Manipulation and statistical analysis of the fluid flow of polymer semiconductor solutions during meniscus-guided coating
- Stanford Univ., CA (United States)
- Univ. of Illinois at Urbana-Champaign, IL (United States)
- SLAC National Accelerator Lab., Menlo Park, CA (United States). Stanford Synchrotron Radiation Lightsource (SSRL)
- BASF Schweiz AG, Schweizerhalle (Switzerland)
- Georg-August-Universität Göttingen (Germany)
- BASF SE, Ludwigshafen (Germany)
- Univ. of Colorado, Boulder, CO (United States)
Recent work in structure–processing relationships of polymer semiconductors have demonstrated the versatility and control of thin-film microstructure offered by meniscus-guided coating (MGC) techniques. We analyze the qualitative and quantitative aspects of solution shearing, a model MGC method, using coating blades augmented with arrays of pillars. The pillars induce local regions of high strain rates—both shear and extensional—not otherwise possible with unmodified blades, and we use fluid mechanical simulations to model and study a variety of pillar spacings and densities. We then perform a statistical analysis of 130 simulation variables to find correlations with three dependent variables of interest: thin-film degree of crystallinity and transistor field-effect mobilities for charge-transport parallel (Μpara) and perpendicular (Μperp) to the coating direction. Our study suggests that simple fluid mechanical models can reproduce substantive correlations between the induced fluid flow and important performance metrics, providing a methodology for optimizing blade design.
- Research Organization:
- SLAC National Accelerator Lab., Menlo Park, CA (United States); Stanford Univ., CA (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Basic Energy Sciences (BES). Materials Sciences & Engineering Division; National Science Foundation (NSF)
- Grant/Contract Number:
- AC02-76SF00515; ECCS-1542152; SC0016523
- OSTI ID:
- 1777180
- Alternate ID(s):
- OSTI ID: 1782814
- Journal Information:
- MRS Bulletin, Vol. 46, Issue 5; ISSN 0883-7694
- Publisher:
- Materials Research SocietyCopyright Statement
- Country of Publication:
- United States
- Language:
- English
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