Development of Te-free blue-emitting ZnSe/ZnS Quantum Dots
- 주제(키워드) Quantum Dots
- 발행기관 아주대학교
- 지도교수 김상욱
- 발행년도 2021
- 학위수여년월 2021. 2
- 학위명 석사
- 학과 및 전공 일반대학원 분자과학기술학과
- 실제URI http://www.dcollection.net/handler/ajou/000000030836
- 본문언어 영어
- 저작권 아주대학교 논문은 저작권에 의해 보호받습니다.
초록/요약
Recently, as the resolution of the display being released increases, interest in quantum dots (QDs) with particle size of a few nanometers is increasing. QDs are regarded as a material for next-generation displays based on various characteristics like optical, magnetic property and high color reproducibility. Among others, blue emitting quantum dots have get a lot of attention due to light-emitting devices. In order to realize QLED that is perfectly self-luminous format, so essential that blue QDs develop. The development of the QDs of the Cd-free is necessary because the Cd used as the basis for many groups to implement blue QDs is toxic. We achieved emissions of 440-450 nm by repeatedly using the SILAR method, which involves alternate addition of cations and anions. To improve the quantum yield, we performed repeated ZnS coating. Finally, we used halide anion to conduct surface passivation and get a very efficient blue QDs and a maximum quantum yield of 64.0%. This is the highest yield reported for ZnSe/ZnS QDs in the 440-450nm range.
more목차
1. Introduction 1
2. Experimental Section 3
3. Results and Discussion 6
3.1. The blue-emitting ZnSe QDs 6
3.2. The optical properties of ZnSe/ZnS and halide passivation 7
3.3. The UV stability test of ZnSeTe/ZnSe/ZnS (Te 5%) and ZnSe/ZnS 8
4. Conclusion 10
5. References 25
