新概念高性能太陽電池の展開 : 第3世代太陽電池開発の現状(<特集>太陽電池開発の将来展望)

概要

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Present status of third generation photovoltaics is reviewed. Recently, inter-band solar cells, hot carrier solar cells or all silicon tandem solar cells have been proposed to overcome the efficiency limit of conventional solar cells, and this kind of new concepts is named as "the third generation solar cell". All silicon tandem solar cells are the most promising as the third generation solar cell, since silicon is abundant on the earth and nontoxic. To realize all silicon tandem solar cells, silicon quantum dots superlattice (Si-QDSL) is the most important structure since Si-QDSL enables us to obtain bandgap-controlled materials. Si-QDSL is composed of the aligned silicon quantum dots in a silicon-based wide gap material. In this paper, preparation techniques and preliminary optical properties of Si/SiO, Si/SiN and Si/SiC-QDSL's will be presented.
2008-03-20