Efficient thin film battery assembly

Abstract

The utility model discloses a high-efficiency thin film battery assembly, which comprises a piece of laminated front glass, a perovskite battery layer, a packaging layer and a piece of back glass, the perovskite cell layer comprises a first transparent conductive layer, a first transmission layer, a perovskite thin film layer, a buffer layer, a second transmission layer and a second transparent conductive layer; the refractive index of the first transparent conducting layer is 1.7-1.85, the thickness of the first transparent conducting layer is 120-140 nm, and corresponding L * a * b * values are as follows: L * = 39-45, a * =-15-1 and b * = 10-15; or the thickness is 140-160nm, corresponding L * is equal to 35-40, a * is equal to-1-15, and b * is equal to-7-12; or the thickness is 160-190 nm, corresponding L * = 33-35, a * = 9-20, and b * =-25--7; or the thickness is 190-220nm, corresponding L * is equal to 35-40, a * is equal to-20-9, and b * is equal to-26--8; or the thickness is 220-250nm, and the corresponding L * is 37-42, the corresponding a * is-25--17, and the corresponding b * is-8-10.

Description

Technical Field

[0001] The utility model relates to the technical field of photovoltaic components, in particular to a high-efficiency thin-film battery component. Background Art

[0002] With the development of photovoltaic technology and the expansion of the market, the combination of photovoltaic power generation and architecture is becoming increasingly mature. Photovoltaic modules are used as part of building components. In addition to meeting the power generation function, they also need to meet the needs of the building itself, including aesthetics, economy, and low environmental impact (low light pollution). These needs have promoted the development and application of colored photovoltaic modules.

[0003] At present, most of the colored thin-film battery modules realize the color function by coating a single or multi-layer colored functional layer on the inner or outer side of the front glass of the module. The colored layer is formed by colored metals, metal compounds, etc. through sputtering, evaporation, vapor deposition, and screen printing. These not only increase the production steps of thin-film battery modules and increase the cost, but the thickness of the colored layer also affects the transmittance of sunlight, thereby significantly reducing the photoelectric conversion efficiency of the module. Utility Model Content

[0004] The purpose of the utility model is to design a high-efficiency thin-film battery component to address the problem that the existing colored thin-film battery components are easy to affect the photoelectric conversion efficiency of the components. The utility model can change the appearance color of the thin-film battery component without setting an additional color rendering layer, while ensuring the photoelectric conversion efficiency of the component.

[0005] In order to achieve the above object, the utility model is realized by the following technical solutions:

[0006] The utility model designs a highly efficient thin-film battery assembly, which includes a front glass, and a perovskite battery layer, a packaging layer and a back glass stacked in sequence on the inner side of the light-entering surface of the front glass; the perovskite battery layer includes a first transparent conductive layer deposited on the front glass, and a first transmission layer, a perovskite thin film layer, a buffer layer, a second transmission layer and a second transparent conductive layer stacked in sequence on the first transparent conductive layer; the first transparent conductive layer is used as a color development layer, and its refractive index is set to 1.7-1.85;

[0007] Wherein: the thickness of the first transparent conductive layer is set to 120-140 nm, and its corresponding L*a*b* values ​​are L*=39-45, a*=-15--1, and b*=10-15 respectively;

[0008] Alternatively, the thickness of the first transparent conductive layer is set to 140-160 nm, and the corresponding L*a*b* values ​​are L*=35-40, a*=-1-15, and b*=-7-12 respectively;

[0009] Alternatively, the thickness of the first transparent conductive layer is set to 160 to 190 nm, and the corresponding L*a*b* values ​​are L*=33 to 35, a*=9 to 20, and b*=-25 to -7;

[0010] Alternatively, the thickness of the first transparent conductive layer is set to 190 to 220 nm, and the corresponding L*a*b* values ​​are L*=35 to 40, a*=-20 to 9, and b*=-26 to -8 respectively;

[0011] Alternatively, the thickness of the first transparent conductive layer is set to 220-250 nm, and the corresponding L*a*b* values ​​are L*=37-42, a*=-25--17, and b*=-8-10 respectively.

[0012] Specifically, the utility model uses the first transparent conductive layer as a color layer and arranges it on the front glass. The appearance color of the thin-film battery assembly is changed by adjusting the thickness of the first transparent conductive layer, and the color peak reflectivity corresponding to visible light is 15-30%.

[0013] In order not to affect the photoelectric conversion efficiency of the thin-film battery assembly and at the same time meet the aesthetic requirements of the assembly appearance, the utility model proposes a highly efficient color thin-film battery assembly. Under the condition that the overall structure and photoelectric conversion performance of the thin-film battery assembly remain basically unchanged, the appearance color of the thin-film battery assembly is changed by adjusting the thickness of the first transparent conductive layer on the front glass and the L*a*b* value matched thereto. The utility model uses the function of the thin-film battery assembly itself to adjust the assembly to have different colors, without the need to set an additional color layer, and its structure is simpler.

[0014] Furthermore, a highly efficient thin-film battery assembly: the first transparent conductive layer is deposited on the inner side of the light-entering surface of the front glass by magnetron sputtering, and its material is ITO.

[0015] Furthermore, a highly efficient thin-film battery assembly: the refractive index of the first transmission layer is set to 1.6-1.75, the thickness is set to 20-60 nm, and the material is NiOx or MoO3.

[0016] Furthermore, a highly efficient thin-film battery assembly: the refractive index of the perovskite thin film layer is set to 2.5-2.7, and the thickness thereof is set to 400-800 nm.

[0017] Furthermore, a high-efficiency thin-film battery component: the refractive index of the buffer layer is set to 2.1-2.4, the thickness is set to 10-50nm, and it is made of fullerene material.

[0018] Furthermore, a high-efficiency thin-film battery assembly: the refractive index of the second transmission layer is set to 1.8-2.0, the thickness is set to 5-20 nm, and the material is TiO2 or SnO2.

[0019] Furthermore, a highly efficient thin-film battery assembly: the refractive index of the second transparent conductive layer is set to 1.9-2.0, the thickness is set to 150-200nm, and it is made of ITO, FTO or AZO material.

[0020] Beneficial effects of the utility model:

[0021] The utility model adjusts the thickness of the first transparent conductive layer on the inner surface of the light incident side of the front glass and the L*a*b* value matched thereto to achieve the change of the appearance color of the thin-film battery assembly. Different thicknesses correspond to different colors, and there is no need to set an additional color functional layer on the front glass. The structure is more stable and simple, and it basically does not affect the light transmittance of the assembly, so the effect on the photoelectric conversion efficiency of the thin-film battery assembly is small. At the same time, the production steps of the thin-film battery assembly are correspondingly reduced, the production process is simpler, the cost is low, and the effect is good. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0023] Figure 1 A layered schematic diagram of a high-efficiency thin-film battery assembly provided in Example 1 of the utility model;

[0024] Figures 2 to 5 They correspond to the reflection spectra of Examples 1 to 4 respectively.

[0025] Markings in the figure: 1-front glass, 2-perovskite cell layer, 3-encapsulation layer, 4-back glass, 21-first transparent conductive layer, 22-first transmission layer, 23-perovskite thin film layer, 24-buffer layer, 25-second transmission layer, 26-second transparent conductive layer. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means a limitation on the utility model and its application or use. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0027] In the description of the present utility model, it should be understood that the terms "upper", "lower", "left", "right", "top", "bottom" and the like indicate positions or positional relationships, which are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first" and "second" are used only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. Moreover, the terms "first", "second" and the like 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 utility model described herein can be implemented in an order other than those illustrated or described herein.

[0028] Example 1

[0029] like Figure 1 As shown, a high-efficiency thin-film battery assembly is provided, which includes a front glass 1, and a perovskite battery layer 2, an encapsulation layer 3 and a back glass 4 which are sequentially stacked on the inner side of the light incident surface of the front glass 1;

[0030] Wherein: the perovskite cell layer 2 comprises a first transparent conductive layer 21 deposited on the inner side of the light incident surface of the front glass 1, and a first transmission layer 22, a perovskite thin film layer 23, a buffer layer 24, a second transmission layer 25 and a second transparent conductive layer 26 stacked in sequence on the first transparent conductive layer 21;

[0031] Wherein: the first transparent conductive layer 21 is deposited on the inner side of the light incident surface of the front glass 1 by magnetron sputtering, and its material is ITO with a refractive index of 1.81; the thickness of the first transparent conductive layer 21 is set to 135nm, and its corresponding L*a*b* values ​​are L*=41.85, a*=-7.18, b*=14.25 respectively. Figure 2 As shown;

[0032] The refractive index of the first transmission layer 22 is set to 1.75, and its thickness is set to 20nm, and it is made of NiOx material; the refractive index of the perovskite thin film layer 23 is set to 2.6, and its thickness is set to 500nm; the refractive index of the buffer layer 24 is set to 2.2, and its thickness is set to 20nm, and it is made of fullerene material; the refractive index of the second transmission layer 25 is set to 1.9, and its thickness is set to 10nm, and it is made of SnO2 material; the refractive index of the second transparent conductive layer 26 is set to 1.96, and its thickness is set to 160nm, and it is made of ITO material; finally, the appearance of the thin film battery assembly obtained in Example 1 presents a yellow effect.

[0033] The method for preparing a high-efficiency thin-film battery assembly of the above-mentioned embodiment 1 comprises the following specific steps:

[0034] S1, depositing indium tin oxide (ITO) on the inner side of the light incident surface of the front glass 1 by magnetron sputtering to form a transparent conductive layer, and then performing P1 laser scribing on the transparent conductive layer by laser, thereby forming a plurality of first transparent conductive layers 21 with a thickness of 135 nm;

[0035] S2, combining with a vacuum coating device to form a first transmission layer 22 with a thickness of 20 nm on the plurality of first transparent conductive layers 21;

[0036] S3, after annealing / drying the first transmission layer 22, a perovskite thin film layer 23 with a thickness of 500 nm is coated on the first transmission layer 22, wherein the chemical formula of the perovskite is ABX3, where A represents Cs + 、CH3NH3 + and HN CH(NH2)2 + The positive ion selected from the group consisting of 2+ Sn 2+ The positive ion selected from the group consisting of - and I - Negative ions selected from the group consisting of;

[0037] S4, after annealing / drying the perovskite film layer 23, a buffer layer 24 with a thickness of 20 nm is formed on the perovskite film layer 23 by vapor deposition, and the material of the buffer layer 24 is fullerene (C60); then, after annealing / drying the buffer layer 24, a second transmission layer 25 with a thickness of 10 nm is formed thereon, and the material of the second transmission layer 25 is SnO2;

[0038] S5, after annealing / drying the second transmission layer 25, perform P2 laser scribing to form a plurality of perovskite sub-cells, then use RPD equipment to prepare a second transparent conductive layer 26 with a thickness of 160nm on the second transmission layer 25, and finally perform P3 laser scribing and P4 edge cleaning on the cell, finally forming a perovskite solar thin-film cell assembly with sub-cells connected in series;

[0039] S6. After the leads form a circuit loop, the packaging layer 3 and the back glass 4 are laid and laminated, and finally a thin-film battery assembly with a yellow appearance is obtained, and the battery efficiency is 16%.

[0040] Example 2

[0041] The difference between Example 2 and Example 1 is that in Example 2, the thickness of the first transparent conductive layer 21 is set to 180 nm, and its corresponding L*a*b* values ​​are L*=33.24, a*=15.12, and b*=-23.92, respectively. Figure 3 As shown, the final thin-film battery assembly has a purple appearance and a battery efficiency of 17.5%.

[0042] Example 3

[0043] The difference between Example 3 and Example 1 is that in Example 3, the thickness of the first transparent conductive layer 21 is set to 210 nm, and its corresponding L*a*b* values ​​are L*=36.19, a*=-9.5, b*=-17.17, respectively. Figure 4 As shown, the final thin-film battery assembly has a blue appearance and a battery efficiency of 16.5%.

[0044] Example 4

[0045] The difference between Example 4 and Example 1 is that in Example 4, the thickness of the first transparent conductive layer 21 is set to 240 nm, and its corresponding L*a*b* values ​​are L*=40.16, a*=-22.56, and b*=6.42, respectively. Figure 5 As shown, the final thin-film battery assembly has a green appearance and a battery efficiency of 15.5%.

[0046] The above preferred embodiments of the utility model are only used to explain the utility model, and are not used to limit the utility model. Any obvious changes or modifications derived from the technical solution of the utility model are still within the protection scope of the utility model.

Claims

1. A high-efficiency thin-film battery assembly, characterized in that: The thin-film battery assembly comprises a front glass (1), and a perovskite battery layer (2), a packaging layer (3) and a back glass (4) which are sequentially stacked and arranged on the inner side of the light incident surface of the front glass (1); The perovskite cell layer (2) comprises a first transparent conductive layer (21) deposited on the front glass (1), and a first transmission layer (22), a perovskite thin film layer (23), a buffer layer (24), a second transmission layer (25) and a second transparent conductive layer (26) sequentially stacked on the first transparent conductive layer (21); the first transparent conductive layer (21) serves as a color development layer, and its refractive index is 1.7 to 1.85; Wherein: the thickness of the first transparent conductive layer (21) is set to 120-140 nm, and its corresponding L*a*b* values ​​are L*=39-45, a*=-15--1, and b*=10-15 respectively; Alternatively, the thickness of the first transparent conductive layer (21) is set to 140-160 nm, and the corresponding L*a*b* values ​​are L*=35-40, a*=-1-15, and b*=-7-12 respectively; Alternatively, the thickness of the first transparent conductive layer (21) is set to 160 to 190 nm, and the corresponding L*a*b* values ​​are L*=33 to 35, a*=9 to 20, and b*=-25 to -7 respectively; Alternatively, the thickness of the first transparent conductive layer (21) is set to 190-220 nm, and its corresponding L*a*b* values ​​are L*=35-40, a*=-20-9, and b*=-26--8 respectively; Alternatively, the thickness of the first transparent conductive layer (21) is set to 220-250 nm, and its corresponding L*a*b* values ​​are L*=37-42, a*=-25--17, and b*=-8-10 respectively.

2. A high-efficiency thin-film battery assembly according to claim 1, characterized in that: The first transparent conductive layer (21) is deposited on the inner side of the light incident surface of the front glass (1) by magnetron sputtering, and its material is ITO.

3. A high-efficiency thin-film battery assembly according to claim 1, characterized in that: The refractive index of the first transmission layer (22) is set to 1.6-1.75, and the thickness is set to 20-60 nm. The first transmission layer (22) is made of NiOx or MoO3.

4. A high-efficiency thin-film battery assembly according to claim 1, characterized in that: The refractive index of the perovskite thin film layer (23) is set to 2.5-2.7, and the thickness thereof is set to 400-800 nm.

5. A high-efficiency thin-film battery assembly according to claim 1, characterized in that: The refractive index of the buffer layer (24) is set to 2.1-2.4, the thickness is set to 10-50 nm, and the buffer layer (24) is made of fullerene material.

6. A high-efficiency thin-film battery assembly according to claim 1, characterized in that: The refractive index of the second transmission layer (25) is set to 1.8-2.0, and the thickness is set to 5-20 nm. The second transmission layer (25) is made of TiO2 or SnO2.

7. A high-efficiency thin-film battery assembly according to claim 1, characterized in that: The refractive index of the second transparent conductive layer (26) is set to 1.9-2.0, and the thickness is set to 150-200 nm. The second transparent conductive layer (26) is made of ITO, FTO or AZO.

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