Dr. Sudeshna Ray

Our research at the interface of Chemistry and Material Science is focused on the development of Novel Inorganic based Luminescent materials for the application in white Light Emitting Diodes (LEDs) and as Spectral Converters in Solar Cell. The novel materials can be a single composition multi-centred phosphor or near UV/blue excitable blue, green, yellow and red emitting phosphor. The utilization of 'Green' solution based Synthesis Methodology for the precise control of the composition of the phosphors and achievement of a homogenous distribution of small amounts of activators in the host compounds is the main paradigm of our Research. In addition, we are also involved in the “Synthesis, Characterization and Optical studies of size and shape tuned nanocrystalline Y2O3, YVO4 and YPO4 based phosphors”, as well as we are extensively involved into the research for the development of Advanced Luminescence Materials so called ‘Quantum Cutters’ for the application in Solar Cell. A unifying theme of our research is the compositional tuning of the properties of extended solids through solid solution; sometimes referred to as the game of x and y, as, for example, in Sr2(1-x-y/2)Eu2xLaySi1-yAlyO4. Moreover, Design of Persistent Phosphors for the fabrication of Glow Ammunition and development of Pyrophoric Materials for the fabrication of Smart Flare to countermeasure the IR-tracking missile for National Security constitute another significant part of our Research.