2023
DOI: 10.1039/d3ta00193h
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Intramolecular singlet fission and triplet exciton harvesting in tetracene oligomers for solar energy conversion

Abstract: Singlet fission (SF), which could convert one singlet exciton into two triplet excitons, has the potential for enhancing the solar energy conversion efficiency, such as photovoltaic cell and photocatalysis. Recently,...

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Cited by 14 publications
(12 citation statements)
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“…[9,11,14,20,44,52,58,[67][68][69][70] In general, delocalization plays a major role in the dynamics of SF, as it is not only relevant for the triplet dissociation, but also for the initial event of SF. [71] As triplet excited states are more localized compared to singlet excited states (which translates to an increased number of available microstates for 1 (T 1 T 1 ) compared to (S 1 S 0 )), the first event of SF also entails a gain in entropy in extended systems. [51,63] Such effects are, however, predominantly observed in solidstate systems, and they are less significant in solution where excited states are confined within the molecular structure.…”
Section: Introductionmentioning
confidence: 99%
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“…[9,11,14,20,44,52,58,[67][68][69][70] In general, delocalization plays a major role in the dynamics of SF, as it is not only relevant for the triplet dissociation, but also for the initial event of SF. [71] As triplet excited states are more localized compared to singlet excited states (which translates to an increased number of available microstates for 1 (T 1 T 1 ) compared to (S 1 S 0 )), the first event of SF also entails a gain in entropy in extended systems. [51,63] Such effects are, however, predominantly observed in solidstate systems, and they are less significant in solution where excited states are confined within the molecular structure.…”
Section: Introductionmentioning
confidence: 99%
“…In general, delocalization plays a major role in the dynamics of SF, as it is not only relevant for the triplet dissociation, but also for the initial event of SF [71] . As triplet excited states are more localized compared to singlet excited states (which translates to an increased number of available microstates for 1 (T 1 T 1 ) compared to (S 1 S 0 )), the first event of SF also entails a gain in entropy in extended systems [51,63] .…”
Section: Introductionmentioning
confidence: 99%
“…Condition 2 would prevent the triplettriplet annihilation (TTA) process. 10 Although many efforts have been devoted, the number of SF chromophores is still limited, 11,12 which greatly hinders the basic research and practical application of SF. Therefore, it is necessary and urgent to expand the molecular library of SF chromophores.…”
Section: Introductionmentioning
confidence: 99%
“…32% to over 45%. , When SF occurs, a chromophore in its singlet excited state (S 1 ) interacts with a nearby chromophore in its ground state (S 0 ), forming a spin-correlated triplet pair state 1 (T 1 T 1 ). Subsequently, the triplet pair can undergo decorrelation, resulting in two noninteracting, free triplet states (T 1 + T 1 ). These triplets are then available for completing the process of solar energy conversion. , …”
Section: Introductionmentioning
confidence: 99%