pH controlled Ho3+–Yb3+ codoped Y2O3 nanowires for display devices

• Preparation of Ho3+–Yb3+ codoped Y2O3 phosphor at different pH.
• Change in morphology due to pH variation.
• Correlate the morphology and UC luminescence behaviour.

The wire like structure with particle size in the nanometer range of Ho3+–Yb3+ codoped Y2O3 phosphors have been synthesized through hydrothermal synthesis route by controlling the pH value. The Field emission scanning electron microscopy (FESEM) and X-ray diffraction (XRD) analysis of the synthesized phosphor powders have been studied which confirms the formation of nanowires in the prepared materials and the formation of proper crystalline structure respectively. The frequency upconversion emission spectra under 980 nm excitation have been recorded and an efficient green emission has been observed. The excitation energy corresponding to the NIR photon seems to be fully utilized for the emission lying in the green region. The Fourier transform infrared (FTIR) spectroscopic analysis for existence of the impurities in the developed material has also been performed. The experimental observation proves the utility of the prepared material in the display devices and diagnosis purposes.

Effect of pH variation on the UC emission intensities.Figure optionsDownload as PowerPoint slide