Purely organic room-temperature phosphorescence sensitizers for highly efficient hyperfluorescence OLEDs.

ABSTRACT: Multiresonance thermally activated delayed fluorescence (MR-TADF) emitters are promising candidates for organic light-emitting diodes (OLEDs) with high color quality. However, in most cases, noble metal-containing phosphors are required as sensitizers for MR-TADF emitters to improve their electroluminescence (EL) performances, which may lead to high cost and environmental pollution. Herein, an efficient purely organic room-temperature phosphorescence (RTP) material, 3,2-PIC-TXT, with fast phosphorescence radiation is developed. It not only exhibits impressive EL performances as an emitter with an outstanding external quantum efficiency (EQE) of 33.2%, higher than that of Ir(ppy)₃ (25.2%), but also functions remarkably as a sensitizer for green MR-TADF emitters (BN2, tCzphB-Ph, a

SUBMITTER: Zeng J 

PROVIDER: S-EPMC11927617 | biostudies-literature | 2025 Mar

REPOSITORIES: biostudies-literature