Er3+-doped BaTiO3 nanocrystals for thermometry:: Influence of nanoenvironment on the sensitivity of a fluorescence based temperature sensor

被引：274

作者：

Alencar, MARC

Maciel, GS ^{[1
]}

de Araújo, CB

Patra, A

机构：

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

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

来源：

APPLIED PHYSICS LETTERS | 2004年 / 84卷 / 23期

关键词：

D O I：

10.1063/1.1760882

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Frequency upconverted emissions centered at 526 and 547 nm from two thermodynamically coupled excited states of Er3+ doped in BaTiO3 nanocrystals were recorded in the temperature range from 322 to 466 K using a diode laser emitting at 980 nm as the excitation source. The ensemble measurements of the fluorescence intensity ratio (FIR) of the signals at 526 and 547 nm as a function of the temperature showed that the sensitivity (the rate in which the FIR changes with the temperature) of such sensor depends on the size of the nanocrystal. This is explained taking into consideration modifications of nonraditive relaxation mechanisms with the size of the nanocrystals. (C) 2004 American Institute of Physics.

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页码：4753 / 4755

页数：3

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