Influence of surface coating on the upconversion emission properties of LaPO4:Yb/Tm core-shell nanorods

被引：39

作者：

Ghosh, Pushpal ^{[1
]}

de la Rosa, Elder ^{[2
]}

Oliva, Jorge ^{[2
]}

Solis, David ^{[2
]}

Kar, Arik ^{[1
]}

Patra, Amitava ^{[1
]}

机构：

[1] Indian Assoc Cultivat Sci, Dept Mat Sci, Kolkata 700032, India

[2] Ctr Invest Opt, Leon 37160, Mexico

来源：

JOURNAL OF APPLIED PHYSICS | 2009年 / 105卷 / 11期

关键词：

PHOSPHOR REPORTERS; GREEN; NANOCRYSTALS; BLUE; RED; NANOPARTICLES; LUMINESCENCE;

D O I：

10.1063/1.3143890

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

A solution based hydrothermal method is used for the preparation of LaPO4 : Yb-Tm doped and LaPO4:Yb/Tm core-shell upconverted nanorods. The morphologies, structure, formation mechanism, and upconversion emission properties of these nanocrystals are investigated in detail. Tensile strain is observed for LaPO4:Yb-Tm doped material but compressive strain is obtained for LaPO4:Yb/Tm core-shell material. Analysis suggests that the lattice strain plays an important role on the upconversion emission. Bright blue (475 nm) and red (650 nm) upconversion emissions associated to (1)G(4) -> H-3(6) and F-3(2) -> H-3(6) transitions were observed and a significant higher in upconversion emission intensity is observed in core-shell nanorods. The effective decay time calculated are 230 and 110 mu s for core-shell and doped nanorods, respectively, indicating the removal of surface defects due to surface coating. It reveals that the core-shell structure shows better upconversion emission efficiency. (C) 2009 American Institute of Physics. [DOI: 10.1063/1.3143890]

引用

页数：5

共 33 条

[1] Effects of tensile and compressive strain on the luminescence properties of AlInGaN/InGaN quantum well structures [J].

Aumer, ME ;

LeBoeuf, SF ;

Bedair, SM ;

Smith, M ;

Lin, JY ;

Jiang, HX .

APPLIED PHYSICS LETTERS, 2000, 77 (06) :821-823

[2]

BO L, 2001, J MATER SCI LETT, V20, P1071

[3] Controlled synthesis of LaPO4 and CePO4 nanorods/nanowires [J].

Cao, MH ;

Hu, CW ;

Wu, QY ;

Guo, CX ;

Qi, YJ ;

Wang, EB .

NANOTECHNOLOGY, 2005, 16 (02) :282-286

[4] Strong green upconversion emission in ZrO2:Yb3+-Ho3+ nanocrystals -: art. no. 241912 [J].

De la Rosa, E ;

Salas, P ;

Desirena, H ;

Angeles, C ;

Rodríguez, RA .

APPLIED PHYSICS LETTERS, 2005, 87 (24) :1-3

[5] Upconversion properties, of Ln3+ doped NaYF4/polymer composite fibers prepared by electrospinning [J].

Dong, Biao ;

Song, Hongwei ;

Yu, Hongquan ;

Zhang, Hui ;

Qin, Ruifei ;

Bai, Xue ;

Pan, Guohui ;

Lu, Shaozhe ;

Wang, Fang ;

Fan, Libo ;

Dai, Qilin .

JOURNAL OF PHYSICAL CHEMISTRY C, 2008, 112 (05) :1435-1440

[6] Systematic synthesis and characterization of single-crystal lanthanide orthophosphate nanowires [J].

Fang, YP ;

Xu, AW ;

Song, RQ ;

Zhang, HX ;

You, LP ;

Yu, JC ;

Liu, HQ .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2003, 125 (51) :16025-16034

[7] Enhancement of upconversion emission of LaPO4:Er@Yb core-shell nanoparticles/nanorods [J].

Ghosh, Pushpal ;

Oliva, Jorge ;

De la Rosa, Elder ;

Haldar, Krishna Kanta ;

Solis, David ;

Patra, Arnitava .

JOURNAL OF PHYSICAL CHEMISTRY C, 2008, 112 (26) :9650-9658

[8]

Ghosh P, 2007, J PHYS CHEM C, V111, P7004, DOI [10.1021/jp0711444, 10.1021/jp711444]

[9] Upconverting phosphor reporters in immunochromatographic assays [J].

Hampl, J ;

Hall, M ;

Mufti, NA ;

Yao, YMM ;

MacQueen, DB ;

Wright, WH ;

Cooper, DE .

ANALYTICAL BIOCHEMISTRY, 2001, 288 (02) :176-187

[10] Blue, green, and red upconversion emission from lanthanide-doped LuPO4 and YbPO4 nanocrystals in a transparent colloidal solution [J].

Heer, S ;

Lehmann, O ;

Haase, M ;

Güdel, HU .

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION, 2003, 42 (27) :3179-3182

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