Structure, luminescence of Eu2+ and Eu3+ in CaMgSi2O6 and their co-existence for the excitation-wavelength/temperature driven colour evolution
- 8 June 2021
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in Dalton Transactions
- Vol. 50 (29), 10050-10058
- https://doi.org/10.1039/d1dt01377g
Abstract
Luminescent materials with controllable colour evolution features are demanded for the development of multi-level anti-counterfeiting technologies. Here we report the structural and luminescence properties of CaMgSi2O6:Ln (Ln = Eu2+, Eu3+, Eu2+/3+) samples in detail and reveal their excitation-wavelength/temperature driven colour evolution characteristics. By tuning either the excitation-wavelength (276, 304, 343, 394 nm) or temperature (in the 330–505 K range), the designed samples with co-existing Eu2+/Eu3+ ions can achieve diverse and controllable colour evolution from red, to pink, purple and blue. This shows their potential application in anti-counterfeiting with the help of sophisticated pattern design. In addition, the underlying mechanism of the Stokes shift of the Eu2+ emission and valence stability of both Eu2+/Eu3+ ions in CaMgSi2O6 are also studied in depth. These results are valuable for designing colour-controllable luminescent materials based on the co-existence of the Eu2+/Eu3+ ions for anti-counterfeiting applications.Keywords
Funding Information
- National Natural Science Foundation of China (21671201, U1632101, 61635012, 11974338)
- Chongqing University of Posts and Telecommunications (W2017011, 2015013, W2016-01)
- Eesti Teadusagentuur (PUT PRG111)
- European Regional Development Fund (TK141)
- Narodowe Centrum Nauki (2018/31/B/ST4/00924)
This publication has 34 references indexed in Scilit:
- Ce3+ 5d-centroid shift and vacuum referred 4f-electron binding energies of all lanthanide impurities in 150 different compoundsJournal of Luminescence, 2013
- Luminescence of Ba2Ca(BO3)2 : Ce3+—influence of charge compensator, energy transfer and LED applicationJournal of Physics D: Applied Physics, 2009
- Vibronic coupling parameters and Stokes shift in thiogallate phosphorsJournal of Physics and Chemistry of Solids, 2008
- Wavelength-tunable and thermally stable Li-α-sialon:Eu2+ oxynitride phosphors for white light-emitting diodesApplied Physics Letters, 2006
- Synthesis of Blue-Emitting CaMgSi2O6:Eu2+ Phosphor Using an Electrostatic Self-Assembly Deposition MethodJournal of the American Ceramic Society, 2006
- Thermal quenching of Eu2+5d–4f luminescence in inorganic compoundsJournal of Physics: Condensed Matter, 2005
- Structural refinement of Eu doped CaMgSi2O6 using X-ray powder diffraction dataJournal of Luminescence, 2005
- A simple model for f→d transitions of rare-earth ions in crystalsJournal of Solid State Chemistry, 2003
- Luminescence properties of Eu2+-activated alkaline earth haloboratesJournal of Luminescence, 1989
- Revised effective ionic radii and systematic studies of interatomic distances in halides and chalcogenidesActa Crystallographica Section A, 1976