A CIGS solar battery light absorbing layer preparation method by adopting an antivacuum preset-quantity coating method

2011 
The present invention discloses a CIGS solar battery light absorbing layer preparation method by adopting an antivacuum preset-quantity coating method, comprising following steps: 1 a step of forming four stable source solutions of copper, indium, gallium and selenium with copper, indium, selenide of gallium and selenium simple substance powder; 2 a step of preparing stable precursor solutions of different stoichiometric ratios with the four source solutions mentioned above respectively in stoichiometric ratios of copper, indium and gallium in a copper indium gallium selenium solar battery light absorbing layer Cu1-yIn1-xGaxSe2 (0<=x<=1, 0<=z<=0.3); 3 a step of coating the precursor solutions on all substrates to form graded distribution of gallium element and a copper indium gallium selenium precursor film with a poor copper surface based on gallium content by adopting an antivacuum preset-quantity coating method; and 4 a drying and annealing step to form a copper indium gallium selenium compound film. The preparation method is characterized by simple technology, high safety, low cost, and superior performance of the film.
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