期刊
CHEMISTRYOPEN
卷 5, 期 3, 页码 201-205出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/open.201500214
关键词
anisotropy; exciton diffusion; optoelectronics; organic solar cells; tetracene
资金
- National Natural Science Foundation of China [21373109]
We observe the diffusion anisotropy difference between singlet and triplet excitons in organic crystals; that is, singlet and triplet excitons may have completely different spatial direction preference for diffusion. This phenomenon can be ascribed to the distinct dependence of different excitonic couplings (Coulomb Forster vs. exchange Dexter) existing in singlet and triplet excitons on their intermolecular distance and intermolecular orientation. Such a discovery provides insights for understanding the fundamental photophysical process in a vast range of organic condensed-phase systems and optimizing the efficiency of organic optoelectronic materials.
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