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Proceedings Paper

Far-IR reflectance spectra analysis of CdZnTe and related materials
Author(s): Tzuen-Rong Yang; Sheng-Hong Jhang; Yen-Hao Shih; Fu-Chung Hou; Yu-Chang Yang; P. Becla; Der-Chi Tien; Zhe Chuan Feng
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Paper Abstract

Far-infrared (FIR) reflectance spectroscopy has been employed to study the optical properties for a series of bulk CdZnxTe1-x and CdSexTe1-x wafers. The zone-centre optical phonons for the ternary alloys show a variety of behavior patterns: they exhibit a "one-mode", "two-mode" or "intermediate-mode" behavior depending on the vibration characteristics of the end binary members. The CdSeTe called CST were found to be single-crystal with the zincblende structure. These four samples labeled with CST5, CST15, CST25, and CST35, which correspond with the composition of Se, 5%, 15%, 25%, 35%, respectively. The intensity of CdTe-like TO band decays with x increasing, and the peak position increases from 140 cm-1 to 145 cm-1. In the other hand, the intensity of CdSe-like TO band grows with x increasing, and the peak position of CdSe-like TO band increases from 174 cm-1 to 181 cm-1. We use the model of dielectric function and using Least-Square fit to find the optical and transport parameters. By the infrared spectra analysis, we found the conductivity of CdZnxTe1-x increase with increasing of x value and the conductivity of CdSexTe1-x decrease with increasing of x value.

Paper Details

Date Published: 11 September 2009
PDF: 9 pages
Proc. SPIE 7449, Hard X-Ray, Gamma-Ray, and Neutron Detector Physics XI, 74490L (11 September 2009); doi: 10.1117/12.825874
Show Author Affiliations
Tzuen-Rong Yang, National Taiwan Normal Univ. (Taiwan)
Sheng-Hong Jhang, National Taiwan Normal Univ. (Taiwan)
Yen-Hao Shih, National Taiwan Normal Univ. (Taiwan)
Fu-Chung Hou, National Taiwan Univ. (Taiwan)
Yu-Chang Yang, National Taiwan Univ. (Taiwan)
P. Becla, Massachusetts Institute of Technology (United Kingdom)
Der-Chi Tien, National Taipei Univ. of Technology (Taiwan)
Zhe Chuan Feng, National Taiwan Univ. (Taiwan)


Published in SPIE Proceedings Vol. 7449:
Hard X-Ray, Gamma-Ray, and Neutron Detector Physics XI
Ralph B. James; Larry A. Franks; Arnold Burger, Editor(s)

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