skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Block Co-PolyMOCs by Stepwise Self-Assembly

Authors:
; ; ; ; ;
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States). Advanced Photon Source (APS)
Sponsoring Org.:
NSFINDUSTRY
OSTI Identifier:
1346237
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of the American Chemical Society; Journal Volume: 138; Journal Issue: 33
Country of Publication:
United States
Language:
ENGLISH

Citation Formats

Wang, Yufeng, Zhong, Mingjiang, Park, Jiwon V., Zhukhovitskiy, Aleksandr V., Shi, Weichao, and Johnson, Jeremiah A.. Block Co-PolyMOCs by Stepwise Self-Assembly. United States: N. p., 2016. Web. doi:10.1021/jacs.6b06712.
Wang, Yufeng, Zhong, Mingjiang, Park, Jiwon V., Zhukhovitskiy, Aleksandr V., Shi, Weichao, & Johnson, Jeremiah A.. Block Co-PolyMOCs by Stepwise Self-Assembly. United States. doi:10.1021/jacs.6b06712.
Wang, Yufeng, Zhong, Mingjiang, Park, Jiwon V., Zhukhovitskiy, Aleksandr V., Shi, Weichao, and Johnson, Jeremiah A.. Wed . "Block Co-PolyMOCs by Stepwise Self-Assembly". United States. doi:10.1021/jacs.6b06712.
@article{osti_1346237,
title = {Block Co-PolyMOCs by Stepwise Self-Assembly},
author = {Wang, Yufeng and Zhong, Mingjiang and Park, Jiwon V. and Zhukhovitskiy, Aleksandr V. and Shi, Weichao and Johnson, Jeremiah A.},
abstractNote = {},
doi = {10.1021/jacs.6b06712},
journal = {Journal of the American Chemical Society},
number = 33,
volume = 138,
place = {United States},
year = {Wed Aug 24 00:00:00 EDT 2016},
month = {Wed Aug 24 00:00:00 EDT 2016}
}
  • Block copolymers made by covalently linking two or more conjugated polymers have significant potential for organic optoelectronic applications, particularly those requiring a p/n junction. Herein, we report the structure of all-conjugated diblock copolymers poly(3-hexylthiophene)-block-poly(9,9-dioctylfluorene) and poly(3-hexylthiophene)-block-poly(9,9-dioctylfluorene-co-benzothiadiazole) in thin films and in the bulk. The diblock copolymers are prepared using a combination of Grignard metathesis polymerization and Suzuki polycondensation and purified using solvent extraction and column chromatography. 1H NMR, SEC, and UV/Visible absorbance measurements are used to characterize the materials and quantify the amount of homopolymer impurities. Thin films and bulk structure are characterized using a combination of differential scanning calorimetry,more » x-ray diffraction, small-angle x-ray scattering, and atomic force microscopy. Atomic force microscopy images reveal nanoscale lamellar domains in solvent-annealed diblock copolymer thin films, and peaks in x-ray diffraction data correspond to poly(3-hexylthiophene) crystallites. On cooling from temperatures above the crystallization temperature to below the crystallization temperature, two peaks appear in temperature-dependent small-angle x-ray scattering traces - one associated with poly(3-hexylthiophene) crystallites and a second low-angle peak indicative of a self-assembled nanostructured. These measurements show all-conjugated diblock copolymers self-assemble into nanoscale crystalline domains present throughout the bulk samples which may be useful for improving the performance of organic photovoltaics and organic light-emitting diodes.« less
  • All-conjugated block copolymers have significant potential for solution-processed optoelectronic applications, in particular those relying on a p/n junction. Herein, we report the synthesis and structure of all-conjugated diblock copolymers poly(3-hexylthiophene)-block-poly(9,9-dioctylfluorene) and poly(3-hexylthiophene)-block-poly(9,9-dioctylfluorene-co-benzothiadiazole) in thin films and in the bulk. The diblock copolymers are prepared using a combination of Grignard metathesis polymerization and Suzuki polycondensation and characterized with NMR spectroscopy, size-exclusion chromatography, multiangle laser light scattering, and UV/vis spectroscopy. Structure in thin films and in the bulk is characterized using differential scanning calorimetry, X-ray diffraction, small-angle X-ray scattering, and atomic force microscopy. Diblock copolymer thin films self-assemble into a crystalline nanostructuremore » with some long-range order after extended solvent annealing, and X-ray scattering measurements show that powder samples exhibit crystallinity throughout the bulk. By temperature dependent X-ray scattering measurements, we find that diblock copolymers self-assemble into crystalline nanowires with phase segregated block copolymer domains. These measurements show all-conjugated diblock copolymers may be useful for achieving solution-processed active layers in organic photovoltaics and light-emitting diodes with optimized structural and photophysical characteristics.« less
  • All-conjugated block copolymers have significant potential for solution-processed optoelectronic applications, in particular those relying on a p/n junction. Herein, we report the synthesis and structure of all-conjugated diblock copolymers poly(3-hexylthiophene)-block-poly(9,9-dioctylfluorene) and poly(3-hexylthiophene)-block-poly(9,9-dioctylfluorene-co-benzothiadiazole) in thin films and in the bulk. The diblock copolymers are prepared using a combination of Grignard metathesis polymerization and Suzuki polycondensation and characterized with NMR spectroscopy, size-exclusion chromatography, multiangle laser light scattering, and UV/vis spectroscopy. Structure in thin films and in the bulk is characterized using differential scanning calorimetry, X-ray diffraction, small-angle X-ray scattering, and atomic force microscopy. Diblock copolymer thin films self-assemble into a crystalline nanostructuremore » with some long-range order after extended solvent annealing, and X-ray scattering measurements show that powder samples exhibit crystallinity throughout the bulk. By temperature dependent X-ray scattering measurements, we find that diblock copolymers self-assemble into crystalline nanowires with phase segregated block copolymer domains. These measurements show all-conjugated diblock copolymers may be useful for achieving solution-processed active layers in organic photovoltaics and light-emitting diodes with optimized structural and photophysical characteristics.« less