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Transient phases during fast crystallization of organic thin films from solution

APL Materials, ISSN: 2166-532X, Vol: 4, Issue: 1
2016
  • 20
    Citations
  • 0
    Usage
  • 44
    Captures
  • 0
    Mentions
  • 0
    Social Media
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Metrics Details

  • Citations
    20
    • Citation Indexes
      20
  • Captures
    44

Article Description

We report an in situ microbeam grazing incidence X-ray scattering study of 2,7-dioctyl[1]benzothieno[3,2-b][1]benzothiophene (C-BTBT) organic semiconductor thin film deposition by hollow pen writing. Multiple transient phases are observed during the crystallization for substrate temperatures up to 93 °C. The layered smectic liquid-crystalline phase of C-BTBT initially forms and preceedes inter-layer ordering, followed by a transient crystalline phase for temperature >60 °C, and ultimately the stable phase. Based on these results, we demonstrate a method to produce extremely large grain size and high carrier mobility during high-speed processing. For high writing speed (25 mm/s), mobility up to 3.0 cm/V-s has been observed.

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