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

Abstract

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.

Description

technical field [0001] The invention relates to a solar cell device, in particular to a method for preparing a CIGS solar cell light-absorbing layer by a non-vacuum predetermined amount coating method. Background technique [0002] Solar energy has the advantages of inexhaustible, inexhaustible and non-polluting resources. Solar photovoltaic power generation is an important technology for solar energy utilization. In recent years, the increasing shortage of traditional energy sources and the increasing emphasis on environmental issues around the world have made renewable energy represented by the photovoltaic industry usher in a peak period of development. The world's solar cell market has grown rapidly since 2000, and has grown rapidly at an annual growth rate of 30% to 40% in recent years. According to conservative estimates, the solar cell market will rise from 5.625GW in 2008 to 79.53GW in 2015. The output will reach 380GW in 2030, when photovoltaic power generation wil...

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Problems solved by technology

At present, domestic Nankai University, Vosges Science and Technology and other departments have started work in this area and have achieved certain achievements. However, the development of low-cost, high-efficiency thin-film materials and the research and development of low-cost and high-efficiency battery preparation processes are the development bottlenecks of CIGS thin films.

Therefore, due to the advantages mentioned above, non-vacuum CIGS has become a high-profile object in thin-film batteries. -to-roll) equipment research is relatively lagging behind, the core technology of non-vacuum preparation of the absorbing layer is lacking, and the complexity of the battery structure and process, the ability of my country's non-vacuum and low-cost process to prepare CIGS thin films is insufficient, facing opportunities, but also challenges, urgently needed There are more research forces invested in