Optical properties of ternary alloyed ZnxCd1-xSe semiconductor nanocrystals

I. Han Chen, Kuan Wen Wang, Shu Ru Chung

研究成果: 書貢獻/報告類型會議論文篇章同行評審

摘要

In this study, ternary alloyed ZnxCd1-xSe (x=0, 0.2, 0.5, 0.8 and 1) semiconductor nanocrystals with high quality are synthesized by a high temperature decomposition route. The effect of Zn content (x) of Zn xCd1-xSe semiconductor nanocrystals on their physical properties is investigated by controlling the Zn/Cd ratios. The optical properties and morphologies of the prepared nanocrystals are measured by FL, UV-Vis and TEM techniques. The actual composition of the prepared nanocrystals based on the ICP results is Zn0.03Cd0.97Se, Zn 0.12Cd0.88Se, and Zn0.38Cd0.62Se when Zn content is 0.2, 0.5, and 0.8, respectively. The fluorescence properties of the obtained alloyed ZnxCd1-xSe nanocrystals posses pure green light color and narrow particle size distribution (FWHM=28-30 nm). It is found that the emission wavelength of nanocrystals shifts from 510 to 545 nm with increasing Zn content from 0 to 0.8, although based on the TEM measurements, the particle sizes of ZnxCd1-xSe nanocrystal for different Zn content (0-0.8) are almost about 3.2 nm. Therefore, the wavelength shift and nonlinear optical property of the ZnxCd 1-xSe nanocrystals is not caused by the particle size but the compositional effect..

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主出版物標題Technical Proceedings of the 2011 NSTI Nanotechnology Conference and Expo, NSTI-Nanotech 2011
頁面339-342
頁數4
出版狀態已出版 - 2011
事件Nanotechnology 2011: Advanced Materials, CNTs, Particles, Films and Composites - 2011 NSTI Nanotechnology Conference and Expo, NSTI-Nanotech 2011 - Boston, MA, United States
持續時間: 13 6月 201116 6月 2011

出版系列

名字Technical Proceedings of the 2011 NSTI Nanotechnology Conference and Expo, NSTI-Nanotech 2011
1

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???event.eventtypes.event.conference???Nanotechnology 2011: Advanced Materials, CNTs, Particles, Films and Composites - 2011 NSTI Nanotechnology Conference and Expo, NSTI-Nanotech 2011
國家/地區United States
城市Boston, MA
期間13/06/1116/06/11

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