Highly transparent and conductive metal oxide/metal/polymer composite electrodes for high-efficiency flexible organic light-emitting devices

Nanophotonics

article

Yun-Fei Li¹  Xiaofeng Liu³  Jing Feng²  Yu Xie⁴  Fangchao Zhao⁴  Xu-Lin Zhang²  Qibing Pei⁴  Hong-Bo Sun² 

[1] Tianjin Key Laboratory of Electronic Materials and Devices, School of Electronics and Information Engineering, Hebei University of Technology;State Key Laboratory of Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University;Irvine Materials Research Institute, University of California;Department of Materials Science and Engineering, Henry Samueli School of Engineering and Applied Science, University of California Los Angeles;State Key Lab of Precision Measurement Technology and Instruments, Department of Precision Instrument, Tsinghua University

关键词: flexible;    high efficiency;    MAP composite electrodes;    organic light-emitting devices;   

DOI  :  10.1515/nanoph-2020-0214

学科分类：社会科学、人文和艺术（综合）

来源: De Gruyter

【 摘 要 】

Ultrathin metal films emerge as an innovative category of transparent electrodes in recent decades, holding great promises enabling the next-generation flexible organic light-emitting devices (OLEDs). Although metal thin films with polymer nucleation inducers have been extensively studied in OLEDs, satisfying the requirements of both superior optoelectrical and high optical outcoupling characteristics is still challenging. Here, we demonstrate a metal oxide/ultrathin Ag/polymer (MAP) composite electrode with low sheet resistance of 15.1 Ω/sq, high transmittance of 87.4% at 550 nm, and smooth morphology with surface roughness of 0.768 nm. Besides, the composite electrodes significantly enhance the outcoupling of the light trapped in OLEDs due to the relatively high-refractive index polymer. Flexible OLEDs with the MAP anodes exhibit over 2.3 times enhancement in efficiency to that of indium tin oxide (ITO)-based OLEDs. The flexible OLEDs can survive 1000 bending cycles at a bending radius of 8 mm with negligible decrease in electroluminescent performance.

【 授权许可】

CC BY