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报道两亲性染料半花菁(DAEP)与隔层材料氮冠醚(NC)交替LB膜的热释电效应以及掺杂金属离子(Ba2+)对LB膜热释电性能的影响.发现所测样品的热释电系数p高达58μCm-2K-1;在频率为1kHz—100kHz的范围内,其εr和tanδ的数值分别为2.34—1.96和0.08—0.04.并讨论了不同成膜方式和掺杂金属离子Ba2+对LB膜热释电性能影响的物理机理.
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关键词:
- LB膜(有序组装超薄膜) /
- 热释电效应 /
- 介电性能
Pyroelectric properties in alternating DAEP/NC Langmuir-Blodgett (LB) films and effects of incorporating the barium cations on pyroelectric behaviours have been investigated.The pyroelectric coefficient measured is found to be 58μCm-2K-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. The effects of different deposition and incorporated metal ions 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.-
Keywords:
- LB films (ordered ultrathin organized molecular films) /
- pyroelectric effects /
- dielectric characterization
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