Sometimes it's possible to get a handle on the world's biggest problems by thinking creatively on a very small scale—and advances in the rapidly maturing field of nanoelectronics prove it. Innovations that hold promise for broader and faster adoption of renewable energy technologies loom large against a backdrop of population growth, rapid industrialization in developing countries, and initiatives to decrease reliance on both fossil fuels and nuclear power. In this symposium, researchers from the U.S. and Europe will review the latest progress in nanoelectronics for renewable energy across a series of interrelated programs. For instance, new manufacturing approaches such as nanoimprinting, nanotransfer, and spray-on fabrication of organic semiconductors not only point the way toward low-cost production of large-scale electronics such as solar panels, they also enable and inspire novel nanoelectronic device designs. These device-level innovations range from ultrasensitive molecular sensors to nanomagnet logic circuits, and they are of particular interest in solar energy applications. Many lines of research appear to be converging on nanostructure-based solar cells that will be vastly more efficient in capturing sunlight (or even heat) and converting it to electrical power. In addition to outlining these promising paths toward higher-efficiency, lower-cost photovoltaics, the symposium will highlight some of the remaining hurdles, including needed advances in fundamental science.