Role of Solution Structure in Self-Assembly of Conjugated Block Copolymer Thin Films
Abstract
Conjugated block copolymers provide a pathway to achieve thermally stable nanostructured thin films for organic solar cells. We characterized the structural evolution of poly(3-hexylthiophene)-block-poly(diketopyrrolopyrrole–terthiophene) (P3HT-b-DPPT-T) from solution to nanostructured thin films. Aggregation of the DPPT-T block of P3HT-b-DPPT-T was found in solution by small-angle X-ray scattering with the P3HT block remaining well-solvated. The nanostructure in thin films was determined using a combination of wide and small-angle X-ray scattering techniques as a function of processing conditions. The structure in solution controlled the initial nanostructure in spin-cast thin films, allowing subsequent thermal annealing processes to further improve the ordering. In contrast to the results for thin films, nanostructural ordering was not observed in the bulk samples by small-angle X-ray scattering. Finally, these results suggest the importance of controlling solvent induced aggregation in forming nanostructured thin films of conjugated block copolymers.
- Authors:
-
- Univ. of California, Santa Barbara, CA (United States). Materials Dept.
- Univ. of California, Santa Barbara, CA (United States). Dept. of Chemistry and Biochemistry
- SLAC National Accelerator Lab., Menlo Park, CA (United States). Stanford Synchrotron Radiation Lightsource
- North Carolina State Univ., Raleigh, NC (United States). Dept. of Physics
- Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Advanced Light Source
- Univ. of California, Santa Barbara, CA (United States). Materials Dept. Dept. of Chemistry and Biochemistry
- Univ. of California, Santa Barbara, CA (United States). Materials Dept. Dept. of Chemical Engineering
- Publication Date:
- Research Org.:
- Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States); SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES); National Science Foundation (NSF)
- Contributing Org.:
- North Carolina State Univ., Raleigh, NC (United States)
- OSTI Identifier:
- 1377576
- Alternate Identifier(s):
- OSTI ID: 1349415
- Grant/Contract Number:
- AC02-05CH11231; AC02-76SF00515; AC02-98CH10886; DMR 1207549; DMR 1207032; DMR 1121053
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Macromolecules
- Additional Journal Information:
- Journal Volume: 49; Journal Issue: 21; Journal ID: ISSN 0024-9297
- Publisher:
- American Chemical Society
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE; 14 SOLAR ENERGY; 37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; semiconducting polymer; conjugated block copolymer; solution self-assembly; organic photovoltaics; thin film X-ray scattering
Citation Formats
Brady, Michael A., Ku, Sung-Yu, Perez, Louis A., Cochran, Justin E., Schmidt, Kristin, Weiss, Thomas M., Toney, Michael F., Ade, Harald, Hexemer, Alexander, Wang, Cheng, Hawker, Craig J., Kramer, Edward J., and Chabinyc, Michael L. Role of Solution Structure in Self-Assembly of Conjugated Block Copolymer Thin Films. United States: N. p., 2016.
Web. doi:10.1021/acs.macromol.6b01686.
Brady, Michael A., Ku, Sung-Yu, Perez, Louis A., Cochran, Justin E., Schmidt, Kristin, Weiss, Thomas M., Toney, Michael F., Ade, Harald, Hexemer, Alexander, Wang, Cheng, Hawker, Craig J., Kramer, Edward J., & Chabinyc, Michael L. Role of Solution Structure in Self-Assembly of Conjugated Block Copolymer Thin Films. United States. https://doi.org/10.1021/acs.macromol.6b01686
Brady, Michael A., Ku, Sung-Yu, Perez, Louis A., Cochran, Justin E., Schmidt, Kristin, Weiss, Thomas M., Toney, Michael F., Ade, Harald, Hexemer, Alexander, Wang, Cheng, Hawker, Craig J., Kramer, Edward J., and Chabinyc, Michael L. Mon .
"Role of Solution Structure in Self-Assembly of Conjugated Block Copolymer Thin Films". United States. https://doi.org/10.1021/acs.macromol.6b01686. https://www.osti.gov/servlets/purl/1377576.
@article{osti_1377576,
title = {Role of Solution Structure in Self-Assembly of Conjugated Block Copolymer Thin Films},
author = {Brady, Michael A. and Ku, Sung-Yu and Perez, Louis A. and Cochran, Justin E. and Schmidt, Kristin and Weiss, Thomas M. and Toney, Michael F. and Ade, Harald and Hexemer, Alexander and Wang, Cheng and Hawker, Craig J. and Kramer, Edward J. and Chabinyc, Michael L.},
abstractNote = {Conjugated block copolymers provide a pathway to achieve thermally stable nanostructured thin films for organic solar cells. We characterized the structural evolution of poly(3-hexylthiophene)-block-poly(diketopyrrolopyrrole–terthiophene) (P3HT-b-DPPT-T) from solution to nanostructured thin films. Aggregation of the DPPT-T block of P3HT-b-DPPT-T was found in solution by small-angle X-ray scattering with the P3HT block remaining well-solvated. The nanostructure in thin films was determined using a combination of wide and small-angle X-ray scattering techniques as a function of processing conditions. The structure in solution controlled the initial nanostructure in spin-cast thin films, allowing subsequent thermal annealing processes to further improve the ordering. In contrast to the results for thin films, nanostructural ordering was not observed in the bulk samples by small-angle X-ray scattering. Finally, these results suggest the importance of controlling solvent induced aggregation in forming nanostructured thin films of conjugated block copolymers.},
doi = {10.1021/acs.macromol.6b01686},
journal = {Macromolecules},
number = 21,
volume = 49,
place = {United States},
year = {Mon Oct 24 00:00:00 EDT 2016},
month = {Mon Oct 24 00:00:00 EDT 2016}
}
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