Monolithic multiple solar cells

摘要

A monolithic multiple solar cell includes at least three partial cells, with a semiconductor mirror placed between two partial cells. The aim of the invention is to improve the radiation stability of said solar cell. For this purpose, the semiconductor mirror has a high degree of reflection in at least one part of a spectral absorption area of the partial cell which is arranged above the semiconductor mirror and a high degree of transmission within the spectral absorption range of the partial cell arranged below the semiconductor mirror.

主权项

1. A solar cell comprising:
a first cell absorbing a first portion of incident light to thereby generate a first current; a second cell formed of GaInNAs, the second cell arranged below the first cell in a direction of the incident light, the second cell absorbing a second portion of the incident light to thereby generate a second current; a semiconductor mirror arranged below the second cell in the direction of incident light, the semiconductor mirror reflecting a non-absorbed portion of the second portion of light back towards the second cell thereby the absorption of the second portion of the incident light is increased in the second cell, the semiconductor mirror comprising a plurality of layers; and a third cell formed of Ge, the third cell arranged below the semiconductor mirror, the third cell absorbing a third portion of the incident light to thereby generate a third current.