Patent ID: 8878050
Filing Date: 2014-11-04
Classification: H01L,Y02E

Abstract:
1. A composite photovoltaic device comprising: a transparent substrate having a front side and a back side; a first solar cell formed on the front side of the transparent substrate and a second solar cell formed on the back side of the transparent substrate; the first solar cell made of a first material and having the first light-receiving surface, a second solar cell made of a second material and having a second light-receiving surface, an area of said first light-receiving surface of said first solar cell being larger than an area of said second light-receiving surface of said second solar cell the first light-receiving surface of the first solar cell being exposed to the Sun radiation, the first solar cell having a first thickness providing photo-active absorption and photoelectric conversion of a first portion of the Sun radiation and transmitting a second portion of the Sun radiation; a concentrating parabolic collector attached to the back side of the transparent substrate, the parabolic collector having a reflective surface facing the back side of the transparent substrate and receiving said second portion of the Sun radiation; the second light-receiving surface of the second solar cell facing the reflective surface of the parabolic collector and receiving a concentrated second portion of the Sun radiation reflected from the reflectvie surface of the parabolic collector the second solar cell having a second thickness providing photo-active absorption and photoelectric conversion of said concentrated second portion of the Sun radiation.