Investigations On Structural & Luminescence Characteristics Of Sm³⁺Stimulated Bi₂La₄O₉ Binary System For LEDs

The new-fangled red-emitting phosphor Sm³⁺: Bi₂La₄O₉ via the simplistic solid-state route is Characterised by X-ray diffraction (XRD). The synthesised samples bear identify with the monoclinic unit cell of C_2/m space group. The optical traits interpreted by the UV–visible analysis and spectrometric evaluations, as well estimates the decay lifetimes. The f-f traits of Sm³⁺ 408, 425, 480 and 491 nm impact the characteristic emission lines. Fine tuning the doping concentration of Sm³⁺ ions favours the sample phosphor to realize efficaciously tunable red colour. It is also inferred from the CIE coordinate chart that the single dopant Sm³⁺ with squat CCT and soaring colour clarity counts lies in the red region. The revelation of Bi₂La₄O₉:Sm³⁺phosphors are nearly the same as the predetermined values of the Nichia corp red-light emitting diodes. The computed calculations of colour coordinates and the CCT of Sm³⁺ions observed to be below 3000k for warm light when excited by 491 nm wave length. This authenticate the Sm³⁺: Bi₂La₄O₉ phosphor pertinently tunable candidate with the potential for efficient red display and solid state lighting appliances.