TY - JOUR
T1 - Effects of charge carrier density of ZnO film used in UV sensors
T2 - difficulties in measurement and rectification method
AU - Seeneevassen, Seydiren
AU - Kashan, Mohammad Ali Mohammadzadeh
AU - Ramakrishnan, N.
N1 - Funding Information:
N Ramakrishnan thanks Piezo Parts Japan Co., Ltd.’s support and Monash University Malaysia ILL 2019 Grant.
Publisher Copyright:
© 2020 IOP Publishing Ltd Printed in the UK
Copyright:
Copyright 2020 Elsevier B.V., All rights reserved.
PY - 2021/3
Y1 - 2021/3
N2 - In this Technical Note, we demonstrate a rectification method to enable the use of zinc oxide (ZnO) films in conductometric ultraviolet (UV) sensors. The phenomenon of persistent conductivity has long impeded the employment of ZnO films as conductometric UV sensors and eventually yields photo-induced current saturation in the film. To address this problem, we propose measuring the change in current in a transient response compromising of an OFF period of 60 s followed by an ON period of 20 s. In addition, we have investigated the effects of temperature and relative humidity, and dyanamic response of the sensor for different UV intensities. The experimental result shows that this measurement technique allows the ZnO film to act as a conductometric sensor even after prolonged exposures.
AB - In this Technical Note, we demonstrate a rectification method to enable the use of zinc oxide (ZnO) films in conductometric ultraviolet (UV) sensors. The phenomenon of persistent conductivity has long impeded the employment of ZnO films as conductometric UV sensors and eventually yields photo-induced current saturation in the film. To address this problem, we propose measuring the change in current in a transient response compromising of an OFF period of 60 s followed by an ON period of 20 s. In addition, we have investigated the effects of temperature and relative humidity, and dyanamic response of the sensor for different UV intensities. The experimental result shows that this measurement technique allows the ZnO film to act as a conductometric sensor even after prolonged exposures.
KW - Measurement
KW - Photo-induced current
KW - Transient response
KW - UV sensor
KW - ZnO
UR - http://www.scopus.com/inward/record.url?scp=85098662093&partnerID=8YFLogxK
U2 - 10.1088/1361-6501/abcbcc
DO - 10.1088/1361-6501/abcbcc
M3 - Article
AN - SCOPUS:85098662093
SN - 0957-0233
VL - 32
JO - Measurement Science and Technology
JF - Measurement Science and Technology
IS - 3
M1 - 037002
ER -