Preparation and luminescence properties of orange-red Ba3Y4O9:Sm3+ phosphors |
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Authors: | Jiayu Li Ran Pang Zhan Yu Liyan Liu Haiyan Wu Huimin Li Lihong Jiang Su Zhang Jing Feng Chengyu Li |
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Affiliation: | 1. State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China;2. School of Chemistry and Chemical Engineering, Shenyang Normal University, Shenyang 110034, China;3. University of Chinese Academy of Sciences, Beijing 100049, China |
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Abstract: | A novel orange-red emitting Ba3Y4O9:Sm3+ phosphors were prepared by a high temperature solid-state reaction in air. X-ray diffraction (XRD), photoluminescence spectra, fluorescence decay and temperature-dependent emission spectra were utilized to characterize the structure and luminescence properties. The results show that the excitation spectrum includes a series of linear peaks at 350, 367, 382, 410, 424, 445, 470 and 495 nm, respectively. Under 410 nm excitation, the emission peaks were located at 574 nm (4G5/2—6H5/2), 608 nm (4G5/2—6H7/2), 659 nm (4G5/2—6H9/2) and 722 nm (4G5/2—6H11/2), respectively. The concentration quenching occurs when x equals 0.08 for Ba3Y4–xO9:xSm3+ phosphor and its mechanism is ascribed to the dipole–dipole interaction. The chromaticity coordinates of Ba3Y3.92O9:0.08Sm3+ phosphor are in the orange-red region. The temperature-dependent study shows that this phosphor has excellent luminescence thermal-stability. And the luminescence intensity of Ba3Y3.92O9:0.08Sm3+ phosphor at 473 K only declines by about 25.75% of its initial intensity. The experimental data indicate that Ba3Y4O9:Sm3+ phosphor may be promising as an orange-red emitting phosphor for white light emitting diodes. |
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Keywords: | Orange-red phosphors Rare earths Photoluminescence |
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