short and sweet episode. I've heard the word "perovskite", but the difference in cost is a real leap

NASACast Audio: Small Steps, Giant Leaps: Episode 107: Perovskite Solar Cells

Episode webpage: http://www.nasa.gov/mediacast/small-steps-giant-leaps-episode-107-perovskite-solar-cells

Media file: http://www.nasa.gov/sites/default/files/atoms/audio/episode-107-perovskite-solar-cells.mp3