Photophysics of fluorescent molecules and their application in the study of microenvironments
We have studied various classes of molecules: porphyrins, benzimidazoles, aminoquinolenes and most recently, Schiff bases.
Ultrafast processes in silica nanoparticles and dye-silica nanoconjugates
The blue photoluminescence of silica nanostructures has ben assigned to the interplay of a defect pair and other emissive trap states. The trapping process has been found to be responsive to simple chemical inputs like organic solvents. It is favored strongly by mineral acids
Excited state dynamics for photovoltaic applications
Graphene quantum dots, semiconductor quantum dots, perovskites and conjugated polymers have potential photovoltaic applications. The initial processes taking place in these systems are of utmost importance in this regard. We have initiated the study of these systems using ultrafast trasnient absorption and photoluminescence techniques.