Luminescence Investigation and Structural Properties of Ca ₁₄ Zn ₆ Al ₁₀ O ₃₅ : Dy ³⁺ /Sm ³⁺ Phosphors for Color Tunable LED Applications

ABSTRACT Currently, the development of luminescent materials is a major focus of research. In particular, inorganic phosphor‐based compounds have been widely utilized for different types of applications including cathode ray tubes (CRTs), lamp industries; field emission displays (FEDs), radiation dosimetry, and white light emitting diodes (WLEDs). In this research, we successfully synthesized single‐host Ca 14 Zn 6 Al 10 O 35 : Dy 3+ /Sm 3+ by using the wet chemical method to achieve white light emission. XRD analysis confirmed the phase purity of Ca 14 Zn 6 Al 10 O 35 . SEM images showed that the phosphor materials tend to form agglomerates. Photoluminescence (PL) measurements of Ca 14 Zn 6 Al 10 O 35 :Dy 3+ doped phosphors demonstrated efficient excitation at 353 nm, with prominent emission bands at 488 nm (blue) and 575 nm (yellow). Co‐doping with Sm 3+ ionsresulted in strong blue to red emissions. The color qualities of the luminous prepared samples were calculated using the Commission Internationale de l'Eclairage (CIE) coordinates. Therefore, these findings result suggest that Dy 3+ /Sm 3+ co‐doped Ca 14 Zn 6 Al 10 O 35 phosphors, when excited by UV‐LEDs could be suitable for producing white light emitting diodes and display devices.