Rubrene Transistor (IMAGE) Rutgers University Caption An organic single-crystal transistor made out of rubrene (red crystal). This is an optoelectronic device similar to those used by Rutgers physicists to measure exciton diffusion, as reported in a paper posted by the journal Nature Materials. Credit Rutgers University Usage Restrictions Permission is granted to reproduce the image in connection with news coverage of this story. All other rights are reserved. 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.