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

被引：21
|
作者：
Casutt, Manuela [1 ,2 ,3 ]
Ruscello, Marta [2 ]
Strobel, Noah [2 ,4 ]
Koser, Silke [1 ]
Bunz, Uwe H. F. [1 ,5 ]
Jaensch, Daniel [1 ,2 ]
Freudenberg, Jan [1 ,2 ]
Hernandez-Sosa, Gerardo [2 ,4 ]
Muellen, Klaus [3 ]
机构：
[1] Heidelberg Univ, Organ Chem Inst, Neuenheimer Feld 270, D-69120 Heidelberg, Germany
[2] InnovationLab, Speyerer Str 4, D-69115 Heidelberg, Germany
[3] Max Planck Inst Polymer Res, Ackermannweg 10, D-55128 Mainz, Germany
[4] Karlsruhe Inst Technol, Light Technol Inst, Engesserstr 13, D-76131 Karlsruhe, Germany
[5] Heidelberg Univ, Ctr Adv Mat, Neuenheimer Feld 225, D-69120 Heidelberg, Germany
来源：
CHEMISTRY OF MATERIALS | 2019年 / 31卷 / 18期
基金：
欧盟地平线“2020”;
关键词：
LOW-BANDGAP POLYMERS; SOLAR-CELLS; AVALANCHE PHOTODIODES; ORGANIC PHOTODETECTOR; PHASE-SEPARATION; PERFORMANCE; MORPHOLOGY; STABILIZATION; RECOMBINATION; EFFICIENCY;
D O I：
10.1021/acs.chemmater.9b02530
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
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 omega-alkenyl side chains. Due to its absorption cutoff above 1000 nm we employed it as an acceptor material in a solution-processed BHJ nearinfrared-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.
引用
收藏
页码：7657 / 7665
页数：9
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