1 In, 2 Out for Solar Power (image) University of California - Davis Share Print E-Mail Caption Computer simulations show that when a light particle (blue wave on left) hits a crystal of a high-pressure form of silicon, it releases two electron-hole pairs (red circles/green rings), which generate electric current. Credit Stefan Wippermann/UC Davis. Usage Restrictions May be used with acknowledgement of the source. Share Print E-Mail 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.