The research activity of D.D. is directed towards the evaluation and design of materials for the development of optical/ electrochemical devices such as electrochromic windows, current/potential based sensors, displays, high-power sources, light emitting electrochemical cells, nonlinear optical filters, optical limiters, solar energy conversion
electrochemical cells and fuel generation from sunlight conversion. Since 2008 D.D. has undertaken the study of the electrochemistry of dye-sensitised semiconducting oxides with nanofeatures for the realization of photoelectrocatalytic devices based on the working principle of the Grätzel cell, which involve photoinduced reduction processes.