An efficient SiO2:Ce porous nanophosphor with high color purity to fulfil the cyan emission gap of field emission displays (FEDs)

An efficient SiO₂:Ce nanophosphor has been synthesized by fuel assisted combustion method, later annealed in a reducing atmosphere to achieve phase stability and to monitor the effect on its CL properties. The formation of low–quartz’s structure is reported by using XRD analysis. The spherical porous nanosized morphology is revealed by HRTEM analysis. The porous nanophosphor is excited by electron beam exposure at pressure of 10^{− 6} Torr with different electric power (i.e. voltage of 1−5 keV and current of 3−18 µA). A stable cyan (blue−green) emission has been recorded regardless of change in applied electrical power. The minor increase in the CL intensity is also noted for annealed nanophosphor. In the RGB color model, used to create all the colours on a computer or television display, cyan is made by mixing equal amounts of green and blue light. An efficient and stable CL broadband emission extending from 300 to 600 nm maximum at 440−525 nm is recorded makes the SiO₂:Ce porous nanophosphor a suitable candidate to fulfil the cyan emission gap of the Field emission displays (FEDs).