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Study of Cadmium-Doped Zinc Oxide Nanocrystals with Composition and Size Dependent Band Gaps
Hai-xiao Zhang, Yue-tao Yang, Xiao-jun Liu
Key Laboratory of Modern Acoustics, Ministry of Education, Institute of Acoustics, Nanjing University, Nanjing 210093, China
Abstract:
Cadmium-doped zinc oxide nanocrystals in the quantum confinement region have been firstly synthesized by a fast and facile sonochemical method.The alloyed structure of the nanocrystals is confirmed by X-ray diffraction,transmission electron microscopy,and infrared analysis.With the increase of cadmium to zinc molar ratio from 0 to 2.0,the crystallite sizes of the samples decrease from 5.1 nm to 2.6 nm,and the band gaps of the samples show a red shift then a blue shift,and a red shift again.The variations of band gaps of the samples can be interpreted by the crystallite size and the composition.It is found that both the non-thermal equilibrium environment established in the sonochemical reaction and the coordination ability of triethylene glycol solvent play crucial roles in the current preparation.
Key words:  Alloyed nanocrystal  Structure  Spectroscopy  Sonochemistry
FundProject:This work was supported by the National Basic Research Program of China (No.2012CB921504) and the National Natural Science Foundation of China (No.11074127).
镉掺杂氧化锌纳米晶禁带宽度的尺寸效应和掺杂效应研究
张海啸, 杨跃涛, 刘晓峻
南京大学近代声学教育部重点实验室, 声学研究所, 南京 210093
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DOI:10.1063/1674-0068/31/cjcp1708181
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