Local Field Enhancement-Induced Enriched Cathodoluminescence Behavior from Cul-RGO Nanophosphor Composite for Field-Emission Display Applications

Field-emission displays (FEDs) constitute one of the major foci of the cutting edge materials research because of the increasingly escalating demand for high-resolution display panels. However, poor efficiencies of the concurrent low voltage cathodoluminescence (CL) phosphors have created a serious bottleneck in the commercialization of such devices. Herein we report a novel cuI-RGO composite nanophosphor that exhibits-bright red :emission under low voltage electron beam excitation. Quantitative assessment of CL-spectra reveals that cuI-RGO nanocoMposite phosphor leads to,the 4-fold enhancement in the CL intensity as compared to the pristine atI counterpart. Addition of RGO in the-Cul matrix facilitates efficient triggering of luminescence centers thatare.activated by local-electric.field enhancement at the CuI-RGO contact points. In addition, conducting RGO also reduces-the negative loading problem on the surfaCe of the nanophosphor composite. The concept presented here op-ens up a novel generic route for enhancing CL intensity of the existing (nano)phosphors as well as 'validates the bright prospects of the CuI,RGO composite nanophosphor in this rapidly growing field.