Achieving Bright Reddish-Orange Luminescence in CaSnO₃ Ceramics through Doping Manipulation

Abstract

The reddish-orange phosphors of rare-earth activator have attracted intense interest due to their applications in lighting and display devices, including plasma display panel, field emission display and white light diode. In this work, Eu-doped CaSnO₃ phosphor materials were prepared and examined. Their X-ray diffraction patterns were used for lattice parameters calculations and show that there was no phase transformation in all doping conditions. XANES studies suggest the stabilization of Sn and Eu ions in 4+ and 3+ oxidation states in the prepared phosphors, respectively. A broad emission band, with a major peak at 614 nm upon excitation wavelength of 395 nm, was observed in the range of 550 to 730 nm at room temperature due to ⁵D₀ → ⁷F_J transition of Eu³⁺ ions. The luminescent spectra of the samples showed the intense light emission in the red-orange light region.

Keywords:

• Eu³⁺ ions
• reddish-orange emitting
• phosphor ceramic

Additional information

Funding

This work has been partially supported by the Research Network NANOTEC (RNN) program of the National Nanotechnology Center (NANOTEC), NSTDA, Synchrotron Light Research Institute (Public Organization), Thailand. Ministry of Science and Technology, Thailand and also acknowledge the financial support for a Full-time Doctoral Researcher from Suranaree University of Technology (SUT).