CASCADE SOLAR CELL Russian patent published in 2007 - IPC H01L31/42 

FIELD: solar power engineering.

SUBSTANCE: proposed cascade solar cell has substrate, solar-cell p-n junction multistrate disposed on top side of substrate, bottom and top contact electrodes disposed on bottom side of substrate and on top part of p-n junction multistrate, respectively. Multistrate jointly with substrate is divided into solar cell cascades. Bottom cascade that functions as bottom p-n junction is built integral with substrate that functions as base and has layer of reverse polarity of conductivity relative to that of substrate and functions as emitter; bottom solar cell cascade is made of silicon; composite buffer incorporated in p-n junction multistrate is optically translucent in spectral silicon photoelectric conversion region and matches constant silicon lattices with material of intermediate cascade that functions as intermediate p-n junction or that of top cascade that functions as top p-n junction. Substrate that functions as base is made of p-type silicon.

EFFECT: enhanced efficiency and strength, reduced mass and cost of solar cell.

6 cl, 2 dwg