TY - JOUR
T1 - Ultra-high performance self-powered radiation detector based on Si heterojunction
AU - Gao, Runlong
AU - Tao, Ke
AU - Wan, Pengying
AU - Li, Yang
AU - Zhao, Kuo
AU - Du, Xue
AU - Li, Hui
AU - Jia, Rui
AU - Ouyang, Xiaoping
AU - Liu, Linyue
N1 - Publisher Copyright:
© 2021 Elsevier B.V.
PY - 2021/12/21
Y1 - 2021/12/21
N2 - Self-powered detectors are highly significative in the applications of radiation detection in some harsh or limited space environment compared with the conventional detectors. Hence, we present a self-powered radiation detector with heterojunction structure formed by an ultra-thin oxide layer combined with heavily doped polycrystalline silicon layer. One outstanding advantage of the heterojunction structure is selective collection of carriers for lowering the recombination of signal carriers. The electrical characteristics were investigated from current–voltage and capacitance–voltage measurements, and the capability of radiation detection were performed by X-ray and α-sources. In the self-powered mode, detector showed low dark current of 1.5 nA/cm2, good linear response to X-ray dose rate, perfect charge collection efficiency of more than 87%, and superior energy resolution within 2.2% for 239Pu α-source spectral measurement. Besides, performance of the detector at the reverse bias from 0 V to 50 V were tested to further verify the detector's reliability.
AB - Self-powered detectors are highly significative in the applications of radiation detection in some harsh or limited space environment compared with the conventional detectors. Hence, we present a self-powered radiation detector with heterojunction structure formed by an ultra-thin oxide layer combined with heavily doped polycrystalline silicon layer. One outstanding advantage of the heterojunction structure is selective collection of carriers for lowering the recombination of signal carriers. The electrical characteristics were investigated from current–voltage and capacitance–voltage measurements, and the capability of radiation detection were performed by X-ray and α-sources. In the self-powered mode, detector showed low dark current of 1.5 nA/cm2, good linear response to X-ray dose rate, perfect charge collection efficiency of more than 87%, and superior energy resolution within 2.2% for 239Pu α-source spectral measurement. Besides, performance of the detector at the reverse bias from 0 V to 50 V were tested to further verify the detector's reliability.
KW - Radiation detection
KW - Self-powered detector
KW - Si heterojunction
UR - https://www.scopus.com/pages/publications/85117861467
U2 - 10.1016/j.nima.2021.165894
DO - 10.1016/j.nima.2021.165894
M3 - 文章
AN - SCOPUS:85117861467
SN - 0168-9002
VL - 1020
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
M1 - 165894
ER -