High-Efficiency Photoelectric Conversion in Graphene--Diamond Hybrid Structures: Model and First-Principles Calculations
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概要
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We theoretically investigate the possibility of multiple exciton-generation in graphene nanostructures using tight-binding calculations. We show that multiple-exciton generation occurs in graphene nanoribbons with armchair edges wherein the efficiency of photoelectric conversion exceeds 100%. From first-principles calculations, we demonstrate that the graphene--diamond hybrid structure is a possible and robust nanostructure that can achieve multiple-exciton generation.
- 2013-04-25
著者
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Okada Susumu
Graduate School of Pure and Applied Sciences and Center for Computational Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8571, Japan
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Konabe Satoru
Graduate School of Pure and Applied Sciences, University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan
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Okada Susumu
Graduate School of Pure and Applied Sciences, University of Tsukuba, Tsukuba, Ibaraki 305-8571, Japan
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Otani Minoru
National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba, Ibaraki 305-8568, Japan
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Cuong Nguyen
National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba, Ibaraki 305-8568, Japan
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Konabe Satoru
Graduate School of Pure and Applied Sciences, University of Tsukuba, Tsukuba, Ibaraki 305-8571, Japan
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