Correlation of Processing and Structure in an Ethylene‐Glycol Side‐Chain Modified Polythiophene via Combined X‐Ray Scattering and 4D Scanning Transmission Electron Microscopy

Herzing, Andrew A.; Flagg, Lucas Q.; Snyder, Chad R.; Richter, Lee J.; Onorato, Jonathan W.; Luscombe, Christine K.; Li, Ruipeng

doi:10.1002/smtd.202400801

Correlation of Processing and Structure in an Ethylene‐Glycol Side‐Chain Modified Polythiophene via Combined X‐Ray Scattering and 4D Scanning Transmission Electron Microscopy

Journal Article · Thu Oct 10 00:00:00 EDT 2024 · Small Methods

DOI:https://doi.org/10.1002/smtd.202400801· OSTI ID:2587800

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National Inst. of Standards and Technology (NIST), Gaithersburg, MD (United States)
Univ. of Washington, Seattle, WA (United States)
Okinawa Institute of Science and Technology Graduate University (Japan)
Brookhaven National Laboratory (BNL), Upton, NY (United States). National Synchrotron Light Source II (NSLS-II)

The results of a combined grazing incidence wide-angle X-ray scattering (GIWAXS) and 4D scanning transmission microscopy (4D-STEM) analysis of the effects of thermal processing on poly(3[2-(2-methoxyethoxy)ethoxy]-methylthiophene-2,5-diyl) are reported, a conjugated semiconducting polymer used as the active layer in organic electrochemical transistor devices. GIWAXS provides a measure of overall crystallinity in the film, while 4D-STEM produces real-space maps of the morphology and orientation of individual crystallites along with their spatial extent and distribution. The sensitivity of the 4D-STEM detector allows for collection of electron diffraction patterns at each position in an image scan while limiting the imparted electron dose to below the damage threshold. In conclusion, the effects of heat treatment on the distribution and type of crystallites present in the films is determined.

View Accepted Manuscript (DOE)

Research Organization:: Brookhaven National Laboratory (BNL), Upton, NY (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES). Scientific User Facilities (SUF)

Grant/Contract Number:: AC02-05CH11231; SC0012704

OSTI ID:: 2587800

Report Number(s):: BNL--228871-2025-JAAM

Journal Information:: Small Methods, Journal Name: Small Methods Journal Issue: 1 Vol. 9; ISSN 2366-9608

Publisher:: WileyCopyright Statement

Country of Publication:: United States

Language:: English

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