TY - JOUR
T1 - Study of polarization phenomena in Schottky CdTe diodes using infrared light illumination
AU - Sato, Goro
AU - Fukuyama, Taro
AU - Watanabe, Shin
AU - Ikeda, Hirokazu
AU - Ohta, Masayuki
AU - Ishikawa, Shin'Nosuke
AU - Takahashi, Tadayuki
AU - Shiraki, Hiroyuki
AU - Ohno, Ryoichi
PY - 2011/10/1
Y1 - 2011/10/1
N2 - Schottky CdTe diode detectors suffer from a polarization phenomenon, which is characterized by degradation of the spectral properties over time following exposure to high bias voltage. This is considered attributable to charge accumulation at deep acceptor levels. A Schottky CdTe diode was illuminated with an infrared light for a certain period during a bias operation, and two opposite behaviors emerged. The detector showed a recovery when illuminated after the bias-induced polarization had completely progressed. Conversely, when the detector was illuminated before the emergence of bias-induced polarization, the degradation of the spectral properties was accelerated. Interpretation of these effects and discussion on the energy level of deep acceptors are presented.
AB - Schottky CdTe diode detectors suffer from a polarization phenomenon, which is characterized by degradation of the spectral properties over time following exposure to high bias voltage. This is considered attributable to charge accumulation at deep acceptor levels. A Schottky CdTe diode was illuminated with an infrared light for a certain period during a bias operation, and two opposite behaviors emerged. The detector showed a recovery when illuminated after the bias-induced polarization had completely progressed. Conversely, when the detector was illuminated before the emergence of bias-induced polarization, the degradation of the spectral properties was accelerated. Interpretation of these effects and discussion on the energy level of deep acceptors are presented.
KW - CdTe
KW - Deep acceptor
KW - Gamma-ray
KW - Polarization
KW - Schottky diode
KW - X-ray
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U2 - 10.1016/j.nima.2011.01.159
DO - 10.1016/j.nima.2011.01.159
M3 - Article
AN - SCOPUS:80052922569
SN - 0168-9002
VL - 652
SP - 149
EP - 152
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
IS - 1
ER -