Structure & <i>J-V</i> (IMAGE) National Institutes of Natural Sciences Caption Fig. 1 (a) Chemical structure of tetrasubstituted PDI. (b) <i>J-V</i> curves of OSCs with tetrasubstituted PDI and reference compound. Credit NINS/IMS 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.