Effect of Hydrogenation on ZnO Luminescence.

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  • Sekiguchi Takashi
    Institute for Materials Research, Tohoku University, Sendai 980, Japan
  • Ohashi Naoki
    Department of Inorganic Materials, Faculty of Engineering, Tokyo Institute of Technology, 2–12–1 O–okayama, Meguro–ku, Tokyo 152, Japan
  • Terada Yoshihiro
    Department of Inorganic Materials, Faculty of Engineering, Tokyo Institute of Technology, 2–12–1 O–okayama, Meguro–ku, Tokyo 152, Japan

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  • Effect of Hydrogenation on ZnO Luminesc

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The effect of hydrogenation on the luminescence property of ZnO crystal was investigated by means of cathodoluminescence (CL). It was found that hydrogen plasma treatment strongly passivates the green emission and enhances the band edge luminescence. The band edge luminescence of ZnO crystals in the as-grown state does not show any significant temperature dependence. However, that of hydrogenated ZnO crystals shows strong temperature dependence and the intensity increases significantly at low temperatures. At 30 K, the number of luminescent photons exceeds several tenths of generated electron-hole pairs.

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