Preparation method of Cu-Im-Ga-Se quaternary semiconductor alloy

Abstract

The invention aims to provide a preparation method of a Cu-Im-Ga-Se quaternary semiconductor alloy. The preparation method comprises the concrete steps: placing a quartz crucible with Cu-Im-Ga raw materials in a vacuum induction furnace, vacuumizing, introducing argon, controlling the vacuum degree of the induction furnace at 20-30mmHg, gradually heating to 500-700 DEG C, then, heating to 900-1100 DEG C, melting for 10-30min, and cooling in the furnace to obtain a Cu-Im-Ga ternary alloy; respectively filling the prepared Cu-Im-Ga ternary alloy and Se powder at two ends of a quartz tube, vacuumizing, and sealing the quartz tube; heating the Cu-Im-Ga-Se filling end of the quartz tube to 850-950 DEG C by using a tube furnace; heating the Se powder filling end of the quartz tube to 300-330 DEG C by using the tube furnace, and preserving the temperature for 0-20min; preserving the temperature of 300-500 DEG C for 1-20h; heating from 500 DEG C to 750 DEG C; cooling the Cu-Im-Ga-Se filling end to 750 DEG C when the temperature at the Se powder filling end is up to 750 DEG C, and reacting Im with Se at the temperature of 750 DEG C for 5-60h; and shutting off the tube furnace to stop heating, and cooling to the room temperature to obtain a solid Cu-Im-Ga-Se sample.

Description

technical field [0001] The invention belongs to the field of alloys, and particularly provides a copper indium gallium selenium quaternary semiconductor alloy and a preparation method thereof. Background technique [0002] With the rapid development of society and economy, people's demand for energy is increasing day by day, and people have paid great attention to renewable energy such as solar energy, wind energy, water energy, and biomass energy. As a representative of renewable energy, solar energy has received extensive attention. Solar cells have been extensively studied in recent years as a tool for converting light energy into electricity. At present, the photoelectric conversion efficiency of small-area silicon-based solar cells is 25%, and the photoelectric conversion efficiency of large-area silicon-based solar cells can reach 10%, which has been commercialized; however, silicon solar cells also have big problems, mainly It is the efficiency attenuation and the p...

AI Technical Summary

Problems solved by technology

Although the preparation of copper indium gallium selenide by the selenization method can obtain relatively good copper indium gallium selenide thin films, the preparation cycle of this method is long, the energy consumption is high, and the selenium vapor is highly toxic, so the safety requirements are high