Crystal structure and photophysical features of greenish perovskite type SrLa₂Al₂O₇:Er³⁺ nanocrystals for down conversion white LEDs

Tetragonal phase perovskite type SrLa2(1−x)Er2xAl2O7 (x = 1.0–5.0 mol%) nanocrystals emitting green light were prepared by a facile, economical and efficient solution combustion route. Detailed analysis of their crystal structure and lattice refinement was carried out by x-ray Diffraction and Rietveld refinement, which confirmed their tetragonal phase along with 14/mmm (139) space group. Morphological investigation was done by Scanning Electron...