Smart Stack Technology for III-V/Si Multi-Junction Solar Cells

Developing a handy strategy towards III-V/Si integration has been a longstanding challenge in the photovoltaic community, and its demand is rapidly increasing to prepare for the future demand of higher-efficiency solar cells. To this end, we have proposed “smart stack” technology, an approach using metal nanoparticle arrays to interconnect III-V and Si both electrically and optically. This presentation overviews the concept, process, and device demonstration of this technology, including some of the recent progress.