ScVO<sub>4</sub>∶Eu<sup>3+</sup>红色荧光粉的制备及发光性能

doi:10.3964/j.issn.1000-0593(2020)10-3077-04

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Abstract ScVO₄∶Eu³⁺ red phosphor was prepared using-high temperature solid-state method. The phase, morphology and luminescence properties of the samples were characterized by X-ray powder diffraction (XRD), scanning electron microscope (SEM) and photoluminescence spectrum (PL). The results showed that: the synthesized ScVO₄∶Eu³⁺ red phosphor was a tetragonal system with near-spherical surface. In the excitation spectrum, the excitation peaks at 382 nm, 395 and 466 nm were attributed to ⁷F₀→⁵L₇, ⁷F₀→⁵L₆ and ⁷F₀→⁵D₂ transitions, respectively. In the emission spectrum, the emission peaks at 598, 622 and 710 nm correspond to ⁵D₀→⁷F₁, ⁵D₀→⁷F₂ and ⁵D₀→⁷F₄ transitions of Eu³⁺. When Eu³⁺ has a doping ratio of 7% and is calcined at 1 200 ℃ for 3 h, ScVO₄∶Eu³⁺ red phosphor has a CIE color coordinate of (0.671 6, 0.327 3) and fluorescence lifetime of 0.521 ms, which is a kind of high-efficiency red phosphor expected to be used in white LED.

Key words：White LEDs; ScVO₄∶Eu³⁺; Phosphor; Optical performance

Received: 2019-10-26 Accepted: 2020-02-21

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https://www.gpxygpfx.com/EN/10.3964/j.issn.1000-0593(2020)10-3077-04 OR https://www.gpxygpfx.com/EN/Y2020/V40/I10/3077