TY - JOUR
T1 - Noise sources and their limitations on the performance of compound semiconductor hard radiation detectors
AU - Liu, Zhifu
AU - Peters, J. A.
AU - Kim, Joon Il
AU - Das, Sanjib
AU - McCall, Kyle M.
AU - Wessels, Bruce W.
AU - He, Yihui
AU - Lin, Wenwen
AU - Kanatzidis, Mercouri G.
N1 - Funding Information:
This work was supported by the Department of Homeland Security ARI, USA program with grant 2014-DN-077-ARI086-01. This work made use of the Materials Processing and Microfabrication Facility supported by the MRSEC program of the National Science Foundation, USA (DMR-1720139) at the Materials Research Center of Northwestern University.
Funding Information:
This work was supported by the Department of Homeland Security ARI, USA program with grant 2014-DN-077-ARI086-01 . This work made use of the Materials Processing and Microfabrication Facility supported by the MRSEC program of the National Science Foundation, USA ( DMR-1720139 ) at the Materials Research Center of Northwestern University.
Publisher Copyright:
© 2018 Elsevier B.V.
PY - 2019/2/1
Y1 - 2019/2/1
N2 - We report on the measurement of frequency dependent noise spectra of photoconductive ternary compounds Cs3Sb2I9, Rb3Sb2I9, Hg3Se2I2, and TlSn2I5 for hard radiation detectors. The major sources of noise in these detectors are attributed to pickup noise, white noise, and frequency related 1/f noise. At low frequencies, the noise spectral density function exhibited 1/fα behavior where α is less than or equal to one. For those samples with α equal to one, radiation detection performances of the detectors, in terms of spectral measurements, have been reported in previous publications. The origin of 1/f noise of those samples is attributed to carrier fluctuations associated with deep centers/trapped holes. For those samples with α less than one, the origin of the deviation from a linear 1/f dependence is unknown and currently under investigation. However, this deviation is correlated with higher background white noise and lowered detector performance, and thus indicates that the material needs to be further optimized. Noise measurements are a useful indicator for screening prospective materials and samples for detectors.
AB - We report on the measurement of frequency dependent noise spectra of photoconductive ternary compounds Cs3Sb2I9, Rb3Sb2I9, Hg3Se2I2, and TlSn2I5 for hard radiation detectors. The major sources of noise in these detectors are attributed to pickup noise, white noise, and frequency related 1/f noise. At low frequencies, the noise spectral density function exhibited 1/fα behavior where α is less than or equal to one. For those samples with α equal to one, radiation detection performances of the detectors, in terms of spectral measurements, have been reported in previous publications. The origin of 1/f noise of those samples is attributed to carrier fluctuations associated with deep centers/trapped holes. For those samples with α less than one, the origin of the deviation from a linear 1/f dependence is unknown and currently under investigation. However, this deviation is correlated with higher background white noise and lowered detector performance, and thus indicates that the material needs to be further optimized. Noise measurements are a useful indicator for screening prospective materials and samples for detectors.
KW - Electronics
KW - Noise
KW - Radiation detector
KW - Semiconductor
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U2 - 10.1016/j.nima.2018.11.013
DO - 10.1016/j.nima.2018.11.013
M3 - Article
AN - SCOPUS:85057847036
SN - 0168-9002
VL - 916
SP - 133
EP - 140
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
ER -