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Proceedings Paper

Properties of PT/P(VDF-TrFE) pyroelectric sensor based on porous SiO2 substrate
Author(s): Jinhua Li; Ningyi Yuan; Helen L.W. Chan; Chung-Loong Choy
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Paper Abstract

Nanosized lead titanate (PT) powder obtained by the Sol-gel method was homogeneously mixed with vinylidene fluoride-trifluoroethylene[P(VDF-TrFE)]. The nanocomposite film was used as the sensing film of PT/P(VDF-TrFE) pyroelectric sensors, whose detective merit was about 20% higher than that of sensors using pure P(VDF-TrFE). Porous silicon with porosity of 69% prepared by electrochemical method was oxidized to porous SiO2 in wet oxygen. Such porous SiO2 was chosen as substrate, which can effectively decrease the heat loss due to condition of the substrate. The voltage responsivity was increased and the thermal fluctuation noise of the pyroelectric element was decreased significantly. The experimental results indicated the specific detectivity of PT/P(VDF-TrFE) pyroelectric sensors based on porous SiO2 substrate was nearly 2 orders of magnitude higher than that of the sensors on bulk SiO2 substrate formed under the same conditions.

Paper Details

Date Published: 30 October 2001
PDF: 7 pages
Proc. SPIE 4596, Advanced Photonic Sensors and Applications II, (30 October 2001); doi: 10.1117/12.447360
Show Author Affiliations
Jinhua Li, Hong Kong Polytechnic Univ. and Jiangsu Institute of Petrochemical Technology (Hong Kong)
Ningyi Yuan, Hong Kong Polytechnic Univ. and Jiangsu Institute of Petrochemical Technology (China)
Helen L.W. Chan, Hong Kong Polytechnic Univ. (Hong Kong)
Chung-Loong Choy, Hong Kong Polytechnic Univ. (Hong Kong)


Published in SPIE Proceedings Vol. 4596:
Advanced Photonic Sensors and Applications II

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