Solar battery

Abstract

The invention provides a solar battery comprising a base plate which comprises a p-n doping structure formed in the base plate, back material which is attached on the base plate, and comprises glass mixture, organic medium, aluminized material and additive, wherein the glass mixture comprises Al2O3, Bi2O5, B2O3, SiO2, PbO, Tl2O3 and ZnO, the content of aluminium powder in the material is 60-80%, the degree of purity is about 90-99.99%, the additive comprises stearic acid of C10-C24, whose content is smaller than 5%, the content of the organic medium is about 20-35%, and comprises 60-90%alcohol ether organic solvent, 10-20%cellulose resin and 1-5% advection agent, rheologic agent or thixotropic agent. The solar battery of the invention can improve the bending of the silicon base plate caused by stress.

Description

technical field [0001] The present invention provides a solar cell (Solar Cell), especially related to forming a uniform aluminum-silicon eutectic layer on the back of a silicon chip (wafer) to reduce the structural stress produced by a thinned solar cell, thereby effectively improving The bending phenomenon of the silicon substrate due to stress. Background technique [0002] In recent years, based on the rapid development of industry, the rapid depletion of petrochemical energy has led to increasingly serious environmental pollution. Therefore, all countries in the world are committed to the development of alternative energy sources for energy needs and environmental protection reasons. Solar energy is the most abundant resource available to human beings today. It has the advantages of no transportation cost, clean and no heat load on the earth. Based on the above advantages, solar energy has become one of the most promising clean renewable energy sources. [0003] A so...

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Problems solved by technology

[0008] However, the cost of the LFC manufacturing process is relatively h

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