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LB法制備的P(VDF-TrFE)共聚物薄膜其光學(xué)和電學(xué)特性研究

時(shí)間:2023-05-07 04:19:34 天文地理論文 我要投稿
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LB法制備的P(VDF-TrFE)共聚物薄膜其光學(xué)和電學(xué)特性研究

摘要:運(yùn)用郎繆爾-布爾吉特法在聚酰亞胺襯底上制備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射線衍射結(jié)果表明,薄膜具有良好的結(jié)晶特性,取向?yàn)?110).運(yùn)用波長范圍為300~1300nm的橢圓偏振光譜儀對(duì)薄膜光學(xué)特性進(jìn)行了表征;運(yùn)用Cauchy模型對(duì)不同角度(θ=75°和85°)測(cè)得的Ψ和Δ數(shù)據(jù)進(jìn)行了擬合.獲得了P(VDF-TrFE)薄膜的光學(xué)參數(shù)n, k, α以及薄膜的厚度.另外對(duì)薄膜的鐵電性質(zhì)的測(cè)量,其剩余極化達(dá)到了6.3μC/cm2, 矯頑電場(chǎng)為100MV/cm.介電測(cè)量得到了薄膜兩個(gè)明顯的相變,鐵電-介電相變以及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: 王建祿  孟祥建  高艷卿  黃志明  沈宏  孫璟蘭  褚君浩 Author: WANG Jian-Lu  MENG Xiang-Jian  GAO Yan-Qing  HUANG Zhi-Ming  SHEN Hong  SUN Jing-Lan  CHU Jun-Hao 作者單位: 中國科學(xué)院上海技術(shù)物理研究所,紅外物理國家重點(diǎn)實(shí)驗(yàn)室,上海,200083 期 刊: 紅外與毫米波學(xué)報(bào)   ISTICEISCIPKU Journal: JOURNAL OF INFRARED AND MILLIMETER WAVES 年,卷(期): 2010, 29(6) 分類號(hào): PM22+1 關(guān)鍵詞: LB技術(shù)    P(VDF-TrFE)薄膜    橢圓偏振光譜    電學(xué)特性    Keywords: Langmuir-Blodgett technology    P(VDF-TrFE) films    spectroscopic ellipsometry    electric property    機(jī)標(biāo)分類號(hào): O48 TH7 機(jī)標(biāo)關(guān)鍵詞: 法制備    共聚物薄膜    薄膜光學(xué)特性    電學(xué)    特性研究    POLY    ELECTRIC PROPERTIES    LANGMUIR-BLODGETT    dielectric measurement    remnant polarization    phase transitions    Langmuir-Blodgett    refractive index    橢圓偏振光譜儀    coercive field    Cauchy    聚偏氟乙烯    different    相變    鐵電性質(zhì) 基金項(xiàng)目: National Natural Science Foundation of China,Natural Science Foundation of Shanghai LB法制備的P(VDF-TrFE)共聚物薄膜其光學(xué)和電學(xué)特性研究[期刊論文]  紅外與毫米波學(xué)報(bào) --2010, 29(6)王建祿  孟祥建  高艷卿  黃志明  沈宏  孫璟蘭  褚君浩運(yùn)用郎繆爾-布爾吉特法在聚酰亞胺襯底上制備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射線衍射結(jié)果表明,薄膜具有良好的結(jié)晶特性,取向?yàn)?110).運(yùn)用波長范圍為300~1300nm的橢圓偏振光譜儀對(duì)薄膜光學(xué)...

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