Interpenetrating morphology based on highly crystalline small molecule and PCBM blends

Research output: Contribution to journalResearch articleContributedpeer-review

Contributors

  • Feng Liu - , University of Massachusetts (Author)
  • Lei Zhang - , University of Massachusetts (Author)
  • Yue Zhang - , University of Massachusetts (Author)
  • Stefan C.B. Mannsfeld - , Chair of Organic Devices (cfaed) (Author)
  • Thomas P. Russell - , University of Massachusetts (Author)
  • Alejandro L. Briseno - , University of Massachusetts (Author)

Abstract

We report the morphological characterization of triisopropylsilylethynyl-dibenzochrysene (TIPS-DBC:PCBM) blends, a bulk heterojunction (BHJ) solar cell system based on a highly crystalline small molecule donor. We found that processing the blends from a volatile solvent such as chloroform is beneficial in controlling the crystal size and phase separation of the donor-acceptor phases. When a less-volatile solvent such as chlorobenzene is used, large crystalline domains formed, exceeding the length scale suitable for BHJ solar cells. When the BHJ films are thermally annealed, enhanced domain purity is observed for the chloroform processed thin films, which led to an increased short circuit current in the devices. This journal is

Details

Original languageEnglish
Pages (from-to)9368-9374
Number of pages7
JournalJournal of Materials Chemistry. C, Materials for optical and electronic devices
Volume2
Issue number44
Publication statusPublished - 28 Nov 2014
Peer-reviewedYes