通过微波烧结法提高LiBaPO₄:Tm荧光粉的光致发光性能和晶体形态

Enhanced Photoluminescent Properties and Crystalline Morphology of LiBaPO₄:Tm Phosphor through Microwave Sintering Method.

作者信息

Lai Hsuan-Lin, Weng Min-Hang, Yang Ru-Yuan, Chang Shoou-Jinn

机构信息

Institute of Microelectronics, Department of Electrical Engineering, Advanced Optoelectronic Technology Center, National Cheng Kung University, Tainan 701, Taiwan.

Medical Devices and Opto-Electronics Equipment Department, Metal Industries Research and Development Center, Kaohsiung County 811, Taiwan.

出版信息

Materials (Basel). 2016 May 12;9(5):356. doi: 10.3390/ma9050356.

DOI:10.3390/ma9050356

PMID:28773483

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC5503088/

Abstract

An investigation of the photoluminescent properties and crystalline morphology of blue emitting LiBaPO4:Tm phosphors with various concentrations ( = 0.005-0.030) of Tm ions were synthesized by microwave sintering. For comparison, the LiBaPO4:Tm powders sintered at the same sintering condition but in a conventional furnace were also investigated. LiBaPO₄ without second phase was formed no matter which furnace was used. More uniform grain size distributions are obtained by microwave sintering. When the concentration of Tm ion was = 0.015, the luminescence intensity reached a maximum value, and then decreased with the increases of the Tm concentration due to concentration quenching effect. The microwave sintering significantly enhanced the emission intensity of LiBaPO4:Tm phosphors. Additionally, the d-d interaction is the key mechanism of concentration quenching for LiBaPO₄:Tm. The chromaticity (, ) for all LiBaPO₄:Tm phosphors are located at (0.16, 0.05), which will be classified as a blue region.

摘要

通过微波烧结合成了不同浓度（= 0.005 - 0.030）Tm离子的蓝色发光LiBaPO4:Tm荧光粉，并对其光致发光性能和晶体形态进行了研究。为作比较，还研究了在相同烧结条件下但在传统炉中烧结的LiBaPO4:Tm粉末。无论使用哪种炉，均形成了无第二相的LiBaPO₄。通过微波烧结获得了更均匀的晶粒尺寸分布。当Tm离子浓度= 0.015时，发光强度达到最大值，随后由于浓度猝灭效应，随着Tm浓度的增加而降低。微波烧结显著提高了LiBaPO4:Tm荧光粉的发射强度。此外，d-d相互作用是LiBaPO₄:Tm浓度猝灭的关键机制。所有LiBaPO₄:Tm荧光粉的色度（x, y）位于（0.16, 0.05），将其归类为蓝色区域。