News Column

Findings from Tokyo University of Science in the Area of Fullerenes Described

May 14, 2014

By a News Reporter-Staff News Editor at Electronics Newsweekly -- Current study results on Fullerenes have been published. According to news reporting from Tokyo, Japan, by VerticalNews journalists, research stated, "Here, we discuss the local photovoltaic characteristics of a structured bulk heterojunction, organic photovoltaic devices fabricated with a liquid carbazole, and a fullerene derivative based on analysis by scanning kelvin probe force microscopy (KPFM). Periodic photopolymerization induced by an interference pattern from two laser beams formed surface relief gratings (SRG) in the structured films."

The news correspondents obtained a quote from the research from the Tokyo University of Science, "The surface potential distribution in the SRGs indicates the formation of donor and acceptor spatial distribution. Under illumination, the surface potential reversibly changed because of the generation of fullerene anions and hole transport from the films to substrates, which indicates that we successfully imaged the local photovoltaic characteristics of the structured photovoltaic devices. Using atomic force microscopy, we confirmed the formation of the SRG because of the material migration to the photopolymerized region of the films, which was induced by light exposure through photomasks. The structuring technique allows for the direct fabrication and the control of donor and acceptor spatial distribution in organic photonic and electronic devices with minimized material consumption."

According to the news reporters, the research concluded: "This in situ KPFM technique is indispensable to the fabrication of nanoscale electron donor and electron acceptor spatial distribution in the devices."

For more information on this research see: In situ KPFM imaging of local photovoltaic characteristics of structured organic photovoltaic devices. Acs Applied Materials & Interfaces, 2014;6(3):1481-7. (American Chemical Society -; Acs Applied Materials & Interfaces -

Our news journalists report that additional information may be obtained by contacting S. Watanabe, Dept. of Materials Science and Technology, Tokyo University of Science , 6-3-1 Niijuku, Katsushika-ku, Tokyo 125-8585, Japan. Additional authors for this research include Y. Fukuchi, M. Fukasawa, T. Sassa, A. Kimoto, Y. Tajima, M. Uchiyama, T. Yamashita, M. Matsumoto and T. Aoyama.

Keywords for this news article include: Asia, Tokyo, Japan, Fullerenes, Electronics, Photovoltaic, Nanotechnology, Emerging Technologies.

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Source: Electronics Newsweekly

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