Document Type : Regular Article
Authors
1
Department of Physics, Acharya Nagarjuna Univeristy, Guntur-522510,A.P, India. Department of Physics, Shri Vishnu Engineering College for Women (A), Bhimavaram-534202, A.P, India
2
Department of Physics, Acharya Nagarjuna Univeristy, Guntur-522510,A.P, India. Department of Physics, V.R.Siddhartha Engineering College (A), Kanuru, Vijayawada-520007, A.P. India
3
Crystal Growth & Nanoscience Research Center, Government College (A), Rajahmundry- 533105, A.P, India
4
Department of Physics, Acharya Nagarjuna Univeristy, Guntur-522510,A.P, India. Department of Physics, Government Institute of Textile Technology, Guntur-522005, A.P., India
5
Department of Physics, Acharya Nagarjuna Univeristy, Guntur-522510,A.P, India
10.22036/pcr.2022.333784.2050
Abstract
Lanthanum Zirconate (La2Zr2O7) doped with Bi3+ and co-doped with Dy3+ ions were synthesized by Polyol method and their luminescence properties are reported in this study. From XRD results, the pure cubic phase with the Fd3̅m space group (#227) was confirmed for the as-prepared samples. Absorption studies were performed, to know the absorption properties and estimated the optical energy band gap values of the as-prepared samples. The Morphological studies of the as-prepared samples exhibits irregular shaped agglomerates with particle size between 60 and 90 nm. PL emission spectra of Bi3+ doped La2Zr2O7 emits blue colour located at 460 nm (3P1→1S0 transition) when excited at 330 nm. The Bi3+ and Dy3+ co-doped sample exhibits PL emission peaks around 480 nm (4F9/2→6H15/2) and 575 nm (4F9/2→6H13/2) when excited at 307 nm. From PL studies the optimized composition is identified as La2Zr2O7: 0.5 at% Bi3+; 2 at% Dy3+ which emits strong tunable blue-yellow emissions. The co-doping of Dy3+ with Bi3+ in the host lattice enhances the emission intensities which makes this as a promising compound for pc-LED applications.
Graphical Abstract
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