PBDB-T (IMAGE) Science China Press Caption The chemical structures of electron donor PBDB-T and fluorinated NFA INPIC-4F; the J-V characteristics of PBDB-T:INPIC-4F solar cells cast from different solvents; the AFM images of PBDB-T:INPIC-4F surfaces cast from CB and CB:CF. Credit ©Science China Press Usage Restrictions Use with credit. 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.