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Structural and Optical Characteristics of CeSi 3 N 5 :Tb 3+ Nitridosilicate Phosphors
Author(s) -
Hsu ChiaHao,
Lu ChungHsin
Publication year - 2011
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.1551-2916.2011.04456.x
Subject(s) - phosphor , rietveld refinement , materials science , ion , doping , light emitting diode , ultraviolet , blue light , luminescence , energy transfer , analytical chemistry (journal) , diode , optoelectronics , chemistry , crystal structure , crystallography , organic chemistry , chromatography , molecular physics
A nitridosilicate phosphor CeSi 3 N 5 has been successfully prepared via the carbothermal reduction and nitridation method. The accurate structural parameters of single‐phased CeSi 3 N 5 were determined utilizing the Rietveld refinement process. Upon excitation at 353 nm, CeSi 3 N 5 exhibited an intense blue emission assigned to a Ce 3+ ion transition. When Tb 3+ ions were doped into the host, several Tb 3+ emission lines and a decrease in Ce 3+ emission were observed. Energy transfer from Ce 3+ to Tb 3+ resulted in a color shift from blue to greenish blue. The color‐tunable CeSi 3 N 5 :Tb 3+ phosphors to be used in ultraviolet light‐emitting diodes were developed by modulating the Tb 3+ concentrations.
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