Structural and photoluminescence properties of orange emitting perovskites SrZrO3:Sm3+ phosphors for solid-state lighting
Abstract
In this study, a series of Sr1-xZrO3:xSm (x = 0.01 ≤ x ≤ 0.11) samples were synthesized using the sol-gel process. X-ray diffraction (XRD), scanning electron microscope (SEM), UV-visible and photoluminescence (PL) spectroscopy were employed to analyze these phosphors. The reporting of the bandgap energies (Eg), for which the diffuse-reflectance spectra of the Sr0.97ZrO3:Sm0.03 phosphor was used, is based on the Kubelka-Munk (K-M) function. Under the 406 nm excitation, the three Sm3+-emission transitions 4G5/2 → 6H5/2 (562 nm), 4G5/2 → 6H7/2 (599 nm), and 4G5/2 → 6H9/2 (644 nm) were observed for all the samples. The diminishing Sm3+-emission intensity that was observed was analyzed in the evaluation of the critical transfer rate (Rc) and the energy-transfer interaction parameter (Q). The CIE-chromaticity color coordinates of the Sm3+-doped SrZrO3 indicate that the prepared phosphors may act as an orange-emitting-light converter for the white LED.
- Publication:
-
Solid State Sciences
- Pub Date:
- January 2019
- DOI:
- 10.1016/j.solidstatesciences.2018.09.003
- Bibcode:
- 2019SSSci..87..163S
- Keywords:
-
- Phosphor;
- Sm<SUP>3+</SUP> ions;
- Diffuse reflectance;
- Energy band gap;
- Photoluminescence