Highly efficient blue phosphorescent organic light-emitting diodes with low operation voltage

被引：0

作者：

Zhu, Qi ^{[1
,2
]}

Zhou, Liang ^{[2
]}

Liu, Weiqiang ^{[2
]}

Cui, Yingjie ^{[2
]}

Wu, Ruixia ^{[2
]}

Wang, Jiahai ^{[3
]}

Duanmu, Qingduo ^{[1
]}

机构：

[1] Changchun Univ Sci & Technol, Coll Sci, Changchun 130022, Peoples R China

[2] Chinese Acad Sci, Changchun Inst Appl Chem, State Key Lab Rare Earth Resource Utilizat, Changchun 130022, Peoples R China

[3] Guangzhou Univ, Sch Chem & Chem Engn, Guangzhou Key Lab Environm Funct Mat & Technol, Guangzhou 510006, Peoples R China

来源：

OPTICS AND LASER TECHNOLOGY | 2021年 / 142卷

基金：

中国国家自然科学基金;

关键词：

Organic light-emitting diodes; Blue emission; Iridium complex; Efficiency roll-off; EXTERNAL QUANTUM EFFICIENCY; ELECTROLUMINESCENT DEVICES; TRANSPORT MATERIALS; IRIDIUM COMPLEX; HOST; GREEN; DERIVATIVES;

D O I：

10.1016/j.optlastec.2021.107229

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

In this work, we report an efficient blue organic electroluminescent device based on phosphorescent emitter iridium(III) bis(4 ',6 '-difluorophenylpyridinato)tetrakis(1-pyrazolyl)borate (FIr6), which displayed excellent thermal stability. To balance carriers' distribution and reduce operation voltage, double light-emitting layers device structure was designed by selecting 4,4 ',4 '-tris(N-carbazolyl)triphenylamine (TcTa) and 2,6-bis(3-(9Hcarbazol-9-yl)phenyl)phyridine (26DCzPPy) as host materials because of their stepwise energy levels. By optimizing the doping concentration of FIr6 to be 26 wt%, well balanced carriers' distribution on emitter molecules and broadening recombination zone were realized. Finally, high performance blue device with slow efficiency roll-off and high current efficiency up to 56.83 cd/A (obtained at 700 cd/m2) was realized. At the certain brightness of 1000 (3.9 V) and 5000 cd/m2 (4.8 V), the same device retained efficiencies of 56.33 and 51.45 cd/A, respectively.

引用

页数：5

共 25 条

[1] Bright red phosphorescent organic electroluminescent devices with slow efficiency roll-off by utilizing iridium(III) complex as hole-type sensitizer [J].

Cui, Rongzhen ;

Zhou, Liang ;

Jiang, Yunlong ;

Wang, Yujia ;

Li, Yanan ;

Zhao, Xuesen ;

Lu, Liping .

DYES AND PIGMENTS, 2020, 178

[2] Green phosphorescent organic electroluminescent devices with 27.9% external quantum efficiency by employing a terbium complex as a co-dopant [J].

Cui, Rongzhen ;

Liu, Weiqiang ;

Zhou, Liang ;

Zhao, Xuesen ;

Jiang, Yunlong ;

Cui, Yingjie ;

Zhu, Qi ;

Zheng, Youxuan ;

Zhang, Hongjie .

JOURNAL OF MATERIALS CHEMISTRY C, 2019, 7 (26) :7953-7958

[3] Highly efficient green and white fluorescent organic electroluminescent devices with co-doped electron transport material as both supplementary host and blue emitter [J].

Cui, Rongzhen ;

Zhou, Liang ;

Li, Yanan ;

Jiang, Yunlong ;

Zhao, Xuesen ;

Lu, Liping .

JOURNAL OF LUMINESCENCE, 2018, 204 :668-675

[4] Highly efficient green phosphorescent organic electroluminescent devices with a terbium complex as the sensitizer [J].

Cui, Rongzhen ;

Liu, Weiqiang ;

Zhou, Liang ;

Li, Yanan ;

Jiang, Yunlong ;

Zhao, Xuesen ;

Cui, Yingjie ;

Zhu, Qi ;

Zheng, Youxuan ;

Deng, Ruiping ;

Zhang, Hongjie .

DYES AND PIGMENTS, 2017, 136 :361-367

[5] Efficient organic electrophosphorescent white-light-emitting device with a triple doped emissive layer [J].

D'Andrade, BW ;

Holmes, RJ ;

Forrest, SR .

ADVANCED MATERIALS, 2004, 16 (07) :624-+

[6] Effect of electron injection and transport materials on efficiency of deep-blue phosphorescent organic light-emitting devices [J].

Eom, Sang-Hyun ;

Zheng, Ying ;

Wrzesniewski, Edward ;

Lee, Jaewon ;

Chopra, Neetu ;

So, Franky ;

Xue, Jiangeng .

ORGANIC ELECTRONICS, 2009, 10 (04) :686-691

[7] Low voltage and very high efficiency deep-blue phosphorescent organic light-emitting devices [J].

Eom, Sang-Hyun ;

Zheng, Ying ;

Chopra, Neetu ;

Lee, Jaewon ;

So, Franky ;

Xue, Jiangeng .

APPLIED PHYSICS LETTERS, 2008, 93 (13)

[8] Highly Efficient Simple-Structure Blue and All-Phosphor Warm-White Phosphorescent Organic Light-Emitting Diodes Enabled by Wide-Bandgap Tetraarylsilane-Based Functional Materials [J].

Gong, Shaolong ;

Sun, Ning ;

Luo, Jiajia ;

Zhong, Cheng ;

Ma, Dongge ;

Qin, Jingui ;

Yang, Chuluo .

ADVANCED FUNCTIONAL MATERIALS, 2014, 24 (36) :5710-5718

[9] Efficient single light-emitting layer pure blue phosphorescent organic light-emitting devices with wide gap host and matched interlayer [J].

Jiang, Yunlong ;

Zhou, Liang ;

Cui, Rongzhen ;

Li, Yanan ;

Zhao, Xuesen ;

Zhang, Hongjie .

JOURNAL OF LUMINESCENCE, 2015, 168 :38-42

[10] Efficient white organic light-emitting devices based on phosphorescent iridium complexes [J].

Lai, S. L. ;

Tao, S. L. ;

Chan, M. Y. ;

Ng, T. W. ;

Lo, M. F. ;

Lee, C. S. ;

Zhang, X. H. ;

Lee, S. T. .

ORGANIC ELECTRONICS, 2010, 11 (09) :1511-1515

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