摘要：過去幾十年內，由于鐵電材料具有非常好的介電性、壓電性和熱釋電性等多種不同的性質，以及其在動力學隨機存儲器、傳感器、電容器和換能器等方面具有廣闊的應用前景而吸引著越來越多的關注，由于其應用特性，如生長便利、費用低、性能穩定、易于與硅工藝整合等，是最被廣泛研究的聚合物鐵電材料。

    本文研究了濃度對P(VDF-TrFE)共聚物和P(VDF-TrFE-CFE)三聚物性能的影響。實驗采用垂直提拉的方法制備鐵電聚合物薄膜，采用的儀器是垂直提拉涂膜機，分別作出2%和4%的不同濃度的樣品。利用量子效率測試系統研究薄膜的反射譜和透射譜，我們得出結論：P(VDF-TrFE)共聚物的透射譜分析得出濃度高的透射率高，而它的反射譜分析得出濃度高的反射率低。對P(VDF-TrFE-CFE)三聚物不同厚度條件下的透射譜和反射譜分析得出相同厚度的條件下，濃度高的反射率低。

關鍵詞：P(VDF-TrFE)，P(VDF-TrFE-CFE)，垂直提拉涂膜機

Abstract:The past few years, ferroelectric materials have very good dielectric, piezoelectric, pyroelectric properties, and many kinds of different properties. They have a wide application prospects in the dynamic random access memory, sensors and capacitor transducer and attract more and more attention, because of its application features, such as growth convenience, low cost, stable performance, easy to integrate with silicon technology, etc, they are the most widely researched ferroelectric polymer materials.

   This paper studies the effect of concentration on the reflection spectrum and the transmission spectrum in P(VDF-TrFE) and P(VDF-TrFE-CFE) copolymer thin films. The experiment was completed by a vertical tiras coating machine and the concentrations of the thin films are 2% and 4% for P(VDF-TrFE) and P(VDF-TrFE-CFE) copolymer thin films respectively. By the quantum efficiency test of the thin films, we draw the conclusions:with the increase of the concentration the transmissivity increases for the P(VDF-TrEE) thin filmwith the same layers . While with the increase of the concentration the reflectivity  increases for the P(VDF-TrEE) thin filmwith the layers decreases. For  P(VDF-TrEE-CFE),with the increase of the concentration the transmissivity increases for the P(VDF-TrEE-CFE) thin film with the same layers .in the meantime with the increase of the concentration the reflectivity  increases for the P(VDF-TrEE-CFE) thin filmwith the layers increases.

Keywords: P (VDF-TrFE), P (VDF-TrFE-CFE)vertical tiras coating machine