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Chinese Physics, 2006, Vol. 15(10): 2385-2388    DOI: 10.1088/1009-1963/15/10/033
CONDENSED MATTER: STRUCTURAL, MECHANICAL, AND THERMAL PROPERTIES Prev   Next  

The optical properties of MgxZn1-xO thin films

Zhang Xi-Jian(张锡健), Ma Hong-Lei(马洪磊), Li Yu-Xiang(李玉香), Wang Qing-Pu(王卿璞), Ma Jin(马瑾), Zong Fu-Jian(宗福建), and Xiao Hong-Di(肖洪地)
School of Physics and Microelectronics, Shandong University, Jinan 250100, China
Abstract  MgxZn1-xO thin films have been prepared on silicon substrates by radio frequency magnetron sputtering at 60℃. The thin films have hexagonal wurtzite single-phase structure and a preferred orientation with the c-axis perpendicular to the substrates. The refractive indices of MgxZn1-xO films are studied at room temperature by spectroscopic ellipsometry over the wavelength range of 400--760 nm at the incident angle of 70°. Both absorption coefficients and optical band gaps of MgxZn1-xO films are determined by the transmittance spectra. While Mg content is increasing, the absorption edges of MgxZn1-xO films shift to higher energies and band gaps linearly increase from 3.24.eV at x=0 to 3.90 eV at x=0.30. These results provide important information for the design and modelling of ZnO/ MgxZn1-xO heterostructure optoelectronic devices.
Keywords:  MgxZn1-xO films      optical properties      sputtering  
Received:  18 January 2006      Revised:  23 March 2006      Accepted manuscript online: 
PACS:  78.66.-w (Optical properties of specific thin films)  
  68.55.-a (Thin film structure and morphology)  
  78.20.Ci (Optical constants (including refractive index, complex dielectric constant, absorption, reflection and transmission coefficients, emissivity))  
Fund: Project supported by the Doctoral Program Foundation of State Education Department (Grant No 20020422056).

Cite this article: 

Zhang Xi-Jian(张锡健), Ma Hong-Lei(马洪磊), Li Yu-Xiang(李玉香), Wang Qing-Pu(王卿璞), Ma Jin(马瑾), Zong Fu-Jian(宗福建), and Xiao Hong-Di(肖洪地) The optical properties of MgxZn1-xO thin films 2006 Chinese Physics 15 2385

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