Study of Nano-Scale Electrical Properties of Hydrogenated Microcrystalline Silicon Solar Cells by Conductive Atomic Force Microscope

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概要

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• The nano-scale current–voltage ($I$–$V$) characteristics of hydrogenated microcrystalline silicon (μc-Si:H) solar cells were studied by conductive atomic force microscope (conductive AFM) for the first time. A large local reverse (leakage) current was observed at a grain boundary, which was measured during the detection of the surface topography of a μc-Si:H solar cell in the contact mode. The grain boundary of the μc-Si:H solar cell might behave similarly to a current leakage path. In conductive AFM measurement, we found that surface topography of the μc-Si:H solar cell is composed of large convex regions. Here, a large convex region is formed by the aggregation of small grains with a diameter of ${\sim}20$ nm, which is similar to that of a silicon nanocrystallite determined by X-ray diffraction (XRD) measurement. We successfully evaluated the relationship between the nano-scale electrical properties and characteristics of grain boundaries. The obtained result indicates that the nano-scale quality of the μc-Si:H solar cell can be characterized by conductive AFM with a high experimental resolution of ${\sim}1$ nm.

• Published by the Japan Society of Applied Physics through the Institute of Pure and Applied Physicsの論文
• 2007-05-15

著者

• Nonomura Shuichi

  Environmental And Renewable Energy Systems Division Graduate School Of Engineering Gifu University

• Gotoh Tamihiro

  Department Of Applied Physics Graduate School Of Engineering Hokkaido University

• Eguchi Mototaka

  Environmental and Renewable Energy Systems Division, Graduate School of Engineering, Gifu University, Gifu 501-1193, Japan

• Shen Zhenhua

  Environmental and Renewable Energy Systems Division, Graduate School of Engineering, Gifu University, Gifu 501-1193, Japan

• Yoshida Norimitsu

  Environmental and Renewable Energy Systems Division, Graduate School of Engineering, Gifu University, Gifu 501-1193, Japan

• Itoh Takashi

  Environmental and Renewable Energy Systems Division, Graduate School of Engineering, Gifu University, Gifu 501-1193, Japan

• Yoshida Norimitsu

  Environmental and Renewable Energy Systems Division, Graduate School of Engineering, Gifu University, 1-1 Yanagido, Gifu 501-1193, Japan

• Gotoh Tamihiro

  Department of Physics, Gunma University, Maebashi 371-8510, Japan

• Nonomura Shuichi

  Environment and Renewable Energy Systems, Gifu University, Gifu 501-1193, Japan

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