Abstract Novel and highly effective red emitting phosphor Pr3+ doped (1-11 mol %) Lanthanum Oxyfluoride (LaOF) nanoparticles were synthesized as part of solid state white light emitting diodes by a low temperature solution combustion method using Centellaasiatica leaf extract as a reducing agent. The structural and optical characterization of the nanophosphor is described. The nanophosphor shows a prominent emission in the red region. The concentration dependence of the Pr3+ luminescence is investigated. The Photoluminescence analysis, CIE and CCT coordinates suggest that phosphors derived from LaOF: Pr3+might a probable application for white LEDs. In addition, the effect of cation substitution on the strength of luminescence is further elucidated. The Judd-Ofelt theory was used to analyze various radiative properties. Finger Prints dusted by LaOF: Pr3+(5 mol %) NPs exhibit clear and bright images under UV 254 nm light and are helpful for identification of individuals.

中文翻译：

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积雪草介导的溶液燃烧合成新型 Pr3+ 掺杂氟氧化镧，用于潜在指纹和防伪应用的显示和可视化

摘要 使用积雪草叶提取物作为还原剂，通过低温溶液燃烧法合成了新型高效的红色荧光粉 Pr3+ 掺杂 (1-11 mol%) 氟氧化镧 (LaOF) 纳米粒子，作为固态白光发光二极管的一部分。描述了纳米磷光体的结构和光学特性。纳米磷光体在红色区域显示出突出的发射。研究了 Pr3+ 发光的浓度依赖性。光致发光分析、CIE 和 CCT 坐标表明源自 LaOF: Pr3+ 的磷光体可能适用于白光 LED。此外，进一步阐明了阳离子取代对发光强度的影响。Judd-Ofelt 理论用于分析各种辐射特性。被 LaOF 沾染的指纹：