朗缪尔铁电聚合物薄膜的电学特性:高热释电系数和低介电常数(英文)  

ELECTRIC CHARACTERISTICS OF LANGMUIR BLODGETT FERROELECTRIC POLYMERS FILM:HIGH PYROELECTRIC COEFFICIENT AND LOW DIELECTRIC CONSTANT

作　　者：刘浦锋[1] 王建禄[1] 田莉[1] 孟祥建[1] 褚君浩[1] 

机构地区：[1]中国科学院上海技术物理研究所,红外物理国家重点实验室,上海200083

出　　处：《红外与毫米波学报》2009年第6期401-404,409,共5页Journal of Infrared and Millimeter Waves

基　　金：National Natural Science Foundation of China(60221502,60777044,60771057);Natural Science Foundation of Shanghai(07JC14018,07ZR14129)

摘　　要：研究了利用朗缪尔技术(LB)生长在柔性基底上的聚偏氟乙烯和三氟乙烯的共聚物(P(VDF-TrFE))薄膜的电学性质.通过测量相对介电常数和热释电系数,发现薄膜在室温1kHz时的优值因子达到1.4 Pa-1/2.这表明利用LB技术生长的P(VDF-TrFE)薄膜是热释电探测器的优良候选材料.优值因子的提高可能来源于LB薄膜的良好结晶性和分子链在平面内的高度有序性.The relative dielectric constant ε′ and pyroelectric coefficient p of ferroelectric poly（ vinylidene fluoride-trifluoroethylene） polymers P（ VDF-TrFE ） films grown on flexible substrates by Langmuir-Blodgett （LB） technique were measured, and room temperature figure of merit was obtained as 1.4 Pa^-1/2 at 1kHz. The result implies that LB P（VDF-TrFE） copolymer films are potential materials for pyroelectric detectors. This enhancement of figure of merit could be attributed to good crystallinity and highly planar ordered molecular chains in the LB films.

关 键 词：铁电共聚物薄膜 朗缪尔薄膜 优值因子 

分 类 号：O484.42[理学—固体物理] TN252[理学—物理]