Low-cost, large-scale, ordered ZnO nanopillar arrays for light extraction efficiency enhancement in quantum dot light-emitting diodes

Author

Xuyong Yang ; Dev, Kapil ; Jianxiong Wang ; Mutlugun, Evren ; Cuong Dang ; Yongbiao Zhao ; Swee Tiam Tan ; Xiao Wei Sun ; Demir, Hilmi Volkan

Author_Institution

LUMINOUS! Center of Excellence for Semicond. Lighting & Displays, Nanyang Technol. Univ., Singapore, Singapore

fYear

2014

fDate

12-16 Oct. 2014

Firstpage

534

Lastpage

535

Abstract

We report a QLED with enhanced light outcoupling efficiency by applying a layer of periodic ZnO nanopillar arrays. The resulting QLED reaches the record external quantum efficiency (EQE) of 9.34% in green-emitting QLEDs with a similar device structure.

Keywords

II-VI semiconductors; integrated optics; integrated optoelectronics; light emitting diodes; nanophotonics; optical arrays; semiconductor quantum dots; wide band gap semiconductors; zinc compounds; ZnO; efficiency 9.34 percent; enhanced light outcoupling efficiency; external quantum efficiency; green-emitting QLED; light extraction efficiency enhancement; low-cost large-scale ordered nanopillar arrays; quantum dot light emitting diodes; Diffraction; Glass; Nanoscale devices; Organic light emitting diodes; Performance evaluation; Quantum dots; Zinc oxide; QLED; ZnO; light-emitting diodes; nanopillar; quantum dots;

fLanguage

English

Publisher

ieee

Conference_Titel

Photonics Conference (IPC), 2014 IEEE

Conference_Location

San Diego, CA

Type

conf

DOI

10.1109/IPCon.2014.6995486

Filename

6995486