Combustion synthesis approach for spectral tuning of Eu doped CaAl2O4 phosphors

- We present a facile solution combustion method for engineering the oxidation state of Eu in open-air.
- Eu2+ is stabilized in CaAl2O4 without using any reducing atmospheres viz. H2/N2 or CO.
- We tune the redox state of Eu (Eu3+ → Eu2+) just by changing the F/O chosen.
- Influence of fuel content on luminescence and colorimetric characteristics were explored.
- We have discussed the underlying mechanisms for the observed spectral characteristics.