Jump to main content
Jump to site search


New 3,3′-(ethane-1,2-diylidene)bis(indolin-2-one) (EBI)-based small molecule semiconductors for organic solar cells

Author affiliations

Abstract

A series of new donor–acceptor–donor (D–A–D) small-molecule compounds, with 3,3′-(ethane-1,2-diylidene)bis(indolin-2-one) (EBI) as an electron acceptor building block coupled with various electron donor end-capping moieties (thiophene, bithiophene and benzofuran), were synthesized and characterized. When the fused-ring benzofuran is combined to EBI (EBI-BF), the molecules displayed a perfectly planar conformation and afforded the best charge transport properties among these EBI compounds with a hole mobility of up to 0.02 cm2 V−1 s−1. All EBI-based small molecules were used as donor material along with a PC61BM acceptor for the fabrication of solution-processed bulk-heterojunction (BHJ) solar cells. The best performing photovoltaic devices are based on the EBI derivative using the bithiophene end-capping moiety (EBI-2T) with a maximum power conversion efficiency (PCE) of 1.92%, owing to the broad absorption spectra of EBI-2T and the appropriate morphology of the BHJ. With the aim of establishing a correlation between the molecular structure and the thin film morphology, differential scanning calorimetry, atomic force microscopy and X-ray diffraction analysis were performed on neat and blend films of each material.

Graphical abstract: New 3,3′-(ethane-1,2-diylidene)bis(indolin-2-one) (EBI)-based small molecule semiconductors for organic solar cells

Back to tab navigation
Please wait while Download options loads

Publication details

The article was received on 15 Feb 2017, accepted on 28 Apr 2017 and first published on 04 May 2017


Article type: Paper
DOI: 10.1039/C7TC00711F
Citation: J. Mater. Chem. C, 2017, Advance Article
  •   Request permissions

    New 3,3′-(ethane-1,2-diylidene)bis(indolin-2-one) (EBI)-based small molecule semiconductors for organic solar cells

    M. Le Borgne, J. Quinn, J. Martin, N. Stingelin, Y. Li and G. Wantz, J. Mater. Chem. C, 2017, Advance Article , DOI: 10.1039/C7TC00711F

Search articles by author