LB法制备的P(VDF-TrFE)共聚物薄膜其光学和电学特性研究

时间:2021-08-03 15:07:08 天文地理论文 我要投稿
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LB法制备的P(VDF-TrFE)共聚物薄膜其光学和电学特性研究

摘要:运用郎缪尔-布尔吉特法在聚酰亚胺衬底上制备聚偏氟乙烯及三氟乙烯(P(VDF-TrFE))共聚物薄膜.不同厚度薄膜的X射线衍射结果表明,薄膜具有良好的结晶特性,取向为(110).运用波长范围为300~1300nm的椭圆偏振光谱仪对薄膜光学特性进行了表征;运用Cauchy模型对不同角度(θ=75°和85°)测得的Ψ和Δ数据进行了拟合.获得了P(VDF-TrFE)薄膜的'光学参数n, k, α以及薄膜的厚度.另外对薄膜的铁电性质的测量,其剩余极化达到了6.3μC/cm2, 矫顽电场为100MV/cm.介电测量得到了薄膜两个明显的相变,铁电-介电相变以及β弛豫.Abstract:Poly (vinylidene fluoride-trifluoroethylene) (P(VDF-TrFE)) thin films were deposited on polyimide substrate using horizontal Langmuir-Blodgett(LB) technology. X-ray diffractions indicate that the films have good crystallinity with (110) preferential orientation for films with different thickness. The optical dispersion of the films were measured by variable-angle spectroscopic ellipsometry. The data Ψ and Δ at multiple incident angels (θ=75° and 85°) were fitted using the Cauchy model. The refractive index, extinction coefficient,absorption coefficient and thickness of each film were obtained. The ferroelectric of the films were studied. The remnant polarization is up to 6.3μC/cm2. The coercive field is 100MV/cm. The dielectric measurement for the film shows two distinctive phase transitions, ferroelectric-paraelectric phase transition and β relaxation. 作者: 王建禄  孟祥建  高艳卿  黄志明  沈宏  孙璟兰  褚君浩 Author: WANG Jian-Lu  MENG Xiang-Jian  GAO Yan-Qing  HUANG Zhi-Ming  SHEN Hong  SUN Jing-Lan  CHU Jun-Hao 作者单位: 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 期 刊: 红外与毫米波学报   ISTICEISCIPKU Journal: JOURNAL OF INFRARED AND MILLIMETER WAVES 年,卷(期): 2010, 29(6) 分类号: PM22+1 关键词: LB技术    P(VDF-TrFE)薄膜    椭圆偏振光谱    电学特性    Keywords: Langmuir-Blodgett technology    P(VDF-TrFE) films    spectroscopic ellipsometry    electric property    机标分类号: O48 TH7 机标关键词: 法制备    共聚物薄膜    薄膜光学特性    电学    特性研究    POLY    ELECTRIC PROPERTIES    LANGMUIR-BLODGETT    dielectric measurement    remnant polarization    phase transitions    Langmuir-Blodgett    refractive index    椭圆偏振光谱仪    coercive field    Cauchy    聚偏氟乙烯    different    相变    铁电性质 基金项目: National Natural Science Foundation of China,Natural Science Foundation of Shanghai LB法制备的P(VDF-TrFE)共聚物薄膜其光学和电学特性研究[期刊论文]  红外与毫米波学报 --2010, 29(6)王建禄  孟祥建  高艳卿  黄志明  沈宏  孙璟兰  褚君浩运用郎缪尔-布尔吉特法在聚酰亚胺衬底上制备聚偏氟乙烯及三氟乙烯(P(VDF-TrFE))共聚物薄膜.不同厚度薄膜的X射线衍射结果表明,薄膜具有良好的结晶特性,取向为(110).运用波长范围为300~1300nm的椭圆偏振光谱仪对薄膜光学...

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