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Vol. 38 No. 8 (2026): Vol 38, Issue 8 (2026)

Copyright (c) 2026 Shaik Azad Basha, K. Srinivasa Rao, K. Daniel, B.V. Naveen Kumar, Sandhya Cole

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This work is licensed under a Creative Commons Attribution 4.0 International License.

Reddish Orange Emitting Sm3+ Ion on Lithium Cadmium Orthophosphate Nanopowders for Solid State Lighting Applications

https://doi.org/10.14233/ajchem.2026.36352
Shaik Azad Basha
Department of Physics, Acharya Nagarjuna University, Guntur-522510, India
https://orcid.org/0000-0001-8132-8486
K. Srinivasarao
Department of Physics, Government Degree College, Palakonda-532440, India
https://orcid.org/0000-0002-9970-6243
K. Daniel
Department of Physics, Dr. Samuel George Institute of Engineering and Technology, Markapur-523316, India
https://orcid.org/0009-0003-8525-122X
B.V. Naveen Kumar
Department of Physics, University of the Free State, Bloemfontein 9300, South Africa
https://orcid.org/0000-0003-4700-5442
Sandhya Cole
Department of Physics, Acharya Nagarjuna University, Guntur-522510, India
https://orcid.org/0000-0002-1827-2149

Corresponding Author(s) : Sandhya Cole

sandhya.cole@gmail.com

Asian Journal of Chemistry, Vol. 38 No. 8 (2026): Vol 38, Issue 8 (2026)

Abstract

Sm3+-doped Li2Cd2(PO4)2 (LCP) nanopowders were prepared using solid state reaction (SSR) method. Several analytical methods were used to examine the prepared samples structural, morphological, vibrational and luminous characteristics. The XRD analysis reveals that the samples were in the orthorhombic with Pnma space group in the nanoscale. The average crystallite size for the samples were determined using Debye Scherrer’s and W-H plot methods. Surface morphology revealed an irregular stone-like clustered architecture. FT-IR and Raman spectroscopy were employed to investigate the vibrational characteristics of the samples. DRS analysis estimated optical bandgap values of 5.43 eV for the undoped sample and 5.01, 5.05, and 5.19 eV for the 0.01%, 0.05%, and 0.09% Sm3+-doped LCP samples, respectively. The photoluminescence spectrum exhibited a prominent emission at 649 nm upon excitation at 401 nm. Concentration quenching behaviour, average lifetime, quantum yield, correlated colour temperature (CCT), colour purity (CP) and colour rendering index (CRI) were systematically evaluated. The optical characteristics indicate that the developed Sm3+-doped LCP phosphors possess strong potential for application in reddish-orange light-emitting devices.

Keywords

Li2Cd2(PO4)2 Photoluminescence Lifetime analysis Dexter’s theory
(1)
Basha, S. A.; Srinivasarao, K.; Daniel, K.; Kumar, B. N.; Cole, S. Reddish Orange Emitting Sm3+ Ion on Lithium Cadmium Orthophosphate Nanopowders for Solid State Lighting Applications. ajc 2026, 38, 2151-2162.
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