Controlling the Solidification of Organic Photovoltaic Blends with Nucleating Agents

Jennifer A. Nekuda Malik, Neil D. Treat, Maged Abdelsamie, Liyang Yu, Ruipeng Li, Detlef-M. Smilgies, Aram Amassian, Craig J. Hawker, Michael L. Chabinyc, Natalie Stingelin

Research output: Contribution to journalArticlepeer-review

Abstract

Blending fullerenes with a donor polymer for the fabrication of organic solar cells often leads to at least partial vitrification of one, if not both, components. For prototypical poly(3-hexylthiophene):fullerene blend, we show that the addition of a commercial nucleating agent, di(3,4-dimethyl benzylidene)sorbitol, to such binary blends accelerates the crystallization of the donor, resulting in an increase in its degree of crystallinity in as-cast structures. This allows manipulation of the extent of intermixing/ phase separation of the donor and acceptor directly from solution, offering a tool to improve device characteristics such as power conversion efficiency.
Original languageEnglish (US)
JournalOrganic Photonics and Photovoltaics
Volume2
Issue number1
DOIs
StatePublished - Dec 12 2014

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