Blue upconversion emission of Tm3+-Yb3+ in ZrO2 nanocrystals:: Role of Yb3+ ions

被引：96

作者：

Patra, A ^{[1
]}

Saha, S

Alencar, MARC

Rakov, N

Maciel, GS

机构：

[1] Cent Glass & Ceram Res Inst, Sol Gel Div, Kolkata 700032, W Bengal, India

[2] Univ Fed Pernambuco, Dept Fis, BR-50670901 Recife, PE, Brazil

来源：

CHEMICAL PHYSICS LETTERS | 2005年 / 407卷 / 4-6期

关键词：

D O I：

10.1016/j.cplett.2005.03.135

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The effect of Yb3+ ions on the blue upconversion (UPC) emission of Yb3+-TM3+ co-doped ZrO2 nanocrystals is reported. The blue (490 nm) UPC emission is due to (1)G(4-)(3)H(6) transition of Tm3+ and the pump power dependence of this UPC emission band are cubic indicating that three excitation photons are involved in the UPC process. An additional UPC emission band at 505 nm is observed when the Yb3+ concentration is above 1.25 mol%. The pump power dependence of the emission at 505 nm is quadratic, indicating that this emission may have its origin from excited Yb3+ pairs producing cooperative UPC. (c) 2005 Elsevier B.V. All rights reserved.

引用

页码：477 / 481

页数：5

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