高效氟磷酸盐玻璃白光荧光体制备及发光特性

doi:10.3964/j.issn.1000-0593(2019)01-0039-06

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Abstract A series of Sn²⁺, Dy³⁺ and Sn²⁺-Dy³⁺ co-doped fluorophosphate glasses (FPGs) for white light emitting phosphor have been prepared by the melt quenching method. Under the UV light excitation, FPG: Sn²⁺ and FPG∶Dy³⁺ can obtain blue and yellow light, respectively. The emission color of FPG∶Sn²⁺-Dy³⁺ can be tuned from blue to white color by properly adjusting the concentration of Dy³⁺ ions under the excitation of 280 nm UV light, which can be attributed to the energy transfer from Sn²⁺ to Dy³⁺ ions. The energy transfer mechanism was investigated and analyzed according to the photoluminescence, lifetime decay and CIE chromaticity coordinate. In addition, the FPG∶Sn²⁺fluorophosphate glass shows the highest color rendering index of 94 and the quantum efficiency of 81.3%, and the Sn²⁺-Dy³⁺ co-doped fluorophosphate glasses show better white color coordinates. By controlling the concentration of Dy³⁺, the FPGs can present a white light with a CIE chromaticity coordinate of (0.311, 0.330), which is very close to the equal energy point. The corresponding quantum efficiency and the luminance are 56.3% and 6 706 cd·m^-2, respectively. The results of this study demonstrate that the FPGs are promising candidate for commercial white light emitting applications.

Key words：Fluorophosphate glass; White light emitting phosphor; Ions doping; Energy transfer

Received: 2017-11-12 Accepted: 2018-03-25

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O482.3

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https://www.gpxygpfx.com/EN/10.3964/j.issn.1000-0593(2019)01-0039-06 OR https://www.gpxygpfx.com/EN/Y2019/V39/I01/39