含噻吩的共聚物有序薄膜的制备及电性能测试  

PREPARATION AND CHARACTERIZATION OF ORDERED POLYMER FILMS CONTAINING THIOPHENE

作　　者：卢甜[1] 蔡雪刁[1] 郭亚男[1] 

机构地区：[1]陕西省大分子重点实验室,陕西师范大学化学化工学院,西安710062

出　　处：《离子交换与吸附》2015年第1期52-63,共12页Ion Exchange and Adsorption

基　　金：中央高校基本科研业务费GK200902008

摘　　要：通过自组装技术(SAM)在ITO基底表面化学吸附一层规整有序单分子膜,然后在催化剂存在下,通过表面引发Suzuki缩聚反应制备得到有序的聚合物薄膜,并研究了聚合条件对聚合物薄膜性能的影响。从SEM和AFM对聚合物薄膜的形貌表征结果可知,聚合物薄膜已经顺利制备于ITO玻璃表面,并且以化学键与ITO表面垂直相连。通过对不同聚合条件下聚合物薄膜的XRD测试,结果表明随着聚合时间的延长及聚合单体浓度的增加,聚合物薄膜的有序性增加。除此之外,还对聚合物薄膜进行了光电性能测试,循环伏安的测试结果表明,随着聚合时间的延长及聚合单体浓度的增加,所得聚合物薄膜的能隙也在不断增加。电流-电压(I-V)测试结果表明,聚合物薄膜的电流随着电压的增大而增大,呈线性趋势,表明聚合物薄膜与ITO是欧姆接触,有利于电荷在电极的收集。In this paper, 4-bromobenzyl phosphonic acid compound as initiator was absorbed on the surface of indium-tin oxide(ITO) by self-assembly technique. Based on this initiator, polymer film PFO-Th was formed on the modified ITO surface by Suzuki polymerization with 2,5-dibromothiophene and 2,7-bis(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-9,9-dioctyl fluorene. The properties of PFO-Th polymer film on ITO were chractered by several analytical techniques, such as contact angle measurement, UV-vis-NIR, scanning electron microscopy(SEM), atomic force microscopy(AFM), X-ray diffraction(XRD), photoluminancence and current-voltage measurement(I-V), and the polymerization conditions were optimized. SEM and AFM images showed that the morphology of polymer film was cauliflower-like. The order of polymer layer was studied by XRD and the results showed that both longer polymerization time and higher monomer concentration would increase the long-range order of polymer film. By different annealing treatment, XRD results showed that with the increasing of the annealing temperature, the long-range order of polymer film was disappeared. In addition, electrochemical performance of polymer film was measured by cyclic voltammetry(CV). The CV results showed that the band gap of polymer film was influenced by the polymerization time and monomer concentration. Current-voltage results revealed that the contact between polymer film and ITO was ohmic contact.

关 键 词：化学键连接 有序聚合物薄膜 电性能 欧姆接触 

分 类 号：O484.1[理学—固体物理]