Vibronic Trimer Design Enhancing Intramolecular Triplet-Exciton Hopping to Accelerate Triplet-Triplet Annihilation for Photon Upconversion.

ABSTRACT: Photon upconversion via triplet-triplet annihilation (TTA-UC) is a well-known process that converts low-energy light into higher-energy light. This process has attracted attention for its potential in various fields, including light-emitting devices, power generation and medical applications. It is desirable to develop TTA-UC materials of TTA emitters with large TTA rate constants (k_TTA). However, molecular design to accelerate the bimolecular rate constant of k_TTA has not been considered. We present a strategy to manipulate k_TTA by assembling multiple chromophores linked to a boron in a rotationally symmetric manner, causing asymmetric motions by a localized triplet exciton. We have studied tri(9-anthryl)borane, which consists of three anthracenes linked v

SUBMITTER: Higashi K 

PROVIDER: S-EPMC12281095 | biostudies-literature | 2025 Jul

REPOSITORIES: biostudies-literature