Woon, Kai Lin and Hasan, Z.A. and Ong, B.K. and Ariffin, Azhar and Griniene, R. and Grigalevicius, S. and Chen, S.A. (2015) Triplet states and energy back transfer of carbazole derivatives. RSC Advances, 5 (74). pp. 59960-59969. ISSN 2046-2069, DOI https://doi.org/10.1039/c5ra09340f.
Full text not available from this repository.Abstract
Intermolecular interactions among π conjugated semiconducting molecules often give rise to totally different optical behaviours between the solid state and dilute phases. Phosphorescence spectra observed in the solid state are often lowered compared with dilute forms resulting in the red-shift of the phosphorescence spectra. Here, we demonstrate that this red-shift can be reduced by introducing side groups. We also show that such a shift is a function of interchromophoric distance with fast exponential decay. Furthermore, we show conclusively that triplet exciton transfer between the hosts and the bis[2-(4F,6-difluorophenyl)pyridinato-C2,N](picolinato)iridium(iii) can be described in terms of the Boltzmann factor using triplet energies obtained from the solid state. These results will have implications in molecular design that utilizes triplet excitons such as organic light emitting diodes and singlet fission solar cells.
| Item Type: | Article |
|---|---|
| Funders: | UNSPECIFIED |
| Uncontrolled Keywords: | Doppler effect; Excitons; Light emission; Light emitting diodes; Phosphorescence |
| Subjects: | Q Science > Q Science (General) Q Science > QC Physics Q Science > QD Chemistry |
| Divisions: | Faculty of Science > Department of Chemistry Faculty of Science > Department of Physics |
| Depositing User: | Ms. Juhaida Abd Rahim |
| Date Deposited: | 26 Sep 2018 07:34 |
| Last Modified: | 27 Aug 2019 06:19 |
| URI: | http://eprints.um.edu.my/id/eprint/19430 |
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