Highly efficient inkjet printed flexible organic light-emitting diodes with hybrid hole injection layer

被引：42

作者：

Feng, Chen ^{[1
]}

Zheng, Xiaojing ^{[1
]}

Xu, Rui ^{[2
]}

Zhou, Yuangui ^{[2
]}

Hu, Hailong ^{[1
]}

Guo, Tailiang ^{[1
]}

Ding, Junqiao ^{[3
]}

Ying, Lei ^{[4
]}

Li, Fushan ^{[1
]}

机构：

[1] Fuzhou Univ, Inst Optoelect Technol, Fuzhou 350116, Peoples R China

[2] Fujian Yuanding Novel Mat Sci & Tech Co Ltd, Jiangle 353300, Peoples R China

[3] Chinese Acad Sci, Changchun Inst Appl Chem, Changchun 130022, Peoples R China

[4] South China Univ Technol, State Key Lab Luminescent Mat & Devices, Guangzhou 510640, Peoples R China

来源：

ORGANIC ELECTRONICS | 2020年 / 85卷

基金：

中国国家自然科学基金;

关键词：

Inkjet-printing; Flexible; Organic light-emitting diode; Charge regulation; EXTERNAL QUANTUM EFFICIENCY; IRIDIUM DENDRIMERS; TRANSPARENT; DEVICES; OLEDS;

D O I：

10.1016/j.orgel.2020.105822

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Highly efficient flexible organic light-emitting diodes (OLEDs) fabricated by utilizing inkjet printing technique are demonstrated in this work. A strategy of hybrid hole injection layer is employed to improve the device efficiency, where the polyethylene glycol (PEG) is used to modify the energy level and conductivity of the conventional hole injection layer poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS), which regulates the amount of holes entering the organic light-emitting layer, realizes the injection balance of carriers, and nearly doubles the green device efficiency with the record high maximum external quantum efficiency (EQE) of 9.45% and the current efficiency of 28 cd/A. Moreover, the introduction of PEG improves the mechanical properties of PEDOT: PSS and improves the bending resistance of the device. A highly efficient flexible white OLED device is realized by using inkjet printing based on the PEG-modified PEDOT:PSS hole injection layer, achieving the maximum EQE of 4.8%. In addition, a 1-inch white OLED array device is realized on the flexible substrate, which further confirm the feasibility of large-scale production for inkjet printed flexible devices.

引用

页数：6

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