TY - JOUR
T1 - Growth of Ce-doped Ba3Gd(BO3)3 and Sr 3Gd(BO3)3 single crystals by micro-pulling-down method and analysis of luminescence properties
AU - Simura, Rayko
AU - Yagi, Tatsushi
AU - Sugiyama, Kazumasa
AU - Yanagida, Takayuki
AU - Yoshikawa, Akira
N1 - Funding Information:
We are grateful to Mr. Y. Murakami from Tohoku University for his assistance in the EPMA measurements. A part of this research was carried out under a cooperative program of the ARCMG-IMR, Tohoku University, and partly supported by KAKENHI ( 2376003 ). The authors wish to express their gratitude to Dr. H. Nitani, IMSS, KEK, for his help with the XANES measurements (Proposal no. 2010G117). RS was partly supported by the Skills-Improvement-Subsidy of Tohoku Leading Women's Jump Up Project of Tohoku University .
PY - 2013/1/1
Y1 - 2013/1/1
N2 - Ce-doped double borates Ba3Gd(BO3)3 and Sr3Gd(BO3)3 (Ce:BGB and Ce:SGB, respectively) were grown by the micro-pulling-down method, and the luminescence properties of the crystals were investigated and compared with those of Ce-doped H-Ba 3Y(BO3)3(Ce:H-BYB) crystals grown by the same method. Transmittance measurements showed the wavelength of absorption band was around 380 nm for all the samples. Emission bands corresponding to the 5d→4f transition of Ce3+ were observed at around 425 nm for Ce:BGB and Ce:SGB and at 435 nm for Ce:H-BYB. The photoluminescence decay times of Ce:BGB, Ce:SGB, and Ce:BYB were 29.5 ns, 35.2 ns, and 26.8 ns, respectively. The emission spectra obtained by excitation of 241Am (an α-emitter) revealed that the host luminescence was dominant (at around 315 nm) in BGB and SGB and that a very low-intensity Ce3+ 5d→4f luminescence peak appeared at around 430 nm. The relative light yield strength observed under 241Am excitation was corresponding to <100 and ∼270 photons/neutron for Ce:BGB and Ce:SGB, respectively, and these values were lower than that of Ce:H-BYB (∼400 photons/neutron).
AB - Ce-doped double borates Ba3Gd(BO3)3 and Sr3Gd(BO3)3 (Ce:BGB and Ce:SGB, respectively) were grown by the micro-pulling-down method, and the luminescence properties of the crystals were investigated and compared with those of Ce-doped H-Ba 3Y(BO3)3(Ce:H-BYB) crystals grown by the same method. Transmittance measurements showed the wavelength of absorption band was around 380 nm for all the samples. Emission bands corresponding to the 5d→4f transition of Ce3+ were observed at around 425 nm for Ce:BGB and Ce:SGB and at 435 nm for Ce:H-BYB. The photoluminescence decay times of Ce:BGB, Ce:SGB, and Ce:BYB were 29.5 ns, 35.2 ns, and 26.8 ns, respectively. The emission spectra obtained by excitation of 241Am (an α-emitter) revealed that the host luminescence was dominant (at around 315 nm) in BGB and SGB and that a very low-intensity Ce3+ 5d→4f luminescence peak appeared at around 430 nm. The relative light yield strength observed under 241Am excitation was corresponding to <100 and ∼270 photons/neutron for Ce:BGB and Ce:SGB, respectively, and these values were lower than that of Ce:H-BYB (∼400 photons/neutron).
KW - A2. Micro-pulling-down method
KW - B1. BaGd(BO)
KW - B1. BaY(BO)
KW - B1. Double borate
KW - B1. SrGd(BO)
KW - B2. Ce 5d→4f luminescence
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U2 - 10.1016/j.jcrysgro.2011.11.086
DO - 10.1016/j.jcrysgro.2011.11.086
M3 - Article
AN - SCOPUS:84870294228
VL - 362
SP - 145
EP - 148
JO - Journal of Crystal Growth
JF - Journal of Crystal Growth
SN - 0022-0248
IS - 1
ER -