Selenide forerunner thin film and method for producing film cell through rapid selenium vulcanizing thermal treatment

Abstract

The invention relates to a method of a low cost selenide van thin film and the fast selenium sulfuration heat treatment to prepare the solar cell, which can be used in the nm selenide paint roll coating or the electrodeposit method to prepare the selenide van film, through the vacuum flash selenium sulfuration heat treatment, the high efficiency cadmium-free thin film solar cell or the photovoltaic integrated module. The thin film cell adsorption layer band gap is in the v-shaped distribution, and the flash selenium sulfuration heat treatment causes the CuSe in the porous loose thin film fusing, soaking, liquid phase serving the reaction growth of the CIGS film crystal and the self densification of the film with the In4Se3, reactive sputtering In2Se3 or In2S3 to neutralize the excessive CuxSe adsorbed by the film surface layer, going on splashing the micro excessive In2S3 to generate n-high-ohmic resistor Cu(In<1-y>Gay)<3>(SxSe<1-x>)<5> thin film cell shallow burying, then reacting the splashing deposit n-type In(OH,S) / ZnS(O,OH) / Zno(S) buffer layer with the i-layer, linking the slashing transparent conductive film / and laserprocessing collecting ellectrode to complete the preparation of the thin film cell.

Description

technical field [0001] The invention relates to the preparation of compound semiconductor thin film devices, more specifically, to the preparation of copper indium gallium selenide sulfur [Cu(In 0.7 , Ga 0.3 ) Se 2-x S X Abbreviated as CIGS] selenide precursor film of thin film solar cells, and after vacuum rapid selenium sulfide heat treatment, the method of directly and continuously preparing thin film solar cells or photovoltaic integrated modules. Background technique [0002] Solar cell power generation is a renewable energy technology that has the least impact on the environment in the process of generating electricity. For solar power technology to be commercially successful, solar cells must be more efficient, lower cost, better weather-resistant, and not add to other environmental concerns. The development of traditional crystalline silicon solar cell technology benefits from the continuous technological progress of electronic silicon semiconductor materials. To...

AI Technical Summary

Problems solved by technology

The problem is that the deposited film is generally a Cu-rich film, and after heat treatment, it needs to etch or dissolve the Cu in the Cu-rich phase of the film in the KCN solution. 2 Se, which will affect the structure of the film surface and the quality of the pn junction of the battery

The existing problems are: Mo substrate corrodes due to chemical replacement reaction at the initial stage of deposition, the solubility of solute in the solution is small, the current density of electrodeposited semiconductor selenide film is relatively small, and the deposition rate of film is slower than that of electrodeposition and coating method. Low, the film contains a lot of oxygen, the stability of the solution still has problems, etc., only in the H 2 Se or H-like 2 Treatment in Se gas can effectively remove oxides, which adds difficulties to eliminate the use of toxic gases

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