Present century is the era of nanotechnology with its exciting and versatile field of applications towards mankind. In unison, over the past decades, nanophosphors have been extensively investigated due to its enormous application potential for various high-performance novel displays devices, in non-linear optics and also in fast optical switching. Consistently, discovery of many rare earth materials played a prominent role to develop highly efficient luminescence materials. Surprisingly enough, intentional doping of these impurities (rare earth ions) in quantum confined (nanomaterial) regime...