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Study on Quantum Efficiency Improvement of Te-free Blue Emitting Zinc Selenide Quantum Dots
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Advisor
김상욱
Affiliation
아주대학교 일반대학원
Department
일반대학원 분자과학기술학과
Publication Year
2022-08
Publisher
The Graduate School, Ajou University
Keyword
Quantum DotsTe-free BlueZinc Selenide
Description
학위논문(석사)--아주대학교 일반대학원 :분자과학기술학과,2022. 8
Alternative Abstract
Recently, due to the miniaturization of display backlights, interest in blue light-emitting quantum dots is increasing. Quantum dots are attracting attention as a next-generation display material with high color gamut, but the development of blue QDs is necessary to realize perfect self-luminous QLEDs. The inherent inferior photophysical properties of blue light-emitting materials remain a challenge. Many groups have implemented Cd-based quantum dots, but it is unknown whether they can be used commercially due to the toxicity of Cds. Therefore, it is necessary to develop a Cd-free and eco-friendly blue QD. Here, we present the synthesis of ZnSe-based blue-emitting quantum dots using a fast-reactive bis(trimethylsilyl)selenium compound. Light emission of 440 nm to 460 nm or more was obtained by using the SILAR method, which is a method in which positive and negative ions are alternately added. We also performed spectral analysis according to the ratio of Zn to Se. In addition, high-efficiency blue QDs and a maximum quantum yield of 53.2% were achieved by using a hydrofluoric acid and zinc chloride additive to remove stacking defects in the ZnSe crystal structure to increase the luminous efficiency.
Language
eng
URI
https://aurora.ajou.ac.kr/handle/2018.oak/21000
Journal URL
https://dcoll.ajou.ac.kr/dcollection/common/orgView/000000031997
Type
Thesis
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