Aromatic-Imide-Based Thermally Activated Delayed Fluorescence Materials for Highly Efficient Organic Light-Emitting Diodes

Meng Li; Yanwei Liu; Ruihong Duan; Xiaofang Wei; Yuanping Yi; Ying Wang; Chuan-Feng Chen

doi:10.1002/anie.201704435

Aromatic-Imide-Based Thermally Activated Delayed Fluorescence Materials for Highly Efficient Organic Light-Emitting Diodes

Angew Chem Int Ed Engl. 2017 Jul 17;56(30):8818-8822. doi: 10.1002/anie.201704435. Epub 2017 Jun 23.

Authors

Meng Li^{1

2}, Yanwei Liu³, Ruihong Duan⁴, Xiaofang Wei³, Yuanping Yi⁴, Ying Wang³, Chuan-Feng Chen^{1

2}

Affiliations

¹ CAS Key Laboratory of Molecular Recognition and Function, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, China.
² University of Chinese Academy of Sciences, Beijing, 100049, China.
³ Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, 100190, China.
⁴ CAS Key Laboratory of Organic Solids, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, China.

PMID: 28557359
DOI: 10.1002/anie.201704435

Abstract

Aromatic-imide-based thermally activated delayed fluorescence (TADF) materials with a twisted donor-acceptor-donor skeleton were efficiently synthesized and exhibited excellent thermal stability and high photoluminescence quantum yields. The small ΔE_ST value (<0.1 eV) along with the clear temperature-dependent delayed component of their transient photoluminescence (PL) spectra demonstrated their excellent TADF properties. Moreover, the performance of organic light-emitting diodes in which TADF materials AI-Cz and AI-TBCz were used as dopants were outstanding, with external quantum efficiencies up to 23.2 and 21.1 %, respectively.

Keywords: aromatic imides; electroluminescence; fluorescence; materials science; organic light-emitting diodes.

Publication types

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