Infrared Light Emission (IMAGE) Penn State Caption A plot of the wavelength of emitted infrared light vs. the time delay of the light emission provides information about the path of an electron within a plastic solar cell. This information about how the cell makes an electric current from light will lead to improvements in the efficiency and usable lifetime of solar cells. Credit Penn State 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.