Flexible thin film solar cell and preparation method thereof

Abstract

The invention provides a flexible thin film solar cell, wherein the cell comprises the following structures: a light inlet substrate (21) which is formed from a flexible thin polymer film; a first electrode layer (22) which is formed by depositing zinc oxide on the light inlet substrate (21); a photoelectric conversion layer (23) which consists of p-type, i-type and n-type amorphous silicon layers formed in turn on the first electrode layer (22); and a second electrode layer (24) which is formed by depositing zinc oxide on the photoelectric conversion layer (23). The preparation method forms front and back electrode layers of the thin film solar cell by adopting a zinc oxide low-temperature deposition process, enables the thin polymer film to be taken as a flexible substrate, and can transplant the process for manufacturing the thin film solar cell with a glass substrate to the process for manufacturing the flexible thin film solar cell with a polymer substrate.

Description

technical field [0001] The invention relates to a solar cell manufacturing process, in particular to a flexible thin-film solar cell and a preparation method thereof. Background technique [0002] With the rapid development of modern industry, the rapid upgrading of technology and the demand for energy, the energy structure is undergoing fundamental changes. Traditional energy sources: the use of coal, oil, and natural gas will reach its peak between 2020 and 2040, and will gradually dry up after 2050. Alternative energy sources such as renewable energy (mainly solar energy) have grown rapidly since 2000, and usage will peak by 2050. Traditional solar cells use monocrystalline silicon or polycrystalline silicon thin slices, among which silicon materials are widely used, resulting in serious waste, and the purification process of silicon elements is complicated and costly. Thin-film solar cells use amorphous silicon or other materials, and use little or no silicon material,...

AI Technical Summary

Problems solved by technology

Therefore, the traditional process is difficult to apply to flexible polymer substrates. Even if the process is changed and the coating temperature is lowered, the conversion efficiency of the solar cells produced is relatively low, generally below 5%, which affects the application effect and the cost is too high.

[0006] Therefore, this traditional thin-film solar cell manufacturing process for glass substrates is difficult to be directly transplanted into the manufacture of flexible thin-film solar cells with polymer materials as substrates.

Images