Multi-junction solar cell and power supply equipment

Abstract

The invention provides a multi-junction solar cell and power supply equipment. The multi-junction solar cell comprises a bottom cell; a first tunneling junction arranged on the bottom cell; a DBR reflecting layer positioned on one side, deviating from the bottom cell, of the first tunneling junction; and at least one sub-cell positioned on one side, deviating from the bottom cell, of the DBR reflecting layer, wherein at least one sub-cell comprises an AlGaInP back field layer, a sub-cell base region, a sub-cell emitting region and a sub-cell window layer which are sequentially stacked in the direction from the bottom cell to the sub-cell, and the AlGaInP back field layer is doped with Sb and Zn. The AlGaInP back field layer is doped with Sb and Zn so that the growth disorder degree of theAlGaInP material of the AlGaInP back field layer can be improved through Sb doping, the band gap of the AlGaInP material is increased, and the collection efficiency of carriers is improved; meanwhile,the resistivity of the AlGaInP back surface field layer is effectively reduced so that the concentrating application is facilitated and the performance of the multi-junction solar cell is improved.

Description

technical field [0001] The invention relates to the technical field of solar cells, and more specifically, to a multi-junction solar cell and power supply equipment. Background technique [0002] Solar cells convert solar energy directly into electricity and are the most efficient form of clean energy. III-V compound semiconductor solar cells have the highest conversion efficiency in the current material system, and have the advantages of good high temperature resistance and strong radiation resistance. They are recognized as a new generation of high-performance and long-life space main power supplies. Triple-junction solar cells with / Ge lattice-matched structure have been widely used in the aerospace field, but the performance of existing multi-junction solar cells still needs to be improved. Contents of the invention [0003] In view of this, the present invention provides a multi-junction solar cell and power supply equipment, which effectively solves the technical pr...

AI Technical Summary

Problems solved by technology

III-V compound semiconductor solar cells have the highest conversion efficiency in the current material system, and have the advantages of good high temperature resistance and strong radiation resistance. / Ge lattice-matched triple-junction solar cells have been widely used in the aerospace field, but the performance of existing multi-junction solar cells needs to be improved

Images