Highly Efficient Green and Red Narrowband Emissive Organic Light-Emitting Diodes Employing Multi-Resonant Thermally Activated Delayed Fluorescence Emitters

被引：50

作者：

Wu, Sen ^{[1
]}

Gupta, Abhishek Kumar ^{[1
,2
]}

Yoshida, Kou ^{[2
]}

Gong, Junyi ^{[2
]}

Hall, David ^{[1
]}

Cordes, David B. ^{[1
]}

Slawin, Alexandra M. Z. ^{[1
]}

Samuel, Ifor D. W. ^{[2
]}

Zysman-Colman, Eli ^{[1
]}

机构：

[1] Univ St Andrews, EaStCHEM Sch Chem, Organ Semicond Ctr, St Andrews KY16 9ST, Fife, Scotland

[2] Univ St Andrews, SUPA Sch Phys & Astron, Organ Semicond Ctr, St Andrews KY16 9SS, Fife, Scotland

来源：

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION | 2022年 / 61卷 / 12期

基金：

英国工程与自然科学研究理事会;

关键词：

Horizontal Orientation; Hyperfluorescence; Multi-Resonance; Organic Light-Emitting Diodes; Thermally Activated Delayed Fluorescence; TADF;

D O I：

10.1002/anie.202213697

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Herein, we demonstrate how judicious selection of the donor decorating a central multi-resonant thermally activated delayed fluorescence (MR-TADF) core based on DiKTa can lead to very high-performance OLEDs. By decorating the DiKTa core with triphenylamine (TPA) and diphenylamine (DPA), 3TPA-DiKTa and 3DPA-DiKTa exhibit bright, narrowband green and red emission in doped films, respectively. The OLEDs based on these emitters showed record-high performance for this family of emitters with maximum external quantum efficiencies (EQE(max)) of 30.8% for 3TPA-DiKTa at lambda (EL) of 551nm and 16.7% for 3DPA-DiKTa at lambda (EL)=613nm. The efficiency roll-off in the OLEDs was improved significantly by using 4CzIPN as an assistant dopant in hyperfluorescence (HF) devices. The outstanding device performance has been attributed to preferential horizontal orientation of the transition dipole moments of 3TPA-DiKTa and 3DPA-DiKTa.

引用

页数：9

共 50 条

[21] Molecular Design Strategy of Organic Thermally Activated Delayed Fluorescence Emitters [J].

Im, Yirang ;

Kim, Mounggon ;

Cho, Yong Joo ;

Seo, Jeong-A ;

Yook, Kyoung Soo ;

Lee, Jun Yeob .

CHEMISTRY OF MATERIALS, 2017, 29 (05) :1946-1963

[22] Organic light emitting diodes with horizontally oriented thermally activated delayed fluorescence emitters [J].

Kim, D. H. ;

Inada, K. ;

Zhao, L. ;

Komino, T. ;

Matsumoto, N. ;

Ribierre, J. C. ;

Adachi, C. .

JOURNAL OF MATERIALS CHEMISTRY C, 2017, 5 (05) :1216-1223

[23] Narrowband deep-blue organic light-emitting diode featuring an organoboron-based emitter [J].

Kondo, Yasuhiro ;

Yoshiura, Kazuki ;

Kitera, Sayuri ;

Nishi, Hiroki ;

Oda, Susumu ;

Gotoh, Hajime ;

Sasada, Yasuyuki ;

Yanai, Motoki ;

Hatakeyama, Takuji .

NATURE PHOTONICS, 2019, 13 (10) :678-+

[24] Molecular design of thermally activated delayed fluorescent emitters for narrowband orange-red OLEDs boosted by a cyano-functionalization strategy [J].

Liu, Yang ;

Xiao, Xin ;

Ran, You ;

Bin, Zhengyang ;

You, Jingsong .

CHEMICAL SCIENCE, 2021, 12 (27) :9408-9412

[25] All-organic thermally activated delayed fluorescence materials for organic light-emitting diodes [J].

Liu, Yuchao ;

Li, Chensen ;

Ren, Zhongjie ;

Yan, Shouke ;

Bryce, Martin R. .

NATURE REVIEWS MATERIALS, 2018, 3 (04)

[26] Analysis of exciton annihilation in high-efficiency sky-blue organic light-emitting diodes with thermally activated delayed fluorescence [J].

Masui, Kensuke ;

Nakanotani, Hajime ;

Adachi, Chihaya .

ORGANIC ELECTRONICS, 2013, 14 (11) :2721-2726

[27] High-Performance Dibenzoheteraborin-Based Thermally Activated Delayed Fluorescence Emitters: Molecular Architectonics for Concurrently Achieving Narrowband Emission and Efficient Triplet-Singlet Spin Conversion [J].

Park, In Seob ;

Matsuo, Kyohei ;

Aizawa, Naoya ;

Yasuda, Takuma .

ADVANCED FUNCTIONAL MATERIALS, 2018, 28 (34)

[28] Highly emissive excitons with reduced exchange energy in thermally activated delayed fluorescent molecules [J].

Pershin, Anton ;

Hall, David ;

Lemaur, Vincent ;

Sancho-Garcia, Juan-Carlos ;

Muccioli, Luca ;

Zysman-Colman, Eli ;

Beljonne, David ;

Olivier, Yoann .

NATURE COMMUNICATIONS, 2019, 10 (1)

[29] Peripheral Decoration of Multi-Resonance Molecules as a Versatile Approach for Simultaneous Long-Wavelength and Narrowband Emission [J].

Qi, Yanyu ;

Ning, Weimin ;

Zou, Yang ;

Cao, Xiaosong ;

Gong, Shaolong ;

Yang, Chuluo .

ADVANCED FUNCTIONAL MATERIALS, 2021, 31 (29)

[30] Effective method for the computation of optical spectra of large molecules at finite temperature including the Duschinsky and Herzberg-Teller effect:: The Qx band of porphyrin as a case study [J].

Santoro, Fabrizio ;

Lami, Alessandro ;

Improta, Roberto ;

Bloino, Julien ;

Barone, Vincenzo .

JOURNAL OF CHEMICAL PHYSICS, 2008, 128 (22)

← 1 2 3 4 5 →