Recent Advances in Metal-TADF Emitters and Their Application in Organic Light-Emitting Diodes

Wai-Pong To; Gang Cheng; Gang Cheng; Glenna So Ming Tong; Dongling Zhou; Chi-Ming Che; Chi-Ming Che

doi:10.3389/fchem.2020.00653

Frontiers in Chemistry (Jul 2020)

Recent Advances in Metal-TADF Emitters and Their Application in Organic Light-Emitting Diodes

Wai-Pong To,
Gang Cheng,
Gang Cheng,
Glenna So Ming Tong,
Dongling Zhou,
Chi-Ming Che,
Chi-Ming Che

Affiliations

Wai-Pong To: State Key Laboratory of Synthetic Chemistry, HKU-CAS Joint Laboratory on New Materials, Department of Chemistry, The University of Hong Kong, Hong Kong, China
Gang Cheng: State Key Laboratory of Synthetic Chemistry, HKU-CAS Joint Laboratory on New Materials, Department of Chemistry, The University of Hong Kong, Hong Kong, China
Gang Cheng: HKU Shenzhen Institute of Research and Innovation, Shenzhen, China
Glenna So Ming Tong: State Key Laboratory of Synthetic Chemistry, HKU-CAS Joint Laboratory on New Materials, Department of Chemistry, The University of Hong Kong, Hong Kong, China
Dongling Zhou: State Key Laboratory of Synthetic Chemistry, HKU-CAS Joint Laboratory on New Materials, Department of Chemistry, The University of Hong Kong, Hong Kong, China
Chi-Ming Che: State Key Laboratory of Synthetic Chemistry, HKU-CAS Joint Laboratory on New Materials, Department of Chemistry, The University of Hong Kong, Hong Kong, China
Chi-Ming Che: HKU Shenzhen Institute of Research and Innovation, Shenzhen, China

DOI: https://doi.org/10.3389/fchem.2020.00653
Journal volume & issue: Vol. 8

Abstract

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In this contribution, recent advances in new classes of efficient metal-TADF complexes, especially those of Au(I), Au(III), and W(VI), and their application in OLEDs are reviewed. The high performance (EQE = 25%) and long device operational lifetime (LT95 = 5,280 h) achieved in an OLED with tetradentate Au(III) TADF emitter reflect the competitiveness of this class of emitters for use in OLEDs with practical interest. The high EQE of 15.6% achieved in solution-processed OLED with W(VI) TADF emitter represents an alternative direction toward low-cost light-emitting materials. Finally, the design strategy of metal-TADF emitters and their next-stage development are discussed.

Published in Frontiers in Chemistry

ISSN: 2296-2646 (Online)
Publisher: Frontiers Media S.A.
Country of publisher: Switzerland
LCC subjects: Science: Chemistry
Website: http://journal.frontiersin.org/journal/chemistry

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