Highly efficient, dual state emission from an organic semiconductor

• Main Authors: Reineke, Sebastian (Contributor), Seidler, Nico (Author), Yost, Shane R. (Contributor), Prins, Ferry (Contributor), Tisdale, William (Author), Baldo, Marc A (Author)
• Other Authors: Massachusetts Institute of Technology. Department of Chemical Engineering (Contributor), Massachusetts Institute of Technology. Department of Chemistry (Contributor), Massachusetts Institute of Technology. Department of Electrical Engineering and Computer Science (Contributor), Massachusetts Institute of Technology. Energy Frontier Research Center for Excitonics (Contributor), Tisdale, William A. (Contributor), Baldo, Marc A. (Contributor)
• Format: Article
• Language: English
• Published: American Institute of Physics (AIP), 2014-03-28T16:38:03Z.
• Subjects: Article
• Online Access: Get fulltext

We report highly efficient, simultaneous fluorescence and phosphorescence (74% yield) at room temperature from a single molecule ensemble of (BzP)PB [N,N'-bis(4-benzoyl-phenyl)-N,N'-diphenyl-benzidine] dispersed into a polymer host. The slow phosphorescence (208 ms lifetime) is very efficient (50%) at room temperature and only possible because the non-radiative rate for the triplet state is extremely low (2.4 × 10[superscript 0] s[superscript −1]). The ability of an organic molecule to function as an efficient dual state emitter at room temperature is unusual and enables a wide range of applications including the use as broadband down-conversion emitters, optical sensors and attenuators, exciton probes, and spin-independent intermediates for Förster resonant energy transfer.
United States. Dept. of Energy. Office of Basic Energy Sciences (Award DE-SC0001088)