Acta Physica Sinica, Volume. 69, Issue 3, 034207-1(2020)

Tuning upconversion emissions of Ho3+ through changing excitation conditions

Wei Gao... Bo-Yang Wang, Ze-Yu Sun, Lu Gao, Chen-Xue Zhang, Qing-Yan Han and Jun Dong* |Show fewer author(s)
Figures & Tables(8)
XRD patterns of (a) NaYF4:20%Yb3+/2%Ho3+ and (b) LiYF4:20%Yb3+/2%Ho3+ microcrystals.(a) NaYF4:20.0%Yb3+/2.0%Ho3+微米晶体和(b) LiYF4:20.0%Yb3+/2.0%Ho3+微米晶体的XRD图谱
The SEM images of (a) NaYF4:20%Yb3+/2%Ho3+ and (b) LiYF4:20%Yb3+/2%Ho3+ microcrystals.(a) NaYF4:20.0%Yb3+/2.0%Ho3+微米晶体和(b) LiYF4:20.0%Yb3+/2.0%Ho3+微米晶体的SEM图谱
Schematic illustration of confocal microscopy setup.共聚焦显微光谱测试系统示意图
Upconversion emission spectra and corresponding optical micrographs of single NaYF4:20%Yb3+/2%Ho3+ and LiYF4:20%Yb3+/2%Ho3+ microcrystal under local excitation at 980 nm (100 mW/cm2).在980 nm激光激发下, 单颗NaYF4:20.0%Yb3+/2.0%Ho3+微米晶体和LiYF4:20.0%Yb3+/2.0%Ho3+微米晶体的上转换发射光谱图(激发功率为100 mW/cm2)
(a), (b) Upconversion emission spectra and corresponding optical micrographs, (c), (d) the peak area of the green and red emission intensity and corresponding R/G ratio of single NaYF4:20%Yb3+/2%Ho3+ (a), (c) and LiYF4:20%Yb3+/2%Ho3+ (b), (d) microcrystal with excitation power densities increasing from 20 mW to 100 mW.在980 nm激光激发下, 单颗粒(a) NaYF4:20.0%Yb3+/2.0%Ho3+微米晶体和(b) LiYF4:20.0%Yb3+/2.0%Ho3+微米晶的上转换发射与其激发功率的依赖关系, 插图为其对应光谱图案; (c)和(d)为对应不用激发功率下的峰面积, 插图为其随激发功率变化的红绿比图
(a), (b) UC emission spectra and corresponding optical micrographs, (c), (d) the peak area of the green and red emission intensity and corresponding R/G ratio of cluster NaYF4:20%Yb3+/2%Ho3+ (a), (c) and LiYF4:20%Yb3+/2%Ho3+ (b), (d) microcrystals with excitation power densities increasing from 20 mW to 100 mW.在980 nm激光激发下 (a) NaYF4:20.0%Yb3+/2.0%Ho3+微米粉末和(b) LiYF4:20.0%Yb3+/2.0%Ho3+微米粉末的上转换发射与其激发功率的依赖关系, 插图为其对应发光光谱图案; (c)和(d)为对应不用激发功率下的峰面积图, 插图为其随激发功率变化的红绿比图
Energy level diagrams and proposed energy transfer pathways.Ho3+离子相应的能级图及其可能跃迁机理图
(a) Downconversion emission spectra and (b) emission mechanism of single NaYF4:20%Yb3+/2%Ho3+ and LiYF4:20%Yb3+/2%Ho3+ microcrystal under laser 532 nm excitation.在532 nm激发下, 单粒NaYF4:20.0%Yb3+/2.0%Ho3+微米晶体和 LiYF4:20.0%Yb3+/2.0%Ho3+微米晶的下转换发射光谱(a)及相应跃迁机理图(b)
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Wei Gao, Bo-Yang Wang, Ze-Yu Sun, Lu Gao, Chen-Xue Zhang, Qing-Yan Han, Jun Dong. Tuning upconversion emissions of Ho3+ through changing excitation conditions [J]. Acta Physica Sinica, 2020, 69(3): 034207-1

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Received: Sep. 2, 2019

Accepted: --

Published Online: Nov. 10, 2020

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DOI:10.7498/aps.69.20191333

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