Multicolor tunable emission induced by Cu ion doping of perovskite zirconate

被引：13

作者：

Lee, D. J. ^{[1
]}

Lee, Y. S. ^{[1
]}

Noh, H. -J. ^{[2
]}

机构：

[1] Soongsil Univ, Dept Phys, Seoul 156743, South Korea

[2] Chonnam Natl Univ, Dept Phys, Kwangju 500757, South Korea

来源：

JOURNAL OF LUMINESCENCE | 2016年 / 169卷

基金：

新加坡国家研究基金会;

关键词：

Multicolor emission; Cu-ion doping; SrZrO3; Mixed valence states; COPPER; TRANSITIONS; FILMS;

D O I：

10.1016/j.jlumin.2015.08.067

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We report on a multicolor tunable emission induced by Cu ion doping of perovskite zirconate SrZr03 with a fairly large bandgap (5.6 eV). X-ray photoelectron spectroscopy of our samples revealed the existence of two mixed valence states of the doped Cu ions, +1 and +2, with a ratio of 3:1. In photoluminescence excitation spectroscopy the absorption structures of the 3d states in monovalent Cu+ and divalent Cu2+ were identified near 5 eV and 3.5 eV, respectively. Interestingly, in relation to the valence states of the Cu ions, the emission spectra depended strongly on the photo-excitation energy (E-ex). For E-ex < 3.8 eV (UVA) two orange and green emissions were observed with the involvement of the Cu2+ state. For E-ex > 3.8 eV (UVB/UVC), however, the Cu state, instead of the Cu2+ state, was dominant in the emission process, causing the visible emission to be turned into violet. Our results were indicative of the complementary role of the different Cu-ion valence states in a wide range of visible emission with respect to Eex. (C) 2015 Elsevier B.V. All rights reserved.

引用

页码：128 / 131

页数：4

共 23 条

[1] Ferroelectric properties of BaZrO3/PbZrO3 and SrZrO3/PbZrO3 superlattices: An ab-initio study [J].