Premium
Combining Charge‐Transfer Pathways to Achieve Unique Thermally Activated Delayed Fluorescence Emitters for High‐Performance Solution‐Processed, Non‐doped Blue OLEDs
Author(s) -
Chen XuLin,
Jia JiHui,
Yu Rongmin,
Liao JianZhen,
Yang MingXue,
Lu CanZhong
Publication year - 2017
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.201709125
Subject(s) - oled , fluorescence , intramolecular force , photochemistry , doping , acceptor , quenching (fluorescence) , quantum efficiency , diode , materials science , optoelectronics , chemistry , nanotechnology , organic chemistry , optics , physics , layer (electronics) , condensed matter physics
Two efficient blue thermally activated delayed fluorescence compounds, B‐oCz and B‐oTC , composed of ortho‐donor (D)–acceptor (A) arrangement were designed and synthesized. The significant intramolecular D–A interactions induce a combined charge transfer pathway and thus achieve small Δ E ST and high efficiencies. The concentration quenching can be effectively inhibited in films of these compounds. The blue non‐doped organic light emitting diodes (OLEDs) based on B‐oTC prepared from solution processes shows record‐high external quantum efficiency (EQE) of 19.1 %.