Diketopyrrolopyrrole-Polymer Meets Thiol–Ene Click Chemistry: A Cross-Linked Acceptor for Thermally Stable Near-Infrared Photodetectors

Diketopyrrolopyrrole-Polymer Meets Thiol–Ene Click Chemistry: A Cross-Linked Acceptor for Thermally Stable Near-Infrared Photodetectors

A problem of bulk-heterojunction (BHJ) organic photodetectors (OPDs) is the morphological instability arising from segregation and demixing of its donor and acceptor components. To stabilize the morphology of the blended active layer we synthesized a cross-linkable low-band-gap 1,4-diketopyrrolo­[3,...

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Veröffentlicht in:Chemistry of materials 2019-09, Vol.31 (18), p.7657-7665
Hauptverfasser: Casutt, Manuela, Ruscello, Marta, Strobel, Noah, Koser, Silke, Bunz, Uwe H. F, Jänsch, Daniel, Freudenberg, Jan, Hernandez-Sosa, Gerardo, Müllen, Klaus
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container_end_page 7665
container_issue 18
container_start_page 7657
container_title Chemistry of materials
container_volume 31
creator Casutt, Manuela
Ruscello, Marta
Strobel, Noah
Koser, Silke
Bunz, Uwe H. F
Jänsch, Daniel
Freudenberg, Jan
Hernandez-Sosa, Gerardo
Müllen, Klaus
description A problem of bulk-heterojunction (BHJ) organic photodetectors (OPDs) is the morphological instability arising from segregation and demixing of its donor and acceptor components. To stabilize the morphology of the blended active layer we synthesized a cross-linkable low-band-gap 1,4-diketopyrrolo­[3,4-c]­pyrrole (DPP)-based donor–acceptor (DA) copolymer with ω-alkenyl side chains. Due to its absorption cutoff above 1000 nm we employed it as an acceptor material in a solution-processed BHJ near-infrared-OPD with P3HT as a donor. Photochemical in situ thiol–ene click chemistry using a tetrathiol as an additive cross-linker renders the BHJ insoluble to organic solvents and stable under accelerated thermal aging.
doi_str_mv 10.1021/acs.chemmater.9b02530
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title Diketopyrrolopyrrole-Polymer Meets Thiol–Ene Click Chemistry: A Cross-Linked Acceptor for Thermally Stable Near-Infrared Photodetectors
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