Low-light-induced-degradation solar cell front side silver paste and preparation method thereof

Abstract

The invention discloses low-light-induced-degradation solar cell front side silver paste and a preparation method thereof. According to the technical scheme, the low-light-degradation solar cell front side silver paste is composed of, by mass percentage, 80-93% of silver powder, 5-15% of organic carrier and 0.5-6% of glass powder, wherein the purity of the silver powder is 99.9-99.999%, the average particle size is 0.5-10 microns, the preferred average particle size is 0.5-3 microns, and the glass powder is TPBC glass powder. The preparation method of the low-light-degradation solar cell front side silver paste includes the following steps: (1) preparing organic carrier; (2) preparing glass powder; (3) mixing silver paste; and (4) dispersing silver paste. The advantage is that the invention relates to a novel tellurate glass powder system, the glass powder is a Te-Pb-Bi-Ga glass system, and the TPBC glass system uses a tellurium-plumbum-bismuth compound combination. A certain amount of Ga element is intentionally added to the glass component in order to reduce the light induced degradation of silicon wafers. Experiments show that the rate of light induced degradation is reduced while the photoelectric conversion efficiency of silicon-based cells is improved.

Description

technical field [0001] The present invention relates to a kind of solar cell slurry and preparation method thereof, more specifically, it relates to a kind of low light attenuation solar cell positive silver paste and preparation method thereof. Background technique [0002] With the shortage of fossil energy and people's concern about carbon dioxide emissions, solar power generation technology has been developed by leaps and bounds. As the main body of solar power generation technology, crystalline silicon solar cell technology has always attracted people's attention, and its photoelectric conversion efficiency has been continuously improved. [0003] The quality of solar cells depends on the carrier concentration, distribution and mobility in the crystalline silicon material used, and is also affected by the performance of the positive and negative electrodes of the battery. The front electrode directly affects the series resistance, shunt resistance, fill factor and phot...

AI Technical Summary

Problems solved by technology

However, due to the extremely small segregation coefficient of Ga in silicon (K0=0.008), the resistance of the grown silicon single crystal rod changes greatly, and the availability rate decreases, which is not conducive to large-scale promotion

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