산화아연/황화아연 양자점 나노결정에서의 향상된 자외선 방출 : Enhanced UV-Light Emission in ZnO/ZnS Quantum Dot Nanocrystals
Enhanced UV-Light Emission in ZnO/ZnS Quantum Dot Nanocrystals
- 주제(키워드) ZnO/ZnS , ZnO , nanocrystals , photoluminescence , UV-emission , ZnO/ZnS , ZnO , nanocrystals , photoluminescence , UV-emission
- 발행기관 한국재료학회
- 발행년도 2008
- 총서유형 Journal
- UCI G704-000279.2008.18.12.010
- KCI ID ART001299140
- 본문언어 영어
초록/요약
ZnO/ZnS core/shell nanocrystals (~5-7nm in diameter) with a size close to the quantum confinement regime were successfully synthesized using polyol and thermolysis. X-ray diffraction (XRD) and high-resolution transmission electron microscopy (HRTEM) analyses reveal that they exist in a highly crystalline wurtzite structure. The ZnO/ZnS nanocrystals show significantly enhanced UV-light emission (~384nm) due to effective surface passivation of the ZnO core, whereas the emission of green light (~550nm) was almost negligible. They also showed slight photoluminescence (PL) red-shift, which is possibly due to further growth of the ZnO core and/or the extension of the electron wave function to the shell. The ZnO/ZnS core/shell nanocrystals demonstrate strong potential for use as low-cost UV-light emitting devices.
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