Detailed Information

Cited 0 time in webofscience Cited 1 time in scopus
Metadata Downloads

Performance Improvement of Quantum Dot Light-Emitting Diodes Using a ZnMgO Electron Transport Layer with a Core/Shell Structureopen access

Authors
Eun, Ye-BinJang, Gyeong-PilYang, Ji-HunKim, Su-YoungChae, Young-BinHa, Mi-YoungMoon, Dae-GyuKim, Chang-Kyo
Issue Date
Jan-2023
Publisher
MDPI Open Access Publishing
Keywords
quantum dot light-emitting diode; solution process; ZnMgO nanoparticles; core; shell structure; charge balance
Citation
Materials, v.16, no.2
Journal Title
Materials
Volume
16
Number
2
URI
https://scholarworks.bwise.kr/sch/handle/2021.sw.sch/22156
DOI
10.3390/ma16020600
ISSN
1996-1944
1996-1944
Abstract
Highly efficient and all-solution processed quantum dot light-emitting diodes (QLEDs) with high performance are demonstrated by employing ZnMgO nanoparticles (NPs) with core/shell structure used as an electron transport layer (ETL). Mg-doping in ZnO NPs exhibits a different electronic structure and degree of electron mobility. A key processing step for synthesizing ZnMgO NPs with core/shell structure is adding Mg in the solution in addition to the remaining Mg and Zn ions after the core formation process. This enhanced Mg content in the shell layer compared with that of the core X-ray photoelectron spectroscopy showed a higher number of oxygen vacancies for the ZnMgO core/shell structure, thereby enhancing the charge balance in the emitting layer and improving device efficiency. The QLED incorporating the as synthesized ZnMgO NP core/shell A exhibited a maximum luminance of 55,137.3 cd/m(2), maximum current efficiency of 58.0 cd/A and power efficiency of 23.3 lm/W. The maximum current efficiency and power efficiency of the QLED with ZnMgO NP core/shell A improved by as much as 156.3% and 113.8%, respectively, compared to the QLED with a Zn0.9Mg0.1O NP ETL, thus demonstrating the benefits of ZnMgO NPs with the specified core/shell structure.
Files in This Item
There are no files associated with this item.
Appears in
Collections
College of Engineering > Department of Display and Electronic Information Engineering > 1. Journal Articles

qrcode

Items in ScholarWorks are protected by copyright, with all rights reserved, unless otherwise indicated.

Related Researcher

Researcher Kim, CHANG KYO photo

Kim, CHANG KYO
College of Engineering (Department of Display and Electronic Information Engineering)
Read more

Altmetrics

Total Views & Downloads

BROWSE