Journal
MACROMOLECULAR RAPID COMMUNICATIONS
Volume 40, Issue 6, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/marc.201800784
Keywords
fused pyrrolopyridine; organic solar cells; power conversion efficiency
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Funding
- National Research Foundation of Korea (NRF) - Korea government (MSIP) [2018R1A2A1A05078734, NRF-2018R1C1B6001015]
- Technology Development Program to Solve Climate Changes of the National Research Foundation (NRF) - Ministry of Science, ICT and Future Planning [NRF-2016M1A2A2940911, 2016M1A2A2940914]
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A fused pyrrolopyridine core having substituents on the nitrogen atom instead of the carbon atom of the indoloindole unit is developed as a new donor unit for organic electronics. The new donor-acceptor copolymers, PDHPHBT, PDHPFBT, and PDHP2FBT, are synthesized using the new donor unit, well-known benzothiadiazole derivatives containing fluorine atoms as the acceptor. The thermal, optical, and electrochemical properties of these novel copolymers are reported. A solar cell using PDHPFBT with diphenyl ether has an open-circuit voltage, short-circuit current, fill factor, and power conversion efficiency of 0.86 V, 11.32 mA cm(-2), 0.59%, and 5.68%, respectively, under AM 1.5G illumination (100 mW cm(-2)) in the absence of annealing.
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