Synthesis and White-Light Emission of ZnO/HfO2: Eu Nanocables

Autor: Liu Lixin, Zhang Hongliang, Wang Yuan, Su Yurong, Ma Ziwei, Xie Yizhu, Zhao Haiting, Chen Changcheng, Liu Yanxia, Guo Xiaosong, Su Qing, Xie Erqing
Jazyk: angličtina
Rok vydání: 2010
Předmět:
Zdroj: Nanoscale Research Letters, Vol 5, Iss 9, Pp 1418-1423 (2010)
Druh dokumentu: article
ISSN: 1931-7573
1556-276X
DOI: 10.1007/s11671-010-9655-5
Popis: Abstract ZnO/HfO2:Eu nanocables were prepared by radio frequency sputtering with electrospun ZnO nanofibers as cores. The well-crystallized ZnO/HfO2:Eu nanocables showed a uniform intact core–shell structure, which consisted of a hexagonal ZnO core and a monoclinic HfO2 shell. The photoluminescence properties of the samples were characterized. A white-light band emission consisted of blue, green, and red emissions was observed in the nanocables. The blue and green emissions can be attributed to the zinc vacancy and oxygen vacancy defects in ZnO/HfO2:Eu nanocables, and the yellow–red emissions are derived from the inner 4f-shell transitions of corresponding Eu3+ ions in HfO2:Eu shells. Enhanced white-light emission was observed in the nanocables. The enhancement of the emission is ascribed to the structural changes after coaxial synthesis.
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