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Water—Soluble Multi—Walled Nanotube and its Film Characteristics

Chinese Physics Letters 2003年第5期20卷 753-755页

作者： FENGWei WANGXiao-Gong WANMei-Xiang FUJIIAkihiko yoshinokatsumi InstituteofPolymerScienceandEngineering DepartmentofChemicalEngineeringTsinghuaUniversityBeijing100084 CenterforMolecularSciences InstituteofChemistryChineseAcademyofSciencesBeijing100080 DepartmentofElectronicEngineering GraduateSchoolofEngineeringOsakaUniversity2-IYamada-OkaSuitaOsaka565-0871Japan

Covalent modification of multi-walled-nanotube (MWNT) surface enhanced solubility in water yields a thin transparent shining dark-colored film of soluble MWNT (s-MWNT) with a conductivity of 1.25 S/cm. Fourier transform infrared spectroscopy, scanning electron microscopy, transmission electron microscopy, and UV-vis absorption spectroscopy were used for the film characterization. The result shows that enhanced interactions between s-MWNT and water and between s-MWNTs play an important role in the increase of the solubility of the nanotubes in water and in the formation of uniform thin films.

关键词： MWNT 光谱分析扫描电子显微镜薄膜特征碳纳米管

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Effect of crystalline microstructure on the photophysical performance of polymer／perylene composite films

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Chinese Physics B 2003年第4期12卷 426-432页

作者： FengWei XuYou-Long YiWen-Hui ZhouFeng WangXiao-Gong yoshinokatsumi InstituteofPolymerScienceandEngineering DepartmentofChemicalEngineeringTsinghuaUniversityBeijing100084China SchoolofElectronicandInformationEngineering Xi'anJiaotongUniversityXi’an710049China DepartmentofElectronicEngineering GraduateSchoolofEngineeringOsakaUniversity2-1Yamade-OkaSuitaOsaka565-0871Japan

To obtain high carrier mobility, better charge injection capability, and high photovoltaic device conversion efficiency, a powerful strategy is to improve the morphology of the polymer/dye composite films. Conjugated conducting polymer (CP) thin films doped with perylene derivative (PV) of various concentrations were prepared by spin-casting method, and their morphology and photovoltaic characteristics were examined. The change in morphology and molecular reorientation occurring in CP-PV composite films upon annealing at different temperatures was investigated using scanning electron microscopy, x-ray diffraction, Fourier transform infrared and UV-vis absorption. By changing the annealing temperature, PV microcrystallines of 8-10μm in size lying parallel to the substrate surface can be *** effect improved the photovoltaic performance of ITO/CP-PV/A1 Schottky-type solar cells, which can be attributed to the formation of an electron conducting PV crystal network. Preliminary studies indicate that the morphological structure in CP-PV composite films has an important influence to their photovoltaic properties.

关键词： morphology organic photovoltaic device conducting polymer composite perylene annealing

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