Transparent conducting layer for heterojunction solar cell and heterojunction solar cell

Abstract

The present invention provides a transparent conducting layer for a heterojunction solar cell and a heterojunction solar cell. The transparent conducting layer comprises a conducting polymer layer including an opposite first surface and second surface. A one-dimensional conducting material located on at least one surface of the opposing surfaces of the conducting polymer layer or coated inside theconducting polymer layer. The invention reduces or even avoids the use of rare indium element with high valence, and can remarkably reduce the production cost; The process is simple, does not need high-priced vacuum equipment, does not need high-temperature process, more suitable for heterojunction batteries; At the same time, the light transmittance of the transparent conducting layer of the invention is equivalent to that of the existing indium oxide-based thin film, and the transparent conducting layer has high conductivity, so that the consumption of the metal electrode paste can be reduced; Compared with the existing indium oxide-based thin films, the cost is lower and the mechanical properties are better, which can be widely used in flexible devices.

Description

technical field [0001] The invention relates to the technical field of solar cell photovoltaics, in particular to a transparent conductive layer for a heterojunction solar cell and the heterojunction solar cell. Background technique [0002] HIT (Heterojunction with Intrinsic Thin-Layer) cell is a high-efficiency heterojunction silicon-based solar cell, a heterogeneous crystalline silicon solar cell with an ultra-thin intrinsic hydrogenated amorphous silicon layer, which has the advantages of high conversion efficiency and low production cost. In recent years, through the continuous exploration of new materials and the continuous optimization of the device manufacturing process, the conversion efficiency and production cost of HIT cells have been further reduced, and the transition from the laboratory to large-scale commercial applications has been realized. The traditional HIT battery is prepared on the n-type single crystal Si wafer after surface texture, from the front su...

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Problems solved by technology

[0004] In view of the shortcomings of the prior art described above, the object of the present invention is to provide a transparent conductive layer for heterojunction solar cells and a heterojunction solar cell to solve the problems in the prior art heterojunction solar cells. The use of indium element in the transparent conductive layer has the problems of high price of indium element, expensive reactive sputtering deposition equipment, high process temperature and high production cost

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