A flexible large-area tandem solar cell with multi-scale light trapping and its preparation method

Abstract

Provided are a flexible, large-area laminated solar battery capable of multi-scale light trapping, and a preparation method therefor. A rigid substrate (100) with a large-scale textured surface is selected and a structure of the substrate surface is transferred onto an antireflection film (300) to enable the antireflection film (300) to form a large-scale textured surface, and then a front electrode (400) with a small-scale textured surface is prepared on the antireflection film (300) to enable the antireflection film (300) and the front electrode (400) to be effectively combined into a multi-scale light trapping structure, such that the light trapping performance of various photoelectric conversion layers of a flexible laminated solar battery is improved, thereby increasing the photoelectric conversion efficiency of the solar battery.

Description

technical field [0001] The invention relates to the field of flexible solar cells, in particular to a flexible large-area stacked solar cell with multi-scale light trapping and a preparation method thereof. Background technique [0002] Solar cells can be roughly divided into two types according to the type of substrate: one is to use hard materials as substrates, such as common glass substrates; the other is to use flexible materials as substrates, such as resin polymer substrates, high-temperature plastics, etc. Substrate etc. Among them, flexible solar cells can realize building-integrated photovoltaics due to their light weight and non-fragility, the production of power stations can reduce transportation costs and installation costs, and a series of advantages such as the ability to produce portable solar cells have become research hotspots in recent years. [0003] At present, flexible solar cells are basically prepared directly on flexible substrates using equipment s...

AI Technical Summary

Problems solved by technology

However, in the method for manufacturing large-area flexible thin-film solar cells provided by 201110088307.8, the peeling protective film is transparent plastic, which is directly pasted on the surface of the hard substrate, so even if the surface is textured, the stress during heating or coating process cannot be completely eliminated Influence; at the same time, the plastic is required to be transparent, temperature-resistant, and plasma-resistant when it is separated from the protective film, and the cost is very high

Furthermore, for flexible tandem solar cells, since different photoelectric conversion layers have large differences in light absorption in different wavelength bands, it is difficult to rely only on the fleece structure that is separated from the protective film and without any requirements for the structure. Excellent light trapping effect achieved in each stack

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