Eu3+ Ion-doped Lithium Cadmium Orthophosphate Nanopowders for Reddish Orange-emitting Solid-state Lighting Applications

Cole, Sandhya; Basha, Shaik Azad; Naveen Kumar, Basina Veera; Srinivasarao, Kuna; Daniel, Kodamala; Balasubramanyam, Somayajula Venkata

doi:10.22036/pcr.2025.539879.2719

Eu³⁺Ion-doped Lithium Cadmium Orthophosphate Nanopowders for Reddish Orange-emitting Solid-state Lighting Applications

Document Type : Regular Article

Authors

Sandhya Cole ¹

Shaik Azad Basha ¹

Basina Veera Naveen Kumar ²

Kuna Srinivasarao ³

Kodamala Daniel ⁴

Somayajula Venkata Balasubramanyam ¹

¹ Department of Physics, Acharya Nagarjuna University, Guntur-522510, India

² Department of Physics, University of the Free State, Bloemfontein, 9300, South Africa

³ Department of Physics, Government Degree College, Palakonda-532440, A.P., India

⁴ Department of Physics, Dr. Samuel George Institute of Engineering and Technology, Markapur-523316, India

https://doi.org/10.22036/pcr.2025.539879.2719

Abstract

Eu3+ doped Lithium Cadmium Orthophosphate (LCP = Li2Cd2(PO4)2) nanopowders were prepared by using Solid State Reaction (SSR) method. Different structural and spectroscopic techniques were used to characterize the prepared samples. An orthorhombic phase (Pnma space group) with an average crystallite size of 30-39 nm was determined by P-XRD. Clustered irregular stone like shapes were revealed by FE-SEM and elemental composition was confirmed by EDS analysis. FT-IR and Raman analysis were used to identify the (PO4)3- vibrational modes. Optical bandgap values in the range 5.43-5.70 eV were analyzed by DRS study. When excited at 250 nm and 394 nm, PL spectra reveal an emission at 611 nm (5D0 → 7F2) and 693 nm (5D0 → 7F4). By using the PL data PLQY (43% and 4%), concentration quenching and lifetime decay were determined. Photometric analysis was used to calculate color characteristics, such as CCT, CRI, and CP. The prepared samples exhibit reddish orange emissions in their PL spectra. These results indicate the material’s suitability for solid-state lighting devices.

Graphical Abstract