| CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES |
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Luminescent characteristics of Tm3+/Tb3+/Eu3+ tri-doped Na5Y9F32 single crystals for white emission with high thermal stability |
| Lizhi Fang(方立志)1, Xiong Zhou(周雄)1, Zhiwei Zhao(赵志伟)2, Biao Zheng(郑标)3, Haiping Xia(夏海平)1,†, Jun Wang(王军)3,‡, Hongwei Song(宋宏伟)4, and Baojiu Chen(陈宝玖)5 |
1 Key Laboratory of Photo-electronic Materials, Ningbo University, Ningbo 315211, China;
2 Taizhou Special Equipment Inspection and Research Institute, Taizhou 318000, China;
3 Fujian Provincial Key Laboratory of Functional Marine Sensing Materials, Center for Advanced Marine Sensing Materials and Smart Sensors, Minjiang University, Fuzhou 350108, China;
4 State Key Laboratory on Integrated Optoelectronics, College of Electronic Science and Engineering and College of Physics, Jilin University, Changchun 130012, China;
5 Department of Physics, Dalian Maritime University, Dalian 116026, China |
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Abstract By using an improved Bridgman method, 0.3 mol% Tm$^{3+}/0.6$ mol% Tb$^{3+}/y$ mol% Eu$^{3+}$ ($y = 0$, 0.4, 0.6, 0.8) doped Na$_{5}$Y$_{9}$F$_{32}$ single crystals were prepared. The x-ray diffraction, excitation spectra, emission spectra and fluorescence decay curves were used to explore the crystal structure and optical performance of the obtained samples. When excited by 362 nm light, the cool white emission was realized by Na$_{5}$Y$_{9}$F$_{32}$ single crystal triply-doped with 0.3 mol% Tm$^{3+}/0.6$ mol% Tb$^{3+}/0.8$ mol% Eu$^{3+}$, in which the Commission Internationale de l'Eclairage (CIE) chromaticity coordinate was (0.2995, 0.3298) and the correlated color temperature (CCT) was 6586 K. The integrated normalized emission intensity of the tri-doped single crystal at 448 K could keep 62% of that at 298 K. The internal quantum yield (QY) was calculated to be $\sim 15.16$% by integrating spheres. These results suggested that the single crystals tri-doped with Tm$^{3+}$, Tb$^{3+}$ and Eu$^{3+}$ ions have a promising potential application for white light-emitting diodes (w-LEDs).
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Received: 09 January 2022
Revised: 15 March 2022
Accepted manuscript online: 28 March 2022
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PACS:
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78.60.Lc
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(Optically stimulated luminescence)
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78.66.Sq
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(Composite materials)
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| Fund: Project supported by the National Natural Science Foundation of China (Grant No. 62275133), the Natural Science Foundation of Zhejiang Province of China (Grant No. LY22E020002), the Natural Science Foundation of Ningbo (Grant Nos. 2021J077 and 202003N4099), and K.C. Wong Magna Fund in Ningbo University. |
Corresponding Authors:
Haiping Xia, Jun Wang
E-mail: hpxcm@nbu.edu.cn;wjnaf@163.com
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Cite this article:
Lizhi Fang(方立志), Xiong Zhou(周雄), Zhiwei Zhao(赵志伟), Biao Zheng(郑标), Haiping Xia(夏海平), Jun Wang(王军), Hongwei Song(宋宏伟), and Baojiu Chen(陈宝玖) Luminescent characteristics of Tm3+/Tb3+/Eu3+ tri-doped Na5Y9F32 single crystals for white emission with high thermal stability 2022 Chin. Phys. B 31 127802
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