High Dielectric Constant Semiconducting Poly(3-alkylthiophene)s from Side Chain Modification with Polar Sulfinyl and Sulfonyl Groups
Abstract
In this paper, there is growing interest in designing and developing high dielectric constant (εr) organic semiconductors because they have the potential to further enhance device performance by promoting exciton dissociation, reducing bimolecular charge carrier recombination, and potentially enhancing charge carrier mobility via charge screening. In this study, a new class of semiconducting polymers with high εr, i.e., sulfinylated and sulfonylated poly(3-alkylthiophene)s (P3ATs), were synthesized. Because of efficient rotation of highly polar methylsulfinyl and methylsulfonyl side groups (i.e., orientational polarization), high εr values were achieved for these functionalized P3ATs based on an accurate capacitance measurement using a gold/semiconducting polymer/SiO2/n-doped Si configuration. For example, the εr at megahertz and room temperature increased from 3.75 for the regioregular poly(3-hexylthiophene) (P3HT) to 7.4 for the sulfinylated and 8.1–9.3 for sulfonylated P3AT polymers. These values are among the highest εr reported for conjugated polymers so far. Grazing-incident wide-angle X-ray diffraction results showed that these polar groups decreased the crystallinity for the polythiophene backbones and interfered with the π–π stacking in the crystalline structure. Consequently, their optical properties, including UV–vis absorption and fluorescence, changed in thin films. From this study, the sulfinylated polymer may be promising to provide a balance between high εr and preservingmore »
- Authors:
-
[1];
[1];
[1];
[1]
- Case Western Reserve Univ., Cleveland, OH (United States)
- Brookhaven National Lab. (BNL), Upton, NY (United States)
- Publication Date:
- Research Org.:
- Brookhaven National Laboratory (BNL), Upton, NY (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- OSTI Identifier:
- 1491148
- Report Number(s):
- BNL-210851-2019-JAAM
Journal ID: ISSN 0024-9297
- Grant/Contract Number:
- SC0012704
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Macromolecules
- Additional Journal Information:
- Journal Volume: 51; Journal Issue: 22; Journal ID: ISSN 0024-9297
- Publisher:
- American Chemical Society
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE
Citation Formats
Wang, Chunlai, Zhang, Zhongbo, Pejić, Sandra, Li, Ruipeng, Fukuto, Masafumi, Zhu, Lei, and Sauvé, Geneviève. High Dielectric Constant Semiconducting Poly(3-alkylthiophene)s from Side Chain Modification with Polar Sulfinyl and Sulfonyl Groups. United States: N. p., 2018.
Web. doi:10.1021/acs.macromol.8b01895.
Wang, Chunlai, Zhang, Zhongbo, Pejić, Sandra, Li, Ruipeng, Fukuto, Masafumi, Zhu, Lei, & Sauvé, Geneviève. High Dielectric Constant Semiconducting Poly(3-alkylthiophene)s from Side Chain Modification with Polar Sulfinyl and Sulfonyl Groups. United States. https://doi.org/10.1021/acs.macromol.8b01895
Wang, Chunlai, Zhang, Zhongbo, Pejić, Sandra, Li, Ruipeng, Fukuto, Masafumi, Zhu, Lei, and Sauvé, Geneviève. Wed .
"High Dielectric Constant Semiconducting Poly(3-alkylthiophene)s from Side Chain Modification with Polar Sulfinyl and Sulfonyl Groups". United States. https://doi.org/10.1021/acs.macromol.8b01895. https://www.osti.gov/servlets/purl/1491148.
@article{osti_1491148,
title = {High Dielectric Constant Semiconducting Poly(3-alkylthiophene)s from Side Chain Modification with Polar Sulfinyl and Sulfonyl Groups},
author = {Wang, Chunlai and Zhang, Zhongbo and Pejić, Sandra and Li, Ruipeng and Fukuto, Masafumi and Zhu, Lei and Sauvé, Geneviève},
abstractNote = {In this paper, there is growing interest in designing and developing high dielectric constant (εr) organic semiconductors because they have the potential to further enhance device performance by promoting exciton dissociation, reducing bimolecular charge carrier recombination, and potentially enhancing charge carrier mobility via charge screening. In this study, a new class of semiconducting polymers with high εr, i.e., sulfinylated and sulfonylated poly(3-alkylthiophene)s (P3ATs), were synthesized. Because of efficient rotation of highly polar methylsulfinyl and methylsulfonyl side groups (i.e., orientational polarization), high εr values were achieved for these functionalized P3ATs based on an accurate capacitance measurement using a gold/semiconducting polymer/SiO2/n-doped Si configuration. For example, the εr at megahertz and room temperature increased from 3.75 for the regioregular poly(3-hexylthiophene) (P3HT) to 7.4 for the sulfinylated and 8.1–9.3 for sulfonylated P3AT polymers. These values are among the highest εr reported for conjugated polymers so far. Grazing-incident wide-angle X-ray diffraction results showed that these polar groups decreased the crystallinity for the polythiophene backbones and interfered with the π–π stacking in the crystalline structure. Consequently, their optical properties, including UV–vis absorption and fluorescence, changed in thin films. From this study, the sulfinylated polymer may be promising to provide a balance between high εr and preserving favorable polythiophene π–π stacking structure for device applications.},
doi = {10.1021/acs.macromol.8b01895},
journal = {Macromolecules},
number = 22,
volume = 51,
place = {United States},
year = {Wed Nov 14 00:00:00 EST 2018},
month = {Wed Nov 14 00:00:00 EST 2018}
}
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