Horizontally Orientated Sticklike Emitters: Enhancement of Intrinsic Out-Coupling Factor and Electroluminescence Performance

被引：158

作者：

Liu, Ming ^{[1
,2
]}

Komatsu, Ryutaro ^{[2
]}

Cai, Xinyi ^{[1
]}

Hotta, Katsuyuki ^{[2
]}

Sato, Shugo ^{[2
]}

Liu, Kunkun ^{[1
]}

Chen, Dongcheng ^{[1
]}

Kato, Yuki ^{[2
]}

Sasabe, Hisahiro ^{[2
,3
]}

Ohisa, Satoru ^{[2
,3
]}

Suzuri, Yoshiyuki ^{[4
]}

Yokoyama, Daisuke ^{[2
,3
]}

Su, Shi-Jian ^{[1
]}

Kido, Junji ^{[2
,3
]}

机构：

[1] South China Univ Technol, Inst Polymer Optoelect Mat & Devices, State Key Lab Luminescent Mat & Devices, Guangzhou 510640, Guangdong, Peoples R China

[2] Yamagata Univ, Grad Sch Organ Mat Sci, Dept Organ Mat Sci, Yonezawa, Yamagata 9928510, Japan

[3] Yamagata Univ, Frontier Ctr Organ Mat FROM, Res Ctr Organ Elect ROEL, Yonezawa, Yamagata 9928510, Japan

[4] Yamagata Univ, Innovat Ctr Organ Elect INOEL, Yonezawa, Yamagata 9920119, Japan

来源：

CHEMISTRY OF MATERIALS | 2017年 / 29卷 / 20期

基金：

国家重点研发计划; 日本科学技术振兴机构; 中国国家自然科学基金;

关键词：

LIGHT-EMITTING-DIODES; ACTIVATED DELAYED FLUORESCENCE; EXTERNAL QUANTUM EFFICIENCY; PHOSPHORESCENT EMITTERS; MOLECULAR DESIGN; BLUE; DEVICES; EMISSION;

D O I：

10.1021/acs.chemmater.7b02403

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Highly efficient organic light-emitting diodes are in urgent demand in applications of new generation full-color displays and solid-state lighting sources. The limitation of device performance is greatly affected by extrinsic and intrinsic elements of the light out-coupling process. By elaborately designing emitters as sticklike molecules, horizontal orientation ratios in the range of 86-93% were realized to intrinsically increase the out-coupling factor of electroluminescence devices. These elongated compounds are inclined to lie parallel to substrate in vacuum-deposited thin solid films and regularize their transition dipole moments in a major degree. As consequences of such desirable molecule arrangement, remarkable external quantum efficiencies near 21% for pure blue devices, close to 30% for sky-blue devices, and over 35% for greenish blue devices were respectively achieved. A compatible strategy on devising high-performance emitters for organic electroluminescence is advocated herein.

引用

页码：8630 / 8636

页数：7

共 46 条

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