有序组装超薄膜热释电性能的优化研究  

Optimization of pyroelectric properties in ultrathin organized molecular films

作　　者：马世红[1] 严媚[1] 李淑红[2] 陆兴泽[2] 王根水[3] 诸君浩[3] 王文澄[2] 

机构地区：[1]先进光子学材料与器件国家重点实验室,复旦大学物理学系,上海200433 [2]先进光子学材料与器件国家重点实验室,复旦大学光科学与工程系,上海200433 [3]红外物理国家重点实验室,中国科学院上海技术物理研究所,上海200083

出　　处：《物理学报》2003年第1期197-201,共5页Acta Physica Sinica

基　　金：国家自然科学基金 (批准号 :1970 40 0 4;10 2 740 14 );上海市教育发展基金和上海市教育委员会"曙光计划"项目;教育部留学回国人员基金;中科院红外物理国家重点实验室资助的课题 ~~

摘　　要：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 5 8μCm- 2 K- 1 ;在频率为 1kHz— 10 0kHz的范围内 ,其εr和tanδ的数值分别为 2 .34— 1.96和 0 .0 8— 0 .0 4 .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 .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 -2 K -1 at 300K.The dielectric properties have been measured and used to determine the figures of merit in thermal devices. Relative permittivity ε r and dielectric loss values tan δ 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.

关 键 词：优化 LB膜 有序组装超薄膜 热释电效应 介电性能 

分 类 号：O484.4[理学—固体物理]