聚乙二醇修饰对P3HT/ZnO复合膜形貌和光学性能的影响  

Effect of polyethylene glycol modification on the morphology and optical property of P3HT/ZnO composite film

作　　者：郝亚敏[1,2] 杨维佳[1,2] 闫翎鹏 杨永珍[1,2] 刘旭光[1,3] 许并社[1,2] 

机构地区：[1]太原理工大学新材料界面科学与工程教育部重点实验室,太原030024 [2]太原理工大学新材料工程技术研究中心,太原030024 [3]太原理工大学化学化工学院,太原030024

出　　处：《功能材料》2015年第20期20057-20062,共6页Journal of Functional Materials

基　　金：国家自然科学基金资助项目(21176169);国家国际科技合作专项资助项目(2012DFR50460);山西省科技创新重点团队资助项目(2012041011);山西省回国留学人员科研资助项目(2012-038);山西省研究生优秀创新资助项目(20143010)

摘　　要：首先选用聚乙二醇(PEG)对水热法合成的粒径约200nm的ZnO球进行表面钝化,考察了PEG分子量、用量对ZnO薄膜形貌及光学性能的影响和PEG的能级结构;然后采用聚3-己基噻吩(P3HT)和最优参数PEG修饰前、后的ZnO纳米球共混旋涂来制备P3HT/ZnO复合膜,利用原子力显微镜、紫外-可见分光光度计、荧光光谱分析仪考察PEG钝化修饰对复合膜形貌及光学性能的影响。结果表明,采用相对分子质量为6 000、用量为5%(质量分数)的PEG修饰ZnO时,制备的ZnO薄膜均一性最好;PEG修饰的ZnO与P3HT具有良好的能级匹配性;P3HT与PEG修饰后的ZnO形成的复合膜表面规整且缺陷较少,而且在可见光区的光吸收作用增强,荧光猝灭现象加剧,表明PEG修饰增加了ZnO和P3HT的接触面积,促进了界面间的电荷转移。ZnO nanoparticles with average size about 200 nm synthesized by one-step hydrothermal method were firstly modified by surfactant polyethylene glycol(PEG).The effects of PEG molecular weight and dosage on the surface morphology and optical properties of ZnO film were discussed.The energy level structure of PEG was researched.Then poly(3-hexylthiophene)(P3HT)was adopted to prepare the composite films with pure ZnO and ZnO modified by PEG,respectively.The effects of PEG passivation on the morphology and optical property of the composite films were characterized by atomic force microscope,ultraviolet-visible spectrophotometer and photoluminescence spectra.The results showed that ZnO film modified by PEG with molecular weight 6000 and dosage of 5wt% had regular morphology;the energy level of P3 HT matched well with that of ZnO modified by PEG;compared with P3HT/ZnO composite film,P3HT/PEG/ZnO composite film would have more regular surface,less surface defects,better absorptivity and higher fluorescence quenching,which indicated that PEG modification increased the contact area between ZnO and P3 HT as well as promoted the charge transfer between their interface.

关 键 词：聚乙二醇 ZNO 复合膜 光学性能 

分 类 号：TB333[一般工业技术—材料科学与工程]