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Lactone Backbone Density in Rigid Electron-Deficient Semiconducting Polymers Enabling High n-type Organic Thermoelectric Performance.
- Source :
-
Angewandte Chemie (International ed. in English) [Angew Chem Int Ed Engl] 2022 Feb 07; Vol. 61 (7), pp. e202113078. Date of Electronic Publication: 2021 Dec 18. - Publication Year :
- 2022
-
Abstract
- Three lactone-based rigid semiconducting polymers were designed to overcome major limitations in the development of n-type organic thermoelectrics, namely electrical conductivity and air stability. Experimental and theoretical investigations demonstrated that increasing the lactone group density by increasing the benzene content from 0 % benzene (P-0), to 50 % (P-50), and 75 % (P-75) resulted in progressively larger electron affinities (up to 4.37 eV), suggesting a more favorable doping process, when employing (N-DMBI) as the dopant. Larger polaron delocalization was also evident, due to the more planarized conformation, which is proposed to lead to a lower hopping energy barrier. As a consequence, the electrical conductivity increased by three orders of magnitude, to achieve values of up to 12 S cm and Power factors of 13.2 μWm <superscript>-1</superscript> K <superscript>-2</superscript> were thereby enabled. These findings present new insights into material design guidelines for the future development of air stable n-type organic thermoelectrics.<br /> (© 2021 Wiley-VCH GmbH.)
Details
- Language :
- English
- ISSN :
- 1521-3773
- Volume :
- 61
- Issue :
- 7
- Database :
- MEDLINE
- Journal :
- Angewandte Chemie (International ed. in English)
- Publication Type :
- Academic Journal
- Accession number :
- 34797584
- Full Text :
- https://doi.org/10.1002/anie.202113078