Abstract In the present paper, various fluxes assisted Eu3+ doped SrTiO3 nanophosphors were prepared via a solution combustion route. Among all fluxes, NH4F was found to be an appropriate one, which can reduce the forming temperature, improve morphology and enhance the luminescence intensity by two-fold to that of without added flux. Hence, NH4F assisted with SrTiO3:Eu3+ nanophosphor was utilized to fabricate a handy ink-free photoluminescent writable chalk to write information on many complex surfaces at any time and any place. The written original information cannot be visualized upon normal light illumination; however, it was readable under UV 254 nm light. However, ink-free nanophosphor-polymer matrix was fabricated via relief printing mode as an anti-counterfeiting label. The developed templates exhibit brighter uniform fluorescence due to effective hydrogen bonding between functional groups of nanophosphors and polyvinyl alcohol. The obtained results clearly showed that the optimized nanophosphor can be used as a dual mode ink-free fluorescence label for security applications.

中文翻译：

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助焊剂支持的 SrTiO3:Eu3+ 荧光粉的制备：双模式无墨数据安全应用的新前景

摘要 在本文中，通过溶液燃烧途径制备了多种助熔剂辅助的 Eu3+ 掺杂 SrTiO3 纳米荧光粉。在所有助焊剂中，发现NH4F是一种合适的助焊剂，它可以降低成型温度，改善形貌，使发光强度比不添加助焊剂时提高两倍。因此，NH4F 与 SrTiO3:Eu3+ 纳米磷一起被用来制造一种方便的无墨水光致发光可书写粉笔，可以随时随地在许多复杂的表面上书写信息。书写的原始信息在正常光照下无法显现；然而，它在 254 nm 紫外光下是可读的。然而，无墨纳米磷聚合物基质是通过凸版印刷模式制造的，作为防伪标签。由于纳米磷光体和聚乙烯醇的官能团之间存在有效的氢键，所开发的模板表现出更明亮的均匀荧光。获得的结果清楚地表明，优化的纳米荧光粉可用作安全应用的双模式无墨荧光标签。