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5 December 2002 Pyroelectricity in alternating ultrathin organized molecular films incorporating barium ions
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Pyroelectric properties in alternating DAEP/NC Langmuir-Blodgett (LB) films and effects of incorporating the barium cations on pyroelectric behaviors have been investigated. Its pyroelectric coefficient measured is found to be 58μC m-2 K-1at 300K. The dielectric properties have been measured and used to determine the figures of merit in thermal devices. Relative permittivity εr and dielectric loss values tanδ of pyroelectric films (in the range of 1KHz - 100KHz) are 2.34~1.96 and 0.08~0.04, respectively. These data give a maximum pyroelectric figure of merit of 150μC m-2 K-1 in the alternating LB films incorporating barium ions. The effects of different deposition on pyroelectric properties are also discussed in this paper. It is indicated that the alternating LB films is promising in the field of pyroelectricity and pyroelectric infrared detector.
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Shihong Ma, Shuhong Li, Xingze Lu, Wencheng Wang, Genshui Wang, Pulin Liu, Shaoling Guo, and Junhao Chu "Pyroelectricity in alternating ultrathin organized molecular films incorporating barium ions", Proc. SPIE 4795, Materials for Infrared Detectors II, (5 December 2002);

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