Neutral and warm white light emission in Tb3+/Sm3+ zinc phosphate glasses
| Autor: | A.N. Meza-Rocha, G. Muñoz H., A. Speghini, M. Bettinelli, U. Caldiño |
|---|---|
| Rok vydání: | 2015 |
| Předmět: |
Sm3+
Photoluminescence Quenching (fluorescence) Materials science Organic Chemistry Non-radiative energy transfer Tb3+ Sm3+ Zinc phosphate glass Photoluminescence Analytical chemistry Zinc phosphate Quantum yield Atomic and Molecular Physics and Optics Photon upconversion Electronic Optical and Magnetic Materials Inorganic Chemistry chemistry.chemical_compound chemistry Tb3+ Zinc phosphate glass Emission spectrum Non-radiative energy transfer Electrical and Electronic Engineering Physical and Theoretical Chemistry Chromaticity Spectroscopy |
| Zdroj: | Optical materials (Amst., Print) 47 (2015): 537–542. doi:10.1016/j.optmat.2015.06.035 info:cnr-pdr/source/autori:Meza-Rocha, A. N.; Munoz H., G.; Speghini, A.; Bettinelli, M.; Caldino, U./titolo:Neutral and warm white light emission in Tb3+%2FSm3+ zinc phosphate glasses/doi:10.1016%2Fj.optmat.2015.06.035/rivista:Optical materials (Amst., Print)/anno:2015/pagina_da:537/pagina_a:542/intervallo_pagine:537–542/volume:47 |
| ISSN: | 0925-3467 |
| DOI: | 10.1016/j.optmat.2015.06.035 |
| Popis: | A spectroscopy analysis of Tb 3+ and Tb 3+ /Sm 3+ doped zinc phosphate glasses based on emission spectra and decay time profiles was performed. The Tb 3+ singly doped glass shows a green overall emission with x = 0.258 and y = 0.429 CIE1931 chromaticity coordinates, upon Tb 3+ excitation at 318 nm. Under co-excitations of Tb 3+ and Sm 3+ at 344, 361 and 374 nm, the Tb 3+ /Sm 3+ co-doped glasses display neutral and warm white overall emissions with CIE1931 chromaticity coordinates in ranges of x = 0.407–0.487 and y = 0.437–0.485, color temperature in the range of 2447–4024 K and quantum yield up to 12.38%, depending on the excitation wavelength and relative amount of Tb 3+ and Sm 3+ . In all cases, it was observed that the Sm 3+ emission is enhanced by the addition of Tb 3+ , which is correlated with a quenching of the Tb 3+ emission as consequence of a non-radiative Tb 3+ → Sm 3+ energy transfer process. The non-radiative nature of the energy transfer process was inferred by the shortening of the Tb 3+ emission decay time observed in the Tb 3+ /Sm 3+ co-doped zinc phosphate glasses. An analysis of the Tb 3+ emission decay time profiles by the Inokuti–Hirayama model suggests that an interaction electric dipole–dipole into the Tb 3+ –Sm 3+ clusters might dominate in the energy transfer process with efficiency and probability of 0.23–0.25 and 96.22–111.35 s −1 , respectively. |
| Databáze: | OpenAIRE |
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