Split type film solar battery composition structure

Abstract

The invention relates to a split type film solar battery composition structure, which at least comprises a plurality of film solar battery units and a back plate protection layer, wherein all film solar battery units are connected and split, the back plate protection layer is formed on the connected and split film solar battery units, each film solar battery unit comprises a transparent base plate, a first conducting layer, a p-i-n semiconductor layer and a second conducting layer, one side of the transparent base plate is a light illumination surface, the first conducting layer is formed on the transparent base plate and is used for making light rays passing the transparent base plate enter the battery units, the p-i-n semiconductor layer is formed above the first conducting layer and is used for generating electron hole pairs after receiving the light irradiation so that light current is provided and the light absorption rate is improved, and the second conducting layer is formed on the p-i-n semiconductor layer and is used for taking out electric energy with the first conducting layer and improving the light and electricity conversion efficiency.

Description

technical field [0001] The invention relates to a composition structure of an assembled thin-film solar cell, especially a composition structure of a large-area thin-film solar cell. Background technique [0002] Thin-film solar cells can be mass-produced on cheap glass, plastic or stainless steel substrates to produce large-area solar cells, and its technology can be directly imported into the already quite mature TFT-LCD technology, which is one of its advantages. Therefore, the industry is rushing to invest in research in this field. [0003] Basically, compared with other types of solar cells, the process of thin-film solar cells is relatively simple, and has the advantages of low cost and mass production. For the composition of thin-film solar cell substrates, see figure 1 The existing conventional thin-film solar cell structure diagram, the basic process will go through three layers of deposition (deposition), three laser scribing (scribe) procedures, as described be...

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Problems solved by technology

[0006] However, as mentioned above, the existing solar photovoltaic stencil technology adopts the plasma-assisted chemical vapor deposition (Plasma Enhanced Chemical Vapor Deposition, PECVD) process to grow a p-i-n type hydrogenated amorphous silicon structure (p-a-Si) on the electrode surface. :H / i-a-Si:H / n-a-Si:H) as the main absorption layer (Active layer), the size of the template is limited by the film size of the PECVD reaction chamber (standard size is 1.4×1.1m 2 ), the chamber must be evacuated at the beginning of the process. If it is necessary to make a large-area solar photovoltaic template for building integration, for example, the size is 5×5m 2 It is necessary to develop large-scale PECVD process equipment to overcome the problems of uneven film formation (uniformity) of the main absorbing layer and difficulty in vacuum extraction. The cost and price are very high, which is not conducive to building integrated photovoltaic systems or other markets. Large-area thin-film solar module application market

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