Display options
Cite
Manley EF, Strzalka J, Fauvell TJ, et al. In Situ GIWAXS Analysis of Solvent and Additive Effects on PTB7 Thin Film Microstructure Evolution during Spin Coating. Adv Mater. 2017;29(43)doi: 10.1002/adma.201703933.
Manley, E. F., Strzalka, J., Fauvell, T. J., Jackson, N. E., Leonardi, M. J., Eastham, N. D., Marks, T. J., & Chen, L. X. (2017). In Situ GIWAXS Analysis of Solvent and Additive Effects on PTB7 Thin Film Microstructure Evolution during Spin Coating. Advanced materials (Deerfield Beach, Fla.), 29(43), . https://doi.org/10.1002/adma.201703933
Manley, Eric F, et al. "In Situ GIWAXS Analysis of Solvent and Additive Effects on PTB7 Thin Film Microstructure Evolution during Spin Coating." Advanced materials (Deerfield Beach, Fla.) vol. 29,43 (2017). doi: https://doi.org/10.1002/adma.201703933
Manley EF, Strzalka J, Fauvell TJ, Jackson NE, Leonardi MJ, Eastham ND, Marks TJ, Chen LX. In Situ GIWAXS Analysis of Solvent and Additive Effects on PTB7 Thin Film Microstructure Evolution during Spin Coating. Adv Mater. 2017 Nov;29(43). doi: 10.1002/adma.201703933. Epub 2017 Oct 09. PMID: 28990271.
Copy Download .nbib Format: NLM
Share it on

Adv Mater. 2017 Nov;29(43). doi: 10.1002/adma.201703933. Epub 2017 Oct 09.

In Situ GIWAXS Analysis of Solvent and Additive Effects on PTB7 Thin Film Microstructure Evolution during Spin Coating.

Advanced materials (Deerfield Beach, Fla.)

Eric F Manley, Joseph Strzalka, Thomas J Fauvell, Nicholas E Jackson, Matthew J Leonardi, Nicholas D Eastham, Tobin J Marks, Lin X Chen

Affiliations

  1. Department of Chemistry and the Argonne-Northwestern Solar Energy Research (ANSER) Center, Northwestern University, 2145 Sheridan Road, Evanston, IL, 60208, USA.
  2. Chemical Sciences and Engineering Division, Argonne National Laboratory, 9700 South Cass Avenue, Lemont, IL, 60439, USA.
  3. X-ray Science Division, Argonne National Laboratory, Lemont, IL, 60439, USA.

PMID: 28990271 DOI: 10.1002/adma.201703933

Abstract

The influence of solvent and processing additives on the pathways and rates of crystalline morphology formation for spin-coated semiconducting PTB7 (poly[[4,8-bis[(2-ethylhexyl)oxy]benzo[1,2-b:4,5-b']dithiophene-2,6-diyl][3-fluoro-2-[(2-ethylhexyl)-carbonyl]-thieno[3,4-b]thiophenediyl]]) thin films is investigated by in situ grazing incidence wide-angle X-ray scattering (GIWAXS) and optical reflectance, to better understand polymer solar cell (PSC) optimization approaches. In situ characterization of PTB7 film formation from chloroform (CF), chlorobenzene (CB), and 1,2-dichlorobenzene (DCB) solutions, as well as CB solutions with 1% and 3% v/v of the processing additives 1-chloronapthalene (CN), diphenylether (DPE), and 1,8-diiodooctane (DIO), reveals multiple crystallization pathways with: (i) single-solvent systems exhibiting rapid (<3 s) crystallization after a solvent boiling point-dependent film thinning transition, (ii) solvent + additive systems exhibiting different crystallization pathways and crystallite formation times from minutes (CN, DPE) to 1.5 h (DIO). Identifying crystalline intermediates has implications for bulk-heterojunction PSC morphology optimization via optimized spin-casting processes.

© 2017 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

Keywords: PTB7; additives; in situ GIWAXS; organic photovoltaics; spin coating

Publication Types