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@ARTICLE{Ghosh:838878,
author = {Ghosh, A. and Schneller, T. and Waser, R. and Majumder, S.
B.},
title = {{U}nderstanding on the selective carbon monoxide sensing
characteristics of copper oxide-zinc oxide composite thin
films},
journal = {Sensors and actuators / B},
volume = {253},
issn = {0925-4005},
address = {Amsterdam [u.a.]},
publisher = {Elsevier Science},
reportid = {FZJ-2017-07384},
pages = {685 - 696},
year = {2017},
abstract = {In the present work we have demonstrated CuO-ZnO composite
thin film with optimized CuO content selectively sense
carbon monoxide gas. The ‘n’-type gas sensing
characteristics of these composite films are changed to
‘p’-type beyond 8.0 $mol\%$ CuO contents. Through the
analyses of photoluminescence spectra in conjunction with
XPS we have demonstrated that up to 33.0 $mol\%$ CuO
contents the gas sensing characteristics of the composite
films are controlled by the type of point defects (oxygen
vacancies, zinc interstitials, and copper vacancies) in CuO
and ZnO grains. We have hypothesized that these point
defects help to chemi-absorb oxygen and CO preferentially on
ZnO and CuO grains respectively to yield selective carbon
monoxide sensing of ZnO-CuO composite film with 7.0 $mol\%$
CuO contents. Beyond 33.0 $mol\%$ CuO contents the effect of
point defects diminishes and the gas sensing characteristic
are grossly controlled by the nature of the CuO grains
covering ZnO grains in the composite films. Our work
provides comprehensive insight towards the understanding of
the gas sensing characteristics of hetero-composite thin
films deposited using a mixed precursor sol.},
cin = {PGI-7 / JARA-FIT},
ddc = {530},
cid = {I:(DE-Juel1)PGI-7-20110106 / $I:(DE-82)080009_20140620$},
pnm = {524 - Controlling Collective States (POF3-524)},
pid = {G:(DE-HGF)POF3-524},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000411124800079},
doi = {10.1016/j.snb.2017.06.154},
url = {https://juser.fz-juelich.de/record/838878},
}