Transition metal-free aldol condensation was applied to synthesize n-type conjugated polyelectrolyte (CPE), PIIGBDV-N. The quaternary ammonium groups with Br- ions on the side chain enabled in situ n-doping during polymerization, which resulted in strong polaron absorption in the near infrared region and increased conductivity of the obtained CPE. PIIGBDV-N exhibited good electron transport capability and can be utilized as thickness-insensitive electron transporting layer in high-performance organic solar cell devices.
- Haoran Tang
- Yuejia Dou
- Yong Cao
