发射可调荧光粉 CaLa(PO):Re (Re = Ce, Eu) 的占位研究与发光性能

Site Occupancy Studies and Luminescence Properties of Emission Tunable Phosphors CaLa(PO):Re (Re = Ce, Eu).

机构信息

School of Chemistry and Chemical Engineering , Lingnan Normal University , Zhanjiang 524048 , China.

出版信息

Inorg Chem. 2019 Feb 4;58(3):1877-1885. doi: 10.1021/acs.inorgchem.8b02597. Epub 2019 Jan 18.

DOI:10.1021/acs.inorgchem.8b02597

Abstract

The structure, site occupancies, and photoluminescence (PL) properties of Ce- or Eu-doped CaLa(PO) phosphors were investigated in this work. The powder X-ray diffraction (XRD) data and Rietveld refinement results showed that the phosphors are pure phases. The vacuum ultraviolet-ultraviolet-visible (VUV-UV-vis) spectra and decay curves confirmed that the Ce and Eu ions in CaLa(PO) occupied two crystal sites. Additionally, the tunable color can be obtained by adjusting doping concentration and altering temperature. The fabricated w-LED lamp based on Eu-doped CaLa(PO) phosphor gave properties with a color rendering index (CRI) of 85.26, CIE chromaticity coordinates of (0.358, 0.307), and color temperature (CCT) of 4329 K.

摘要

本工作研究了 Ce 或 Eu 掺杂的 CaLa(PO) 荧光粉的结构、占据位置和光致发光（PL）性质。粉末 X 射线衍射（XRD）数据和 Rietveld 精修结果表明，荧光粉为纯相。真空紫外-紫外-可见光（VUV-UV-vis）光谱和衰减曲线证实 Ce 和 Eu 离子在 CaLa(PO) 中占据两个晶位。此外，通过调整掺杂浓度和改变温度可以获得可调颜色。基于 Eu 掺杂 CaLa(PO) 荧光粉制备的 w-LED 灯具有显色指数（CRI）为 85.26、CIE 色度坐标为（0.358,0.307）和色温（CCT）为 4329 K 的性能。