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Single-phase nanomaterials are the most promising materials, owing to their high luminous-efficiency, environmental-friendly and multicolor-luminance features. The crystal structure of Eu3+/Tb3 + co-doped SrLaAlO4 (SLAO) nanopowders were developed by combustion synthesis (CS). The formation of SLAO materials with tetragonal space group 14/mmm (1 3 9) was confirmed by Rietveld refinement of X-ray diffraction (XRD) arrangement. Multicolor luminescence has been achieved via tailoring Tb3+/Eu3+ ratio into SLAO matrix, under UV and near-UV irradiation. Moreover, energy-transfer (ET) efficiencies and analogous mechanisms have been discussed deeply. This work opens avenues for scholars to explore such nanomaterials for advanced photonic applications like white-LEDs, solar-cells, lasers, photo-detectors, etc.

Dud-white emanation from current phosphor-based white-LEDs (pb-WLEDs) has now emerged as primary gridlock for their commercialization. Thus, coupling of green–blue-red (G-B-R) multi-phase or white single-phase phosphors with near-UV LED chips, clarifies such snags. Heeding the innovative solution, the authors have successfully manufactured novel Sr5Al2O8:Sm3+, Er3+ and Dy3+, via adopting a propitious urea combustion approach. Photoluminescence spectra realized the remarkable orange (599 nm), green (548 nm) and near-white (575 nm) emission. Thereafter, laudable colorimetric performance of nanomaterials with improved color-coordinates, color purity & CCT, suggest their promising usage in photonic appliances like pb-WLEDs, bio-probes, solar cells, telecommunication, lasers and optical sensors.