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

引用

页码：140 / 143

页数：4

共 17 条

[1] Nb2O5 Schottky based ethanol vapour sensors: Effect of metallic catalysts
Ab Kadir, Rosmalini
Rani, Rozina Abdul
Zoolfakar, Ahmad Sabirin
Ou, Jian Zhen
Shafiei, Mahnaz
Wlodarski, Wojtek
Kalantar-zadeh, Kourosh
[J]. SENSORS AND ACTUATORS B-CHEMICAL, 2014, 202 : 74 - 82
[2] EFFICIENT CADMIUM-SULFIDE ON SILICON SOLAR-CELLS
ARYA, RR
SARRO, PM
LOFERSKI, JJ
[J]. APPLIED PHYSICS LETTERS, 1982, 41 (04) : 355 - 357
[3] Metal-oxide solid solutions for light alkane sensing
Carotta, M. C.
Cervi, A.
Giberti, A.
Guidi, V.
Malagu, C.
Martinelli, G.
Puzzovio, D.
[J]. 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
Carotta, M. C.
Cervi, A.
Fioravanti, A.
Gherardi, S.
Giberti, A.
Vendemiati, B.
Vincenzi, D.
Sacerdoti, M.
[J]. THIN SOLID FILMS, 2011, 520 (03) : 939 - 946
[5] Basic interpretation of thick film gas sensors for atmospheric application
Carotta, Maria Cristina
Benetti, Michele
Ferrari, Elena
Giberti, Alessio
Malagu, Cesare
Nagliati, Marco
Vendemiati, Beatrice
Martinelli, Giuliano
[J]. 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
FERRER, IJ
SALVADOR, P
[J]. JOURNAL OF APPLIED PHYSICS, 1989, 66 (06) : 2568 - 2577
[7] THE PHOTOCONDUCTION MECHANISMS OF SCREEN PRINTED CDS FILMS
FU, SL
WU, TS
HOUNG, MP
[J]. SOLAR ENERGY MATERIALS, 1985, 12 (04): : 309 - 317
[8] High-sensitivity detection of acetaldehyde
Giberti, A.
Carotta, M. C.
Fabbri, B.
Gherardi, S.
Guidi, V.
Malagu, C.
[J]. SENSORS AND ACTUATORS B-CHEMICAL, 2012, 174 : 402 - 405
[9] WO3 sensing properties enhanced by UV illumination: An evidence of surface effect
Giberti, A.
Malagu, C.
Guidi, V.
[J]. SENSORS AND ACTUATORS B-CHEMICAL, 2012, 165 (01) : 59 - 61
[10] Resonant photoactivation of cadmium sulfide and its effect on the surface chemical activity
Giberti, Alessio
Fabbri, Barbara
Gaiardo, Andrea
Guidi, Vincenzo
Malagu, Cesare
[J]. APPLIED PHYSICS LETTERS, 2014, 104 (22)

← 1 2 →