Lin B.-YChen C.-HDing W.-CKuo Y.-PChen P.-YLu HLee C.-YChiu T.-LJIUN-HAW LEE2022-04-252022-04-2520210097966Xhttps://www.scopus.com/inward/record.uri?eid=2-s2.0-85113870596&doi=10.1002%2fsdtp.14847&partnerID=40&md5=d603c072de83179a932fcc1978ac4964https://scholars.lib.ntu.edu.tw/handle/123456789/607222We 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.Blue emissionQLEDXPSAluminum oxideCathodesEfficiencyII-VI semiconductorsNanocrystalsOxide mineralsQuantum efficiencySemiconductor quantum dotsX ray photoelectron spectroscopyZinc oxideAging treatmentAluminium-zincAluminum (Al)Electron transporting layerExternal quantum efficiencyHigh-efficiencyQuantum-dot light emitting diodesZinc oxide (ZnO)Organic light emitting diodes (OLED)[SDGs]SDG7conference paper10.1002/sdtp.148472-s2.0-85113870596