Near-IR Absorbing Molecular Semiconductors Incorporating Cyanated Benzothiadiazole Acceptors for High-Performance Semitransparent n-Type Organic Field-Effect Transistors

Panagiota Kafourou; Mohamad Insan Nugraha; Aggelos Nikitaras; Luxi Tan; Yuliar Firdaus; Filip Aniés; Flurin Eisner; Bowen Ding; Jonas Wenzel; Martin Holicky; Leonidas Tsetseris; Thomas D. Anthopoulos; Martin Heeney

doi:10.1021/acsmaterialslett.1c00635

journal article·2022-01-03

Near-IR Absorbing Molecular Semiconductors Incorporating Cyanated Benzothiadiazole Acceptors for High-Performance Semitransparent n-Type Organic Field-Effect Transistors

Panagiota Kafourou, Mohamad Insan Nugraha, Aggelos Nikitaras, Luxi Tan, Yuliar Firdaus, Filip Aniés, Flurin Eisner, Bowen Ding, Jonas Wenzel, Martin Holicky, Leonidas Tsetseris, Thomas D. Anthopoulos, Martin Heeney

ACS Materials Letters· Volume 4· Issue 1

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Abstract

Small band gap molecular semiconductors are of interest for the development of transparent electronics. Here we report two near-infrared (NIR), n-type small molecule semiconductors, based upon an acceptor–donor–acceptor (A-D-A) approach. We show that the inclusion of molecular spacers between the strong-electron-accepting end group, 2,1,3-benzothiadiazole-4,5,6-tricarbonitrile, and the donor core affords semiconductors with very low band gaps down to 1 eV. Both materials were synthesized by a one-pot, 6-fold nucleophilic displacement of a fluorinated precursor by cyanide. Significant differences in solid-state ordering and charge carrier mobility are observed depending on the nature of the spacer, with a thiophene spacer resulting in solution processed organic field-effect transistors (OFETs) exhibiting excellent electron mobility up to 1.1 cm2 V–1 s–1. The use of silver nanowires as the gate electrode enables the fabrication of a semitransparent OFET device with an average visible transmission of 71% in the optical spectrum.

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Research context

Nanomaterials Electronic materials

OpenAlex topics: Organic Electronics and Photovoltaics · Conducting polymers and applications · Organic Light-Emitting Diodes Research

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Department of Chemistry and Centre for Processable Electronics, Imperial College London, London W12 0BZ, U.K.

King Abdullah University of Science and Technology (KAUST), KAUST Solar Center (KSC), Physical Science and Engineering Division (PSE), Thuwal 23955-6900, Kingdom of Saudi Arabia

Department of Physics, National Technical University of Athens, Zografou Campus, Athens 15780, Greece

School of Chemistry and Chemical Engineering, Chongqing University, Chongqing 401331, China

Research Center for Electronics and Telecommunication, National Research and Innovation Agency, Jalan Sangkuriang Komplek LIPI Building 20 Level 4, Bandung 40135, Indonesia

Department of Physics and Centre for Processable Electronics, Imperial College London, London W12 0BZ, U.K.

Funding

Research Councils UK · Royal Society · National Research Foundation of Korea · Wolfson Foundation · Office of Sponsored Research, King Abdullah University of Science and Technology · EPSRC

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