Excitation expansion in the high-energy UV region for Dy3+-doped medium-temperature molten silicate glass phosphors

作者：Tian, Chengyi; Li, Miaomiao; Li, Desheng^*; Chao, Yaojie; Pun, Edwin Yue Bun; Lin, Hai^*

来源：Journal of the American Ceramic Society, 2023, 106(2): 988-1000.

DOI：10.1111/jace.18807

• Dy3+ fluorescence
• medium-temperature melt
• multiplicative effect of sensitization
• silicate glass phosphors
• UVC excitation expansion

Medium-temperature molten Dy3+-doped silicate (LNKBAS) glass phosphors can be excited efficiently in the low-energy ultraviolet region (UVA). To this end, the addition of sensitizers Sb3+ and Ce3+ expands the validly excitable wavelength of Dy3+ from 348 to 248 nm. Fluorescence spectra demonstrate the superposition effect of the sensitization in the high-energy ultraviolet region (UVC), and the multiplicative effect of sensitization in the UVA and medium-energy ultraviolet region (UVB) for Sb3+-Ce3+-Dy3+ tri-doped LNKBAS glass phosphors. The chromaticity coordinate of LNKBASCe(0.04)Sb(0.1)Dy(1.0) is (0.2725, 0.3031) at 248 nm excitation, and the sensitization coefficient of LNKBASCe(0.04)Sb(0.2)Dy(1.0) reaches at 19.85 under 309 nm excitation. Static fluorescence photographs and dynamic fluorescence video reveal the excitation expansion and the multiplicative effect of sensitization to Dy3+ by adding sensitizers at a macroscopic level. In general, the ideal rare-earth energy conversion in medium-temperature molten silicate glass phosphors offers promising prospects for saving energy and manufacturing high-quality optoelectronic devices.

• 单位
  大连工业大学