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Optical Properties of （100） Preferred Oriented Titanium-Doped Zinc Oxide Thin Films and Their Electron Trapping Phenomena

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材料科学与工程（中英文版） 2010年第11期4卷 1-7页

作者： Leanddas Nurdiwijayanto Bambang Sunendar Purwasasmita Engineering Physics Research Groups Laboratory of Material Processing Engineering Physics Study Program Faculty of Industrial Technology Institut Teknologi Bandung West Java 40134 Indonesia

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Mixed P3HT/PCBM Organic Thin-Film Transistors： Relation between Morphology and Electrical Characteristics

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Journal of Chemistry and Chemical Engineering 2014年第5期8卷 476-481页

作者： Khairul Anuar Mohamad Afishah Alias Ismail Saad Bablu Kumar Gosh Katsuhiro Uesugi Hisashi Fukuda Nanoelectronics Device and Materials Research Group Universiti Malaysia Sabah Sabah 88400 Malaysia Muroran Institute of Technology Muroran 050-8585 Japan

The mixed P3HT (poly(3-hexylthiophene)) and [6,6]-PCBM (phenyl C 61 -butyric acid methyl ester) organic thin films were investigated for electronic structure using UV-Vis spectrophotometer and PESA (photo-electron spectroscopy in air). Furthermore, ESR (electron spin resonance) and AFM (atomic force microscopy) were used to investigate the surface morphology and molecular orientation, respectively. ESR analysis indicated the molecular orientation of the P3HT crystalline in the blend thin films, which the crystalline oriented normal to the substrate with distribution of 35o. AFM images indicated that the surface morphology of P3HT film was affected by the presence of PCBM nanoparticles. Solution-processed OTFTs (organic thin-film transistors) based on P3HT/PCBM blend thin film in a top source-drain contact structure was fabricated, and the electrical characteristics of the devices were also investigated. A unipolar property with p-channel characteristics were obtained in glove box measurement.

关键词：有机薄膜晶体管表面形态电气特性混合紫外可见分光光度计共混物薄膜 ESR分析 3-己基噻吩

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Photosensitizing Effect of Porphyrin Films as Organic Photodetector

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材料科学与工程（中英文版） 2010年第8期4卷 40-44页

作者： Agus Supriyanto Kus Kusminarto Kuwat Tnyana Roto Roto Muhamad Mat Salleh al Akrajas Ali Umar Department of Physics Sebelas Maret University Surakarta 57126 Indonesia Department of Physics Gadjah Mada University Yogyakarta 55281 Indonesia Department of Chemistry Gadjah Mada University Yogyakarta 55281 Indonesia Institute of Microengineering and Nanoelectronics （IMEN） Universiti Kebangsaan Malaysia （UKM） Bangi 43600 Selangor Malaysia

A set of organic photodetector devices arranged as indium doped tin oxide (ITO)/porphyrin/TiO2/aluminum has been fabricated and its performance has been tested in dark and under various illumination of visible light intensity from 20-100 mW/cm2. Four devices were prepared using natural porphyrin by 1, 3, 5 and 7 times of spin coating. First, porphyrin film was deposited onto indium doped tin oxide (ITO)-covered glass substrate by spin coating technique. Second, titanium dioxide (TiO2) film was deposited on top of the porphyrin film using similar technique. Porphyrin was isolated from spirulina microalgae and TiO2 nanoparticle was prepared by controlled hydrolysis technique using titanium(IV) etoxide, Ti(OC2H5)4, and potassium chloride. The films were characterized by UV-vis spectrophotometer to investigate their absorption spectra. The porphyrin film has maximum absorbance at 660 nm, which is in the red region. Then, an aluminum electrode was prepared on top of TiO2 film by electron beam evaporation technique. The resulting device shows rectification property in dark and shows photosensitizing effect under illumination. The device prepared by 3 times of spin coating of porphyrin films shows the highest current density, Jsc, of 5.76 μA/cm2 and open circuit potential, Voc, of 648 mV, respectively.

关键词：光电探测器有机薄膜光敏作用卟啉 TiO2纳米粒子紫外可见分光光度计挥发性有机化合物铟锡氧化物

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