Photoinduced Preparation of Bandgap-Engineered Garnet Powders
| Autor: | Vitezslav Jary, M. Nikl, Alena Beitlerova, Tomáš Parkman, Dalibor Pánek, Jan Bárta, Václav Čuba |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Nuclear and High Energy Physics
Materials science Aqueous solution 010308 nuclear & particles physics Band gap Doping 02 engineering and technology 021001 nanoscience & nanotechnology 01 natural sciences Evaporation (deposition) law.invention Lattice constant Nuclear Energy and Engineering law Phase (matter) 0103 physical sciences Physical chemistry Calcination Electrical and Electronic Engineering 0210 nano-technology Luminescence |
| Zdroj: | IEEE Transactions on Nuclear Science |
| ISSN: | 1558-1578 0018-9499 |
| DOI: | 10.1109/tns.2018.2803278 |
| Popis: | The indirect photochemical synthesis for the preparation of bandgap- or defect-engineered multicomponent garnet powders from aqueous solutions was investigated. Gd3(Ga,Al)5O12 (GGAG) doped with Ce or Ce + Eu and Lu3(Al,Sb)5O12 doped with Eu were produced by calcination of the prepared solid precursors at various conditions and their structural and luminescence properties including decay curves were thoroughly studied. In GGAG:Ce, the content of Ga was shown to have strong impact on the lattice parameter and position of the Ce3+ 5 d - $4f$ emission. To induce the formation of Ce4+ ions as defects competing with electron traps, Mg2+ ions were added into the solutions and calcination in air was examined. Both factors were shown to cause the decrease of Ce3+ emission intensity and acceleration of luminescence decay in a similar way. The doping with Sb(III) required calcination of solid precursors in inert atmosphere to prevent formation of an unknown pyrochlore-type phase containing Sb(V). Low temperatures were needed to limit Sb2O3 evaporation during calcination. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|