All Solution-Processed White Quantum-Dot Light-Emitting Diodes with Three-Unit Tandem Structure

Zhang，Heng; Wang，Siting; Sun，Xiaowei; Chen，Shuming

10.1002/SDTP.11989

2017

0097-966X

2168-0159

Digest of Technical Papers - SID International Symposium

48

1

1691-1694

In this work, we demonstrate all-solution processed three-unit (red/green/blue) white tandem QLEDs for the first time. The white tandem devices are achieved by serially connecting the red bottom sub-QLED, the green middle sub-QLED and the blue top sub-QLED using the inter-connecting layer (ICL) based on ZnMgO/PEDOT:PSS heterojunction. With the proposed ICL, the two-unit tandem QLEDs exhibit a high current efficiency of 22.22 cd/A, while the three-unit white QLEDs exhibit a peak current efficiency of 4.75 cd/A at a high luminance of 4206 cd/m. Displays based on the developed white QLEDs exhibit a wide color gamut of 114% NTSC. This work confirms the effectiveness of the proposed ZnMgO/PEDOT:PSS ICL and the feasibility of making all-solution processed tandem white QLEDs by using the proposed ICL.

Inter-connecting layer (ICL) Light-emitting diodes Quantum dot Solution processed White tandem device

First

English

2-s2.0-85053840547

Scopus

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

Zhang，Heng,Wang，Siting,Sun，Xiaowei,et al. All Solution-Processed White Quantum-Dot Light-Emitting Diodes with Three-Unit Tandem Structure[C],2017:1691-1694.