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

Abstract

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.

Authors:
ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [2]; ORCiD logo [1]
  1. Univ. of Wisconsin, Madison, WI (United States). Dept. of Chemistry
  2. SLAC National Accelerator Lab., Menlo Park, CA (United States). Stanford Synchrotron Radiation Lightsource (SSRL)
Publication Date:
Research Org.:
SLAC National Accelerator Lab., Menlo Park, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1576797
Alternate Identifier(s):
OSTI ID: 1568933
Grant/Contract Number:  
AC02-76SF00515; SC0002161
Resource Type:
Accepted Manuscript
Journal Name:
Soft Matter
Additional Journal Information:
Journal Volume: 15; Journal Issue: 38; Journal ID: ISSN 1744-683X
Publisher:
Royal Society of Chemistry
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY

Citation Formats

Bagchi, Kushal, Gujral, Ankit, Toney, M. F., and Ediger, M. D. Generic packing motifs in vapor-deposited glasses of organic semiconductors. United States: N. p., 2019. Web. doi:10.1039/c9sm01155b.
Bagchi, Kushal, Gujral, Ankit, Toney, M. F., & Ediger, M. D. Generic packing motifs in vapor-deposited glasses of organic semiconductors. United States. doi:10.1039/c9sm01155b.
Bagchi, Kushal, Gujral, Ankit, Toney, M. F., and Ediger, M. D. Fri . "Generic packing motifs in vapor-deposited glasses of organic semiconductors". United States. doi:10.1039/c9sm01155b.
@article{osti_1576797,
title = {Generic packing motifs in vapor-deposited glasses of organic semiconductors},
author = {Bagchi, Kushal and Gujral, Ankit and Toney, M. F. and Ediger, M. D.},
abstractNote = {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.},
doi = {10.1039/c9sm01155b},
journal = {Soft Matter},
number = 38,
volume = 15,
place = {United States},
year = {2019},
month = {8}
}

Journal Article:
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