Guner Tugrul, Kus Anilcan, Ozcan Mehmet, Genc Aziz, Sahin Hasan, Demir Mustafa M
Department of Materials Science and Engineering, Izmir Institute of Technology, Izmir, Turkey.
Department of Photonics, Izmir Institute of Technology, Izmir, Turkey.
Beilstein J Nanotechnol. 2019 Jun 7;10:1200-1210. doi: 10.3762/bjnano.10.119. eCollection 2019.
Phosphors can serve as color conversion layers to generate white light with varying optical features, including color rendering index (CRI), high correlated color temperature (CCT), and luminous efficacy. However, they are typically produced under harsh synthesis conditions such as high temperature, high pressure, and/or by employing a large amount of solvent. In this work, a facile, water-based, rapid method has been proposed to fabricate lanthanide-doped hydroxide-based phosphors. In this sense, sub-micrometer-sized Y(OH):Eu particles (as red phosphor) were synthesized in water at ambient conditions in ≤60 min reaction time. The doping ratio was controlled from 2.5-20 mol %. Additionally, first principle calculations were performed on Y(OH):Eu to understand the preferable doping scenario and its optoelectronic properties. As an application, these fabricated red phosphors were integrated into a PDMS/YAG:Ce composite and used to generate white light. The resulting white light showed a remarkable improvement (≈24%) in terms of luminous efficiency, a slight reduction of CCT (from 3900 to 3600 K), and an unchanged CRI (≈60) as the amount of Y(OH):Eu was increased.
荧光粉可作为颜色转换层，以产生具有不同光学特性的白光，包括显色指数（CRI）、高相关色温（CCT）和发光效率。然而，它们通常是在高温、高压等苛刻的合成条件下生产的，和/或使用大量溶剂。在这项工作中，提出了一种简便、水基、快速的方法来制备镧系掺杂的氢氧化物基荧光粉。从这个意义上说，在≤60分钟的反应时间内，在环境条件下于水中合成了亚微米尺寸的Y(OH):Eu颗粒（作为红色荧光粉）。掺杂比例控制在2.5 - 20摩尔%。此外，对Y(OH):Eu进行了第一性原理计算，以了解优选的掺杂情况及其光电性质。作为一种应用，将这些制备的红色荧光粉集成到PDMS/YAG:Ce复合材料中，并用于产生白光。随着Y(OH):Eu含量的增加，所得白光在发光效率方面有显著提高（约24%），CCT略有降低（从3900 K降至3600 K），CRI保持不变（约60）。
