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

54 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 2013

Bibliographical note

Funding Information:
The authors gratefully acknowledge the support of the Cluster of Excellence “Engineering of Advanced Materials” at the University of Erlangen-Nuremberg, which is funded by the German Research Foundation (DFG) within the framework of its “Excellence Initiative”. This work has been partially funded by the DFG project, Grant No. BR 4031/2-1, the Russian Ministry of Education and Science (GK No. 11.519.11.6020), The Program of President of Russian Federation for Support of Young Scientists (Grant МК-1567.2011.3) and the China Scholarship Council (CSC).

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

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