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Title: Vapor deposition rate modifies anisotropic glassy structure of an anthracene-based organic semiconductor

Abstract

We control the anisotropic molecular packing of vapor-deposited glasses of ABH113, a deuterated anthracene derivative with promise for future organic light emitting diode materials, by changing the deposition rate and substrate temperature at which they are prepared. We find that at substrate temperatures from 0.65 Tg to 0.92 Tg, the deposition rate significantly modifies the orientational order in the vapor-deposited glasses as characterized by x-ray scattering and birefringence. Both measures of anisotropic order can be described by a single deposition rate–substrate temperature superposition (RTS). This supports the applicability of the surface equilibration mechanism and generalizes the RTS principle from previous model systems with liquid crystalline order to non-mesogenic organic semiconductors. We find that vapordeposited glasses of ABH113 have significantly enhanced density and thermal stability compared to their counterparts prepared by liquidcooling. For organic semiconductors, the results of this study provide an efficient guide for using the deposition rate to prepare stable glasses with controlled molecular packing.

Authors:
ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [2]; ORCiD logo [1]
  1. Univ. of Wisconsin, Madison, WI (United States)
  2. Univ. of Colorado, Boulder, CO (United States)
Publication Date:
Research Org.:
SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States). Stanford Synchrotron Radiation Lightsource (SSRL)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES); National Science Foundation (NSF)
OSTI Identifier:
1982367
Alternate Identifier(s):
OSTI ID: 1838211
Grant/Contract Number:  
AC02-76SF00515; DMR-1720415
Resource Type:
Accepted Manuscript
Journal Name:
Journal of Chemical Physics
Additional Journal Information:
Journal Volume: 156; Journal Issue: 1; Journal ID: ISSN 0021-9606
Publisher:
American Institute of Physics (AIP)
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; Chemistry; Physics; Organic semiconductors; Light emitting diode materials; Glass; Materials properties; Glass transitions; Birefringence; Vapor deposition; Differential scanning calorimetry; X-ray scattering

Citation Formats

Bishop, Camille, Bagchi, Kushal, Toney, Michael F., and Ediger, M. D. Vapor deposition rate modifies anisotropic glassy structure of an anthracene-based organic semiconductor. United States: N. p., 2022. Web. doi:10.1063/5.0074092.
Bishop, Camille, Bagchi, Kushal, Toney, Michael F., & Ediger, M. D. Vapor deposition rate modifies anisotropic glassy structure of an anthracene-based organic semiconductor. United States. https://doi.org/10.1063/5.0074092
Bishop, Camille, Bagchi, Kushal, Toney, Michael F., and Ediger, M. D. Tue . "Vapor deposition rate modifies anisotropic glassy structure of an anthracene-based organic semiconductor". United States. https://doi.org/10.1063/5.0074092. https://www.osti.gov/servlets/purl/1982367.
@article{osti_1982367,
title = {Vapor deposition rate modifies anisotropic glassy structure of an anthracene-based organic semiconductor},
author = {Bishop, Camille and Bagchi, Kushal and Toney, Michael F. and Ediger, M. D.},
abstractNote = {We control the anisotropic molecular packing of vapor-deposited glasses of ABH113, a deuterated anthracene derivative with promise for future organic light emitting diode materials, by changing the deposition rate and substrate temperature at which they are prepared. We find that at substrate temperatures from 0.65 Tg to 0.92 Tg, the deposition rate significantly modifies the orientational order in the vapor-deposited glasses as characterized by x-ray scattering and birefringence. Both measures of anisotropic order can be described by a single deposition rate–substrate temperature superposition (RTS). This supports the applicability of the surface equilibration mechanism and generalizes the RTS principle from previous model systems with liquid crystalline order to non-mesogenic organic semiconductors. We find that vapordeposited glasses of ABH113 have significantly enhanced density and thermal stability compared to their counterparts prepared by liquidcooling. For organic semiconductors, the results of this study provide an efficient guide for using the deposition rate to prepare stable glasses with controlled molecular packing.},
doi = {10.1063/5.0074092},
journal = {Journal of Chemical Physics},
number = 1,
volume = 156,
place = {United States},
year = {Tue Jan 04 00:00:00 EST 2022},
month = {Tue Jan 04 00:00:00 EST 2022}
}

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