Luminescent properties of Eu3+-Tb3+-doped SiO2-SnO2-based nano-glass-ceramics prepared by sol-gel method

被引：22

作者：

del-Castillo, J. ^{[1
]}

Yanes, A. C. ^{[1
]}

Velazquez, J. J. ^{[2
]}

Mendez-Ramos, J. ^{[2
]}

Rodriguez, V. D. ^{[2
]}

机构：

[1] Univ La Laguna, Dept Fis Basica, E-38206 Tenerife, Spain

[2] Univ La Laguna, Dept Fis Fundamental & Expt Elect & Sistemas, E-38206 Tenerife, Spain

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2009年 / 473卷 / 1-2期

关键词：

Nanostructured materials; Sol-gel processes; Optical spectroscopy; Energy transfer; SNO2; NANOCRYSTALS; XEROGELS; METAL;

D O I：

10.1016/j.jallcom.2008.06.048

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070305 [高分子化学与物理];

摘要：

Transparent nano-glass-ceramics of composition 95SiO(2)-5SnO(2) mol%, single doped with 0.4 mol% of Tb3+ and co-doped with 0.4 mol% of Eu3+ and Tb3+ have been obtained by thermal treatment of precursor sol-gel glasses. The segregated SnO2 nanocrystals, precipitated in the insulator SiO2 glass matrix during heat treatment, constitute a wide band gap quantum-dot system with mean radius of nanocrystals around 2.2-2.8 nm, comparable to the bulk exciton Bohr radius. A fraction of the rare earth ions is incorporated to the SnO2 nanocrystals and can be excited by energy transfer from the semiconductor host. The efficiency of this energy transfer process is strongly dependent on the nanocrystal radius in the case of the Tb3+ ions, whereas the dependence is not appreciable in the case of Eu3+ ions. These results can be explained taking into account the variations of the overlap of the SnO2 broad visible emission due to oxygen vacancies with the rare earth excitation spectra. (c) 2008 Elsevier B.V. All rights reserved

引用

页码：571 / 575

页数：5

共 17 条

[1]

Energy transfer to erbium ions from wide-band-gap SnO2 nanocrystals in silica [J].

Brovelli, S ;

Chiodini, A ;

Lauria, A ;

Meinardi, F ;

Paleari, A .

PHYSICAL REVIEW B, 2006, 73 (07)

[2]

BRUS E, 1983, J CHEM PHYS, V79, P11

[3]

ELECTRON ELECTRON AND ELECTRON-HOLE INTERACTIONS IN SMALL SEMICONDUCTOR CRYSTALLITES - THE SIZE DEPENDENCE OF THE LOWEST EXCITED ELECTRONIC STATE [J].

BRUS, LE .

JOURNAL OF CHEMICAL PHYSICS, 1984, 80 (09) :4403-4409

[4]

SnO2 nanocrystals in SiO2:: A wide-band-gap quantum-dot system [J].

Chiodini, N ;

Paleari, A ;

Di Martino, D ;

Spinolo, G .

APPLIED PHYSICS LETTERS, 2002, 81 (09) :1702-1704

[5]

Luminescent properties of transparent nanostructured Eu3+ doped SnO2-SiO2 glass-ceramics prepared by the sol-gel method [J].

Del Castillo, J ;

Rodríguez, VD ;

Yanes, AC ;

Méndez-Ramos, J ;

Torres, ME .

NANOTECHNOLOGY, 2005, 16 (05) :S300-S303

[6]

Luminescence of nanostructured SnO2-SiO2 glass-ceramics prepared by sol-gel method [J].

del-Castillo, J. ;

Yanes, A. C. ;

Mendez-Ramos, J. ;

Rodriguez, V. D. .

JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY, 2008, 8 (04) :2143-2146

[7]

Energy transfer from the host to Er3+ dopants in semiconductor SnO2 nanocrystals segregated in sol-gel silica glasses [J].

del-Castillo, Javier ;

Rodriguez, V. D. ;

Yanes, A. C. ;

Mendez-Ramos, J. .

JOURNAL OF NANOPARTICLE RESEARCH, 2008, 10 (03) :499-506

[8]

SMALL-PARTICLE RESEARCH - PHYSICOCHEMICAL PROPERTIES OF EXTREMELY SMALL COLLOIDAL METAL AND SEMICONDUCTOR PARTICLES [J].

HENGLEIN, A .

CHEMICAL REVIEWS, 1989, 89 (08) :1861-1873

[9]

Photoluminescence in quantum-confined SnO2 nanocrystals:: Evidence of free exciton decay [J].

Lee, EJH ;

Ribeiro, C ;

Giraldi, TR ;

Longo, E ;

Leite, ER ;

Varela, JA .

APPLIED PHYSICS LETTERS, 2004, 84 (10) :1745-1747

[10]

PECULIARITIES AND APPLICATION PERSPECTIVES OF METAL-ION IMPLANTS IN GLASSES [J].

MAZZOLDI, P ;

ARNOLD, GW ;

BATTAGLIN, G ;

BERTONCELLO, R ;

GONELLA, F .

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS, 1994, 91 (1-4) :478-492

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