| dc.description.abstract | Various organic optoelectronic materials were newly synthesized and characterized for the applications in organic photovoltaic cells (OPVs) and perovskite solar cells (PSCs).
At first, central cyclopentadithiophene (CDT) unit was coupled with two different π-spacers, 2-hexylthienothiophene (TT) and 2,3-bis(4-(octyloxy)phenyl)thieno[3,4-b]pyrazine (TP) to give conjugated TT-CDT and TP-CDT moieties. Then, the latter were end-capped with electron-withdrawing groups, such as dicyanomethylene indanone (IN), dichlorodicyanomethylene indanone (INCl), and dicyanovinyl (DCV), yielding four final compounds, IN-TTCDT-b8 (1), INCl
-TT-CDT-b8 (2), DCV-TT-CDT-b8 (3) and DCV-TP-CDTb8 (4), respectively. In addition to the application in OPVs, these newly developed non-fullerene acceptors could also be used as passivating agents in PSCs based on our recent studies.
Further, D-π-A based new hole-transporting materials, TP-CA (5) and TPMN (6), were developed for application in Sn-PSCs.
The optical and electrochemical properties of these newly developed compounds were characterized by UV-vis spectroscopy and DPV. Chemical structures were characterized by 1H NMR, 13C NMR and mass spectrometry. Thermal properties were investigated by DSC and TGA. At present,
optoelectronic devices based on these new non-fullerene acceptors and hole
transporting materials are under optimization. | en_US |