Issue 20, 2014

Two-dimensional benzodithiophene and benzothiadiazole based solution-processed small molecular organic field-effect transistors & solar cells

Abstract

Benzodithiophene (BDT) and benzothiadiazole (BT) based small molecules have been synthesized through palladium-catalyzed Stille coupling reactions. The molecules with and without the conjugated thiophene side-chain were named as DRTBTTBDTT (2D) and DRTBTTBDT (1D), respectively. These molecules exhibited an optical band gap of around 1.8 eV. Solution-processed thin films of 1D and 2D showed that the conjugated thiophene side-chain oriented to produce a uniform 2D structure, which led to a relatively high hole mobility of 0.016 cm2 V−1 s−1, and this was one of the highest values for solution-processed small-molecule donors in organic solar cells (OSCs). With proper engineering of energy levels, the organic solar cells based on DRTBTTBDTT (2D) as donors exhibited a high Voc of around 0.9 V.

Graphical abstract: Two-dimensional benzodithiophene and benzothiadiazole based solution-processed small molecular organic field-effect transistors & solar cells

Article information

Article type
Paper
Submitted
14 Jan 2014
Accepted
01 Mar 2014
First published
04 Mar 2014

J. Mater. Chem. C, 2014,2, 3921-3927

Two-dimensional benzodithiophene and benzothiadiazole based solution-processed small molecular organic field-effect transistors & solar cells

Y. Chen, Y. Yan, Z. Du, X. Bao, Q. Liu, V. A. L. Roy, M. Sun, R. Yang and C. S. Lee, J. Mater. Chem. C, 2014, 2, 3921 DOI: 10.1039/C4TC00086B

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