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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

A new path to design near-infrared persistent luminescence materials using Yb3+-doped rare earth oxysulfides

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Machado, Ian Pompermayer [1] ; Santos Pedroso, Cassio Cardoso [2] ; de Carvalho, Jose Miranda [3] ; Teixeira, Veronica de Carvalho [4] ; Veloso Rodrigues, Lucas Carvalho [1] ; Brito, Hermi Felinto [1]
Total Authors: 6
[1] Univ Sao Paulo, Dept Fundamental Chem, Inst Chem, BR-05508000 Sao Paulo, SP - Brazil
[2] Univ Sao Paulo, Dept Biochem, Inst Chem, BR-05508000 Sao Paulo, SP - Brazil
[3] Univ Sao Paulo, Inst Phys, BR-05508000 Sao Paulo, SP - Brazil
[4] Brazilian Ctr Res Energy & Mat CNPEM, Brazilian Synchrotron Light Lab LNLS, BR-13083970 Campinas, SP - Brazil
Total Affiliations: 4
Document type: Journal article
Source: SCRIPTA MATERIALIA; v. 164, p. 57-61, APR 15 2019.
Web of Science Citations: 2

RE2O2S:Yb3+ and (REOS)-O-2-S-2:Yb3+,Ti,Mg2+ near-infrared persistent luminescence materials (RE3+: La, Gd, Y) were designed based on the efficient red-emitting RE2O2S:Eu3+,Ti,Mg2+, due to the similar ground state level positions between Eu3+ and Yb3+. The Y2O2S:Yb3+,Ti,Mg2+ showed the longest near-infrared (similar to 983 nm) persistent luminescence time (similar to 1 h) when excited at the charge transfer transition, demonstrating that Ti,Mg2+ co-doping enhances the persistent luminescence only for the Y2O2S host. The unprecedented relationship between Eu3+ and Yb3+ persistent luminescence opens a new path in the systematic design of efficient Yb3+-activated persistent luminescence materials e.g. Y2O2S:Yb3+,Ti,Mg2+, which present potential for photonic applications such as bioimaging probes. (C) 2019 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved. (AU)

FAPESP's process: 17/09774-0 - Generation and detection of singlet oxygen in complex systems for cell lesions studies using upconversion nanoparticles
Grantee:Cássio Cardoso Santos Pedroso
Support Opportunities: Scholarships in Brazil - Post-Doctorate
FAPESP's process: 17/05195-5 - Structure-property relations of inorganic luminescent materials obtained by microwave-assisted synthesis method
Grantee:Jose Miranda de Carvalho Junior
Support Opportunities: Scholarships in Brazil - Post-Doctorate