Journal
MACROMOLECULES
Volume 50, Issue 13, Pages 4942-4951Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.macromol.7b00377
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Funding
- Australian Renewable Energy Agency within the Australian Centre for Advanced Photovoltaics
- German Academic Exchange Service (DAAD)
- ARC LIEF Grant [LE110100161]
- Director, Office of Science, Office of Basic Energy Sciences, of the U.S. Department of Energy [DE-AC02-05CH11231]
- International Synchrotron Access Program (ISAP)
- Australian Government
- Bavarian framework program Soltech
- Australian Research Council [LE110100161] Funding Source: Australian Research Council
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We report the morphological and photovoltaic evaluation of a novel fully conjugated donor/acceptor block copolymer system based on the P3HT-b-PFTBT scaffold. The incorporation of hydrophilic tetraethylene glycol side-chains into the PFTBT acceptor block generates an amphiphilic species whose properties provide demonstrable benefits over traditional systems. This design strategy facilitates isolation of the block copolymer from homopolymer impurities present in the reaction mixture, and we show that this purification leads to better defined morphologies. The chemical disparity introduced between donor and acceptor blocks causes spontaneous microphase separation into well-defined domains, which we demonstrate with a combination of spectroscopy, microscopy, and X-ray scattering. The morphological advantages of this system are significant; however, preliminary device characterization indicates a loss of electron mobility in the hydrophilic acceptor block.
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