Enhancing the Conductivity and Thermoelectric Performance of Semicrystalline Conducting Polymers through Controlled Tie Chain Incorporation.

Autor: Zhu W; Optoelectronics Group, Cavendish Laboratory, University of Cambridge, JJ Thomson Avenue, Cambridge, CB3 0HE, UK., Qiu X; Optoelectronics Group, Cavendish Laboratory, University of Cambridge, JJ Thomson Avenue, Cambridge, CB3 0HE, UK., Laulainen JEM; Department of Materials Science and Engineering, University of Cambridge, Cambridge, CB3 0FS, UK., Un HL; Optoelectronics Group, Cavendish Laboratory, University of Cambridge, JJ Thomson Avenue, Cambridge, CB3 0HE, UK., Ren X; Optoelectronics Group, Cavendish Laboratory, University of Cambridge, JJ Thomson Avenue, Cambridge, CB3 0HE, UK., Xiao M; Optoelectronics Group, Cavendish Laboratory, University of Cambridge, JJ Thomson Avenue, Cambridge, CB3 0HE, UK., Freychet G; University of Grenoble Alpes, CEA, Leti, Grenoble, F-38000, France., Vacek P; Department of Materials Science and Engineering, University of Cambridge, Cambridge, CB3 0FS, UK., Tjhe D; Optoelectronics Group, Cavendish Laboratory, University of Cambridge, JJ Thomson Avenue, Cambridge, CB3 0HE, UK., He Q; Department of Chemistry, Imperial College London, London, SW72AZ, UK., Wood W; Optoelectronics Group, Cavendish Laboratory, University of Cambridge, JJ Thomson Avenue, Cambridge, CB3 0HE, UK., Wang Z; Optoelectronics Group, Cavendish Laboratory, University of Cambridge, JJ Thomson Avenue, Cambridge, CB3 0HE, UK., Zhang Y; Optoelectronics Group, Cavendish Laboratory, University of Cambridge, JJ Thomson Avenue, Cambridge, CB3 0HE, UK., Qu Z; Optoelectronics Group, Cavendish Laboratory, University of Cambridge, JJ Thomson Avenue, Cambridge, CB3 0HE, UK., Asatryan J; Centro de Investigacións Tecnolóxicas (CIT), Campus Industrial de Ferrol, Universidade da Coruña, Esteiro, Ferrol, 15471, Spain., Martin J; Centro de Investigacións Tecnolóxicas (CIT), Campus Industrial de Ferrol, Universidade da Coruña, Esteiro, Ferrol, 15471, Spain.; POLYMAT Paseo Manuel de Lardizabal 3, Donostia-San Sebastián, 20018, Spain., Heeney M; Department of Chemistry, Imperial College London, London, SW72AZ, UK., McNeill CR; Department of Materials Science and Engineering, Monash University, Clayton, Victoria, 3800, Australia., Midgley PA; Department of Materials Science and Engineering, University of Cambridge, Cambridge, CB3 0FS, UK., Jacobs IE; Optoelectronics Group, Cavendish Laboratory, University of Cambridge, JJ Thomson Avenue, Cambridge, CB3 0HE, UK., Sirringhaus H; Optoelectronics Group, Cavendish Laboratory, University of Cambridge, JJ Thomson Avenue, Cambridge, CB3 0HE, UK.
Jazyk: angličtina
Zdroj: Advanced materials (Deerfield Beach, Fla.) [Adv Mater] 2024 Jul; Vol. 36 (28), pp. e2310480. Date of Electronic Publication: 2024 May 13.
DOI: 10.1002/adma.202310480
Abstrakt: Conjugated polymers are promising materials for thermoelectric applications, however, at present few effective and well-understood strategies exist to further advance their thermoelectric performance. Here a new model system is reported for a better understanding of the key factors governing their thermoelectric properties: aligned, ribbon-phase poly[2,5-bis(3-dodecylthiophen-2-yl)thieno[3,2-b]thiophene] (PBTTT) doped by ion-exchange doping. Using a range of microstructural and spectroscopic methods, the effect of controlled incorporation of tie-chains between the crystalline domains is studied through blending of high and low molecular weight chains. The tie chains provide efficient transport pathways between crystalline domains and lead to significantly enhanced electrical conductivity of 4810 S cm -1 , which is not accompanied by a reduction in Seebeck coefficient or a large increase in thermal conductivity. Respectable power factors of 173 µW m -1 K -2 are demonstrated in this model system. The approach is generally applicable to a wide range of semicrystalline conjugated polymers and could provide an effective pathway for further enhancing their thermoelectric properties and overcome traditional trade-offs in optimization of thermoelectric performance.
(© 2024 The Authors. Advanced Materials published by Wiley‐VCH GmbH.)
Databáze: MEDLINE
Externí odkaz: