Solvent-thermal synthesis and photoluminescence properties of rare-earth based double perovskite Cs2NaRECl6 (RE = Yb0.9Er0.1, Tb, Eu) microcrystals

In this paper, Cs 2 NaRECl 6 (RE = Yb 0.9 Er 0.1 , Tb, Eu) microncrystals (MCs) were synthesized via a facile solvent-thermal method with the ethanol-water mixture (95.6∶4.4, m/m) as solvent. The prepared MCs were characterized by X-ray diffraction (XRD), field emission scanning electron microscopy (FE-SEM) and energy dispersive X-ray spectroscopy (EDS). Photoluminescence (PL) properties of prepared MCs were measured and possible luminescent processes were given.