The β‐sialon:Eu²⁺ phosphor particles were successfully coated by TiO₂ nanoparticles via the sol‐gel method. The TiO₂‐coated β‐sialon:Eu²⁺ phosphor had a significantly improved photoluminescence (PL) performance under the 365 nm excitation, due to the localized surface plasmon resonance (LSPR) at the interface between the TiO₂ coating layer and phosphor surface. The emission intensity of the TiO₂‐coated β‐sialon:Eu²⁺ prepared with the titanium (IV) tetrabutoxide (Ti(OC₄H₉)₄, TTBO):H₂O = 1:0.5 volume ratio was dramatically increased by ~24%. When the preparation temperature was 500°C, it was responsible for superior PL intensity by considering the important domination factors of higher anatase content and spherical particle shape of the TiO₂ coating layer to the LSPR effect. The coating around the phosphor surface by the TiO₂ nanoparticles would be an effective technique to improve the PL efficiency of phosphor for the application in the white light‐emitting diodes (LEDs), by utilizing the LSPR effect of the semiconductor coating layer, instead of conventional metal plasmonic materials.

中文翻译：

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通过TiO2表面涂层显着改善了绿色发光的β-sialon：Eu2 +荧光粉的光致发光

β-sialon：Eu ²⁺荧光粉颗粒通过溶胶-凝胶法成功地被TiO ₂纳米颗粒包覆。TiO ₂涂层的β-sialon：Eu ²⁺荧光粉在365 nm激发下具有显着改善的光致发光（PL）性能，这是因为TiO ₂涂层和荧光粉表面之间的界面处存在局部表面等离子体共振（LSPR）。用四丁醇钛（IV（Ti（OC ₄ H ₉）₄，TTBO）：H ₂制备的）涂覆TiO ₂的β-sialon：Eu ²⁺的发射强度O = 1：0.5体积比显着增加了〜24％。当制备温度为500°C时，通过考虑较高的锐钛矿含量和TiO ₂涂层的球形颗粒形状对LSPR效应的重要控制因素，可以使PL强度更高。TiO ₂纳米粒子在荧光粉表面周围的涂层将是一种有效的技术，通过利用半导体涂层的LSPR效应代替在白色发光二极管（LED）中的应用，可以提高荧光粉的PL效率。常规金属等离子体材料。