A fluorene-bridged double carbonyl/amine multiresonant thermally activated delayed fluorescence emitter for efficient green OLEDs

Sen Wu; Ya-Nan Hu; Dianming Sun; Kai Wang; Xiao-Hong Zhang; Eli Zysman-Colman

doi:10.1039/d3cc05761e

A fluorene-bridged double carbonyl/amine multiresonant thermally activated delayed fluorescence emitter for efficient green OLEDs

Chem Commun (Camb). 2024 Feb 27;60(18):2489-2492. doi: 10.1039/d3cc05761e.

Authors

Sen Wu¹, Ya-Nan Hu², Dianming Sun¹, Kai Wang², Xiao-Hong Zhang^{2

3}, Eli Zysman-Colman¹

Affiliations

¹ Organic Semiconductor Centre, EaStCHEM School of Chemistry, University of St Andrews, St Andrews, Fife KY16 9ST, UK. eli.zysman-colman@st-andrews.ac.uk.
² Institute of Functional Nano & Soft Materials (FUNSOM), Joint International Research Laboratory of Carbon-Based Functional Materials and Devices, Soochow University, Suzhou, Jiangsu 215123, P. R. China. xiaohong_zhang@suda.edu.cn.
³ Jiangsu Key Laboratory of Advanced Negative Carbon Technologies, Soochow University, Suzhou, Jiangsu, 215123, P. R. China.

PMID: 38196344
DOI: 10.1039/d3cc05761e

Abstract

Herein, we report a fluorene-bridged double carbonyl/amine-based MR TADF emitter DDiKTa-F, formed by locking the conformation of the previously reported compound DDiKTa. Using this strategy, DDiKTa-F exhibited narrower, brighter, and red-shifted emission. The OLEDs with DDiKTa-F emitted at 493 nm and showed an EQE_max of 15.3% with an efficiency roll-off of 35% at 100 cd m^-2.