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Microstructure and photoluminescence of Ge-doped mesoporous silica

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Abstract

Nanostructured Ge-doped mesoporous silica powder and thin film were prepared with a cetyltrimethylammonium bromide self-assembled template to investigate the doping effects on the structure and optical properties of mesoporous silica. The X-ray diffraction, transmission electron microscopy and photoluminescence (PL) results suggest that the Ge-doped mesoporous silica with Ge/Si molar ratio of 0.01 was characterized by the strongest PL intensity without phase separation. Worm-like Ge-doped porous silica with specific area up to 987 m2/g could be obtained in this study, in which some Si atoms were replaced by Ge atoms according to the X-ray photoelectron spectroscopy analyses. The PL intensity of mesoporous silica could be increased by germanium-induced oxygen-related defects, but for the samples with Ge/Si molar ratios larger than 0.01, the PL intensity decreased due to the phase separation of germanium oxide.

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Acknowledgments

This work was financially supported by the National Science Council of Taiwan, the Republic of China, grant No. NSC 100-2221-E-006-122-MY3, which is gratefully acknowledged.

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Authors and Affiliations

  1. Department of Materials Science and Engineering, National Cheng Kung University, Tainan, Taiwan

    Ding-Liang Chiang & Min-Hsiung Hon

  2. Research Center for Energy Technology and Strategy, National Cheng Kung University, Tainan, Taiwan

    Min-Hsiung Hon

  3. Department of Mechanical Engineering, National Pingtung University of Science and Technology, Pingtung, Taiwan

    Lay Gaik Teoh

  4. Department of Materials Science and Engineering, National United University, Miaoli, Taiwan

    Jiann Shieh

Authors
  1. Ding-Liang Chiang
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  2. Min-Hsiung Hon
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  3. Lay Gaik Teoh
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  4. Jiann Shieh
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Correspondence to Jiann Shieh.

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Chiang, DL., Hon, MH., Teoh, L.G. et al. Microstructure and photoluminescence of Ge-doped mesoporous silica. J Sol-Gel Sci Technol 66, 242–247 (2013). https://doi.org/10.1007/s10971-013-3000-2

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  • DOI: https://doi.org/10.1007/s10971-013-3000-2

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