Origin of the High Upconversion Green Luminescence Efficiency in β-NaYF4:2%Er3+,20%Yb3+

被引：269

作者：

Renero-Lecuna, C. ^{[1
,2
]}

Martin-Rodriguez, R. ^{[1
,2
]}

Valiente, R. ^{[1
,2
]}

Gonzalez, J. ^{[3
]}

Rodriguez, F. ^{[3
]}

Kraemer, K. W. ^{[4
]}

Guedel, H. U. ^{[4
]}

机构：

[1] Univ Cantabria, Dept Fis Aplicada, MALTA CONSOLIDER Team, E-39005 Santander, Spain

[2] ICMA CSIC, Ctr Asociado Cond Extremas, Santander 39005, Spain

[3] Univ Cantabria, Fac Ciencias, DCITIMAC, MALTA CONSOLIDER Team, E-39005 Santander, Spain

[4] Univ Bern, Dept Chem & Biochem, CH-3012 Bern, Switzerland

来源：

CHEMISTRY OF MATERIALS | 2011年 / 23卷 / 15期

关键词：

upconversion; NaYF4:Er3+; Yb3+; high pressure; luminescence; multisites; site selective spectroscopy; CRYSTAL-STRUCTURE; FLUORIDE; EMISSION; TM3+;

D O I：

10.1021/cm2004227

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：

Site-selective spectroscopy in hexagonal beta-NaYF4:Er3+,Yb3+ has revealed different environments for Er3+ ions (multisite formation). The low-temperature S-4(3/2) -> (I15/2Er3+)-I-4 green emission depends on the excitation wavelength associated with the F-4(7/2) Er3+ level. We have studied the effect of hydrostatic pressure on the green, red, and blue Er3+ emission upon NIR excitation at similar to 980 nm, in order to establish the role played by energy resonance conditions and the multiple Er3+ sites due to the disordered structure for the upconversion (UC) process (energy tuning). The variation of photoluminescence spectra and lifetimes as a function of pressure and temperature reveals that the origin of the high green UC efficiency of the beta-NaYF4:Er3+,Yb3+ compound is mainly due to the multisite distribution, and the low phonon energy of the host lattice.

引用

页码：3442 / 3448

页数：7

共 19 条

[1]

AARTS L, 2004, CHEM MATER, V16, P1

[2]

Structural and spectroscopic characterization of active sites in a family of light-emitting sodium lanthanide tetrafluorides [J].

Aebischer, A ;

Hostettler, M ;

Hauser, J ;

Krämer, K ;

Weber, T ;

Güdel, HU ;

Buergi, HB .

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION, 2006, 45 (17) :2802-2806

[3]

Blasse G., 1994, LUMINESCENT MAT, P1, DOI [10.1007/978-3-642-79017-1_1, DOI 10.1007/978-3-642-79017-1_1, 10.1007/978-3-642-79017-11, DOI 10.1007/978-3-642-79017-11]

[4]

CRYSTAL STRUCTURE OF HEXAGONAL SODIUM NEODYMIUM FLUORIDE AND RELATED COMPOUNDS [J].