Investigation of energy transfer and concentration quenching of Dy 3+ luminescence in Gd(BO2)3 by means of fluorescence dynamics

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机构：

[1] Zhang, Xinmin

[2] Meng, Fangui

[3] Li, Wenlan

[4] Kim, Sun Il

[5] Yu, Young Moon

[6] Seo, Hyo Jin

来源：

Zhang, X. (zhangxinminam@gmail.com) | 1600年 / Elsevier Ltd卷 / 578期

关键词：

In this paper; the photoluminescence (PL) properties of Dy3+ activated Gd(BO2)3 phosphors are presented by means of fluorescence dynamics excited by pulsed laser light (λ = 266 nm). Energy transfer from Gd3+ to Dy3+ and concentration quenching of the Dy3+ luminescence are studied. From the PL spectra and decay curves the energy transfer from Gd3+ to Dy3+ is confirmed. The decay curves of Dy3+4F9/2 - 6H13/2 transition exhibiting build-up and decay process confirm the energy transfer between Gd3+ to Dy3+. The rise time becomes shorter as the Dy3+ concentration increases. The theoretical luminescence decay curves of (Gd1xDy x)(BO2)3 samples agree well with the experimental observations. The concentration quenching of the Dy3+ ion emission can be ascribed to resonant cross-relaxation. The interaction between the Dy3+ ions is probably of the electric dipole-dipole type through fitting the data with Inokuti-Hirayama (I-H) model. The energy transfer parameters and critical distance for the transfer processes are given. © 2013 Elsevier B.V. All rights reserved;

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