Flat heterojunction inorganic thin film solar cell and preparation method thereof

Abstract

The invention belongs to the technical field of solar cells and preparation methods thereof, and relates to a flat heterojunction inorganic thin film solar cell and a preparation method thereof. The flat heterojunction inorganic thin film solar cell comprises a gold electrode, a hole transport layer, a stacked multi-layer light absorption material, a black antimony light absorption layer, a modification layer, a titanium dioxide layer and FTO conductive glass; the gold electrode isnano zinc selenide modified gold electrode; according to the stacked multi-layer light absorption material, Al2O3, ZrO2 or SiO2 nano particles are adopted to load silver tin oxide nano particles to serve as the light absorption material; and the titanium dioxide layer is of a nano structure. According to the flat heterojunction inorganic thin film solar cell and the preparation method thereof of the invention, the thickness of a TiO2 film is controlled to reach the optimal value by using the number of the times of spin-coating of a spin-coating technology; deposition time is controlled by a chemical bath deposition technology to reach the optimal value of the thickness of a Sb2S3 film; and according to a doping technology, the concentration of carriers (electrons and holes) in Sb2S3 reaches the optimal value by selecting proper types of doping materials and doping amounts.

Description

technical field [0001] The invention relates to the technical field of solar cells and preparation methods thereof, in particular to a flat heterojunction inorganic thin film solar cell and a preparation method thereof. Background technique [0002] Converting solar energy into electrical energy and realizing photovoltaic power generation is an important way to utilize renewable energy. The most critical part of the photovoltaic power generation system is the device that captures and converts solar energy, that is, the solar cell. Solar cells in practical applications need to meet two basic requirements: high efficiency (>10%) and stable cell performance (lifetime >20 years). The photoactive layer of a solar cell is the region where light is absorbed and free charges are generated. It is usually composed of a heterojunction thin film system composed of n-type semiconductors and p-type semiconductors. It plays a decisive role in the photoelectric conversion process of ...

AI Technical Summary

Problems solved by technology

Although inorganic materials with good quality and high crystallinity and high-efficiency solar cell devices can be obtained, these vapor deposition preparation methods often have complex techniques and equipment, high energy consumption (requires high vacuum, high temperature of 400-1400°C), and material loss. Large and other deficiencies, and the supply of high-purity raw materials is also limited; the existence of these deficiencies results in high battery costs, which is not conducive to large-scale applications

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