Multidoped Ln3+ gadolinium dioxycarbonates as tunable white light emitting phosphors
| Autor: | Valentina Caratto, Ilaria Nelli, Federico Locardi, Giorgio Costa, R. Van Deun, Anna M. Kaczmarek |
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| Rok vydání: | 2017 |
| Předmět: |
Lanthanide
Materials science Gadolinium Doping Oxalic acid Analytical chemistry Hexagonal phase chemistry.chemical_element Phosphor 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences Ion Inorganic Chemistry chemistry.chemical_compound chemistry 0210 nano-technology Luminescence |
| Zdroj: | Dalton Transactions. 46:2785-2792 |
| ISSN: | 1477-9234 1477-9226 |
| DOI: | 10.1039/c6dt04629k |
| Popis: | Gadolinium dioxycarbonates co-doped with different visible emitting lanthanides were synthesized via a co-precipitation method using oxalic acid as a precipitating agent. Through XRD and DTA/TG investigations, the type-II hexagonal phase of the lanthanide dioxycarbonates was confirmed for all of the samples. The materials constitute of big agglomerates formed by submicrometrical particles. By varying the Ln3+ doping percentages and ratios and by changing the excitation wavelength the gadolinium dioxycarbonates activated with Sm3+, Eu3+, Tb3+, Dy3+ and Tm3+ showed tunable emission colors. Luminescence measurements were performed in order to determine: the luminescence behavior of the ions, the CIE coordinates, the CCT values and potential energy transfer. Interesting results were achieved upon exciting the samples at 351 nm and 365 nm demonstrating the possibility to obtain white emission in the dioxycarbonate matrix. |
| Databáze: | OpenAIRE |
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