Generic packing motifs in vapor-deposited glasses of organic semiconductors.

We study the structure of vapor-deposited glasses of five common organic semiconductors as a function of substrate temperature during deposition, using synchrotron X-ray scattering. For deposition at a substrate temperature of ∼0.8Tg (where Tg is the glass transition temperature), we find a generic tendency towards "face-on" packing in glasses of anisotropic molecules. At higher substrate temperature however this generic behavior breaks down; glasses of rod-shaped molecules exhibit a more pronounced tendency for end-on packing. Our study provides guidelines to create face-on and end-on packing motifs in organic glasses, which can promote efficient charge transport in OLED and OFET devices respectively.

• Publication year

  2019

• Venue

  Soft Matter

• Publication date

  2019-10-02

• Fields of study

  Medicine, Materials Science, Physics

• Identifiers
  DOI 10.1039/c9sm01155bPMID 31468038
• External record

  Open on Semantic Scholar

• Source metadata

  Semantic Scholar, PubMed

• No claims are published for this paper.

• No concepts are published for this paper.

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