Parameswar Hari, Ph.D. Professor of physics. Director of the Oklahoma Photovoltaic Research Institute. College of Engineering & Natural Sciences. Physics and engineering physics. Keplinger Hall, 1265. The University of Tulsa. Tulsa, Ok. 74104. Dr. Parameswar is interested in solar cell fabrication, modeling materials, solar cell characterization, and the fabrication of novel nanomaterials and nanodevices.