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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.)

Tuning multicolor emission in AgNCs/Tm3+/Mn2+-doped fluorophosphate glasses

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Fares, Hssen [1] ; Castro, Tarcio [2] ; Franco, Douglas Faza [1] ; Fucikova, Anna [2] ; da Silva, Robson R. [3] ; Valenta, Jan [2] ; Ribeiro, Sidney J. L. [1] ; Nalin, Marcelo [1]
Total Authors: 8
[1] Sao Paulo State Univ, UNESP, Inst Chem, BR-14800060 Araraquara, SP - Brazil
[2] Charles Univ Prague, Fac Math & Phys, Dept Chem Phys & Opt, Ke Karlovu 3, Prague 12116 2 - Czech Republic
[3] Chalmers Univ Technol, Dept Chem & Chem Engn, SE-41296 Gothenburg - Sweden
Total Affiliations: 3
Document type: Journal article
Source: Journal of Non-Crystalline Solids; v. 535, MAY 1 2020.
Web of Science Citations: 0

Herein we report the synthesis of highly-doped silver nanocluster in fluorophosphate glasses through the melting-quenching method in order to achieve sensitization with Tm3+ and Mn2+ ions. Blue and red emission belonging to Tm3+ (470 to 490 nm) and Mn2+ (550 to 750 nm) ions could be obtained via non-resonant excitation of Tm3+ and Mn2+. Slight decrease of the fluorescence decay times confirmed an energy transfer as a possible mechanism to explain the Tm3+ and Mn2+ emission. The composition of 5 mol% of AgNO3, 0.4 mol% of Tm2O3 and 0.2 mol% of MnF2 in our sample leads to distance between donor (silver nanoclusters) and acceptor (Tm3+-Mn2+) as short as 11 angstrom, which suggests that the main mechanism for blue and red emission from Tm3+ and Mn2+ is Forster Resonance Energy Transfer (FRET). The results presented here show that the studied material has potential application for multicolor generation as luminophore in white light emitting diodes (W-LED). (AU)

FAPESP's process: 16/16343-2 - Synthesis and characterization of glass and glass-ceramics containing rare earth ions
Grantee:Hssen Fares
Support type: Scholarships in Brazil - Post-Doctorate
FAPESP's process: 13/07793-6 - CEPIV - Center for Teaching, Research and Innovation in Glass
Grantee:Edgar Dutra Zanotto
Support type: Research Grants - Research, Innovation and Dissemination Centers - RIDC
FAPESP's process: 16/16900-9 - Preparation of heavy metal oxide glasses fibers with optical and magneto-optical properties
Grantee:Douglas Faza Franco
Support type: Scholarships in Brazil - Post-Doctorate