一种LED用红色荧光粉BaZn2(BO3)2∶Eu3+的合成与发光性能研究

通过高温固相法制得双峰可调节本征半导体发光BaZn2(BO3)2∶Eu3+荧光粉，此类荧光粉在300~400 nm的紫外波段有很强的吸收。在375 nm的紫外光激发下，该荧光粉产生了两个宽带的发射峰，分别位于550 nm和615 nm处。并且，在395 nm的紫光激发下，荧光粉会由于Eu3+离子的5D0→7F2电偶极跃迁产生一个位于615 nm的强宽发射峰，这表明Eu3+离子占据了反演对称中心的位置，取代了BaZn2(BO3)2中部分的Ba2+离子。当Eu3+的摩尔分数达到10%时，发生浓度猝灭。在不同浓度的Eu3+离子的掺杂下，BaZn2(BO3)2∶ Eu3+荧光粉的发光从黄色延伸到红色，实现了荧光粉的色度可调。

Abstract

A two-peak adjustable semiconductor luminescent material BaZn2(BO3)2∶xEu3+ phosphor was prepared by high temperature solid state method. The phosphor has a strong absorption in the ultraviolet band in the range of 300 to 400 nm. With the excitation of 375 nm, this phosphor exhibits two broad emission bands, peaked at 550 and 615 nm. And under the excitation of 393 nm, this phosphor exhibits a strong broad emission band, peaked at 615 nm due to the 5D0→7F2 electric dipole transition of Eu3+, which indicates that Eu3+ occupies an anti-inversion symmetry, and partly replaces the divalent Ba2+ in the BaZn2(BO3)2 lattice. When the mole fraction of Eu3+ reaches 10%, the concentration quenching occurs. The color hue of BaZn2(BO3)2∶xEu3+ phosphors under different doped concentrations of Eu3+ ions can be tuned from yellow to red.

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吴程潇, 邓德刚, 阮枫萍, 余华, 徐时清. 一种LED用红色荧光粉BaZn₂(BO₃)₂∶Eu³⁺的合成与发光性能研究[J]. 发光学报, 2018, 39(4): 457. WU Cheng-xiao, DENG De-gang, RUAN Feng-ping, YU Hua, XU Shi-qing. Synthesis and Luminescence Properties of Red Phosphor BaZn₂(BO₃)₂∶Eu³⁺ for Light-emitting Diode[J]. Chinese Journal of Luminescence, 2018, 39(4): 457.

一种LED用红色荧光粉BaZn₂(BO₃)₂∶Eu³⁺的合成与发光性能研究

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