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Energy transfer, luminescence properties, and thermal stability of color tunable barium pyrophosphate phosphors |
| Meng-Jiao Xu(徐梦姣)1, Su-Xia Li(李素霞)1, Chen-Chen Ji(季辰辰)2, Wan-Xia Luo(雒晚霞)1, Lu-Xiang Wang(王鲁香)1 |
1 Key Laboratory of Energy Materials Chemistry of Ministry of Education, Key Laboratory of Advanced Functional Materials of Xingjiang Uygur Autonomous Region, Institute of Applied Chemistry, Xinjiang University, Urumqi 830046, China;
2 College of Chemistry and Chemical Engineering, Xinjiang University, Urumqi 830046, China |
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Abstract A series of barium pyrophosphate Ba2P2O7 (BPO) phosphors doped with Ce3+ or Tb3+ ions is synthesized via a co-precipitation method under reducing atmosphere. The phase structures, photoluminescence (PL) properties, and thermal stabilities of the samples are characterized by using powder x-ray diffraction (PXRD) and PL spectra. The emission colors of samples can be tuned from blue (0.1544, 0.0310) to green (0.2302, 0.4229) by changing the doping concentrations of Tb3+ under ultraviolet excitation. The energy transfer mechanism between Ce3+ and Tb3+ in the BPO is dipole-dipole interaction with a critical distance of 25.86 Å and an energy transfer efficiency of about 85%, which are determined through the PL spectrum and the decay curve. Moreover, the Ce3+/Tb3+ co-doped sample has good thermal stability for temperature quenching, and the emission intensity at 423 K is maintained at 95% measured at 298 K. The above results show that the BPO:Ce3+, Tb3+ can serve as a promising candidate of green emitting phosphor for solid-state lighting.
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Received: 15 February 2020
Revised: 09 March 2020
Accepted manuscript online:
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PACS:
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33.50.-j
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(Fluorescence and phosphorescence; radiationless transitions, quenching (intersystem crossing, internal conversion))
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78.55.-m
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(Photoluminescence, properties and materials)
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65.40.-b
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(Thermal properties of crystalline solids)
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| Fund: Project supported by the Natural Science Foundation of Xinjiang Uygur Autonomous Region, China (Grant No. 2017D01C037). |
Corresponding Authors:
Lu-Xiang Wang
E-mail: wangluxiangxju@163.com
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Cite this article:
Meng-Jiao Xu(徐梦姣), Su-Xia Li(李素霞), Chen-Chen Ji(季辰辰), Wan-Xia Luo(雒晚霞), Lu-Xiang Wang(王鲁香) Energy transfer, luminescence properties, and thermal stability of color tunable barium pyrophosphate phosphors 2020 Chin. Phys. B 29 063301
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