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- Title
New Fused Pyrrolopyridine‐Based Copolymers for Organic Solar Cell.
- Authors
Lee, Gyeong Seok; Shin, Hee Jeong; Lee, Sang‐Bong; Choi, Hyosung; Kim, Yun‐Hi
- Abstract
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. A novel building block, a fused pyrrolo[2,3‐b]pyridine, is developed for various organic electronics applications. The nitrogen atom instead of carbon atom of the indoloindole moiety has the advantages of decreased band‐gap and deep highest‐occupied molecular orbital level.
- Subjects
DYE-sensitized solar cells; SOLAR cells; COPOLYMERS
- Publication
Macromolecular Rapid Communications, 2019, Vol 40, Issue 6, pN.PAG
- ISSN
1022-1336
- Publication type
Article
- DOI
10.1002/marc.201800784