Synthesis of green emission upconversion phosphor nanosheets (LaNb2O7) doped with Er3+ and Yb3+

被引：7
作者：
Takasugi, Soichi [1 ]
Iida, Riku [2 ]
Tomita, Koji [2 ]
Iwaoka, Michio [1 ,2 ]
Katagiri, Kiyofumi [3 ]
Osada, Minoru [4 ]
Kakihana, Masato [5 ]
机构：
[1] Tokai Univ, Grad Sch Sci & Technol, Course Sci & Technol, 4-1-1 Kitakaname, Hiratsuka, Kanagawa 2591292, Japan
[2] Tokai Univ, Sch Sci, Dept Chem, 4-1-1 Kitakaname, Hiratsuka, Kanagawa 2591292, Japan
[3] Hiroshima Univ, Grad Sch Engn, Dept Appl Chem, 1-4-1 Kagamiyama, Higashihiroshima 7398527, Japan
[4] Natl Inst Mat Sci, Int Ctr Mat Nano Architecton MANA, 1-1 Namiki, Tsukuba, Ibaraki 3050044, Japan
[5] Tohoku Univ, IMRAM, Aoba Ku, 2-1-1 Katahira, Sendai, Miyagi 9808577, Japan
来源：
JOURNAL OF LUMINESCENCE | 2016年 / 173卷
关键词：
Inorganic nanosheet; Upconversion phosphor; Soft breakdown; Energy transfer; LUMINESCENCE; NANOPARTICLES; ENHANCEMENT; EFFICIENCY; PHOTOLUMINESCENCE; NANOCRYSTALS; FLUORESCENCE; EXCITATION; RED;
D O I：
10.1016/j.jlumin.2015.12.028
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
LaNb2O7:Er3+,Yb3+ upconversion (UPC) phosphor nanosheets were prepared by exfoliating a KLaNb2O7: Er3+,Yb3+ layered compound. Highly crystalline nanosheets with a thickness and lateral size of 3.91 nm and approximately 300 nm, respectively, were obtained. The UPC emission intensity of the nanosheets was 7.6 times greater than that of mechanically milled particles (100-500 nm) of bulk KLaNb2O7:Er3+, Yb3+. The UPC emission intensities of the nanosheets dispersed in different solvents (H2O, D2O, CH3OH, CH2Cl2, and CCI4) were measured, and the intensities were observed to decrease in the order CCl4 > CH2Cl2 > D2O > CH3OH > H2O. Because of the large surface area of the nanosheets, their emission intensity was decreased depending on the solvent's vibrational energy. (C) 2016 Elsevier B.V. All rights reserved.
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页码：130 / 134
页数：5
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