Investigation on blue quantum-dot light-emitting diode with positive aging treatment
Journal
Digest of Technical Papers - SID International Symposium
Journal Volume
52
Journal Issue
1
Pages
957-958
Date Issued
2021
Author(s)
Abstract
We have demonstrated a high efficiency blue quantum-dot lightemitting diode (QLED) with positive aging treatment. While device was statically stored 602 hrs, the external quantum efficiency (EQE) of QLED increased from 4.8% to 7.8%, which resulted from the enhancement in electron injection at quantum dot (QD)/ electron transporting layer (ETL) interface. It was confirmed by the measurement of the depth profile of X-ray photoelectron spectroscopy (XPS). It indicated that cathode material, aluminum (Al), diffused into ETL material, zinc oxide (ZnO), leading to aluminium zinc oxide (AZO) alloy, Al doped ZnO. ? 2021 SID.
Subjects
Blue emission
QLED
XPS
Aluminum oxide
Cathodes
Efficiency
II-VI semiconductors
Nanocrystals
Oxide minerals
Quantum efficiency
Semiconductor quantum dots
X ray photoelectron spectroscopy
Zinc oxide
Aging treatment
Aluminium-zinc
Aluminum (Al)
Electron transporting layer
External quantum efficiency
High-efficiency
Quantum-dot light emitting diodes
Zinc oxide (ZnO)
Organic light emitting diodes (OLED)
SDGs
Type
conference paper