A hyperbranched conjugated polymer as the cathode interlayer for high-performance polymer solar cells

Adv Mater. 2013 Dec 17;25(47):6889-94. doi: 10.1002/adma.201302726. Epub 2013 Oct 7.

Abstract

An alcohol-soluble hyperbranched conjugated polymer HBPFN with a dimethylamino moiety is synthesized and used as a cathode interlayer. A PCE of 7.7% is obtained for PBDTTT-C-T/PC71 BM based solar cells. No obvious interfacial dipole is found at the interface between the active layer and HBPFN however, an interfacial dipole with the cathode could be one of the reasons for the enhanced performance.

Keywords: cathode interlayer; hyperbranched polymer; polymer solar cells; scanning kelvin probe.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Electric Power Supplies
  • Electrodes
  • Fluorenes / chemistry
  • Polymers / chemistry*
  • Polystyrenes / chemistry
  • Quantum Theory
  • Solar Energy*
  • Thiophenes / chemistry

Substances

  • Fluorenes
  • Polymers
  • Polystyrenes
  • Thiophenes
  • poly(3,4-ethylenedioxythiophene)-poly(styrenesulfonate)