Quinolinylmethanone-Based Thermally Activated Delayed Fluorescence Emitters and the Application in OLEDs: Effect of Intramolecular H-Bonding

Vasudevan Thangaraji; Pachaiyappan Rajamalli; Jayachandran Jayakumar; Min-Jie Huang; Yu-Wei Chen; Chien-Hong Cheng

doi:10.1021/acsami.8b22704

Quinolinylmethanone-Based Thermally Activated Delayed Fluorescence Emitters and the Application in OLEDs: Effect of Intramolecular H-Bonding

ACS Appl Mater Interfaces. 2019 May 15;11(19):17128-17133. doi: 10.1021/acsami.8b22704. Epub 2019 May 3.

Authors

Vasudevan Thangaraji¹, Pachaiyappan Rajamalli¹, Jayachandran Jayakumar¹, Min-Jie Huang¹, Yu-Wei Chen¹, Chien-Hong Cheng¹

Affiliation

¹ Department of Chemistry , National Tsing Hua University , Hsinchu 30013 , Taiwan.

PMID: 31038911
DOI: 10.1021/acsami.8b22704

Abstract

Three new quinoline TADF emitters, 2QPM-mDC, 2QPM-mDTC, and 4QPM-mDTC, were designed and synthesized and the emitters show Δ E_ST as low as 0.07 eV and high PL quantum yield (PLQY) up to 98%. An electroluminescence device based on 2QPM-mDTC can reach high EQE over 24%. Compared with the reported TADF devices, the device shows narrow emission bandwidth and high color purity. The excellent device performance is likely ascribed to the molecular design of 2QPM-mDTC containing an intramolecular H-bonding in the molecule.

Keywords: H-bonding; OLEDs; TADF; narrow bandwidth; quinoline.