Management of triplet excitons transition: fine regulation of Forster and dexter energy transfer simultaneously.

ABSTRACT: Understanding and management of triplet excitons transition in the same molecule remain a great challenge. Hence, for the first time, by host engineering, manageable transitions of triplet excitons in a naphthalimide derivative NDOH were achieved, and monitored through the intensity ratio (I_TADF/I_RTP) between thermally activated delayed fluorescence (TADF) and room-temperature phosphorescence (RTP). Energy differences between lowest triplet excited states of host and guest were changed from 0.03 to 0.17 eV, and I_TADF/I_RTP of NDOH decreased by 200 times, thus red shifting the afterglow color. It was proposed that shorter conjugation length led to larger band gaps of host materials, thus contributing to efficient Dexter and inefficient Förster ener

SUBMITTER: Wang J 

PROVIDER: S-EPMC10828450 | biostudies-literature | 2024 Jan

REPOSITORIES: biostudies-literature