Generic packing motifs in vapor-deposited glasses of organic semiconductors

Bagchi, Kushal; Gujral, Ankit; Toney, M. F.; Ediger, M. D.

doi:10.1039/c9sm01155b

Title: Generic packing motifs in vapor-deposited glasses of organic semiconductors

Journal Article · Fri Aug 23 00:00:00 EDT 2019 · Soft Matter

DOI:https://doi.org/10.1039/c9sm01155b· OSTI ID:1576797

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Univ. of Wisconsin, Madison, WI (United States). Dept. of Chemistry
SLAC National Accelerator Lab., Menlo Park, CA (United States). Stanford Synchrotron Radiation Lightsource (SSRL)

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 ~0.8$$T_g$$ (where $$T_g$$ 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.

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Research Organization:: SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States); Univ. of Wisconsin, Madison, WI (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES)

Grant/Contract Number:: AC02-76SF00515; SC0002161

OSTI ID:: 1576797

Alternate ID(s):: OSTI ID: 1568933; OSTI ID: 1605680

Journal Information:: Soft Matter, Vol. 15, Issue 38; ISSN 1744-683X

Publisher:: Royal Society of ChemistryCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 13 works

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