TY - JOUR
T1 - Synthesis and photoluminescence of Ca-(Sn,Ti)-Si-O compounds
AU - Abe, Shunsuke
AU - Yamane, Hisanori
AU - Yoshida, Hisashi
N1 - Funding Information:
A part of this study was supported by a Grant-in-Aid for Science Research on Priority Areas “Nano Materials Science for Atomic Scale Modification 474” from the Ministry of Education, Culture, Sports, Science and Technology (MEXT) of Japan .
PY - 2010/4
Y1 - 2010/4
N2 - The phase relation of the compounds prepared in the CaO-SnO2-SiO2 system at 1673 K and in the CaO-TiO2-SiO2 system at 1573 K was investigated in order to explore new Ti4+-activated stannate phosphors. Solid solutions of Ca(Sn1-xTix)SiO5 and Ca3(Sn1-yTiy)Si2O9 were synthesized at x = 0-1.0 and y = 0-0.10, respectively, and their crystal structures were analyzed by powder X-ray diffraction. Photoluminescence of these solid solutions was observed in a broad range of a visible light wavelength region under ultraviolet (UV) light excitation. The peaks of the emission band of Ca(Sn0.97Ti0.03)SiO5 and Ca3(Sn0.925Ti0.075)Si2O9 were at 510 nm under excitation of 252 nm and at 534 nm under excitation of 258 nm, respectively. The absorption edges estimated by the diffuse reflectance spectra were at 300 nm (4.1 eV) for CaSnSiO5 and at 270 nm (4.6 eV) for Ca3SnSi2O9, suggesting that the excitation levels in Ca(Sn1-xTix)SiO5 were above the band gap of the host, although the levels in Ca3(Sn1-yTiy)Si2O9 were within the band gap and near the conduction band edge.
AB - The phase relation of the compounds prepared in the CaO-SnO2-SiO2 system at 1673 K and in the CaO-TiO2-SiO2 system at 1573 K was investigated in order to explore new Ti4+-activated stannate phosphors. Solid solutions of Ca(Sn1-xTix)SiO5 and Ca3(Sn1-yTiy)Si2O9 were synthesized at x = 0-1.0 and y = 0-0.10, respectively, and their crystal structures were analyzed by powder X-ray diffraction. Photoluminescence of these solid solutions was observed in a broad range of a visible light wavelength region under ultraviolet (UV) light excitation. The peaks of the emission band of Ca(Sn0.97Ti0.03)SiO5 and Ca3(Sn0.925Ti0.075)Si2O9 were at 510 nm under excitation of 252 nm and at 534 nm under excitation of 258 nm, respectively. The absorption edges estimated by the diffuse reflectance spectra were at 300 nm (4.1 eV) for CaSnSiO5 and at 270 nm (4.6 eV) for Ca3SnSi2O9, suggesting that the excitation levels in Ca(Sn1-xTix)SiO5 were above the band gap of the host, although the levels in Ca3(Sn1-yTiy)Si2O9 were within the band gap and near the conduction band edge.
KW - A. Oxides
KW - B. Chemical synthesis
KW - C. X-ray diffraction
KW - D. Luminescence
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U2 - 10.1016/j.materresbull.2010.01.001
DO - 10.1016/j.materresbull.2010.01.001
M3 - Article
AN - SCOPUS:76449093183
VL - 45
SP - 367
EP - 372
JO - Materials Research Bulletin
JF - Materials Research Bulletin
SN - 0025-5408
IS - 4
ER -