Deep-Red to Near-Infrared Thermally Activated Delayed Fluorescence in Organic Solid Films and Electroluminescent Devices

Chenglong Li; Ruihong Duan; Baoyan Liang; Guangchao Han; Shipan Wang; Kaiqi Ye; Yu Liu; Yuanping Yi; Yue Wang

doi:10.1002/anie.201706464

Deep-Red to Near-Infrared Thermally Activated Delayed Fluorescence in Organic Solid Films and Electroluminescent Devices

Angew Chem Int Ed Engl. 2017 Sep 11;56(38):11525-11529. doi: 10.1002/anie.201706464. Epub 2017 Aug 9.

Authors

Chenglong Li¹, Ruihong Duan², Baoyan Liang¹, Guangchao Han², Shipan Wang¹, Kaiqi Ye¹, Yu Liu¹, Yuanping Yi², Yue Wang¹

Affiliations

¹ State Key Lab of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun, 130012, China.
² Key Laboratory of Organic Solids, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, China.

PMID: 28718216
DOI: 10.1002/anie.201706464

Abstract

The design and synthesis of highly efficient deep red (DR) and near-infrared (NIR) organic emitting materials with characteristic of thermally activated delayed fluorescence (TADF) still remains a great challenge. A strategy was developed to construct TADF organic solid films with strong DR or NIR emission feature. The triphenylamine (TPA) and quinoxaline-6,7-dicarbonitrile (QCN) were employed as electron donor (D) and acceptor (A), respectively, to synthesize a TADF compound, TPA-QCN. The TPA-QCN molecule with orange-red emission in solution was employed as a dopant to prepare DR and NIR luminescent solid thin films. The high doped concentration and neat films exhibited efficient DR and NIR emissions, respectively. The highly efficient DR and NIR organic light-emitting devices (OLEDs) were fabricated by regulating TPA-QCN dopant concentration in the emitting layers.

Keywords: deep-red emission; near-infrared emission; organic light-emitting devices; thermally activated delayed fluorescence.

Publication types

Research Support, Non-U.S. Gov't