Abstract

Presently lighting constitutes 20 percent of total energy consumption worldwide. The fossil fuel industry consumes large amount of natural resources to produce energy but a major amount is wasted due to inefficient devices. It is supposed that pioneered use of LED lighting will provide a cheaper source of lighting to people. Also it will result in reduced carbon dioxide emission and less deforestation. Luminescence is one of the fundamental mechanisms contributing to solid state lighting devices and nano photonics. In the present abstract, calcium diphosphate phosphor doped with Cerium and capped with sodium hexametaphosphate has been reported. Studies revealed that Ca2P2O7 crystallizes in tetragonal group with square anti prism symmetry. The crystal structure arrangement was found to be non linear in nature with two PO3 groups linked by bridging oxygen forming the diphosphate group. Transmission electron microscopy observations explored nano structural features of the synthesized nano phosphor compound. A study involving SAED and HRTEM on isolated particles was carried out to validate the stabilization of the tetragonal phase. Optical properties were examined by evaluating the photoluminescence excitation and emission spectra. Broad emission peaks were observed around 326nm and 347nm because of 4f-5d transitions of rare earth activator Ce3 . A lifetime calculation for the nano phosphor indicates that the aforementioned compound has promising potential for solid state lighting and photonic applications