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Synthesis and photoluminescence of new Eu3+-activated Cs2Ba(MoO4)2 red-emitting phosphors with high color purity for white LEDs
Journal of Luminescence ( IF 3.3 ) Pub Date : 2021-07-16 , DOI: 10.1016/j.jlumin.2021.118324
Fengmin Song 1, 2
Affiliation  

Novel trivalent europium activated single-phase red-emitting Cs2Ba(MoO4)2 (named as CBMO) phosphors were first prepared through high-temperature solid-state reaction. Under 396 nm excitation, the CBMO:15 mol%Eu3+ phosphor exhibited a strong red emission at 614 nm due to the typical 5D07F2 transition. The optimum concentration of Eu3+ ions was 15 mol%, and critical distance (Rc) was 14.78 Å. The Commission International del'Eclairage (CIE) chromaticity coordinates of the CBMO:0.15Eu3+ phosphors were (0.651, 0.347), which were located in the red region. The CBMO:0.15Eu3+ phosphor displayed high color purity of 99.5%. The temperature-related photoluminescence spectra and the corresponding CIE color coordinates indicated that the phosphors possessed good thermal stability and stable color property. White light-emitting diodes were fabricated with a good correlated color temperature of 4845 K and high color rendering index of 90. Therefore, the red-emitting CBMO:Eu3+ phosphors exhibited promising applications in solid-state lighting fields.



中文翻译:

用于白光 LED 的具有高色纯度的新型 Eu 3+激活 Cs 2 Ba(MoO 4 ) 2红色荧光粉的合成和光致发光

新型三价铕活化单相Cs 2 Ba(MoO 4 ) 2(命名为CBMO)荧光粉首先通过高温固相反应制备。在 396 nm 激发下,由于典型的5 D 07 F 2跃迁,CBMO:15 mol%Eu 3+磷光体在 614 nm 处表现出强烈的红色发射。Eu 3+离子的最佳浓度为15 mol%,临界距离(R c)为14.78 Å。The Commission International del'Eclairage (CIE) CBMO 色度坐标:0.15Eu 3+荧光粉为 (0.651, 0.347),位于红色区域。CBMO:0.15Eu 3+荧光粉显示出 99.5% 的高色纯度。与温度相关的光致发光光谱和相应的 CIE 颜色坐标表明荧光粉具有良好的热稳定性和稳定的颜色特性。制造的白色发光二极管具有 4845 K 的良好相关色温和 90 的高显色指数。因此,发红光的 CBMO:Eu 3+荧光粉在固态照明领域表现出良好的应用前景。

更新日期:2021-07-24
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