Microscopic, spectroscopic, and electrochemical characterization of novel semicrystalline poly(3-hexylthiophene)-based dendritic star copolymer
Loading...
Date
2022
Journal Title
Journal ISSN
Volume Title
Publisher
MDPI
Abstract
In this study, electron-donating semicrystalline generation 1 poly(propylene thiophenoimine)-
co-poly(3-hexylthiophene) star copolymer, G1PPT-co-P3HT was chemically prepared for the first time.
Copolymerization was achieved with high molecular weight via facile green oxidative reaction. 1H
NMR analyses of the star copolymer demonstrated the presence of 84% regioregular (rr) head-to-tail
(HT) P3HT, which accounts for the molecular ordering in some grain regions in the macromolecule’s
morphology, as revealed by the high-resolution scanning electron microscopy (HRSEM) and Selected
Area Electron Diffraction (SAED) images, and X-ray diffraction spectroscopy (XRD) measurements.
The star copolymer also exhibited good absorption properties in the ultraviolet-visible (UV-Vis)
and the near infrared (NIR) spectral regions, which give rise to an optical energy bandgap value as
low as 1.43 eV. A HOMO energy level at 5.53 eV, which is below the air-oxidation threshold, was
obtained by cyclic voltammetry (CV).
Description
Keywords
Organic photovoltaics, Chemistry, Dendrimer, Macromolecules, Infrared devices
Citation
Djoumessi Yonkeu, A. L. et al. (2022). Microscopic, spectroscopic, and electrochemical characterization of novel semicrystalline poly(3-hexylthiophene)-based dendritic star copolymer. Polymers, 14(20), 4400. https://doi.org/10.3390/polym14204400