TY - JOUR
T1 - Characterization of CdZnTe co-doped with indium and lead
AU - Zaman, Yasir
AU - Jie, Wanqi
AU - Wang, Tao
AU - He, Yihui
AU - Xu, Lingyan
AU - Guo, Rongrong
AU - Xu, Yadong
AU - Zha, Gangqiang
N1 - Funding Information:
This work was financially supported by National Natural science foundation of China with the grant numbers 51372205 , 50902114 and 51202197 .
PY - 2015/1/11
Y1 - 2015/1/11
N2 - Indium and lead co-doped Cd0.9Zn0.1Te (CZT:(In,Pb)) were characterized by using I-V measurement, thermally stimulated current (TSC) spectroscopy and time-of-flight (TOF). The concentration of doping level of In and Pb was 10 ppm and 2 ppm, respectively. I-V curves showed that CZT:(In,Pb) possessed the resistivity as high as 1.8 × 1010 Ω cm, and the mobility (μ) of about 868 cm2/V s, which is considered acceptable for detector's fabrication. However, the carrier life time (τ) was only 9.44 × 10-7 s. Therefore, the μτ (mobility life time product) value was low. TSC results showed thirteen different trap levels, which were much more than that in Indium doped CZT crystal. Several special traps associated with lead were found, which might be the reason for the low carrier life time.
AB - Indium and lead co-doped Cd0.9Zn0.1Te (CZT:(In,Pb)) were characterized by using I-V measurement, thermally stimulated current (TSC) spectroscopy and time-of-flight (TOF). The concentration of doping level of In and Pb was 10 ppm and 2 ppm, respectively. I-V curves showed that CZT:(In,Pb) possessed the resistivity as high as 1.8 × 1010 Ω cm, and the mobility (μ) of about 868 cm2/V s, which is considered acceptable for detector's fabrication. However, the carrier life time (τ) was only 9.44 × 10-7 s. Therefore, the μτ (mobility life time product) value was low. TSC results showed thirteen different trap levels, which were much more than that in Indium doped CZT crystal. Several special traps associated with lead were found, which might be the reason for the low carrier life time.
KW - A1 characterization
KW - A1 defects
KW - A1 doping
KW - A2 bridgman technique
KW - B1 cadmium compounds
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U2 - 10.1016/j.nima.2014.10.010
DO - 10.1016/j.nima.2014.10.010
M3 - Article
AN - SCOPUS:84908541935
VL - 770
SP - 48
EP - 51
JO - Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
JF - Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
SN - 0168-9002
ER -