Ideal Molecular Design of Blue Thermally Activated Delayed Fluorescent Emitter for High Efficiency, Small Singlet-Triplet Energy Splitting, Low Efficiency Roll-Off, and Long Lifetime

被引：125

作者：

Lee, Dong Ryun ^{[1
]}

Choi, Jeong Min ^{[1
]}

Lee, Chil Won ^{[2
]}

Lee, Jun Yeob ^{[1
]}

机构：

[1] Sungkyunkwan Univ, Sch Chem Engn, 2066 Seobu Ro, Suwon 440746, South Korea

[2] Dankook Univ, Dept Polymer Sci & Engn, 126 Jukjeon Dong, Yongin 448701, Gyeonggi, South Korea

来源：

ACS APPLIED MATERIALS & INTERFACES | 2016年 / 8卷 / 35期

基金：

新加坡国家研究基金会;

关键词：

delayed fluorescence; singlet energy; ortho-; linkage; charge transfer; triplet energy; EXTERNAL QUANTUM EFFICIENCY; LIGHT; DIODES; DEVICES; DERIVATIVES; 30-PERCENT; GREEN; OLEDS;

D O I：

10.1021/acsami.6b05877

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Highly efficient thermally activated delayed fluorescent (TADF) emitters, S-(2-(4,6-diphenyl-1,3,5-triazin-2-yl)phenyl)-5H-benzofuro[3,2-c]carbazole (oBFCzTrz), 5-(3-(4,6-diphenyl-1,3,5-triazin-2-yl)phenyl)-5H-benzofuro[3,2-c]-carbazole (mBFCzTrz), and 5-(4-(4,6-diphenyl-1,3,5-triazin-2-yl)phenyl)-5H-benzofuro[3,2-c]carbazole (pBFCzTrz), were synthesized to study the effects of ortho-, meta-, and para- linkages between donor and acceptor moieties. oBFCzTrz having ortho- linked donor and acceptor moieties showed smaller singlet-triplet energy gap, shorter excited state lifetime, and higher photoluminescence quantum yield than mBFCzTrz and pBFCzTrz which are interconnected by meta- and para- positions. The TADF device using oBFCzTrz as a blue emitter exhibited high external quantum efficiency over 20%, little efficiency roll-off, and long device lifetime.

引用

页码：23190 / 23196

页数：7

共 31 条

[1] The Design of Dual Emitting Cores for Green Thermally Activated Delayed Fluorescent Materials [J].

Cho, Yong Joo ;

Jeon, Sang Kyu ;

Chin, Byung Doo ;

Yu, Eunsun ;

Lee, Jun Yeob .

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION, 2015, 54 (17) :5201-5204

[2]

Hirata S, 2015, NAT MATER, V14, P330, DOI [10.1038/nmat4154, 10.1038/NMAT4154]

[3] Purely organic electroluminescent material realizing 100% conversion from electricity to light [J].

Kaji, Hironori ;

Suzuki, Hajime ;

Fukushima, Tatsuya ;

Shizu, Katsuyuki ;

Suzuki, Katsuaki ;

Kubo, Shosei ;

Komino, Takeshi ;

Oiwa, Hajime ;

Suzuki, Furitsu ;

Wakamiya, Atsushi ;

Murata, Yasujiro ;

Adachi, Chihaya .

NATURE COMMUNICATIONS, 2015, 6

[4] Correlation of Molecular Structure with Photophysical Properties and Device Performances of Thermally Activated Delayed Fluorescent Emitters [J].

Kim, Mounggon ;

Jeon, Sang Kyu ;

Hwang, Seok-Ho ;

Lee, Sang-Shin ;

Yu, Eunsun ;

Lee, Jun Yeob .

JOURNAL OF PHYSICAL CHEMISTRY C, 2016, 120 (05) :2485-2493

[5] Stable Blue Thermally Activated Delayed Fluorescent Organic Light-Emitting Diodes with Three Times Longer Lifetime than Phosphorescent Organic Light-Emitting Diodes [J].

Kim, Mounggon ;

Jeon, Sang Kyu ;

Hwang, Seok-Ho ;

Lee, Jun Yeob .

ADVANCED MATERIALS, 2015, 27 (15) :2515-2520

[6] Engineering the Substitution Position of Diphenylphosphine Oxide at Carbazole for Thermal Stability and High External Quantum Efficiency Above 30% in Blue Phosphorescent Organic Light-Emitting Diodes [J].

Kim, Mounggon ;

Lee, Jun Yeob .

ADVANCED FUNCTIONAL MATERIALS, 2014, 24 (26) :4164-4169

[7] Above 30% External Quantum Efficiency in Blue Phosphorescent Organic Light-Emitting Diodes Using Pyrido[2,3-b]indole Derivatives as Host Materials [J].

Lee, Chil Won ;

Lee, Jun Yeob .

ADVANCED MATERIALS, 2013, 25 (38) :5450-5454

[8] Design Strategy for 25% External Quantum Efficiency in Green and Blue Thermally Activated Delayed Fluorescent Devices [J].

Lee, Dong Ryun ;

Kim, Mounggon ;

Jeon, Sang Kyu ;

Hwang, Seok-Ho ;

Lee, Chil Won ;

Lee, Jun Yeob .

ADVANCED MATERIALS, 2015, 27 (39) :5861-5867

[9] Benzofurocarbazole and benzothienocarbazole as donors for improved quantum efficiency in blue thermally activated delayed fluorescent devices [J].

Lee, Dong Ryun ;

Hwang, Seok-Ho ;

Jeon, Sang Kyu ;

Lee, Chil Won ;

Lee, Jun Yeob .

CHEMICAL COMMUNICATIONS, 2015, 51 (38) :8105-8107

[10]

Lee J, 2016, NAT MATER, V15, P92, DOI [10.1038/NMAT4446, 10.1038/nmat4446]

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