Anurag Pandey
Department of Physics, University of the Free State, P. O. Box 339, Bloemfontein 9300, South Africa. & Junior High School Balbhadrapur, Ramnagar, Jaunpur-222137, Uttar Pradesh, India.

Sumit Kumar
Department of Chemistry, Bharat Sevak Samaj College, Supaul, B. N. Mandal University, Bihar, India.

Vinod Kumar
Department of Physics, University of the Free State, P. O. Box 339, Bloemfontein 9300, South Africa. & Department of Physics, The University of the West Indies, St. Augustine, Trinidad and Tobago.

H. C. Swart
Department of Physics, University of the Free State, P. O. Box 339, Bloemfontein 9300, South Africa.

DOI https://doi.org/10.33889/PMSL.2023.2.1.004

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Abstract

The present research article explains the upconversion emission behaviour of Ho3+-Yb3+ codoped XWO4 (X = Ba, Ca, Sr) phosphors synthesized using a solid-state reaction technique. The phase formation and structural study were confirmed through X-ray diffraction and Scanning electron microscopy analysis. The role of different host matrix on the upconversion emission spectra have been recorded by 980 nm excitation. The comparison of upconversion emission of Ho3+-Yb3+ codoped XWO4 (X = Ba, Ca, Sr) phosphors was studied. A two-photon absorption process is proposed to achieve the observed upconversion emission via a suitable energy level structure.

Keywords- Tungstate host, Holmium-Ytterbium, Upconversion emission, Energy level diagram.

Citation

Pandey, A., Kumar, S., Kumar, V., & Swart, H. C. (2023). Comparative Upconversion Emission Study of XWO4:Ho3+-Yb3+ (X= Ba, Ca, Sr) Phosphors. Prabha Materials Science Letters, 2(1), 41-47. https://doi.org/10.33889/PMSL.2023.2.1.004.