Highly efficient solution-processed phosphorescent organic light-emitting devices with double-stacked hole injection layers

被引：16
作者：
Chen, Yuehua [1 ,2 ]
Hao, Lin [1 ,2 ]
Zhang, Xinwen [1 ,2 ]
Zhang, Xiaolin [1 ,2 ]
Liu, Mengjiao [1 ,2 ]
Zhang, Mengke [1 ,2 ]
Wang, Jiong [1 ,2 ]
Lai, Wen-Yong [1 ,2 ]
Huang, Wei [1 ,2 ,3 ,4 ]
机构：
[1] Nanjing Univ Posts & Telecommun, Key Lab Organ Elect & Informat Displays, 9 Wenyuan Rd, Nanjing 210023, Jiangsu, Peoples R China
[2] Nanjing Univ Posts & Telecommun, IAM, Jiangsu Natl Synerget Innovat Ctr Adv Mat SICAM, 9 Wenyuan Rd, Nanjing 210023, Jiangsu, Peoples R China
[3] Nanjing Tech Univ, KLOFE, 30 South Puzhu Rd, Nanjing 211816, Jiangsu, Peoples R China
[4] Nanjing Tech Univ, IAM, Jiangsu Natl Synerget Innovat Ctr Adv Mat SICAM, 30 South Puzhu Rd, Nanjing 211816, Jiangsu, Peoples R China
来源：
JOURNAL OF APPLIED PHYSICS | 2017年 / 122卷 / 06期
关键词：
TRANSPORT LAYERS; SOLAR-CELLS; ELECTROLUMINESCENT DEVICES; OPTOELECTRONIC DEVICES; DELAYED FLUORESCENCE; SMALL-MOLECULE; HOST MATERIALS; DIODES; OXIDE; PERFORMANCE;
D O I：
10.1063/1.4998449
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
In this paper, solution-processed nickel oxide (NiOx) is used as hole-injection layers (HILs) in solution-processed phosphorescent organic light-emitting diodes (PhOLEDs). Serious exciton quenching is verified at the NiOx/emitting layer (EML) interface, resulting in worse device performance. The device performance is significantly improved by inserting a layer of poly(3,4-ethylenedioxythiophene):poly(styrenesulfonic acid) (PEDOT:PSS) between the EML and NiOx. The solution-processed blue PhOLED with the double-stacked NiOx/PEDOT:PSS HILs shows a maximum current efficiency of 30.5 cd/A, which is 75% and 30% higher than those of the devices with a single NiOx HIL and a PEDOT:PSS HIL, respectively. Improvement of device efficiency can be attributed to reducing exciton quenching of the PEDOT: PSS layer as well as the electron blocking effect of the NiOx layer. Published by AIP Publishing.
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页数：7
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