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【奖励】本帖被评价61次，作者daruozhi增加金币 47.4 个

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daruozhi

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[资源] 《Science》关于有机太阳能电池的最新文章：OPV外量子效率逾100%

Science, 2013, April 19, 刊文：
Singlet exciton fission transforms a molecular singlet excited state into two triplet states, each with half the energy of the original singlet. In solar cells, it could potentially double the photocurrent from high-energy photons. It was demonstrated that organic solar cells that exploit singlet exciton fission in pentacene to generate more than one electron per incident photon in a portion of the visible spectrum. Using a fullerene acceptor, a poly(3-hexylthiophene) exciton confinement layer, and a conventional optical trapping scheme, we show a peak external quantum efficiency of (109 +/- 1)% at wavelength λ = 670 nanometers for a 15-nanometer-thick pentacene film. The corresponding internal quantum efficiency is (160 +/- 10)%. Analysis of the magnetic field effect on photocurrent suggests that the triplet yield approaches 200% for pentacene films thicker than 5 nanometers.[ Last edited by daruozhi on 2013-4-26 at 15:14 ]

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附件 1 : Science_2013_ExternalQuantumEfficiencyAbove100%inaSinglet-Exciton-Fission–BasedOrganicPhotovoltaicCell.pdf

2013-04-26 15:05:31, 718.96 K