Exciplex host coupled with a micro-cavity enabling high efficiency OLEDs with narrow emission profile

被引：9

作者：

Wen, Ya ^{[1
]}

Wang, Ya-Kun ^{[1
]}

Zhou, Jun-Gui ^{[1
]}

Li, Jiao-Yang ^{[1
]}

He, Wei ^{[1
]}

Zhang, Yi-Jie ^{[1
]}

Zhu, Xiao-Zhao ^{[1
,2
]}

Liao, Liang-Sheng ^{[1
,2
,3
]}

Fung, Man-Keung ^{[1
,2
,3
]}

机构：

[1] Soochow Univ, Inst Funct Nano & Soft Mat FUNSOM, Jiangsu Key Lab Carbon Based Funct Mat & Devices, 199 Renai Rd, Suzhou 215123, Jiangsu, Peoples R China

[2] Jiangsu Ind Technol Res Inst JITRI, Inst Organ Optoelect IOO, 1198 Fenhu Dadao, Suzhou, Jiangsu, Peoples R China

[3] Macau Univ Sci & Technol, Zhuhai MUST Sci & Technol Res Inst, MUST SUDA Joint Res Ctr Adv Funct Mat, Macao Inst Mat Sci & Engn MIMSE, Taipa 999078, Macau, Peoples R China

来源：

JOURNAL OF MATERIALS CHEMISTRY C | 2022年 / 10卷 / 14期

基金：

中国国家自然科学基金; 中国博士后科学基金;

关键词：

LIGHT-EMITTING-DIODES; ACTIVATED DELAYED FLUORESCENCE; EXTERNAL QUANTUM EFFICIENCY; BLUE PHOSPHORESCENT OLEDS; HIGH-PERFORMANCE; ENERGY-TRANSFER; FORMING COHOST; COMPLEXES; EMITTERS; DESIGN;

D O I：

10.1039/d1tc05978e

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Inter-molecular charge transfer-based donor-acceptor combination - with type-II energy transfer and known as an exciplex - has been extensively studied as a host for organic light-emitting diodes (OLEDs) due to the benefit of high efficiency. However, the broad spectral emission and full width at half maximum (FWHM) of the resulting electroluminescence lead to poor color purity, limiting their potential use in flat panel displays. We here propose a combination strategy that unites an exciplex host and a micro-cavity to resolve the color purity issue. The proposed strategy enables OLEDs to exhibit 2-fold narrower FWHM (26 nm vs. 71 nm) and a record current efficiency (CE) of 180.2 cd A(-1) (CE remains 167 cd A(-1) at 1000 cd m(-2)) without any external light-extraction techniques. This work offers a new strategy to achieve high efficiency and high color-purity OLEDs simultaneously.

引用

页码：5666 / 5671

页数：6

共 21 条

[21] Solution-processed white OLEDs with power efficiency over 90 lm W-1 by triplet exciton management with a high triplet energy level interfacial exciplex host and a high reverse intersystem crossing rate blue TADF emitter (vol 9, pg 1299, 2022)
Chen, Liang
Chang, Yufei
Shi, Song
Wang, Shumeng
Wang, Lixiang
MATERIALS HORIZONS, 2024, 11 (07) : 1817 - 1817

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