Rare Earth Distribution in NaRF4: Effect on Up-Conversion Intensity

被引：5

作者：

Brito, H. F. ^{[1
]}

Holsa, J. ^{[1
,2
,3
]}

Laamanen, T. ^{[2
,3
]}

Laihinen, T. ^{[2
]}

Lastusaari, M. ^{[2
,3
]}

Rodrigues, L. C. V. ^{[1
,2
]}

Pihlgren, L. ^{[2
,4
]}

Soukka, T. ^{[5
]}

机构：

[1] Univ Sao Paulo, Inst Quim, Sao Paulo, Brazil

[2] Univ Turku, Dept Chem, FI-20014 Turku, Finland

[3] Turku Univ, Ctr Mat & Surfaces MatSurf, Turku, Finland

[4] GSMR, Turku, Finland

[5] Univ Turku, Dept Biochem, FI-20014 Turku, Finland

来源：

POWDER DIFFRACTION | 2013年 / 28卷

基金：

芬兰科学院;

关键词：

X-ray powder diffraction; up-conversion; ytterbium; terbium; NaYF4;

D O I：

10.1017/S0885715613001164

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The NaYF4:Yb3+,Tb3+ (x(Yb): 0.20, x(Tb): 0.04) materials were prepared by the co-precipitation method. The as-prepared material was washed with and without water and thereafter annealed at 500 degrees C. This resulted in materials with moderate (with water) and very high (without water) up-conversion luminescence intensity. The structural details causing the differences in luminescence intensity were investigated at room temperature with X-ray powder diffraction and Rietveld analyses. All materials crystallized in the hexagonal form (P6(3)/m, No. 176, Z: 1.5) with a composition very close to stoichimetric. The local structural details revealed microstrains in the rare earth sublattice that were relaxed for the material with very high up-conversion luminescence intensity thus decreasing energy losses and enhancing up-conversion.

引用

页码：S41 / S50

页数：10

共 14 条

[1] Use of near-infrared radiation for oxygenic photosynthesis via photon up-conversion [J].