Generating Long-Lived Triplet Excited States in Narrow Bandgap Conjugated Polymers.

ABSTRACT: Narrow bandgap conjugated polymers are a heavily studied class of organic semiconductors, but their excited states usually have a very short lifetime, limiting their scope for applications. One approach to overcome the short lifetime is to populate long-lived triplet states for which relaxation to the ground state is forbidden. However, the triplet lifetime of narrow bandgap polymer films is typically limited to a few microseconds. Here, we investigated the effect of film morphology on triplet dynamics in red-emitting conjugated polymers based on the classic benzodithiophene monomer unit with the solubilizing alkyl side chains C₁₆ and C₂C₆ and then used Pd porphyrin sensitization as a further strategy to change the triplet dynamics. Using transient absorpti

SUBMITTER: Marin-Beloqui JM 

PROVIDER: S-EPMC9936540 | biostudies-literature | 2023 Feb

REPOSITORIES: biostudies-literature