Improvement of Efficiency Roll-Off of Yellow Phosphorescent Organic Light-Emitting Devices by N-Doping

被引：3

作者：

Lin Wenyan ^{[1
]}

Yu Ye ^{[1
]}

Peng Xuekang ^{[1
]}

Jin Yu ^{[1
]}

Wu Zhijun ^{[1
]}

Lin Wei ^{[1
]}

机构：

[1] Huaqiao Univ, Coll Informat Sci & Engn, Xiamen 361021, Fujian, Peoples R China

来源：

ACTA OPTICA SINICA | 2019年 / 39卷 / 03期

关键词：

optical devices; efficiency roll-off; N-doping; organic light-emitting device; light-emitting diode;

D O I：

10.3788/AOS201939.0323001

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Yellow phosphorescent organic light-emitting device is prepared, and the structure of the device is ITO/HAT-CN/TAPC/TCTA/POAPF: PO-01/13phen/LiF/Al. The efficiency roll-off of the device fits the tripletpolaron quenching model well. Then, electron-only and hole-only devices arc designed. Experimental results show that the holes arc majority carriers in light-emitting layer and PO-01 traps holes. The efficiency of the device rolls off drastically due to excitons quenching caused by PO-01 trapping excess holes at high current density. The method of N-doping is used to increase the electron injection, which reduces excess holes in the light-emitting region, improves the carriers balance of the device, and alleviates the excitons quenching caused by excess holes, thereby improving the efficiency roll-off.

引用

页数：6

共 18 条

[1] Transient analysis of organic electrophosphorescence. II. Transient analysis of triplet-triplet annihilation
Baldo, MA
Adachi, C
Forrest, SR
[J]. PHYSICAL REVIEW B, 2000, 62 (16) : 10967 - 10977
[2] Chen W B, 2017, LASER OPTOELECTRONIC, V54
[3] A phenothiazine/dimesitylborane hybrid material as a bipolar transport host of red phosphor
Cheng, Yu-Jen
Yu, Siao-Yin
Lin, Song-Cheng
Lin, Jiann T.
Chen, Li-Yin
Hsiu, Dai-Sin
Wen, Yuh Sheng
Lee, Mandy M.
Sun, Shih-Sheng
[J]. JOURNAL OF MATERIALS CHEMISTRY C, 2016, 4 (40) : 9499 - 9508
[4] Furukawa T, 2015, SCI REPORTS, V5, P4100
[5] Kimura H, 2015, Patent No. [US9041202, 9041202]
[6] Improved Hole-Transporting Property via HAT-CN for Perovskite Solar Cells without Lithium Salts
Ma, Yingzhuang
Chung, Yao-Hsien
Zheng, Lingling
Zhang, Danfei
Yu, Xiao
Xiao, Lixin
Chen, Zhijian
Wang, Shufeng
Qu, Bo
Gong, Qihuang
Zou, Dechun
[J]. ACS APPLIED MATERIALS & INTERFACES, 2015, 7 (12) : 6406 - 6411
[7] Triplet-exciton quenching in organic phosphorescent light-emitting diodes with Ir-based emitters
Reineke, Sebastian
Walzer, Karsten
Leo, Karl
[J]. PHYSICAL REVIEW B, 2007, 75 (12):
[8] Recent Progress of Host Materials for Highly Efficient Blue Phosphorescent OLEDs
Wang Fangfang
Tao Youtian
Huang Wei
[J]. ACTA CHIMICA SINICA, 2015, 73 (01) : 9 - 22
[9] Simple-Structured Phosphorescent Warm White Organic Light-Emitting Diodes with High Power Efficiency and Low Efficiency Roll-off
Wang, Jiaxiu
Chen, Jiangshan
Qjao, Xianfeng
Alshehri, Saad M.
Aharnad, Tansir
Ma, Dongge
[J]. ACS APPLIED MATERIALS & INTERFACES, 2016, 8 (16) : 10093 - 10097
[10] Comparison of electron transporting layer in white OLED with a double emissive layer structure
Wang, Xu
Yu, Junsheng
Zhao, Juan
Lei, Xia
[J]. DISPLAYS, 2012, 33 (4-5) : 191 - 194

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