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Photoluminescence of green nanophosphors Sr2MgSi2O7 doped with Tb3+ under 374-nm excitation |
| Bo-Shi Mu(牟博石)1,2, Yi Zhang(张熠)1, Qing-Feng Bian(边庆丰)1, Cheng-Ren Li(李成仁)1,†, Zhi-Chao Li(李志超)1, Yun-Ting Chu(褚云婷)1, Feng Zhao(赵峰)1, and Jing-Chang Sun(孙景昌)1 |
1 School of Physics and Electronic Technology, Liaoning Normal University, Dalian 116029, China;
2 School of Science, Qiqihar University, Qiqihar 161006, China |
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Abstract A series of Sr2MgSi2O7:Tb3+ nanophosphors is prepared using a high-temperature solid-state reaction. The x-ray diffraction patterns show that the crystal structure of the sample is not significantly affected by Tb3+ ions. However, the images of the scanning electron microscope illustrate that the average size of nanoparticles becomes larger with the increase of Tb3+ concentration. Unlike earlier investigations on down-conversion emission of Tb3+ ion excited by deep ultraviolet light, in this work, the photoluminescence characteristics of Sr2MgSi2O7 nanophosphors doped with different Tb3+ concentrations are analyzed under 374-nm excitations. The intense green emission at 545 nm is observed at an optimal doping concentration of 1.6 mol%. The main reason for the concentration quenching is due to the electric dipole-electric dipole interaction among Tb3+ ions.
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Received: 06 March 2021
Revised: 19 April 2021
Accepted manuscript online: 27 April 2021
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PACS:
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32.30.Jc
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(Visible and ultraviolet spectra)
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61.82.Rx
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(Nanocrystalline materials)
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| Fund: Project supported by the National Natural Science Foundation of China (Grant No. 11004092) and the Foundation of Science and Technology Department of Liaoning Province, China (Grant No. 201602455). |
Corresponding Authors:
Cheng-Ren Li
E-mail: lnnulicr@aliyun.com
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Cite this article:
Bo-Shi Mu(牟博石), Yi Zhang(张熠), Qing-Feng Bian(边庆丰), Cheng-Ren Li(李成仁), Zhi-Chao Li(李志超), Yun-Ting Chu(褚云婷), Feng Zhao(赵峰), and Jing-Chang Sun(孙景昌) Photoluminescence of green nanophosphors Sr2MgSi2O7 doped with Tb3+ under 374-nm excitation 2021 Chin. Phys. B 30 123201
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