Synthesis, color-tunable emission, thermal stability, luminescence and energy transfer of Sm 3+ and Eu 3+ single-doped M 3 Tb(BO 3 ) 3 (M = Sr and Ba) phosphors
A series of new tunable emission phosphors of Sm 3+ and Eu 3+ single-doped M 3 Tb(BO 3 ) 3 (M = Sr and Ba) phosphors were synthesized by the solid-state reaction. Crystallization behavior and structure, reflectance spectral properties, luminescence properties, energy transfer, lifetimes, temperature...
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| Published in | CrystEngComm Vol. 18; no. 36; pp. 6934 - 6947 |
|---|---|
| Main Authors | , , , , , , , , |
| Format | Journal Article |
| Language | English |
| Published |
2016
|
| Online Access | Get full text |
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| Summary: | A series of new tunable emission phosphors of Sm
3+
and Eu
3+
single-doped M
3
Tb(BO
3
)
3
(M = Sr and Ba) phosphors were synthesized by the solid-state reaction. Crystallization behavior and structure, reflectance spectral properties, luminescence properties, energy transfer, lifetimes, temperature-dependent luminescence properties and CIE chromaticity coordinate of M
3
Tb(BO
3
)
3
:Ln
3+
(M = Sr and Ba, Ln = Sm and Eu) were systematically investigated. M
3
Tb(BO
3
)
3
(M = Sr and Ba) crystallizes in a rhombohedral cell with space group R3̄ by Rietveld structure refinement of the obtained phosphors with the standard data of Ba
3
Dy(BO
3
)
3
. Sr
3
Tb(BO
3
)
3
and Ba
3
Tb(BO
3
)
3
emit yellowish-green emission with the main peak around 555 and 550 nm, respectively, which originates from the
5
D
4
→
7
F
4
transition of Tb
3+
, and M
3
Tb(BO
3
)
3
:Ln
3+
(Ln = Sm and Eu) phosphors show intense yellowish-green, yellow, orange and red emission with increasing Ln
3+
concentration under 274 and 286 nm excitation. The orange-red/red emissions show peak maxima at 613 nm (Sr
3
Tb(BO
3
)
3
:Sm
3+
), 627 nm (Sr
3
Tb(BO
3
)
3
:Eu
3+
), 607 nm (Ba
3
Tb(BO
3
)
3
:Sm
3+
) and 625 nm (Ba
3
Tb(BO
3
)
3
:Eu
3+
), and are due to the efficient energy transfer of Tb
3+
–Sm
3+
and Tb
3+
–Eu
3+
. The temperature-dependent luminescence properties of M
3
Tb(BO
3
)
3
:Ln
3+
are characterised by good thermal stabilities up to 150 °C, up to 72.8%. However, due to the defect in the host of the Sr
3
Tb
0.99
(BO
3
)
3
:0.01Sm
3+
phosphor, an amazing and interesting phenomenon can be observed that the emission intensity is enhanced constantly with increasing temperature. |
|---|---|
| ISSN: | 1466-8033 1466-8033 |
| DOI: | 10.1039/C6CE01400C |