Pyroelectric figure of merit in alternating hemicyanine/NC Langmuir-Blodgett films incorporating barium ions

被引：1
|
作者：
Ma, Shihong [1 ]
Li, Shuhong
Wang, Wencheng
Wang, Genshui
Sun, Jinglan
Meng, Xiangjian
Chu, Junhao
机构：
[1] Fudan Univ, Dept Phys, State Key Lab Adv Photon Mat & Devices, Shanghai 200433, Peoples R China
[2] Fudan Univ, Dept Opt Sci & Engn, Shanghai 200433, Peoples R China
[3] Chinese Acad Sci, Natl Lab Infrared Phys, Shanghai 200083, Peoples R China
来源：
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS | 2006年 / 284卷
基金：
中国国家自然科学基金;
关键词：
pyroelectricity; Langmuir-Blodgett films; metallic cation; dielectric property;
D O I：
10.1016/j.colsurfa.2005.11.050
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Pyroelectric properties in alternating hemicyanine (DAEP)/nitrogencrown (NC) Langmuir-Blodgett (LB) films and effects of incorporating barium cations on pyroelectric behaviors have been investigated. Its pyroelectric coefficient measured is found to be 58 mu C m(-2) K-1 at 300 K. Their dielectric properties have been measured and used to determine the figures of merit in thermal devices. Relative permittivity (epsilon(r)) and dielectric loss values (tan delta) of pyroelectric films (in the range of 1-100 KHz) are found to be 2.34-1.96 and 0.08-0.04, respectively. These data give a maximum pyroelectric figure of merit of 150 mu C 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. (c) 2005 Elsevier B.V. All rights reserved.
引用
收藏
页码：74 / 77
页数：4
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