Morphological and luminescent studies on nanosized Er, Yb-Yttrium oxide up-converter prepared from different precursors

被引:57
作者
Pires, AM
Serra, OA
Davolos, MR
机构
[1] Univ Sao Paulo, Dept Quim, FFCLRP, BR-14040901 Ribeirao Preto, Brazil
[2] Univ Estadual Paulista, Inst Quim, BR-14801970 Araraquara, SP, Brazil
基金
巴西圣保罗研究基金会;
关键词
up-conversion; rare earth; phosphor; UPT; nanoparticles;
D O I
10.1016/j.jlumin.2004.09.122
中图分类号
O43 [光学];
学科分类号
070207 ; 0803 ;
摘要
In this paper, we report luminescent and morphological studies with yttrium oxide samples doped with ytterbium and erbium. The samples were prepared by the combustion method and also from different precursors: oxalate, basic carbonate and polymeric resin. All powders were identified Lis being an yttrium oxide with a C-form structure, independent of the employed precursor. From mean crystallite size measurements, it was verified that oxides prepared through the polymeric precursor and combustion methods lead to the smallest crystallite size. Particle shape and size were investigated by SEM and TEM, and showed that both the oxalate precursor and the combustion methods do not provide oxide materials of suitable shape or size, On the other hand. the basic carbonate and polymeric precursors resulted in spherically shaped particles with an average diameter of 90 and 15 run. respectively, Upon 980 run diode laser excitation, green and red emission lines were detected for all samples and were assigned to the H-2(11/2) S-4(3/2) -> I-4(15/2) and (4)Fg(9/2) -> 4I(15/12) transitions, respectively. Such transitions are characteristic for Er3+ and result from energy transfer from Yb3+ energy levels, F-2(7/2) -> F-2(5/2). A relationship between the decrease in the mean crystallite size and the enhancement in red emission was also established as well as the influence of the presence of a high percentage of Yb-3 Both factors promote ET from Yb3+ (F-2(5/2)) to Er3+ (I-4(11/2)). (c) 2004 Elsevier B.V. All rights reserved.
引用
收藏
页码:174 / 182
页数:9
相关论文
共 20 条
[1]   Growth and microstructural analysis of nanosized Y2O3 doped with rare-earths [J].
Allieri, B ;
Depero, LE ;
Marino, A ;
Sangaletti, L ;
Caporaso, L ;
Speghini, A ;
Bettinelli, M .
MATERIALS CHEMISTRY AND PHYSICS, 2000, 66 (2-3) :164-171
[2]   Nanomaterials containing rare-earth ions Tb, Eu, Er and Yb: preparation, optical properties and application potential [J].
Anh, TK ;
Minh, LQ ;
Vu, N ;
Huong, TT ;
Huong, NT ;
Barthou, C ;
Strek, W .
JOURNAL OF LUMINESCENCE, 2003, 102 :391-394
[3]  
Billmeyer F. W., 1981, Principles of colour technology
[4]   Enhancement of red emission (4F9/2→4I15/2) via upconversion in bulk and nanocrystalline cubic Y2O3:Er3+ [J].
Capobianco, JA ;
Vetrone, F ;
Boyer, JC ;
Speghini, A ;
Bettinelli, M .
JOURNAL OF PHYSICAL CHEMISTRY B, 2002, 106 (06) :1181-1187
[5]   Lateral-flow and up-converting phosphor reporters to detect single-stranded nucleic acids in a sandwich-hybridization assay [J].
Corstjens, PLAM ;
Zuiderwijk, M ;
Nilsson, M ;
Feindt, H ;
Niedbala, RS ;
Tanke, HJ .
ANALYTICAL BIOCHEMISTRY, 2003, 312 (02) :191-200
[6]  
Cullity BD, 1978, ELEMENTS XRAY DIFFRA
[7]  
daVila LD, 1997, J MATER CHEM, V7, P2113
[8]   Blue phosphor prepared by combustion method [J].
Gomes, J ;
Serra, OA ;
Pires, AM .
ECLETICA QUIMICA, 2002, 27 :187-196
[9]  
GSCHNEIDNER KA, 1994, HDB PHYS CHEM RARE E, V18, pCH125
[10]   Red, green, and blue upconversion luminescence of trivalent-rare-earth ion-doped Y2O3 nanocrystals [J].
Matsuura, D .
APPLIED PHYSICS LETTERS, 2002, 81 (24) :4526-4528