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Energy Transfer Enables 1.53 μm Photoluminescence from Erbium‐Doped TiO 2 Semiconductor Nanocrystals Synthesized by Ar/O 2 Radio‐Frequency Thermal Plasma
Author(s) -
Li JiGuang,
Wang Xiaohui,
Tang Chengchun,
Ishigaki Takamasa,
Tanaka Shigeru
Publication year - 2008
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1551-2916.2008.02318.x
Subject(s) - photoluminescence , coprecipitation , materials science , doping , erbium , activator (genetics) , luminescence , optoelectronics , energy transfer , nanocrystal , semiconductor , photon upconversion , plasma , photoluminescence excitation , analytical chemistry (journal) , nanotechnology , chemistry , inorganic chemistry , chemical physics , physics , biochemistry , quantum mechanics , chromatography , gene
Highly crystalline, highly luminescent nanopowders of Er 3+ ‐doped TiO 2 have been successfully synthesized via one‐step Ar/O 2 radio‐frequency thermal plasma processing. Energy transfer from the TiO 2 host to Er 3+ activators has been confirmed by combined means of UV‐vis, excitation, and photoluminescence spectroscopies. As a consequence, bright photoluminescence at ∼1.53 μm was observed from the nanopowders either by directly exciting the Er 3+ activator or by exciting the TiO 2 host lattice. A comparative study shows that the nanopowder of the same system made via coprecipitation lacks the energy transfer. The plasma‐generated nanopowders may thus find applications in optoelectronic devices.