Spectroscopic investigations on Er3+/Yb3+-doped oxyfluoride glass ceramics containing YOF nanocrystals |
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Authors: | ZHENG Fei XU Shiqing ZHAO Shilong DENG Degang HUA Youjie WANG Huanping |
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Affiliation: | (College of Materials Science and Engineering, China Jiliang University, Hangzhou 310018, China) |
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Abstract: | Spectroscopic properties of Er3+/Yb3+-doped transparent oxyfluoride borosilicate glass ceramics containing YOF nanocrystals were systematically investigated. X-ray diffraction (XRD) confirmed the formation of YOF nanocrystals in the glassy matrix. Based on the Judd-Ofelt theory, the intensity parameters Ωi (i=2, 4, 6), spontaneous emission probability, radiative lifetime, radiative quantum efficiency and the effective emission bandwidth were investigated. The upconversion luminescence intensity of Er3+ ions in the glass ceramics increased significantly with the increasing crystallization temperature. The transition mechanisms of the green and red upconversion luminescence were ascribed to a two-photon process, and the blue upconversion luminescence was a three-photon absorption process. |
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Keywords: | oxyfluoride glass ceramics Er3+/Yb3+ codoped spectroscopic properties rare earths |
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