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30 March 2010 Environmental sensing in composite oxide semiconductor films
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Multicomponent semiconductor oxides mainly composed of elements like indium, zinc, tin or gallium are very promising new class of materials for application in transparent electronics, multifunctional sensors and other electronic applications. The major characteristic of these materials is high mobility, and the electrical behavior is a consequence of a conduction band primarily derived from spherically symmetric heavy-metal cationns orbital with (n-1)d10ns0 (n ≥4) electronic configuration. The carrier transport becomes insensitive to the degree of disorder of the film, and makes this class of quasi-polycrystalline and amorphous semiconductors attractive for numerous applications.We report here on the environmental sensing, such as ultra-violet-radiation and various gases of pulsed-laser deposited composite semiconductor films. These films demonstrate outstanding sensing capability from measuring the surface resistivity taking into account the absorption of sensing species. Our results show new possibilities for the low-cost high performance environmental sensors for numerous potential applications. The details of the results will be presented.
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A. K. Pradhan, R. Mundle, G. Kogo, R. B. Konda, O. Bamiduro, O. Yasar, K. Zhang, M. Bahoura, F. Williams, and K. Song "Environmental sensing in composite oxide semiconductor films", Proc. SPIE 7646, Nanosensors, Biosensors, and Info-Tech Sensors and Systems 2010, 76460C (30 March 2010); doi: 10.1117/12.847287;

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