Lactone Backbone Density in Rigid Electron-Deficient Semiconducting Polymers Enabling High n-type Organic Thermoelectric PerformanceShow others and affiliations
2022 (English)In: Angewandte Chemie International Edition, ISSN 1433-7851, E-ISSN 1521-3773, Vol. 61, no 7, article id e202113078Article in journal (Refereed) Published
Abstract [en]
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 mu Wm(-1) K-2 were thereby enabled. These findings present new insights into material design guidelines for the future development of air stable n-type organic thermoelectrics.
Place, publisher, year, edition, pages
WILEY-V C H VERLAG GMBH , 2022. Vol. 61, no 7, article id e202113078
Keywords [en]
chemical doping; metal-free polymerization; organic thermoelectrics; rigid semiconducting polymers; synthetic methods
National Category
Materials Chemistry
Identifiers
URN: urn:nbn:se:liu:diva-181996DOI: 10.1002/anie.202113078ISI: 000731290800001PubMedID: 34797584OAI: oai:DiVA.org:liu-181996DiVA, id: diva2:1623071
Note
Funding Agencies|KAUSTKing Abdullah University of Science & Technology; Office of Sponsored Research (OSR) [OSR-2018-CRG/CCF-3079, OSR-2019-CRG8-4086, OSR-2018-CRG7-3749]; ERC Synergy Grant SC2 [610115]; European Unions Horizon 2020 research and innovation program [952911, 862474]; EPSRC ProjectUK Research & Innovation (UKRI)Engineering & Physical Sciences Research Council (EPSRC) [EP/T026219/1B]; National Science FoundationNational Science Foundation (NSF) [NSF DMR-1751308]; DOE Office of ScienceUnited States Department of Energy (DOE) [DE-AC02-06CH11357]; Knut and Alice Wallenberg foundationKnut & Alice Wallenberg Foundation; Swedish Research CouncilSwedish Research CouncilEuropean Commission [2020-03243]; Olle Engkvists Stiftelse [204-0256]; ECEuropean CommissionEuropean Commission Joint Research Centre [GA-955837]; Swedish Government Strategic Research Area in Materials Science on Functional Materials at Linkoping University (Faculty Grant SFO-Mat-LiU) [2009-00971]
2021-12-272021-12-272022-10-12