Luminescence properties, energy transfer and thermal stability of white emitting phosphor Sr(PO):Ce/Tb/Mn for white LEDs

• Published in: RSC advances Vol. 12; no. 1; pp. 42 - 428
• Main Authors: Ma, Yingshan, Fu, Suyue, Zhao, Yichang, Liu, Chunjiao, Li, Leipeng, Wang, Zhijun, Suo, Hao, Wang, Dawei, Zhao, Jinxin, Li, Panlai
• Format: Journal Article
• Published: 21-12-2021
• ISSN: 2046-2069
• DOI: 10.1039/d1ra08062h

A series of Sr
3
(PO
4
)
2
:Ce
3+
/Mn
2+
/Tb
3+
phosphors were synthesized by a high temperature solid phase method. After introducing Ce
3+
as sensitizer in Sr
3
(PO
4
)
2
:Ce
3+
/Mn
2+
, the efficient energy transfer from Ce
3+
to Mn
2+
was observed and analyzed in detail, and Sr
3
(PO
4
)
2
:Ce
3+
/Mn
2+
was demonstrated to be color tunable, changing from blue to orange red. In addition, Tb
3+
ion, which mainly emits green light, was further added into the Sr
3
(PO
4
)
2
:Ce
3+
/Mn
2+
. Due to the addition of this green emission, the white emitting phosphors with good quality were obtained. At the same time, the energy transfer mechanisms among Ce
3+
, Tb
3+
and Mn
2+
ions were also analyzed in detail. The results show that Sr
3
(PO
4
)
2
:Ce
3+
/Mn
2+
/Tb
3+
is a promising candidate for white light emitting diodes.
The tunable emission phosphor was realized by the energy transfer.