期刊
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
卷 131, 期 33, 页码 11819-11824出版社
AMER CHEMICAL SOC
DOI: 10.1021/ja903100p
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资金
- Swedish Energy Agency
- Knut and Alice Wallenberg Foundation
- IWT-project Polyspec
In this article we report the weak but omnipresent electroluminescence (EL) from several types of organic polymer:fullerene bulk heterojunction solar cells biased in the forward direction. The light emitted from blends of Some commonly used polymers and the fullerene molecule is significantly different from that of any of the pure materials comprising the blend. The lower energy of the blend EL is found to correlate with both the voltage onset of emission and the open-circuit voltage of the photovoltaic cell under solar illumination. WE., accordingly interpret the emission to originate from interfacial charge transfer state recombination and emphasize EL as a very valuable tool to characterize the charge transfer state present in donor/acceptor organic photovoltaic (OPV) cells.
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