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Chin. Phys. B, 2014, Vol. 23(12): 127801    DOI: 10.1088/1674-1056/23/12/127801
CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES Prev   Next  

Synthesis, structure, optical, and electric properties of Ce-doped CuInTe2 compound

Fu Li (付丽), Guo Yong-Quan (郭永权)
School of Energy Power and Mechanical Engineering, North China Electric Power University, Beijing 102206, China
Abstract  Ce-doped CuInTe2 (CICT) semiconducting compounds are successfully synthesized. The phase structures, optical, and electric properties are investigated using powder X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), X-ray photoelectron spectrometer (XPS), Raman spectrometer, ultraviolet and visible spectrophotometer (UV-Vis), and a standard four-probe method. CuIn1-xCexTe2 crystallizes into a tetragonal structure with predominant orientation along the [112] direction. The lattice parameters are a=6.190(6) Å–6.193(0) Å and c=12.406(5) Å–12.409(5) Å. Ce prefers to occupy the 4b crystal position. According to the analysis of XPS spectra, Ce shows the mixture of valences 4+ and 3+. Raman spectra reveal that the photon vibrating model in the CICT follows A1 mode in a wavenumber range of 123 cm-1–128 cm-1. UV-Vis spectra show that the band gap Eg values before and after 0.1 mole Ce doped into CuInTe2 are 1.28 eV and 1.16 eV, respectively. It might be due to the mixture of valences for Ce. Ce doped into CuInTe2 still shows the semiconductor characteristics.
Keywords:  CuIn1-xCexTe2      chalcopyrite      Raman spectrum      band gap      semiconductor  
Received:  04 May 2014      Revised:  14 July 2014      Accepted manuscript online: 
PACS:  78.20.-e (Optical properties of bulk materials and thin films)  
  61.50.-f (Structure of bulk crystals)  
  71.15.Ap (Basis sets (LCAO, plane-wave, APW, etc.) and related methodology (scattering methods, ASA, linearized methods, etc.))  
  72.20.-i (Conductivity phenomena in semiconductors and insulators)  
Fund: Project supported by the National Natural Science Foundation of China (Grant No. 11274110).
Corresponding Authors:  Guo Yong-Quan     E-mail:  yqguo@ncepu.edu.cn

Cite this article: 

Fu Li (付丽), Guo Yong-Quan (郭永权) Synthesis, structure, optical, and electric properties of Ce-doped CuInTe2 compound 2014 Chin. Phys. B 23 127801

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