ZnO and MoO.

10. A perovskite solar cell module without scribe lines, characterized in that: Prepared by the preparation method according to any one of claims 1 to 9; The unscribed perovskite solar cell assembly comprises: a transparent substrate (1) and a plurality of transparent conductive films (2), a hole transport film (3), a perovskite absorption layer (4), an electron transport film (5) and an electrical connection layer (6) which are sequentially plated on the transparent substrate (1).

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