Intermolecular Singlet Fission in Unsymmetrical Derivatives of Pentacene in Solution
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چکیده
منابع مشابه
Singlet fission in pentacene dimers.
Singlet fission (SF) has the potential to supersede the traditional solar energy conversion scheme by means of boosting the photon-to-current conversion efficiencies beyond the 30% Shockley-Queisser limit. Here, we show unambiguous and compelling evidence for unprecedented intramolecular SF within regioisomeric pentacene dimers in room-temperature solutions, with observed triplet quantum yields...
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Singlet fission, the splitting of one singlet into two triplets, can potentially increase the efficiency of optoelectronic devices beyond conventional limits. Among the singlet fission molecules discovered to date, two mechanisms have emerged: intraor intermolecular singlet fission. Here we show a combined intrato intermolecular singlet fission mechanism in the model system of diphenyl-dicyano-...
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By creating two triplet excitons from one photo-excited singlet exciton, singlet fission in organic semiconductors has drawn tremendous attention for its potential applications in boosting the efficiency of solar conversion. Here, we show that this carrier-multiplication effect can also be used to dramatically improve the nonlinear optical response in organic materials. We have observed large o...
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We extend our previous work on singlet exciton fission in isolated dimers to the case of crystalline materials, focusing on pentacene as a canonical and concrete example. We discuss the proper interpretation of the character of low-lying excited states of relevance to singlet fission. In particular, we consider a variety of metrics for measuring charge-transfer character, conclusively demonstra...
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Electronic factors controlling singlet fission (SF) rates are investigated in four-chromophore model systems comprising two covalently linked dimers of tetracene. By using adiabatic framework and wave function analysis tools, we show that the lowest singlet multiexciton states are localized on the individual molecules. The intermolecular ME states, in which the triplet excitons reside on separa...
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ژورنال
عنوان ژورنال: Advanced Energy Materials
سال: 2018
ISSN: 1614-6832
DOI: 10.1002/aenm.201802221