Sunlight into Electricity (IMAGE) University of Oregon Caption Andrew H. Marcus, left, and Mark C. Lonergan, both of the University of Oregon, stand by UO spectroscopy equipment that was adapted to study photon interactions in photocells that used lead-sulfide quantum dots as photoactive semiconductor material. Credit University of Oregon Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.