Cadmium-telluride thin-film solar battery and preparation method thereof

Abstract

The invention, which belongs to the technical field of the solar battery, discloses a cadmium-telluride thin-film solar battery comprising a glass substrate, a lamination structure, a transparent conductive layer, a buffer layer, an n type semiconductor layer, a p type semiconductor layer, a back contact layer and a back electrode layer. The lamination structure, the transparent conductive layer, the buffer layer, the n type semiconductor layer, the p type semiconductor layer, the back contact layer and the back electrode layer are arranged on the glass substrate successively along a direction far away from the glass substrate. The lamination structure consist of an inhibition layer and a dielectric medium layer; the inhibition layer is arranged on the glass substrate; the dielectric medium layer is arranged between the inhibition layer and the transparent conductive layer; the inhibition layer contains Si and O elements as well as at least one of a Al element and a B element and at least one of a Li element and a K element; and the inhibition layer and the dielectric medium layer have light-transmitting properties. In addition, the invention also discloses a preparation method for the cadmium-telluride thin-film solar battery. The lamination layer structure is set and is used as a front contact element of the cadmium-telluride thin-film solar battery, so that the short-circuit current of the cadmium-telluride thin-film solar battery is increased.

Description

technical field [0001] The invention belongs to the technical field of thin-film solar cells, and in particular relates to a cadmium telluride thin-film solar cell and a preparation method thereof. Background technique [0002] With the global warming, the deterioration of the ecological environment and the shortage of conventional energy, more and more countries have begun to vigorously develop solar energy utilization technology. Solar photovoltaic power generation is a zero-emission clean energy, which has the advantages of safety, reliability, no noise, no pollution, inexhaustible resources, short construction period, and long service life, so it has attracted much attention. Cadmium telluride is a P-type semiconductor material with a direct band gap and a high absorption coefficient. As a new generation of thin-film solar cells, cadmium telluride thin-film solar cells have the advantages of low cost, stable performance, strong radiation resistance, and power generation...

AI Technical Summary

Problems solved by technology

If the substrate 1' is a glass substrate, the sodium ions in the glass substrate 1' will diffuse into the transparent conductive layer 2' when the transparent conductive layer 2' is heat-treated, which will cause the performance of the transparent conductive layer 2' to decline; When the window layer 4´, the CdTe light absorbing layer 5´ and the subsequent heat treatment of the light absorbing layer 5´ are deposited on the glass substrate 1´, these will cause the sodium ions in the glass substrate 1´ to diffuse into the CdTe light Absorber layer 5´, which will cause deterioration of thin film solar cell performance, which will reduce the conversion efficiency of the cell

In addition, the short-circuit current of traditional cadmium telluride thin-film solar cells needs to be improved

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