Photo-activation of cadmium sulfide films for gas sensing

被引：7
作者：
Fabbri, Barbara [1 ]
Gaiardo, Andrea [1 ]
Guidi, Vincenzo [1 ,3 ]
Malagu, Cesare [1 ,3 ]
Giberti, Alessio [1 ,2 ]
机构：
[1] Univ Ferrara, Dept Phys & Earth Sci, Via Saragat 1-C, I-44122 Ferrara, Italy
[2] MIST ER Scrl, I-40129 Bologna, Italy
[3] CNR, INO, I-50124 Florence, Italy
来源：
28TH EUROPEAN CONFERENCE ON SOLID-STATE TRANSDUCERS (EUROSENSORS 2014) | 2014年 / 87卷
关键词：
Cadmium sulfide; Photo-activation; Photoconductance; Room temperature gas sensing; THIN-FILM; CDS; MECHANISMS; SENSITIVITY; SENSORS; AU;
D O I：
10.1016/j.proeng.2014.11.603
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
Photo-activation of semiconductor films for room temperature gas sensing is a research topic intensely studied during the last years. Even though the most investigated semiconductors in the field of conductometric gas sensors are metal oxides, cadmium sulfide shows very interesting photo-stimulated properties, in particular it shows chemoresistivity that can be activated by light at room temperature. In this work, the photo-enhanced sensing properties of CdS films toward five target gases are studied as a function of the wavelength of the impinging radiation. It resulted that the chemical activity of CdS at surface is strongly dependent on the exciting wavelength. The peak of the response was found for the wavelength equivalent to the bandgap energy, this meaning a bandgap-resonant behavior of the surface chemical activity that can possibly be employed for gas sensing applications. 2014 The Authors. Published by Eslevier Ltd. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/3.0/). Peer-review under responsibility of the scientific committee of Eurosensors 2014
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收藏
页码：140 / 143
页数：4
相关论文
共 17 条
[1]   Nb2O5 Schottky based ethanol vapour sensors: Effect of metallic catalysts [J].
Ab Kadir, Rosmalini ;
Rani, Rozina Abdul ;
Zoolfakar, Ahmad Sabirin ;
Ou, Jian Zhen ;
Shafiei, Mahnaz ;
Wlodarski, Wojtek ;
Kalantar-zadeh, Kourosh .
SENSORS AND ACTUATORS B-CHEMICAL, 2014, 202 :74-82
[2]   EFFICIENT CADMIUM-SULFIDE ON SILICON SOLAR-CELLS [J].
ARYA, RR ;
SARRO, PM ;
LOFERSKI, JJ .
APPLIED PHYSICS LETTERS, 1982, 41 (04) :355-357
[3]   Metal-oxide solid solutions for light alkane sensing [J].
Carotta, M. C. ;
Cervi, A. ;
Giberti, A. ;
Guidi, V. ;
Malagu, C. ;
Martinelli, G. ;
Puzzovio, D. .
SENSORS AND ACTUATORS B-CHEMICAL, 2008, 133 (02) :516-520
[4]   A novel ozone detection at room temperature through UV-LED-assisted ZnO thick film sensors [J].
Carotta, M. C. ;
Cervi, A. ;
Fioravanti, A. ;
Gherardi, S. ;
Giberti, A. ;
Vendemiati, B. ;
Vincenzi, D. ;
Sacerdoti, M. .
THIN SOLID FILMS, 2011, 520 (03) :939-946
[5]   Basic interpretation of thick film gas sensors for atmospheric application [J].
Carotta, Maria Cristina ;
Benetti, Michele ;
Ferrari, Elena ;
Giberti, Alessio ;
Malagu, Cesare ;
Nagliati, Marco ;
Vendemiati, Beatrice ;
Martinelli, Giuliano .
SENSORS AND ACTUATORS B-CHEMICAL, 2007, 126 (02) :672-677
[6]   PHOTOLUMINESCENCE AND ELECTROLUMINESCENCE MECHANISMS AT POLYCRYSTALLINE CDS IN AIR AND IN CONTACT WITH AQUEOUS-ELECTROLYTES [J].
FERRER, IJ ;
SALVADOR, P .
JOURNAL OF APPLIED PHYSICS, 1989, 66 (06) :2568-2577
[7]   THE PHOTOCONDUCTION MECHANISMS OF SCREEN PRINTED CDS FILMS [J].
FU, SL ;
WU, TS ;
HOUNG, MP .
SOLAR ENERGY MATERIALS, 1985, 12 (04) :309-317
[8]   High-sensitivity detection of acetaldehyde [J].
Giberti, A. ;
Carotta, M. C. ;
Fabbri, B. ;
Gherardi, S. ;
Guidi, V. ;
Malagu, C. .
SENSORS AND ACTUATORS B-CHEMICAL, 2012, 174 :402-405
[9]   WO3 sensing properties enhanced by UV illumination: An evidence of surface effect [J].
Giberti, A. ;
Malagu, C. ;
Guidi, V. .
SENSORS AND ACTUATORS B-CHEMICAL, 2012, 165 (01) :59-61
[10]   Resonant photoactivation of cadmium sulfide and its effect on the surface chemical activity [J].
Giberti, Alessio ;
Fabbri, Barbara ;
Gaiardo, Andrea ;
Guidi, Vincenzo ;
Malagu, Cesare .
APPLIED PHYSICS LETTERS, 2014, 104 (22)
12