Photoluminescence study in Gd2O3: Er3+/Yb3+ nanocrystal as a promising sensing probe

The Er3+/Yb3+ codoped Gd2O3nanocrystal (NC) is synthesized by combustion route using rare earths nitrates as precursors with urea as reducing agent. The prepared samples further calcined at 800 °C for better emission intensities. The FESEM image of calcined NChas used to analyse for the shape and size of particles. The agglomerated particles are investigated. The comparatives study of down conversion and up conversion behaviour of calcined NC are monitored, consequently, the red band dominated over the green band assigned at 656, 548 and 523 nm corresponding to 4F9/2 → 4I15/2, 4S3/2→4I15/2 and 2H11/2→4I15/2 transition, respectively. The Fluorescence intensity ratio is investigated with laser pump power. The color CIE coordinates of the calcinedsample at different wavelength (380 and 976 nm) are calculated which shows almostinvariant and applicable as display device.