Journal
ADVANCED MATERIALS
Volume 26, Issue 35, Pages 6163-+Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adma.201402294
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Funding
- National Natural Science Foundation of China [21373109]
- National Basic Research Program of China [2011CB808604]
- European Research Council [615834]
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Direct optical excitation of long-range charge-transfer (CT) states in organic photovoltaics is shown to be feasible, a fact that is ascribed to the very low but non-vanishing oscillator strength of each individual transition and the much higher density of states (DOS) as compared with their short-range counterparts. This finding provides a new framework to interpret the low-energy absorption spectra of photovoltaic devices and to correlate this property with the optoelectronic conversion process in working devices.
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