ICCAS OpenIR
Crystalline-structure-dependent green and red upconversion emissions of Er3+-Yb3+-Li+ codoped TiO2
Cao, B. S.1,2; He, Y. Y.3; Feng, Z. Q.1; Song, M.1; Dong, B.1
2011-06-15
Source PublicationOPTICS COMMUNICATIONS
ISSN0030-4018
Volume284Issue:13Pages:3311-3314
AbstractCrystalline structures and infrared-to-visible upconversion luminescence spectra have been investigated in 1 mol% Er3+, 10 mol% Yb3+ and 0-20 mol% Li+ codoped TiO2 [1Er10Yb(0-20)Li:TiO2] nanocrystals. The crystalline structures of 1Er10Yb(0-20)Li:TiO2 were divided into three parts by the addition of Yb3+ and Li+. Both green and red upconversion emissions were observed from the H-2(11/2)/S-4(3/2) -> I-4(15/2) and F-4(9/2) -> I-4(15/2) transitions of Er3+ in Er3+-Yb3+-Li+ codoped TiO2, respectively. The green and red upconversion emissions of 1Er:TiO2 were enhanced significantly by Yb3+ and Li+ codoping, in which the intensities of green and red emissions and the intensity ratio of green to red emissions (I-green/I-red) were highly dependent on the crystalline structures. The significant enhanced upconversion emissions resulted from the energy migration between Er3+ and Yb3+ as well as the distortion of crystal field symmetry of Er3+ caused by the dissolving of Li+ at lower Li+ codoping concentration and the phase transformation at higher Li+ concentration. It is concluded that codoping with ions of smaller ionic radius like Li+ can efficiently improve the upconversion emissions of Er3+ or other rare-earth ions doped luminsecence materials. (C) 2011 Elsevier B.V. All rights reserved.
KeywordOptical Materials Sol-gel Growth Crystal Structure Luminescence
DOI10.1016/j.optcom.2011.03.005
Indexed BySCI
Language英语
WOS IDWOS:000291179200024
PublisherELSEVIER SCIENCE BV
Citation statistics
Cited Times:21[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.iccas.ac.cn/handle/121111/71422
Collection中国科学院化学研究所
Corresponding AuthorDong, B.
Affiliation1.Dalian Nationalities Univ, Sch Sci, Dalian 116600, Peoples R China
2.Chinese Acad Sci, Changchun Inst Appl Chem, State Key Lab Polymer Phys & Chem, Changchun 130022, Peoples R China
3.Univ Duisburg Essen, Fac Phys, D-47057 Duisburg, Germany
Recommended Citation
GB/T 7714
Cao, B. S.,He, Y. Y.,Feng, Z. Q.,et al. Crystalline-structure-dependent green and red upconversion emissions of Er3+-Yb3+-Li+ codoped TiO2[J]. OPTICS COMMUNICATIONS,2011,284(13):3311-3314.
APA Cao, B. S.,He, Y. Y.,Feng, Z. Q.,Song, M.,&Dong, B..(2011).Crystalline-structure-dependent green and red upconversion emissions of Er3+-Yb3+-Li+ codoped TiO2.OPTICS COMMUNICATIONS,284(13),3311-3314.
MLA Cao, B. S.,et al."Crystalline-structure-dependent green and red upconversion emissions of Er3+-Yb3+-Li+ codoped TiO2".OPTICS COMMUNICATIONS 284.13(2011):3311-3314.
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