Copper indium gallium selenium absorption layer prepared by non-vacuum method without selenizing process

Abstract

The invention relates to a copper indium gallium selenium absorption layer prepared by a non-vacuum method without a selenizing process. The non-vacuum method is characterized by comprising the threetechnological steps of: preparing copper indium gallium selenium colloid, preparing a copper indium gallium selenium precursor film and performing annealing heat treatment. Copper chloride, indium sulfate, gallium chloride and selenium dioxide are utilized as a Cu source, an In source, a Ga source and an Se source and are prepared according to the molar ratio (Cu to In to Ga to Se = 1 to 1.4 to 0.6 to 4); ethyl alcohol is utilized as a solvent; triethanolamine is simultaneously added into to serve as a complexing agent and an adhesive; the materials are stirred for dissolving under a certain temperature until white thick liquid is obtained; the white thick liquid is taken out, volatilized and aged; the white thick liquid is moderately dissolved into the ethyl alcohol and then scrape coatedor dispensed to a substrate; the copper indium gallium selenium absorption layer is obtained after certain-temperature heat treatment. The copper indium gallium selenium absorption layer disclosed bythe invention has the advantages of simple production technology and environmental protection; a flat copper indium gallium selenium film with a completed structure and a forbidden bandwidth of 1.39eV can be obtained without through any refeeding selenizing technology.

Description

technical field [0001] The invention relates to the field of new energy sources of optoelectronic materials, in particular to a copper indium gallium selenium absorbing layer prepared by a non-vacuum method without selenization process. Background technique [0002] Energy is an important material basis for the existence and development of human civilization. With the rapid development of social economy, the increasingly serious environmental pollution problems and the continuous increase in energy demand, traditional energy represented by fossil energy such as coal, oil and natural gas can no longer meet the needs of social and economic development. Therefore, all countries in the world regard the development of new energy and renewable and sustainable energy as an important way to solve energy and environmental problems. Photovoltaic power generation directly converts solar energy into electricity, providing a practical and sustainable solution to the growing global energ...

AI Technical Summary

Problems solved by technology

However, in the liquid phase preparation, represented by hydrazine and oleylamine, there is a certain toxicity, and at the same time, there is a certain complexity and danger in the post-selenization process of adding selenium sources. Therefore, it is necessary to find a simple preparation process. Environmental protection, non-toxic preparation process

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