Cation substitution has been proven to be a prevailing strategy for efficiently tuning the luminescence properties of divalent europium (Eu²⁺). In this work, the isostructural Ba_0.97Y_2−xLu_xSi₃O₁₀:0.03Eu²⁺ (BYSO:Eu,xLu) and Ba_0.97Y_2−yGd_ySi₃O₁₀:0.03Eu²⁺ (BYSO:Eu,yGd) (x/y = 0.00–2.00) solid solutions with two emission bands were designed based on the existence of a second potential luminescence center in the Ba_0.97Y₂Si₃O₁₀:0.03Eu²⁺via the conventional solid-state reaction. Combined with the variation of distortion and disorder, a new model named the intensification effect of the second luminescence center was built in view of the local and average structures. All the samples exhibit a series of asymmetric and broad-band emissions covering the blue and cyan or blue and green regions, due to the increased Eu²⁺ amounts in the second coordination zone, which is attributed to the increase in distortion and disorder by varying the Gd³⁺ or Lu³⁺ content. Moreover, the thermal properties of BYSO:Eu,yGd are superior to the commercial BaMgAl₁₀O₁₇:Eu²⁺, with T_1/2 over 523 K and small reductions in emission intensity at 423 K. The present research aims to shed new light on the improvement of phosphor properties with broad-band emission and high luminous efficacy.

中文翻译：

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通过第二个发光中心的增强效应 控制Ba _0.97 Y ₂ Si ₃ O ₁₀：Eu ²⁺荧光粉的光致发光†

阳离子取代已被证明是有效调节二价euro（Eu ²⁺）发光特性的主要策略。在这项工作中，等结构Ba _0.97 Y _{2− x} Lu _x Si ₃ O ₁₀：0.03Eu ²⁺（BYSO：Eu，x Lu）和Ba _0.97 Y _{2- y} Gd _y Si ₃ O ₁₀：0.03Eu ²⁺（ BYSO：Eu，y Gd）（x / y= 0.00–2.00）通过常规的固相反应，基于Ba _0.97 Y ₂ Si ₃ O ₁₀：0.03Eu ^2+中第二个潜在发光中心的存在，设计了具有两个发射带的固溶体。结合畸变和无序的变化，针对局部和平均结构，建立了一个名为第二发光中心的增强效应的新模型。由于Eu ²⁺的增加，所有样品均表现出一系列不对称的宽带发射，覆盖了蓝色，青色或蓝色和绿色区域第二配位区中的α- ^{β-二烯基的}量是由于改变Gd ³⁺或Lu ³⁺含量而导致的畸变和无序性的增加。此外，BYSO：Eu，y Gd的热性能优于商用BaMgAl ₁₀ O ₁₇：Eu 2 ⁺，T _1/2超过523 K，发射强度在423 K时有小幅降低。宽带发射和高发光效率改善荧光粉性能的新亮点。