Geminate and non-geminate recombination of triplet excitons formed by singlet fission
Bayliss, Sam L
Walker, Brian J
Bruzek, Matthew J
Anthony, John E
Physical Review Letters
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Bayliss, S. L., Chepelianskii, A., Sepe, A., Walker, B. J., Ehrler, B., Bruzek, M. J., Anthony, J. E., & et al. (2014). Geminate and non-geminate recombination of triplet excitons formed by singlet fission. Physical Review Letters https://www.repository.cam.ac.uk/handle/1810/245372
We report the simultaneous observation of geminate and non-geminate triplet-triplet annihilation in a solution-processable small molecule, TIPS-tetracene, undergoing singlet exciton fission. Using optically detected magnetic resonance, we identify recombination of triplet pairs directly following singlet fission, as well as recombination of singlet excitons undergoing bimolecular triplet-triplet annihilation. We show that the two processes give rise to distinctive magnetic resonance spectra, and estimate the interaction between geminate triplet excitons to be 60neV.
EPSRC [grant no. EP/J017361/1 and EP/G060738/1]. E. Oppenheimer Foundation and St. Catherine's College, Cambridge. NSF [CMMI- 1255494].
EPSRC (via Loughborough University) (EP/J017361/1)
This record's URL: https://www.repository.cam.ac.uk/handle/1810/245372