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Nanosheet‐Based Microspheres of Eu 3+ ‐doped ZnO with Efficient Energy Transfer from ZnO to Eu 3+ at Room Temperature
Author(s) -
Zeng X.,
Yuan J.,
Wang Z.,
Zhang L.
Publication year - 2007
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.200602396
Subject(s) - nanosheet , materials science , microsphere , doping , pyrolysis , conduction band , energy transfer , nanotechnology , chemical engineering , optoelectronics , engineering physics , physics , quantum mechanics , engineering , electron
Nanosheet‐based microspheres of ZnO:Eu (see figure) are fabricated via pyrolysis of Zn 5 (OH) 6 (CO 3 ) 2 hierarchical microspheres. Efficient ZnO→Eu 3+ energy transfer is observed, which is attributed to surface defects at the nonpolar [11?00] surface of a ZnO nanosheet that couples with Eu 3+ and stabilizes the Eu 2+ trap level just below the conduction band of ZnO.