Sulfur-Embedded Pure Green Multiple Resonance TADF Emitters: Optimizing Photophysical and Electroluminescent Properties.

ABSTRACT: Two pure green multiple resonance thermally activated delayed fluorescence (MR-TADF) emitters are reported here by utilizing benzothienocarbazole groups with sulfur atoms connecting with the 3-position carbon atoms of carbazole units, which are named Th-Cz-BN3 and Th-Cz-BN6. Although their molecular structures are similar, significant differences in energy splitting and spin-orbit coupling between the singlet and triplet excited states are exhibited, resulting from the differences in steric configurations and consequent electronic structures. The Th-Cz-BN3 and Th-Cz-BN6-based devices display pure green emission with Commission Internationale de L'Eclairage (CIE) y values exceeding 0.7 and maximum external quantum efficiencies of over 34.0%. Moreover, the Th-Cz-BN3-based non-sensitized devi

SUBMITTER: Jiang C 

PROVIDER: S-EPMC12806378 | biostudies-literature | 2026 Jan

REPOSITORIES: biostudies-literature