Design for improving stability of perovskite solar cell module

Abstract

The invention belongs to the technical field of solar cells, and particularly relates to a design for improving the stability of a perovskite solar cell module. The battery module is divided into a single-junction battery module, a double-junction battery module and a three-junction battery module, and compact layers are arranged in all the battery modules; each compact layer is located on a patterned perovskite layer, an electron extraction layer and a hole extraction layer, has good continuity and compactness, can perform shape-preserving growth on the patterned substrate to realize complete coverage, and has good electron transmission characteristics and conductivity, so that the normal ohmic contact between an electrode and a conductive film during series connection of the modules can be guaranteed. According to the present invention, the contact between the perovskite layer and the air and the metal electrode can be effectively blocked through the introduction of the compact layers, and when the compact layersare applied to the double-junction and three-junction perovskite laminated solar cell module groups, the introduction of the compact layers can effectively reduce a leakage current caused by the direct contact of a tunneling composite layer and the electrode, and finally the stable perovskite solar cell modules can be obtained.

Description

technical field [0001] The invention belongs to the technical field of solar cells, in particular to a design for improving the stability of a perovskite solar cell module. Background technique [0002] Perovskite solar cells are the fastest-growing type of third-generation new thin-film solar cells. They have increased from 3.8% to more than 25% in just a decade or so, and the cost of power generation of perovskite materials Compared with industrialized silicon solar cells, it is lower and the manufacturing process is simpler. It is considered to be the most commercial type of solar cell at present. [0003] However, to achieve high-efficiency large-area perovskite solar cells, it is necessary to overcome the large series resistance brought by the increase of the electrode area, which will lead to a decrease in the device fill factor and ultimately lead to a decrease in the efficiency of large-area devices. Therefore, when preparing larger-area devices, the whole large-are...

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Problems solved by technology

[0004] In the prior art, in the design process of the perovskite module, the design of P2 is often to cut the prepared extraction layer and the perovskite layer, so that part of the underlying transparent conductive electrode is exposed. However, this step is also The perovskite of the cut section will be exposed to the air. After the electrode is prepared, the electrode will be in direct contact with the perovskite layer at the section. Since the halogen in the perovskite is easy to diffuse and react with the electrode, it is easy to cause the module to fail. The stability is reduced, and the direct contact of the perovskite of the single-junction cell with the electrode will easily lead to an increase in parallel resistance and leakage, and the direct contact with the electrode of the multi-junction stack will easily lead to an increase in the leakage current due to the existence of the tunneling junction.

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