Abstract
A new-variety of cool-white-emitting Ba2YAlO5:Dy3+ nanomaterials has been prepared via a cost-effective, energy-saving and ecofriendly propellant-combustion-synthesis, to boost the performance of single–phase wLEDs (white-light-emitting diodes). X-ray-diffraction-profiles substantiate distortion-free Dy3+-diffusion into monoclinic Ba2YAlO5-prototype. Photoluminescence-spectra exhibits two-emission-bands in visible-domain centered at 486 (bluish) and 579 nm (golden), to impart white-color to powders. Additionally, decay-time, non-radiative rates, radiative-lifetime and quantum-efficiency are examined by Auzel’s model. White-light parameters (color-coordinates (0.2702, 0.3308), color-purity (24.89 × 10−2) & color-temperature (9132 K)) emulate the standard-NTSC and LED-white-coordinates. Henceforth, aforementioned outcomes suggest their successful employment for advanced lasers, white-LEDs, security-labels, bio-imaging, latent-fingerprinting and photovoltaic-applications.
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