| 초록 |
Two types of indenofluorene-based low bandgap conjugated polymers, poly(6,6',12,12'-tetraoctylindeno[1,2-b]fluorene-co-4,7-bis(2-thienyl)-2,1,3-benzothiadiazole) (PIF-DBT) and poly(6,6',12,12'-tetraoctylindeno[1,2-b]fluorene-co-5,7-dithien-2-yl-thieno[3,4-b]pyrazine) (PIF-DTP), were synthesized and characterized for use in plastic solar cells. The optical, electrochemical, field effect hole mobility, morphological and photovoltaic characteristics were investigated. These polymers could harvest the broad solar spectrum covering from 300 nm to 650 nm (PIF-DBT), and from 300 nm to 800 nm (PIF-DTP) in film. Among the polyindenofluorene copolymers, PIF-DBT50 (containing 50 mol% DBT) showed the best photovoltaic performance with an open circuit voltage of 0.77 V, a short circuit current of 5.50 mA/cm2 and a power conversion efficiency of 1.70% |
