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Photoluminescence and time-resolved luminescence spectroscopy of novel NaBa4(BO3)3:Tb3+ phosphor
被引:26
作者:
Zhang, Xinmin
[1
]
Zhang, Zhi
[1
]
Seo, Hyo Jin
[2
]
机构:
[1] Cent S Univ Forestry & Technol, Sch Mat Sci & Engn, Changsha 410004, Hunan, Peoples R China
[2] Pukyong Natl Univ, Dept Phys, Pusan 608737, South Korea
关键词:
Phosphors;
Solid state reactions;
Optical properties;
Luminescence;
Time-resolved optical spectroscopies;
BORATES MM'(4)(BO3)(3) M;
GREEN-EMITTING PHOSPHOR;
CROSS-RELAXATION;
RELATIVE PROPERTIES;
ENERGY-TRANSFER;
TB3+;
EU3+;
UV;
NANOPHOSPHORS;
MECHANISM;
D O I:
10.1016/j.jallcom.2011.01.195
中图分类号:
O64 [物理化学(理论化学)、化学物理学];
学科分类号:
070304 ;
081704 ;
摘要:
This paper reports the photoluminescence (PL) properties of Tb3+ in NaBa4(BO3)(3), as well as the time-resolved luminescence properties. The PL excitation spectrum exhibits intense f -> f transition absorption; the PL emission spectrum shows the strongest D-5(4) -> 7F5 emission at 540 nm. The relative intensity of D-5(3) emission is much weaker than that of D-5(4) emission even in the samples with lower Tb3+ concentration. The D-5(3). D-5(4) cross-relaxation produces a marked increase in the D-5(3) decay rate with increasing Tb3+ concentrations and introduces a non-exponential component into the initial part of the decay. The dipole-dipole interaction is found to be responsible for the cross-relaxation. The decay curves of D-5(4) -> 7F5 transition exhibit an initial rise phenomenon. The two exponential fitting indicates that the initial slow rise is attributed to the D-5(3) -> D-5(4) cross-relaxation process. (C) 2011 Elsevier B. V. All rights reserved.
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页码:4875 / 4877
页数:3
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