Excitation Processes of Photoluminescence and Origin of Absorption Peak Shift in ZnO Porous Films Modified with Eu Ions

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概要

• 論文の詳細を見る

• Porous ZnO films modified with Eu3+ ions were fabricated by electrodeposition and their optical properties were investigated. The porous ZnO films were cathodically electrodeposited in a bath containing eosin Y (EY) dye molecules and the surface of ZnO was modified with Eu3+ ions. Photoluminescence (PL) peaks due to the intra-4f transitions of Eu3+ ions were clearly observed. From the PL excitation (PLE) spectra, it was found that the Eu3+ ions are mainly excited from photoexcited ligands, though another excitation process remains unidentified. Furthermore, the absorption peak energy of the porous ZnO observed in PLE as well as diffuse reflection spectra was 90 meV higher than the A exciton energy of bulk crystals. This energy shift was attributed to the opposing influence of the Burstein–Moss and many-body effects.

• 2010-03-25

著者

• Yamamoto Aishi

  Graduate School Of Materials Science Nara Institute Of Science And Technology

• Hisao Yanagi

  Graduate School of Materials Science, Nara Institute of Science and Technology, Ikoma, Nara 630-0192, Japan

• Tsukasa Yoshida

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

• Aishi Yamamoto

  Graduate School of Materials Science, Nara Institute of Science and Technology, Ikoma, Nara 630-0192, Japan

• Noritake Masashi

  Graduate School of Materials Science, Nara Institute of Science and Technology, Ikoma, Nara 630-0192, Japan

• Harumoto Yoshiyuki

  Graduate School of Materials Science, Nara Institute of Science and Technology, Ikoma, Nara 630-0192, Japan

• Kazuho Mizuta

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

• Masashi Noritake

  Graduate School of Materials Science, Nara Institute of Science and Technology, Ikoma, Nara 630-0192, Japan

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