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Please use this identifier to cite or link to this item: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/26479

Title: Highly Efficient Cathodoluminescence of Nanophosphors by Solvothermal Route
Authors: Horng-Yi Chang;Hsien-Der Lee;Mei-Lun Wu;Li-Jiaun Lin
Contributors: 國立臺灣海洋大學:輪機工程學系
Keywords: SrTiO3 nanophosphor;Cathodoluminescence;Hydrothermal;Solvothermal;Nucleation seeds
Date: 2010-06
Issue Date: 2011-10-20T08:36:01Z
Publisher: Journal of Luminescence
Abstract: Abstract:The low voltage excited nano-size of SrTiO3: Pr, Al red cathodoluminescent phosphors is successfully prepared by hydrothermal and solvothermal processes. Crystal size does not have obvious growth after post-annealing process under the nucleation seeds control. The nanophosphors synthesized by the solvothermal process have a more stoichiometric and cubic SrTiO3 structure than the hydrothermal ones. SrTiO3: Pr, Al nanophosphors synthesized by the solvothermal process with 200 °C/24 h possess a cubic crystal size of about 50 nm. The red cathodoluminescent intensity of 200 °C/24 h-solvothermal phosphors is nine times that of the 250 °C/24 h-hydrothermal ones after 1000 °C/1 h heat treatment. The stoichiometric SrTiO3: Pr, Al nanophosphors by solvothermal preparation need less amounts of Pr activator and Al dopant than when using conventional solid-oxide preparation and can achieve high cathodoluminescence at a wavelength of 615 nm exciting at a low accelerating voltage of 1 kV. The solvothermal process combined with the post-annealing process to synthesize nanophosphors distributes and excites the activator and the dopant more homogeneously and efficiently in the host structure of SrTiO3, thus enhancing luminescence.
Relation: 130(6), pp.969–975
URI: http://ntour.ntou.edu.tw/handle/987654321/26479
Appears in Collections:[輪機工程學系] 期刊論文

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