Lactone Backbone Density in Rigid Electron-Deficient Semiconducting Polymers Enabling High n-type Organic Thermoelectric Performance

Maryam Alsufyani, Marc-Antoine Stoeckel, Xingxing Chen, Karl Thorely, Rawad K Hallani, Yuttapoom Puttisong, Xudong Ji, Dilara Meli, Bryan D Paulsen, Joseph Strzalka, Khrystyna Regeta, Craig Combe, Hu Chen, Junfu Tian, Jonathan Rivnay, Simone Fabiano, Iain McCulloch

Research output: Contribution to journalArticlepeer-review

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−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.
Original languageEnglish (US)
JournalAngewandte Chemie International Edition
DOIs
StatePublished - Nov 19 2021

ASJC Scopus subject areas

  • Chemistry(all)
  • Catalysis

Fingerprint

Dive into the research topics of 'Lactone Backbone Density in Rigid Electron-Deficient Semiconducting Polymers Enabling High n-type Organic Thermoelectric Performance'. Together they form a unique fingerprint.

Cite this