New Fused Pyrrolopyridine-Based Copolymers for Organic Solar Cell

Macromol Rapid Commun. 2019 Mar;40(6):e1800784. doi: 10.1002/marc.201800784. Epub 2018 Dec 21.

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.

Keywords: fused pyrrolopyridine; organic solar cells; power conversion efficiency.

MeSH terms

  • Electric Power Supplies*
  • Molecular Structure
  • Polymers / chemical synthesis
  • Polymers / chemistry*
  • Pyrimidines / chemistry*
  • Pyrroles / chemistry*
  • Solar Energy*

Substances

  • Polymers
  • Pyrimidines
  • Pyrroles
  • pyrrolopyrimidine