Recent progress in thermally activated delayed fluorescence emitters for nondoped organic light-emitting diodes.

Autor:	Shi YZ; Institute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Soochow University 199 Ren'ai Road Suzhou Jiangsu 215123 PR China xiaohong_zhang@suda.edu.cn wkai@suda.edu.cn., Wu H; Institute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Soochow University 199 Ren'ai Road Suzhou Jiangsu 215123 PR China xiaohong_zhang@suda.edu.cn wkai@suda.edu.cn., Wang K; Institute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Soochow University 199 Ren'ai Road Suzhou Jiangsu 215123 PR China xiaohong_zhang@suda.edu.cn wkai@suda.edu.cn., Yu J; Institute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Soochow University 199 Ren'ai Road Suzhou Jiangsu 215123 PR China xiaohong_zhang@suda.edu.cn wkai@suda.edu.cn., Ou XM; Institute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Soochow University 199 Ren'ai Road Suzhou Jiangsu 215123 PR China xiaohong_zhang@suda.edu.cn wkai@suda.edu.cn., Zhang XH; Institute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Soochow University 199 Ren'ai Road Suzhou Jiangsu 215123 PR China xiaohong_zhang@suda.edu.cn wkai@suda.edu.cn.
Jazyk:	angličtina
Zdroj:	Chemical science [Chem Sci] 2022 Feb 22; Vol. 13 (13), pp. 3625-3651. Date of Electronic Publication: 2022 Feb 22 (Print Publication: 2022).
DOI:	10.1039/d1sc07180g
Abstrakt:	Nondoped organic light-emitting diodes (OLEDs) have drawn immense attention due to their merits of process simplicity, reduced fabrication cost, etc. To realize high-performance nondoped OLEDs, all electrogenerated excitons should be fully utilized. The thermally activated delayed fluorescence (TADF) mechanism can theoretically realize 100% internal quantum efficiency (IQE) through an effective upconversion process from nonradiative triplet excitons to radiative singlet ones. Nevertheless, exciton quenching, especially related to triplet excitons, is generally very serious in TADF-based nondoped OLEDs, significantly hindering the pace of development. Enormous efforts have been devoted to alleviating the annoying exciton quenching process, and a number of TADF materials for highly efficient nondoped devices have been reported. In this review, we mainly discuss the mechanism, exciton leaking channels, and reported molecular design strategies of TADF emitters for nondoped devices. We further classify their molecular structures depending on the functional A groups and offer an outlook on their future prospects. It is anticipated that this review can entice researchers to recognize the importance of TADF-based nondoped OLEDs and provide a possible guide for their future development. Competing Interests: The authors declare no conflicts of interest. (This journal is © The Royal Society of Chemistry.)
Databáze:	MEDLINE
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