Bithiophene imide and benzodithiophene copolymers for efficient inverted polymer solar cells

Nanjia Zhou, Xugang Guo, Rocio Ponce Ortiz, Shiqiang Li, Shiming Zhang, Robert P.H. Chang, Antonio Facchetti, Tobin J. Marks

Research output: Contribution to journalArticle

140 Citations (Scopus)

Abstract

Bithiophene imide (BTI) and benzodithiophene (BDT) copolymers are synthesized for application in organic photovoltaic (OPV) cells. The electron deficiency of the BTI units leads to polymers with a low-lying HOMOs (5.6 eV). Inverted solar cells are fabricated to investigate the OPV performance of the BTI-based polymers and achieve power conversion efficiencies up to 5.5%, with substantial V ocs above 0.9 V which are among the highest V ocs reported to date for polymer/PCBM solar cells. The results indicate that the BTI is a promising building block for constructing polymer donors for OPV applications.

Original languageEnglish
Pages (from-to)2242-2248
Number of pages7
JournalAdvanced Materials
Volume24
Issue number17
DOIs
Publication statusPublished - May 2 2012

Keywords

  • donor-acceptor polymers
  • imide-based polymers
  • metal oxides
  • morphology
  • organic photovoltaic cells

ASJC Scopus subject areas

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

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