The statistical probability factor in triplet mediated photon upconversion: a case study with perylene.

ABSTRACT: Triplet-triplet annihilation photon upconversion (TTA-UC) is a process where two low-energy photons are converted into one higher-energy photon. A crucial component for an efficient upconversion process is the statistical probability factor (f), defined as the probability of the formation of a high-energy singlet state upon coupling of two low-energy triplet states. Theoretically, f depends on the energy level distribution, molecular orientation, inter-triplet exchange coupling of triplet dyads, and spin-mixing of resulting spin states (singlet, triplet, and quintet). However, experimental values of f for acene-based annihilators have been subject to large variations due to many factors that have resulted in the reporting of different f values for the same molec

SUBMITTER: Naimovicius L 

PROVIDER: S-EPMC10621484 | biostudies-literature | 2023 Nov

REPOSITORIES: biostudies-literature