NDLI: X-ray detectors based on $p^{+}-Si/n-ZnO$ abrupt heterojunctions

Content Provider	IEEE Xplore Digital Library
Author	Zhao Xiaolong He Yongning Chen Liang Liu Jinliang Ouyang Xiaoping
Copyright Year	2015
Description	Author affiliation: Radiat. Detection Res. Center, Northwest Inst. of Nucl. Technol., Xi'an, China (Chen Liang; Liu Jinliang; Ouyang Xiaoping) \|\| Sch. of Electron. & Inf. Eng., Xi'an Jiaotong Univ., Xi'an, China (Zhao Xiaolong; He Yongning)
Abstract	ZnO is a direct wide-band gap semiconductor with Eg=3.3 eV, which has high saturation velocity and is radiation tolerant as well. It can be expected being utilized for the room temperature nuclear radiation detector. In this paper, we fabricate the p+-Si/n-ZnO abrupt heterojunction and study the X-ray detection properties. The I-V characteristics were measured in the temperature range of -40 °C-40 °C. The built-in potential and the interface state density are separately calculated to be 0.25 eV and 2.1×1011 $cm^{-2}$ from the temperature dependent dark current. The detector exhibits photovoltaic behavior and shows linear photo-current response to the incident X-ray intensity. The open-circuit voltage is 0.21 V and the short-circuit current is 0.15 μA under the X-ray dose rate of 1.53 Gy/s. The sensitivities of the detector are 95 nC/Gy and 115 nC/Gy at the bias voltages of 0V and -5V respectively. The transient response presents the fast and stable response of the detector to the X-ray.
Sponsorship	IEEE
Starting Page	1
Ending Page	4
File Size	1195794
Page Count	4
File Format	PDF
e-ISBN	9781479982035
DOI	10.1109/ICSENS.2015.7370659
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2015-11-01
Publisher Place	South Korea
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Detectors Zinc oxide II-VI semiconductor materials Heterojunctions Films Temperature measurement Temperature X-ray detector ZnO heterojunction
Content Type	Text
Resource Type	Article

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