skip to main content

DOE PAGESDOE PAGES

Title: Molecular organization in MAPLE-deposited conjugated polymer thin films and the implications for carrier transport characteristics

The morphological structure of poly(3-hexylthiophene) (P3HT) thin films deposited by both Matrix Assisted Pulsed Laser Evaporation (MAPLE) and solution spin-casting methods are investigated. We found that the MAPLE samples possessed a higher degree of disorder, with random orientations of polymer crystallites along the side-chain stacking, π-π stacking, and conjugated backbone directions. Furthermore, the average molecular orientations and relative degrees of crystallinity of MAPLE-deposited polymer films are insensitive to the chemistries of the substrates onto which they were deposited; this is in stark contrast to the films prepared by the conventional spin-casting technique. In spite of the seemingly unfavorable molecular orientations and the highly disordered morphologies, the in-plane charge carrier transport characteristics of the MAPLE samples are comparable to those of spin-cast samples, exhibiting similar transport activation energies (56 meV versus 54 meV) to those reported in the literature for high mobility polymers.
Authors:
 [1] ;  [1] ;  [2] ;  [3] ;  [1]
  1. Univ. of Michigan, Ann Arbor, MI (United States). Dept. of Materials Science and Engineering
  2. Argonne National Lab. (ANL), Argonne, IL (United States). X-ray Science Division
  3. Univ. of Houston, TX (United States). Dept. of Chemical and Biomolecular Engineering
Publication Date:
Grant/Contract Number:
AC02-06CH11357
Type:
Accepted Manuscript
Journal Name:
Journal of Polymer Science. Part B, Polymer Physics
Additional Journal Information:
Journal Volume: 55; Journal Issue: 1; Journal ID: ISSN 0887-6266
Publisher:
Wiley
Research Org:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22); National Science Foundation (NSF); Vietnam Education Foundation
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; conjugated polymers; ellipsometry; MAPLE; thin film transistor; X-ray
OSTI Identifier:
1339946

Dong, Ban Xuan, Li, Anton, Strzalka, Joseph, Stein, Gila E., and Green, Peter F.. Molecular organization in MAPLE-deposited conjugated polymer thin films and the implications for carrier transport characteristics. United States: N. p., Web. doi:10.1002/polb.24237.
Dong, Ban Xuan, Li, Anton, Strzalka, Joseph, Stein, Gila E., & Green, Peter F.. Molecular organization in MAPLE-deposited conjugated polymer thin films and the implications for carrier transport characteristics. United States. doi:10.1002/polb.24237.
Dong, Ban Xuan, Li, Anton, Strzalka, Joseph, Stein, Gila E., and Green, Peter F.. 2016. "Molecular organization in MAPLE-deposited conjugated polymer thin films and the implications for carrier transport characteristics". United States. doi:10.1002/polb.24237. https://www.osti.gov/servlets/purl/1339946.
@article{osti_1339946,
title = {Molecular organization in MAPLE-deposited conjugated polymer thin films and the implications for carrier transport characteristics},
author = {Dong, Ban Xuan and Li, Anton and Strzalka, Joseph and Stein, Gila E. and Green, Peter F.},
abstractNote = {The morphological structure of poly(3-hexylthiophene) (P3HT) thin films deposited by both Matrix Assisted Pulsed Laser Evaporation (MAPLE) and solution spin-casting methods are investigated. We found that the MAPLE samples possessed a higher degree of disorder, with random orientations of polymer crystallites along the side-chain stacking, π-π stacking, and conjugated backbone directions. Furthermore, the average molecular orientations and relative degrees of crystallinity of MAPLE-deposited polymer films are insensitive to the chemistries of the substrates onto which they were deposited; this is in stark contrast to the films prepared by the conventional spin-casting technique. In spite of the seemingly unfavorable molecular orientations and the highly disordered morphologies, the in-plane charge carrier transport characteristics of the MAPLE samples are comparable to those of spin-cast samples, exhibiting similar transport activation energies (56 meV versus 54 meV) to those reported in the literature for high mobility polymers.},
doi = {10.1002/polb.24237},
journal = {Journal of Polymer Science. Part B, Polymer Physics},
number = 1,
volume = 55,
place = {United States},
year = {2016},
month = {9}
}