Correlation between Te-rich Particles in CdZnTe Crystals and Corresponding PL Spectra

doi:10.3724/SP.J.1077.2011.00359

Journal of Inorganic Materials ›› 2011, Vol. 26 ›› Issue (4): 359-363.DOI: 10.3724/SP.J.1077.2011.00359

• Research Paper • Previous Articles Next Articles

Correlation between Te-rich Particles in CdZnTe Crystals and Corresponding PL Spectra

XU Ya-Dong,JIE Wan-Qi,WANG Tao,YU Peng-Fei,DU Yuan-Yuan,HE Yi-Hui

State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi’an 710072, China

Received:2010-06-29 Revised:2010-07-27 Published:2011-04-20 Online:2011-04-22
Supported by:
National Natural Science Foundation of China (50872111 , 50902114); Programme of Introducing Talents of Discipline to Universities (B08040)

Abstract

Abstract: Micron-scale Te-rich particles presented in CdZnTe crystals were directly observed using infrared transmission microscopy (IRTM). The generation of various Te-rich particles was discussed in conjunction with the growth conditions. In order to evaluate the impurities and defects behaviors , and to examine the crystalline quality, photoluminescence (PL) spectra were obtained at 10 K. The corresponding resistivity was evaluated simultaneously. The correlation between different shaped Te-rich particles in CdZnTe crystals and the corresponding PL spectra at 10 K was concluded compared with the characterized photo-peak in PL spectra. Well-defined sphere, hexagonal and triangular shaped incoherent Te-rich particles were generally presented in CdZnTe crystals grown from the charge with excess Te, which the ( D⁰, X) peak usually dominated in the PL spectra. Cross-shaped Te-rich particles were found in CdZnTe crystals grown under stoichiometric condition where the DAP peak dominated in the PL spectra. Star-shaped Te-rich particles were normally obtained in CdZnTe crystals under Cd-rich conditions where the FWHM of ( D⁰, X) peak was wide .

Key words: CdZnTe crystal, infrared transmission microscopy, Te-rich particles, PL spectra

CLC Number:

TN304

XU Ya-Dong,JIE Wan-Qi,WANG Tao,YU Peng-Fei,DU Yuan-Yuan,HE Yi-Hui. Correlation between Te-rich Particles in CdZnTe Crystals and Corresponding PL Spectra[J]. Journal of Inorganic Materials, 2011, 26(4): 359-363.

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Correlation between Te-rich Particles in CdZnTe Crystals and Corresponding PL Spectra

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