A solution-processable star-shaped molecule for high-performance organic solar cells via alkyl chain engineering and solvent additive

Jie Min*, Yuriy N. Luponosov, Tayebeh Ameri, Andreas Elschner, Svetlana M. Peregudova, Derya Baran, Thomas Heumüller, Ning Li, Florian MacHui, Sergei Ponomarenko, Christoph J. Brabec

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

50 Scopus citations

Abstract

A new star-shaped D-π-A molecule, tris{4-[5′′-(1,1- dicyanobut-1-en-2-yl)-2,2′-bithiophen-5-yl]phenyl}amine N(Ph-2T-DCN-Et)3, with high efficiency potential for photovoltaic applications was synthesized. As compared to its analogue S(TPA-bT-DCN), it showed stronger absorption in the region of 350-450 nm and a lower lying highest occupied molecular energy level (HOMO). Solution-processed organic solar cells (OSCs) based on a blend of N(Ph-2T-DCN-Et)3 and PC70BM resulted in a high PCE of 3.1% without any post-treatment. The PCE of N(Ph-2T-DCN-Et)3 based solar cells was further improved to 3.6% under simulated AM 1.5 by addition of a new additive 4-bromoanisole (BrAni).

Original languageEnglish (US)
Pages (from-to)219-229
Number of pages11
JournalOrganic Electronics
Volume14
Issue number1
DOIs
StatePublished - Jan 1 2013

Keywords

  • 4-Bromoanisole (BrAni)
  • D-π-A molecule
  • Highest occupied molecular energy level
  • Organic solar cells (OSCs)

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Biomaterials
  • Chemistry(all)
  • Condensed Matter Physics
  • Materials Chemistry
  • Electrical and Electronic Engineering

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