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题名: Studies on the defect structure for Cu(2+) in CdSe nanocrystals
作者: S. Y. Wu;  H. M. Zhang;  P. Xu;  S. X. Zhang
发表日期: 2010
摘要: The defect structure for Cu(2+) in CdSe nanocrystals is theoretically studied by analyzing the spin Hamiltonian parameters of this impurity center. This center is ascribed to Cu(2+) occupying the octahedral interstitial site, rather than the tetrahedral substitutional Cd(2+) site proposed by previous work. The Cu(2+) center exhibits slight terragonal elongation distortion (characterized by the elongation parameter rho approximate to 0.03) due to the Jahn-Teller effect. The theoretical spin Hamiltonian parameters and optical transition show good agreement with the experimental data. The above unusual defect structure (occupation and symmetry) for Cu(2+) in CdSe nanocrystals is discussed, as compared with the conventional trigonally distorted tetrahedral Cu(2+) centers in bulk II-VI semiconductors. (C) 2009 Elsevier B.V. All rights reserved.
KOS主题词: Electron paramagnetic resonance;  Electron paramagnetic resonance spectroscopy;  Electron nuclear double resonance;  Quantum dots;  Ultrastructure;  atomic fine structure;  Electron nuclear double resonance;  Ions;  Nanoparticles;  Resonance
刊名: Spectrochimica Acta Part a-Molecular and Biomolecular Spectroscopy
相关网址: <Go to ISI>://WOS:000274773700035
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Recommended Citation:
S. Y. Wu,H. M. Zhang,P. Xu,et al. Studies On The Defect Structure For Cu(2+) In Cdse Nanocrystals[J]. Spectrochimica Acta Part A-molecular And Biomolecular Spectroscopy,2010,75(1):230-234.

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