Synthesis and Photoluminescence Properties of a Blue-Emitting La3Si8N11O4:Eu2+ Phosphor,Inorganic Chemistry

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Synthesis and Photoluminescence Properties of a Blue-Emitting La3Si8N11O4:Eu2+ Phosphor
Inorganic Chemistry ( IF 4.3 ) Pub Date : 2017-11-07 00:00:00 , DOI: 10.1021/acs.inorgchem.7b02310
Hui-Bing Xu _{1,

2} , Wei-Dong Zhuang ₁ , Le Wang ₃ , Rong-Hui Liu ₁ , Yuan-Hong Liu ₁ , Li-Hong Liu ₂ , Yujin Cho ₂ , Naoto Hirosaki ₂ , Rong-Jun Xie _{2,

4}

Affiliation

Eu²⁺-doped La₃Si₈N₁₁O₄ phosphors were synthesized by the high temperature solid-state method, and their photoluminescence properties were investigated in this work. La₃Si₈N₁₁O₄:Eu²⁺ exhibits a strong broad absorption band centered at 320 nm, spanning the spectral range of 300–600 nm due to 4f⁷ → 4f⁶5d¹ electronic transitions of Eu²⁺. The emission spectra show a broad and asymmetric band peaking at 481–513 nm depending on the Eu²⁺ concentration, and the emission color can be tuned in a broad range owing to the energy transfer between Eu²⁺ ions occupying two independent crystallographic sites. Compared to the Ce³⁺-doped La₃Si₈N₁₁O₄, the Eu²⁺-doped one shows a larger thermal quenching, predominantly owing to photoionization. Under 320 nm excitation, the internal and external quantum efficiencies are 44 and 33%, respectively.

中文翻译：

发射蓝光的La ₃ Si ₈ N ₁₁ O ₄：Eu ²⁺荧光粉的合成和光致发光性质

通过高温固态法合成了Eu ²⁺掺杂的La ₃ Si ₈ N ₁₁ O ₄荧光粉，并研究了其光致发光性能。La ₃ Si ₈ N ₁₁ O ₄：Eu ²⁺由于Eu ^2+的4f ⁷ →4f ⁶ 5d ¹电子跃迁，因此在320 nm处显示出很强的宽吸收带，跨越300-600 nm的光谱范围。发射光谱显示出在481–513 nm处有一个宽且不对称的峰峰，具体取决于Eu ²⁺由于Eu ²⁺离子之间的能量转移占据两个独立的晶体学位点，因此可以在宽范围内调整浓度和发射颜色。与掺杂Ce ^3+的La ₃ Si ₈ N ₁₁ O _4相比，掺杂Eu ^2+的合金显示出更大的热猝灭，主要是由于光电离。在320 nm激发下，内部和外部量子效率分别为44％和33％。

更新日期：2017-11-07

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