Structural and Optoelectronic Analysis of Ba5Zn4Gd8O21: Er3+ Nanomaterials Emitting Green Light for Modern Lighting Applications

The present investigation reports the attractive characteristics of vivid-green light-emitting Ba5Zn4Gd8O21:Er3+ nanomaterials fabricated via an eco-friendly and energy-saving solution combustion approach in detail. The Rietveld refinement technique was implemented on x-ray diffraction (XRD) data to analyze the crystallographic features. The photoluminescence emission spectrum showed an extraordinary band at 550 nm when activated under near UV (at 378 nm) light. The highest intensity emission band is attained at 2.0 mol.% Er3+ ions, after which emission was quenched due to a dipole–dipole (d–d) inter-transmission phenomenon. Finally, the vivid-green emission had color coordinate values (0.2401, 0.4492), which were comparable to the standard coordinates of the European Broadcasting Union (EBU) system, making these nanoparticles a suitable green light-emitting constituent of advanced optoelectronic devices such as lasers and near-UV-activated light-emitting diodes (i.e., white-light-emitting diodes).