Allen M. Barnett (born June 20, 1940) was a research professor of electrical engineering at the University of Delaware. He was the principal investigator of the DARPA-funded Consortium for Very High Efficiency Solar cells. Barnett was the founder and CEO of solar-cell producer Astropower, Inc. He was also a Professor of Advanced Photovoltaics at the University of New South Wales (UNSW) School of Photovoltaic and Renewable Energy Engineering (SPREE) in Sydney Australia.