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Ultrasoft and High-Mobility Block Copolymers for Skin-Compatible Electronics
Publikationstyp
Journal Article
Date Issued
2021-01-27
Sprache
English
Journal
Volume
33
Issue
4
Article Number
2005416
Citation
Advanced Materials 33 (4): 2005416 (2021-01-27)
Publisher DOI
Scopus ID
PubMed ID
33314375
Polymer semiconductors (PSCs) are an essential component of organic field-effect transistors (OFETs), but their potential for stretchable electronics is limited by their brittleness and failure susceptibility upon strain. Herein, a covalent connection of two state-of-the-art polymers—semiconducting poly-diketo-pyrrolopyrrole-thienothiophene (PDPP-TT) and elastomeric poly(dimethylsiloxane) (PDMS)—in a single triblock copolymer (TBC) chain is reported, which enables high charge carrier mobility and low modulus in one system. Three TBCs containing up to 65 wt% PDMS were obtained, and the TBC with 65 wt% PDMS content exhibits mobilities up to 0.1 cm2 V−1 s−1, in the range of the fully conjugated reference polymer PDPP-TT (0.7 cm2 V−1 s−1). The TBC is ultrasoft with a low elastic modulus (5 MPa) in the range of mammalian tissue. The TBC exhibits an excellent stretchability and extraordinary durability, fully maintaining the initial electric conductivity in a doped state after 1500 cycles to 50% strain.
Subjects
block copolymers
organic field-effect transistors
skin-compatible electronics
stretchable organic electronics