Exciton Lifetime Paradoxically Enhanced by Dissipation and Decoherence: Toward Efficient Energy Conversion of a Solar Cell

Yasuhiro Yamada, Youhei Yamaji, Masatoshi Imada

研究成果: Article査読

9 被引用数 (Scopus)

抄録

Energy dissipation and decoherence are at first glance harmful to acquiring the long exciton lifetime desired for efficient photovoltaics. In the presence of both optically forbidden (namely, dark) and allowed (bright) excitons, however, they can be instrumental, as suggested in photosynthesis. By simulating the quantum dynamics of exciton relaxations, we show that the optimized decoherence that imposes a quantum-to-classical crossover with the dissipation realizes a dramatically longer lifetime. In an example of a carbon nanotube, the exciton lifetime increases by nearly 2 orders of magnitude when the crossover triggers a stable high population in the dark excitons.

本文言語English
論文番号197701
ジャーナルPhysical Review Letters
115
19
DOI
出版ステータスPublished - 2015 11 6
外部発表はい

ASJC Scopus subject areas

  • 物理学および天文学(全般)

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