Photoluminescent investigation of Ba2LaV3O11:Dy3+ nanophosphors with cool white light emission for near-UV based WLEDs

Abstract

Dy3+ doped Ba2LaV3O11 nanophosphor is one of the most promising energy converters for solid-state lighting (SSL) as it has outstanding potential to absorb near-ultraviolet light along with brilliant luminous features. Ba2LaV3O11 nanophosphors doped with varied compositions of Dy3+ ions are successfully prepared through an energy-efficient urea-based solution combustion production route. Benefitting from its facile synthesis route at low cost, longer operational lifetime the prepared nanophosphors may be used as luminescent material for WLEDs. Recently, modern white light-emitting diodes (WLEDs) have been fabricated based on the energy-conversion via efficient phosphor material. The current report is about the realization of white light emanation through doping a single dopant ion in vanadate host lattice. The outcomes evidence that the optimum Ba2La0.97Dy0.03V3O11 nanophosphor exhibits excellent performance in WLEDs. The diffuse reflectance spectrum (DRS) measured for the optimum nanopowder sample is subjected to Tauc's plot analysis, revealing a higher optical band-gap of 3.69 eV. The typical photoluminescence emission transitions of Dy3+ ions noticed in wavelength ranging from 400 nm to 650 nm are owing to intra 4f shifts upon excitation via 352 nm wavelength. In last, photometric characterizations are carried out disposing the outstanding result of color chromaticity coordinates as well as correlated color temperature (CCT) value.