Enhancing the statistical probability factor in triplet-triplet annihilation photon upconversion <i>via</i> TIPS functionalization.

ABSTRACT: We investigated the influence of triisopropylsilyl (TIPS) functionalization on annihilators in triplet-triplet annihilation photon upconversion, specifically focusing on their spin statistical probability factor. A new green-emitting annihilator 3,9-bis((triisopropylsilyl)ethynyl)perylene (TIPS-PY) displaying a record red-to-green TTA-UC quantum yield of 13.7% (50% theoretical maximum) was synthesized. This remarkable efficiency was achieved due to the following features of the TIPS functionalization of PY: (1) retaining a high fluorescence quantum yield of 95%, (2) reduced triplet energy to 1.29 eV enabling efficient triplet energy transfer (∼100%) from the sensitizer PdTPBP (T₁ = 1.55 eV), and (3) a high efficiency of singlet generation after triplet coupling, indicated by the

SUBMITTER: Naimovicius L 

PROVIDER: S-EPMC12519238 | biostudies-literature | 2025 Nov

REPOSITORIES: biostudies-literature