Defect‐Mediated Photoluminescence Dynamics of Eu 3+ ‐Doped TiO 2  Nanocrystals Revealed at the Single‐Particle or Single‐Aggregate Level | Zendy

Tachikawa Takashi | Zendy; Ishigaki Takamasa | Zendy; Li JiGuang | Zendy; Fujitsuka Mamoru | Zendy; Majima Tetsuro | Zendy

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Defect‐Mediated Photoluminescence Dynamics of Eu 3+ ‐Doped TiO 2 Nanocrystals Revealed at the Single‐Particle or Single‐Aggregate Level

Author(s) -

Tachikawa Takashi,

Ishigaki Takamasa,

Li JiGuang,

Fujitsuka Mamoru,

Majima Tetsuro

Publication year - 2008

Publication title -

angewandte chemie international edition

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 5.831

H-Index - 550

eISSN - 1521-3773

pISSN - 1433-7851

DOI - 10.1002/anie.200800528

Subject(s) - photoluminescence , exciton , doping , nanocrystal , nanoparticle , particle (ecology) , spectroscopy , excitation , argon , ion , chemistry , nanotechnology , chemical physics , materials science , analytical chemistry (journal) , atomic physics , physics , optoelectronics , condensed matter physics , organic chemistry , quantum mechanics , oceanography , geology

Single‐particle fluorescence spectroscopy was used to investigate defect‐mediated photoluminescence (PL) dynamics of undoped and Eu 3+ ‐doped TiO 2 nanoparticles, and revealed that free excitons in the photoirradiated TiO 2 host can excite both interior and surface Eu 3+ ions, while trapped excitons at the surface only excite the latter. The picture shows PL images of TiO 2 :Eu 3+ nanoparticles during laser excitation in air and argon atmospheres.

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