TY - JOUR
T1 - Investigation on defect levels in CdZnTe
T2 - Al using thermally stimulated current spectroscopy
AU - Nan, Ruihua
AU - Jie, Wanqi
AU - Zha, Gangqiang
AU - Wang, Tao
AU - Xu, Yadong
AU - Liu, Weihua
PY - 2010/9/1
Y1 - 2010/9/1
N2 - Defect levels present in as-grown semi-insulating CdZnTe :Al samples, taken from the top, middle and tail of the same ingot, have been investigated by thermally stimulated current (TSC) spectroscopy. Their trap signatures, particularly the thermal activation energy, capture cross section and concentration, were characterized and discussed, respectively, by fitting the measured TSC spectra with the simultaneous multiple peak analysis method. Furthermore, the deep donor levels EDD from the top, middle and tail were found to be positioned at 0.692 ± 0.659 eV and 0.618 eV below the conduction band, respectively, by fitting the ln(I ) versus1/kT plots above room temperature. The Fermi level was positioned at 0.716 ±0.05 eV by fitting the linear plots of the temperature dependence of resistivity, which was pinned by the EDD level near the middle of the band gap, which in turn caused the observed high resistivity in the as-grown CdZnTe: Al ingot.
AB - Defect levels present in as-grown semi-insulating CdZnTe :Al samples, taken from the top, middle and tail of the same ingot, have been investigated by thermally stimulated current (TSC) spectroscopy. Their trap signatures, particularly the thermal activation energy, capture cross section and concentration, were characterized and discussed, respectively, by fitting the measured TSC spectra with the simultaneous multiple peak analysis method. Furthermore, the deep donor levels EDD from the top, middle and tail were found to be positioned at 0.692 ± 0.659 eV and 0.618 eV below the conduction band, respectively, by fitting the ln(I ) versus1/kT plots above room temperature. The Fermi level was positioned at 0.716 ±0.05 eV by fitting the linear plots of the temperature dependence of resistivity, which was pinned by the EDD level near the middle of the band gap, which in turn caused the observed high resistivity in the as-grown CdZnTe: Al ingot.
UR - http://www.scopus.com/inward/record.url?scp=77957119744&partnerID=8YFLogxK
U2 - 10.1088/0022-3727/43/34/345104
DO - 10.1088/0022-3727/43/34/345104
M3 - 文章
AN - SCOPUS:77957119744
SN - 0022-3727
VL - 43
JO - Journal of Physics D: Applied Physics
JF - Journal of Physics D: Applied Physics
IS - 34
M1 - 345104
ER -