发光可调单相磷光体NaGdTiO: Tm、Dy、Sm中的多能量转移

Multiple Energy Transfer in Luminescence-Tunable Single-Phased Phosphor NaGdTiO: Tm, Dy, Sm.

作者信息

Xiao Jun, Wang Cong, Min Xin, Wu Xiaowen, Liu Yangai, Huang Zhaohui, Fang Minghao

机构信息

Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes, National Laboratory of Mineral Materials, School of Materials Science and Technology, China University of Geosciences (Beijing), Beijing 100083, China.

出版信息

Nanomaterials (Basel). 2020 Jun 27;10(7):1249. doi: 10.3390/nano10071249.

DOI:10.3390/nano10071249

PMID:32605073

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC7407989/

Abstract

Advances in solid-state white-light-emitting diodes (WLEDs) necessitate the urgent development of highly efficient single-phase phosphors with tunable photoluminescence properties. Herein, the Tm, Dy, and Sm ions are incorporated into the orthorhombic NaGdTiO (NGT) phosphors, resulting in phosphors that fulfill the aforementioned requirement. The emission spectrum of Tm ions overlaps well with the adsorption spectra of both Dy and Sm ions. Under the excitation at 358 nm, the single-phase NaGdTiO: Tm, Dy, Sm phosphor exhibits tunable emission peaks in the blue, yellow, and red regions simultaneously, resulting in an intense white-light emission. The coexisting energy transfer behaviors from Tm to Dy and Sm ions and the energy transfer from Dy to Sm ions are demonstrated to be responsible for this phenomenon. The phosphors with multiple energy transfers enable the development of single-phase white-light-emitting phosphors for phosphor-converted WLEDs.

摘要

固态白光发光二极管（WLED）的进展使得迫切需要开发具有可调光致发光特性的高效单相荧光粉。在此，将Tm、Dy和Sm离子掺入正交晶系的NaGdTiO（NGT）荧光粉中，得到满足上述要求的荧光粉。Tm离子的发射光谱与Dy和Sm离子的吸收光谱有很好的重叠。在358 nm激发下，单相NaGdTiO:Tm、Dy、Sm荧光粉在蓝色、黄色和红色区域同时呈现可调发射峰，从而产生强烈的白光发射。从Tm到Dy和Sm离子的共存能量转移行为以及从Dy到Sm离子的能量转移被证明是造成这种现象的原因。具有多种能量转移的荧光粉能够开发用于荧光粉转换WLED的单相白光发射荧光粉。