Pyroelectric and conduction properties of Z-type calix 4 acid Langmuir-Blodgett films

CAPAN, R., RAY, A. K., RICHARDSON, T. H., HASSAN, A. K. and DAVIS, F. (2005). Pyroelectric and conduction properties of Z-type calix 4 acid Langmuir-Blodgett films. Journal of Nanoscience and Nanotechnology, 5 (11), 1910-1914.

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Non-centrosymmetric Z-type Langmuir-Blodgett (LB) films were prepared by transferring a calix[4] acid monolayer from a subphase of Millipore water (18 M Omega cm(-1)) onto aluminised glass substrates. Electrical measurements were performed at room temperature on LB films with a sandwich structure comprising a 50 nm thick thermally evaporated aluminium film. A pyroelectric figure of merit of 2.23 mu C m(-2)K(-1) is reported for this LB system. The low voltage value of conductivity is 1.82 x 10(-12) S m(-1). The electrode-limited Schottky effect is responsible for the conduction mechanism at a relatively high field due to the dc bias and the barrier potential height is determined to be 1.72 eV. The ac conductance for both samples shows a typical power law dependence with a value of approximate to 0.86 for the exponent.

Item Type: Article
Research Institute, Centre or Group - Does NOT include content added after October 2018: Materials and Engineering Research Institute > Advanced Coatings and Composites Research Centre > Electronic Materials and Sensors Research Group
Identification Number:
Page Range: 1910-1914
Depositing User: Helen Garner
Date Deposited: 21 May 2010 09:34
Last Modified: 18 Mar 2021 21:15

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