I am interested in scientific understanding of the charge and spin transport and photophysics of organic semiconductors, other carbon-based semiconductors as well as low-temperature processible hybrid organic-inorganic semiconductors. Organic semiconductors show a rich variety of transport phenomena which are not exhibited by conventional inorganic semiconductors such as silicon. Understanding of transport on the molecular scale requires sophisticated experimental techniques, and we have developed a broad range of electrical transport, optical spectroscopy, and scanning probe techniques to characterize these processes. We are also interested in applications of these materials in flexible electronics, spintronics as well as energy devices, in particular, thermoelectric waste heat conversion. The unique physics of molecular materials opens up new physical approaches for harvesting thermal energy and converting it into useful electricity.