마이크로리액터를 이용한 전구체 유속에 따른 CdSe/ZnS 양자점의 광학특성
- Title
- 마이크로리액터를 이용한 전구체 유속에 따른 CdSe/ZnS 양자점의 광학특성
- Other Titles
- Optical Characteristics of CdSe/ZnS Quantum Dot with Precursor Flow Rate Synthesized by using Microreactor
- Author
- 좌용호
- Keywords
- Quantum Dots; Core/Shell; Micro-Reactor; Passivation; Photoluminescence
- Issue Date
- 2016-04
- Publisher
- 한국분말야금학회
- Citation
- 한국분말야금학회지, v. 23, No. 2, Page. 91-94
- Abstract
- High-quality colloidal CdSe/ZnS (core/shell) is synthesized using a continuous microreactor. The particle size of the synthesized quantum dots (QDs) is a function of the precursor flow rate; as the precursor flow rate increases, the size of the QDs decreases and the band gap energy increases. The photoluminescence properties are found to depend strongly on the flow rate of the CdSe precursor owing to the change in the core size. In addition, a gradual shift in the maximum luminescent wave (λmax) to shorter wavelengths (blue shift) is found owing to the decrease in the QD size in accordance with the quantum confinement effect. The ZnS shell decreases the surface defect concentration of CdSe. It also lowers the thermal energy dissipation by increasing the concentration of recombination. Thus, a relatively high emission and quantum yield occur because of an increase in the optical energy emitted at equal concentration. In addition, the maximum quantum yield is derived for process conditions of 0.35 ml/min and is related to the optimum thickness of the shell material.
- URI
- http://db.koreascholar.com/Article?code=314387https://repository.hanyang.ac.kr/handle/20.500.11754/102277
- ISSN
- 2287-8173; 1225-7591
- Appears in Collections:
- COLLEGE OF ENGINEERING SCIENCES[E](공학대학) > MATERIALS SCIENCE AND CHEMICAL ENGINEERING(재료화학공학과) > Articles
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