1. Enhanced upconversion emission in vanadate phosphors for photonic applications.
- Author
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Mukhopadhyay, Lakshmi, Dutta, Joydip, and Rai, Vineet Kumar
- Abstract
Herein, the synthesis of Ho3+/Yb3+: GdVO4 phosphors by using solid state reaction technique is reported. The crystal structure and phase formation of developed materials has been confirmed by XRD analysis. The spectroscopic properties have been studied by using the diffuse reflectance and upconversion (UC) emission spectra. The band gap of the phosphors has been calculated by using Tauc Plot. The UC intensity of all emission bands in Ho3+-Yb3+codoped GdVO4 phosphors enhances significantly in comparison to the Ho3+ doped GdVO4 phosphors. The pump power dependence has been performed to obtain the photon number responsible for UC emission. The basic mechanism involved behind the UC emissions, observing all kinds radiative and non-radiative emission between the energy levels has been discussed using energy level diagram. The photometric characterization has been analyzed to verify the emission colourpurity from the developed phosphors. The obtained results inferred the suitability of the phosphors in efficient upconverters, LEDs and other photonic applications. [ABSTRACT FROM AUTHOR]
- Published
- 2024
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