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Evaluation of nonradiative carrier recombination loss in concentrator heterostructure solar cells

Research Project Outline

By using time- and space-resolved laser spectroscopy, we evaluate nonradiative carrier recombination loss, such as bulk recombination, interface and surface recombination, and Auger recombination, in concentrator solar cells consisting of multi-junction heterostructures and nanostructures, and find ways to high efficiencies of light energy conversion. In addition, we study multiexciton generation rate, Auger recombination rate, and carrier extraction rate, which compete in nanostructure solar cells, in order to examine experimentally a long-standing issue whether one-photon to multi-electron conversion processes can be effectively utilized.

Research Director
Professor, Kyoto University
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Research Area
Creative research for clean energy generation using solar energy
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