Electrical, optical and sensing properties of photo-activated ZnO thin films

被引：7
作者：
Fabbri, B. [1 ,3 ]
Gaiardo, A. [1 ]
Giberti, A. [1 ,2 ]
Guidi, V. [1 ,2 ,3 ]
Malagu, C. [1 ,3 ]
Martucci, A. [4 ]
Sturaro, M. [4 ]
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
[4] Univ Padua, Dept Ind Engn, I-35131 Padua, Italy
来源：
28TH EUROPEAN CONFERENCE ON SOLID-STATE TRANSDUCERS (EUROSENSORS 2014) | 2014年 / 87卷
关键词：
Zinc oxide; room temperature gas sensing; photo enhanced gas sensing; nitrogen dioxide; ROOM-TEMPERATURE; OZONE DETECTION; OXIDE;
D O I：
10.1016/j.proeng.2014.11.605
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
Zinc oxide is a wide gap semiconductor whose chemical activity at surface can be enhanced by proper electromagnetic radiation. This property opens the door to room temperature gas sensing with this material. In this work, nanosized ZnO powder was synthesized by sol-gel technique. Then, structural and morphological characterizations were carried out by means of X -Ray Diffraction and SEM techniques. Thin films were deposited by spin coating technique on both glass and alumina substrates, to perform optical absorption spectra and electrical conductance measurements, respectively. The electro-optical properties were studied on the photo-activated films, in air and in nitrogen conditions, to investigate first on the basic surface-oxygen interaction in photo-activated condition. Then, gas measurements were also performed in air and in nitrogen, to acquire information on the photo -enhanced surface chemistry, in order to be applied to gas sensing. 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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页码：148 / 151
页数：4
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