Pyroelectricity in alternating ultrathin organized molecular films incorporating barium ions

  • Shihong Ma*
  • , Shuhong Li
  • , Xingze Lu
  • , Wencheng Wang
  • , Genshui Wang
  • , Pulin Liu
  • , Shaoling Guo
  • , Junhao Chu
  • *Corresponding author for this work

Research output: Contribution to journalConference articlepeer-review

Abstract

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-1 at 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.

Original languageEnglish
Pages (from-to)107-112
Number of pages6
JournalProceedings of SPIE - The International Society for Optical Engineering
Volume4795
DOIs
StatePublished - 2002
Externally publishedYes
EventMaterials for Infrared Detectors II - Seattle, WA, United States
Duration: 8 Jul 20029 Jul 2002

Keywords

  • Dielectric characterization
  • Langmuir-Blodgett films
  • Metallic cation
  • Organic materials
  • Pyroelectricity

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