期刊
ADVANCED MATERIALS
卷 26, 期 31, 页码 5569-5574出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adma.201400563
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资金
- Research Grants Council of the Hong Kong Special Administrative Region, China [T23-713/11]
- National Natural Science Foundation of China [21303150]
Charge transfer and interactions at organic heterojunctions (OHJs) are known to have critical influences on various properties of organic electronic devices. In this Research News article, a short review is given from the electronic viewpoint on how the local molecular interactions and interfacial energetics at P/N OHJs contribute to the recombination/dissociation of electron-hole pairs. Very often, the P-type materials donate electrons to the N-type materials, giving rise to charge-transfer complexes (CTCs) with a P delta+-N(delta-)configuration. A recently observed opposite charge-transfer direction in OHJs is also discussed (i.e., N-type material donates electrons to P-type material to form P delta--N delta+). Recent studies on the electronic structures of CTC-forming material pairs are also summarized. The formation of P delta--N delta+-type CTCs and their correlations with exciplex emission are examined. Furthermore, the potential applications of CTCs in NIR photovoltaic devices are reviewed.
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