CN-121985673-A - Perovskite laminated solar cell, preparation method thereof and photovoltaic module

CN121985673ACN 121985673 ACN121985673 ACN 121985673ACN-121985673-A

Abstract

The application discloses a perovskite laminated solar cell, a preparation method thereof and a photovoltaic module, wherein the cell comprises a silicon substrate cell, a perovskite top cell, the perovskite top cell comprises a perovskite layer, a buffer layer and a transparent conductive layer, the buffer layer is positioned between the perovskite layer and the transparent conductive layer, the composite layer is positioned between the silicon substrate cell and the perovskite top cell, and the buffer layer extends from the side face to the direction close to the silicon substrate cell and at least covers the junction of the perovskite layer and the side face. The buffer layer fully protects the perovskite layer, improves the stability of the perovskite layer, improves the passivation effect and the protection effect on the perovskite layer, is easy to realize mass production, and has lower cost.

Inventors

ZHANG HUI
LI CHUNXIU
LU XIAOKANG
HONG CHENGJIAN
XU XIXIANG

Assignees

隆基绿能科技股份有限公司西咸新区分公司

Dates

Publication Date: 20260505
Application Date: 20251224

Claims (13)

1. A perovskite stacked solar cell comprising: A silicon-based battery; A perovskite top cell comprising a perovskite layer, a buffer layer, and a transparent conductive layer, the buffer layer being located between the perovskite layer and the transparent conductive layer; a composite layer between the silicon substrate cell and the perovskite top cell; The perovskite stacked solar cell has opposite first and second sides along a thickness direction of the perovskite stacked solar cell, the perovskite stacked solar cell further having sides connecting the first and second sides; The buffer layer extends from the side face to the direction close to the silicon substrate battery and at least covers the junction of the perovskite layer and the side face.
2. The perovskite-stacked solar cell of claim 1 wherein the buffer layer covers to the intersection of the composite layer and the side.
3. The perovskite-stacked solar cell of claim 1 wherein the first face is adjacent to the silicon-based cell and the second face is adjacent to the perovskite top cell; The silicon substrate battery also comprises a doped layer positioned on one side of the silicon substrate close to the first surface; The buffer layer covers to the junction of the doped layer and the side surface.
4. The perovskite-stacked solar cell of claim 1 wherein the first face is adjacent to the silicon-based cell and the second face is adjacent to the perovskite top cell; the buffer layer extends around at least a portion of the first face.
5. The perovskite-stacked solar cell of claim 1, wherein the buffer layer comprises one or a combination of tin oxide, titanium oxide, or aluminum oxide.
6. The perovskite-stacked solar cell of claim 1, further comprising a hole transport layer between the composite layer and the perovskite layer, the hole transport layer extending through the side toward the silicon substrate cell, covering at least a portion of the side, or The perovskite top cell further comprises an anti-reflection layer which is positioned on one side of the transparent conductive layer far away from the composite layer, and the anti-reflection layer extends to the direction close to the silicon substrate cell through the side surface and covers at least part of the side surface.
7. The perovskite-stacked solar cell of claim 6 wherein the anti-reflection layer covers to the intersection of the perovskite layer and the side.
8. The perovskite-stacked solar cell of claim 1, wherein the thickness of the buffer layer overlying the side is H1, the H1 being 3nm or greater.
9. The perovskite-stacked solar cell of claim 8, wherein H1 is 20nm or less.
10. The perovskite-stacked solar cell of claim 8, wherein the H1 gradually decreases in a direction toward the silicon substrate.
11. The perovskite-stacked solar cell according to any one of claims 1 to 6, wherein the silicon substrate comprises opposite third and fourth faces in a thickness direction of the perovskite-stacked solar cell, the silicon substrate cell further comprising a doping layer and a passivation layer on at least one surface of the third and fourth faces; at least one of the doped layer and the passivation layer covers the junction of the silicon substrate and the side surface.
12. A method of fabricating a perovskite stacked solar cell, comprising: providing a silicon-based cell; Forming a composite layer on the silicon-based battery; Sequentially forming a perovskite layer, a buffer layer and a transparent conductive layer on the composite layer; the buffer layer is formed by an atomic layer deposition method, evaporation or magnetron sputtering, preferably an atomic layer deposition method.
13. A photovoltaic module comprising an electrical connector and a plurality of the photovoltaic modules of claim 1 11, And a calcium salt according to any one of claims a titanium-ore laminated solar cell, the electrical connector is used for electrically connecting adjacent perovskite laminated solar cells.

Description

Perovskite laminated solar cell, preparation method thereof and photovoltaic module Technical Field The application belongs to the technical field of photovoltaics, and particularly relates to a perovskite laminated solar cell, a preparation method thereof and a photovoltaic module. Background The perovskite battery has the advantages of higher conversion efficiency, simple preparation process, low cost potential and the like, and has become a thin film solar battery with industrialization prospect. Among them, perovskite stacked solar cells have been rapidly developed with the advantages of higher cell conversion efficiency and lower cost. For example, certain perovskite stacked solar cells may have theoretical photoelectric conversion efficiencies of greater than 30%. However, the instability of perovskite layers is still an important factor limiting the large-area production and large-scale use of perovskite stacked solar cells. Disclosure of Invention The application aims to provide a perovskite laminated solar cell, a preparation method thereof and a photovoltaic module, and at least solves the problem of unstable perovskite layers in the perovskite laminated solar cell. In a first aspect, an embodiment of the present application proposes a perovskite stacked solar cell, including: A silicon-based battery; A perovskite top cell comprising a perovskite layer, a buffer layer, and a transparent conductive layer, the buffer layer being located between the perovskite layer and the transparent conductive layer; a composite layer between the silicon substrate cell and the perovskite top cell; The perovskite laminated solar cell is provided with a first face and a second face which are opposite to each other along the thickness direction of the perovskite laminated solar cell; The buffer layer extends from the side face to the direction close to the silicon substrate battery and at least covers the junction of the perovskite layer and the side face. The part of the perovskite layer which meets the side surface is not covered by the perovskite adjacent layer in the prior art, in the application, at least the buffer layer which is covered to the intersection of the perovskite layer and the side surface is covered on the side surface, the side surface of the perovskite layer which is not covered in the prior art can be covered, and at least the perovskite layer of the perovskite laminated solar cell can be protected in the process of transporting, packaging the perovskite laminated solar cell and the like, so that the stability of the perovskite layer is improved. Especially when the buffer layer is formed in an ALD (atomic layer) mode and the like, the buffer layer is more compact, side damage of the perovskite layer is obviously reduced, meanwhile, the buffer layer at least covered on the side face of the perovskite layer can also obviously isolate corrosion of external factors such as water vapor, oxygen, a heat source and the like on the perovskite laminated solar cell and the perovskite layer, the stability of the perovskite layer is further improved, and the reliability of the perovskite laminated solar cell is further improved. In some embodiments, the buffer layer covers to the intersection of the composite layer and the side. Firstly, the buffer layer between the transparent conducting layer and the composite layer covers the junction of the composite layer and the side surface, namely covers the side surface of the composite layer, so that the composite layer and the transparent conducting layer are physically isolated, the transparent conducting layer and the composite layer cannot be in direct contact in the perovskite laminated solar cell, and the leakage risk is further reduced. Secondly, compared with other film layers between the transparent conductive layer and the composite layer, when the buffer layer is formed in an ALD mode and the like, the buffer layer is more compact and has a certain insulation effect, the physical insulation effect on the composite layer and the transparent conductive layer is better, and the leakage risk is further reduced. And thirdly, compared with other film layers between the transparent conductive layer and the composite layer, when the buffer layer is formed by adopting an ALD (atomic layer deposition) mode and the like, the productivity is higher, the process maturity cost is low, the uniformity of the film thickness of the buffer layer of other batteries is hardly influenced in the process of mass-producing the part of the buffer layer positioned on the side surface of the composite layer, the production efficiency and the like of the perovskite laminated solar cell are hardly influenced, and the perovskite laminated solar cell is suitable for mass production. In some embodiments, the first face is proximate to the silicon substrate cell and the second face is proximate to the perovskite top cell; The silicon substrate battery also comprises a doped layer positi