Journal
PHYSICAL REVIEW LETTERS
Volume 112, Issue 23, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.112.238701
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Funding
- Engineering and Physical Sciences Research Council [EP/J017361/1, EP/G060738/1]
- E. Oppenheimer Foundation
- St. Catharine's College, Cambridge
- NSF [CMMI-1255494]
- NSF
- H/NIGMS via NSF [DMR-133220]
- EPSRC [EP/J017361/1, EP/G060738/1] Funding Source: UKRI
- Engineering and Physical Sciences Research Council [EP/G060738/1, EP/J017361/1, 1208395] Funding Source: researchfish
- Directorate For Engineering [1255494] Funding Source: National Science Foundation
- Div Of Civil, Mechanical, & Manufact Inn [1255494] Funding Source: National Science Foundation
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We report the simultaneous observation of geminate and nongeminate 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 triplet excitons undergoing bimolecular triplet-triplet annihilation. We show that the two processes give rise to distinct magnetic resonance spectra, and estimate the interaction between geminate triplet excitons to be 60 neV.
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