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

doi:10.1088/1674-1056/23/12/127801

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. CuIn_1-xCe_xTe₂ 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 E_g 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: CuIn_1-xCe_xTe₂ 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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Synthesis, structure, optical, and electric properties of Ce-doped CuInTe2 compound

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