Premium
Toward High Mobility Green Solvent‐Processable Conjugated Polymers: A Systematic Study on Chalcogen Effect in Poly(Diketopyrrolopyrrole‐ alt ‐Terchalcogenophene)s
Author(s) -
Wang Zhongli,
Shi Yibo,
Deng Yunfeng,
Han Yang,
Geng Yanhou
Publication year - 2021
Publication title -
advanced functional materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 6.069
H-Index - 322
eISSN - 1616-3028
pISSN - 1616-301X
DOI - 10.1002/adfm.202104881
Subject(s) - materials science , chalcogen , thiophene , polymer , conjugated system , furan , solubility , anisole , solvent , electron mobility , chemical engineering , polymer chemistry , organic chemistry , composite material , chemistry , optoelectronics , catalysis , engineering
Nine diketopyrrolopyrrole (DPP)‐based conjugated polymers (CPs), that is, poly(diketopyrrolopyrrole‐ alt ‐terchalcogenophene)s, via combinations of furanyl‐(FDPP), thienyl‐(TDPP), selenophenyl‐DPP (SeDPP) and furan, thiophene, selenophene comonomers, are synthesized to explore the chalcogen effect on the solubility, film morphology/microstructure, and charge transport property of the resultant polymers. All polymers except for SeDPP‐Se are soluble in non‐chlorinated solvents such as o ‐xylene and tetralin. Flanking of DPP with furan in FDPP‐F, FDPP‐T, and FDPP‐Se enables even good solubility in green solvent anisole. TDPP‐Se exhibits the highest reliable hole mobility over 10 cm 2 V −1 s −1 in organic thin film transistors (OTFTs) bar‐coated from o ‐xylene/tetralin (20/80 v/v) solution. With anisole as the processing solvent, FDPP‐F‐based bar‐coated OTFTs displays a reliable hole mobility up to 3.50 cm 2 V −1 s −1 . This is the first report on green solvent processed OTFTs with mobility above 1 cm 2 V −1 s −1 . Charge transport property of all the polymers is correlated with the film morphology and microstructure that are noticeably influenced by the type and position of chalcogenophenes. The current work sheds light on the design of high mobility CPs processable with green solvents.