Issue 44, 2014

Interpenetrating morphology based on highly crystalline small molecule and PCBM blends

Abstract

We report the morphological characterization of triisopropylsilylethynyl-dibenzochrysene (TIPS-DBC:PCBM) blends, a bulk heterojunction (BHJ) solar cell system based on a highly crystalline small molecule donor. We found that processing the blends from a volatile solvent such as chloroform is beneficial in controlling the crystal size and phase separation of the donor–acceptor phases. When a less-volatile solvent such as chlorobenzene is used, large crystalline domains formed, exceeding the length scale suitable for BHJ solar cells. When the BHJ films are thermally annealed, enhanced domain purity is observed for the chloroform processed thin films, which led to an increased short circuit current in the devices.

Graphical abstract: Interpenetrating morphology based on highly crystalline small molecule and PCBM blends

Supplementary files

Article information

Article type
Paper
Submitted
04 Jul 2014
Accepted
31 Aug 2014
First published
03 Sep 2014

J. Mater. Chem. C, 2014,2, 9368-9374

Author version available

Interpenetrating morphology based on highly crystalline small molecule and PCBM blends

F. Liu, L. Zhang, Y. Zhang, S. C. B. Mannsfeld, T. P. Russell and A. L. Briseno, J. Mater. Chem. C, 2014, 2, 9368 DOI: 10.1039/C4TC01451K

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