Abstract Nanostructure phosphors have been used for optical device and identification of individual fingerprint information. Herein, we report the orange-red emitting Eu3+ ions activated cubic Gd2Ti2O7 nanophosphors through a citrate sol-gel method. The crystal structure, morphology, optical band gap, luminescent properties, Judd-Ofelt and fingerprint were analyzed. The crystal structure of Gd2Ti2O7:Eu3+ nanophosphors confirmed the cubic phase. The morphology of nanophosphors exhibited the irregular particle shape with tens-nanometer size. The PL intensity was increased with rising Eu3+ ion concentration, indicating an optimum concentration of 0.09 mol. The emission spectra appeared an orange-red emission (5D0→7F1) with the CIE coordinates of (x = 0.615, y = 0.384). The latent fingerprints developed on various substrate have been exhibited excellent visualization and sensitivity. Based on these results, Gd2Ti2O7:Eu3+ nanophosphors are promising applications such as luminescent materials for luminescent devices and latent fingerprint.

中文翻译：

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使用 Gd 2 Ti 2 O 7 :Eu 3+ 纳米磷光体的有效指纹检测应用

摘要 纳米结构荧光粉已被用于光学器件和个体指纹信息的识别。在此，我们报告了通过柠檬酸盐溶胶-凝胶法发射橙红色 Eu3+ 离子激活立方 Gd2Ti2O7 纳米磷光体。分析了晶体结构、形貌、光学带隙、发光特性、Judd-Ofelt和指纹。Gd2Ti2O7:Eu3+ 纳米磷光体的晶体结构证实了立方相。纳米磷光体的形态表现出数十纳米大小的不规则颗粒形状。PL 强度随着 Eu3+ 离子浓度的增加而增加，表明最佳浓度为 0.09 mol。发射光谱呈现橙红色发射（5D0→7F1），CIE坐标为（x = 0.615，y = 0.384）。在各种基材上开发的潜指纹已表现出优异的可视化和灵敏度。基于这些结果，Gd2Ti2O7:Eu3+ 纳米磷光体具有广阔的应用前景，例如用于发光器件的发光材料和潜在指纹。