Paper Title:
Investigation of the Optical Properties of CdZnTe by IR Transmission and PL Spectra
  Abstract

The optical properties of CdZnTe crystals grown by vertical Bridgman method were investigated in detail by infrared (IR) transmission spectra and photoluminescence (PL) spectra. IR transmission measurements showed that according to the trends of the IR transmission with the wavenumbers, IR transmission spectra could be classified into four types, i.e. descending, ascending, low straight and high straight. Each of them indicated one type of CdZnTe crystals with specified properties. PL measurements revealed that the low-temperature PL spectra consisted of three emissions: the near-band-edge emission (I0) situated at 1.66eV related to the free and bound excitons, the donor-acceptor emission (I1) centered at 1.62eV related to the impurities, and a defect band emission (I2) centered at 1.50eV due to the dislocations. The full width at half maximum (FWHM) of I0 and the PL intensity ratios of I1/I0 and I2/I0 could be used to evaluate the properties of the crystals.

  Info
Periodical
Materials Science Forum (Volumes 475-479)
Main Theme
Edited by
Z.Y. Zhong, H. Saka, T.H. Kim, E.A. Holm, Y.F. Han and X.S. Xie
Pages
1841-1844
DOI
10.4028/www.scientific.net/MSF.475-479.1841
Citation
G. Q. Li, W. Q. Jie, "Investigation of the Optical Properties of CdZnTe by IR Transmission and PL Spectra", Materials Science Forum, Vols. 475-479, pp. 1841-1844, 2005
Online since
January 2005
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