Jump to main content
Jump to site search

Issue 21, 2017
Previous Article Next Article

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

Article information


Submitted
15 Feb 2017
Accepted
28 Apr 2017
First published
04 May 2017

J. Mater. Chem. C, 2017,5, 5143-5153
Article type
Paper

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, 5, 5143
DOI: 10.1039/C7TC00711F

Social activity

Search articles by author

Spotlight

Advertisements