Optical and Structural Properties of Eu[sup 2+]-doped (Sr[sub 1−x]Ba[sub x])[sub 2]SiO[sub 4] phosphors
Authors:
- 1 January 2005
- journal article
- Published by The Electrochemical Society in Journal of the Electrochemical Society
- Vol. 152 (9) , H135-H137
Abstract
Europium (Eu2+)(Eu2+) -doped alkaline earth orthosilicates (Sr1−xBax)2SiO4:Eu2+(Sr1−xBax)2SiO4:Eu2+ , are studied as a phosphor for color-tunable white-light-emitting diode. With an increase of Ba ions in (Sr1−xBax)2SiO4:Eu2+(Sr1−xBax)2SiO4:Eu2+ , the lattice constants increase, and the emission bands shift to higher energy in a systematic way. This blueshift behavior can be clarified by crystal field strength. Also, the lattice vibration energies from Raman spectra decrease with an increase of Ba ions in (Sr1−xBax)2SiO4:Eu2+(Sr1−xBax)2SiO4:Eu2+ . The emission-quenching temperature dependence of the lattice vibration frequency is investigated in terms of a well-known configurational coordinate diagram.Keywords
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