Over 60 cd/A Efficient Vacuum-free-processed Green Quantum Dot Light-Emitting Diodes for Next Generation Displays

Peng，Huiren; Xu，Dingxin; Yang，Yuchao; Chen，Bingwei; Jiang，Yibin; Sun，Xiao Wei; Chen，Shuming

10.1002/SDTP.11994

2017

0097-966X

2168-0159

Digest of Technical Papers - SID International Symposium

48

1

1708-1710

Efficient vacuum-free-processed quantum dot light-emitting diodes (QLEDs) are reported in this paper. By printing liquid metal cathodes, vacuum-free-processed QLEDs exhibit a high current efficiency of ~60 cd/A and a maximum external quantum efficiency (EQE) of 14.8% for green devices, which are about 1.4-fold higher than 42.5 cd/A (EQE 10.6%) for the devices with thermally evaporated Al cathodes. The improved performance is attributed to the reduction of electron injection caused by the GaOx thin film, which serves as an electron-blocking layer, and thus improves the charge balance. The EGaIn based solvent-free liquid metals are promising printable electrode materials for roll-to-roll manufacturing efficient QLED displays.

First

English

2-s2.0-85139510297

Scopus

Department of Electrical and Electronic Engineering,Southern University of Science and Technology,Shenzhen,518055,China

Peng，Huiren,Xu，Dingxin,Yang，Yuchao,et al. Over 60 cd/A Efficient Vacuum-free-processed Green Quantum Dot Light-Emitting Diodes for Next Generation Displays[C],2017:1708-1710.