Dr. Rohatgi received the B.S. (E.E.) degree from Indian Institute of Technology in 1971, the M.S. (Materials Engineering) from Virginia Polytechnic Institute and State University in 1973, and the Ph.D. in Metallurgy and Materials Science from Lehigh University in 1977.
He joined the Westinghouse Research and Development Center in Pittsburgh, Pennsylvania in 1977 and became a Westinghouse Fellow while working on the science and technology of photovoltaic and microelectronic devices.
Dr. Rohatgi joined the ECE faculty at Georgia Tech in 1985 and started a program on photovoltaics, which has become one of the best in the country. He has become an internationally recognized leader in photovoltaics. He is the founding director of the first university-based DOE http://www.ece.gatech.edu/research/UCEP">Center of Excellence in Photovoltaic Research and Education. He is the author of more than 300 publications and holds 10 U.S. patents. Dr. Rohatgi has received numerous awards and distinctions from professional societies and Georgia Tech. He is the founder and CTO for http://www.suniva.com/team.php">Suniva.
- Ph.D., Metallurgy & Materials Science, Lehigh University, 1977
- M.S., Materials Engineering, Virginia Tech, 1973
- B.S., Electrical Engineering, IIT Kanpur, 1971
Dr. Rohatgi has conducted research in the areas of optical and electrical properties of semiconductors, gettering and passivation of impurities and defects in Silicon, modeling design and fabrication of low-cost high-efficiency solar cells on monocrystalline, multicrystalline, and ribbon silicon. Dr. Rohatgi is currently working on next generation carrier selective tunnel oxide passivating contact (TOPCon) technologies and novel cost-effective screen-printed metallization that can lead to greater than 27% efficiency low-cost silicon solar cells and more than 35% efficient silicon-perovskite tandem cells to drive the cost of PV electricity well below fossil fuels. Dr. Rohatgi’s industry relevant research led to the establishment of the nation’s first University Center of Excellence (UCEP) in PV at Georgia Tech, followed by the foundation of Suniva Inc.
Professor Rohatgi's teaching interests include fundamental and advanced topics in electronic devices, solar cells, circuits, and semiconductor technology at both undergraduate and graduate levels. His instruction emphasizes solid-state electronics, device physics, and integrated circuit fabrication and design. Professor Rohatgi is committed to fostering student engagement and integrating research insights into coursework to prepare students for challenges in microelectronics, photovoltaics, and related fields.
- Westinghouse Fellow
- Fellow of the Institute of Electrical and Electronics Engineers
- Georgia Tech Distinguished Professor Award
- William Cherry Award from the IEEE Photovoltaic Specialists Conference
- Thomas D. Callinan Award from the Electrochemical Society
- Rappaport Award from the U.S. Department of Energy/NREL
- Founding Director, University Center of Excellence in Photovoltaics Research and Education (a U.S. DoE-funded center)
- Rear junction bifacial poly‑Si/SiOx passivated contact solar cells…, US Patent App. 18/870,171, 2025.
- R Zhong et al., High Efficiency Screen‑Printed Ag‑Free PERC Solar Cell…, IEEE JPV, 2025.
- WJ Choi et al., 22.5% p‑type TOPCon solar cells…, Solar Energy Materials and Solar Cells, 2025.
- WJ Choi et al., APCVD BSG and POCl₃ Codiffusion Process…, IEEE JPV, 2024.
- A Rohatgi et al., 26.7% Efficient 4‑Terminal Perovskite–Silicon Tandem Solar Cell…, IEEE JPV, 2020.