Current research efforts are growth and characterization of thin film semiconductors and devices for photovoltaic applications as well as the development of a-Si/c-Si heterojunction all back contact solar cells. The research emphasizes the inter-relationship between the growth process, film structural and electro-optical properties and device performance. He is also actively involved in developing effective mechanisms to transfer laboratory results to commercial processes with particular emphasis on implementing model-based process control schemes using advanced sensor technologies.