Non-resonant energy transfer from Eu3+ to Yb3+ in C-type and B-type (Eu1-xYbx)2O3 nanocrystals

被引：8

作者：

Candela, M. T. ^{[1
,3
]}

Aguado, F. ^{[2
,3
]}

Diego-Rucabado, A. ^{[1
,3
]}

Gonzalez, J. A. ^{[2
,3
]}

Valiente, R. ^{[1
,3
]}

机构：

[1] Univ Cantabria, Dept Fis Aplicada, Avda Castros 48, Santander 39005, Spain

[2] Univ Cantabria, Dept CITIMAC, Avda Castros 48, Santander, Spain

[3] Univ Cantabria, Grp Nanomed, IDIVAL, Avda Cardenal Herrera Oria, Santander 39011, Spain

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2022年 / 921卷

基金：

欧盟地平线“2020”;

关键词：

Rare Earth sesquioxides; Polymorphism; (Eu1-xYbx)(2)O-3; Nanocrystals; Photoluminescence; Non-resonant Energy transfer; RARE-EARTH SESQUIOXIDES; X-RAY-STRUCTURE; OPTICAL-PROPERTIES; LUMINESCENCE; Y2O3; EUROPIUM; CRYSTALS; SPECTRA; GD; TEMPERATURE;

D O I：

10.1016/j.jallcom.2022.166043

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 structural and spectroscopic properties of (Eu1-xYbx)(2)O-3 nanocrystals with cubic (C-type) and monoclinic (B-type) crystalline structures have been studied. NCs have been synthetized by the sol-gel Pechini method and characterized at room temperature by X-ray diffraction, transmission electron microscopy, diffuse reflectance, Raman spectroscopy and photoluminescence techniques. NIR emission from Yb3+ ions has been observed in both C-and B-type NCs upon excitation of Eu3+ ions at 532 nm, where Yb3+ ions do not absorb photons. This fact reveals that an efficient non-resonant energy transfer process from Eu3+ to Yb3+ takes place, allowing to obtain simultaneous visible and NIR emissions under visible excitation. The decay curves of the 5D0 -> 7F2 Eu3+ emission of C-type NCs corroborate this phenomenon since the Eu3+ lifetime has been found to decrease as the Yb3+ content increases. Finally, we discuss the use of the Eu3+ luminescence as a structural probe to distinguish between different RE2O3 polymorphs.(c) 2022 The Author(s). Published by Elsevier B.V. CC_BY_NC_ND_4.0

引用

页数：13

共 79 条

[1] Raman spectra of R2O3 (R-rare earth) sesquioxides with C-type bixbyite crystal structure: A comparative study [J].