A Low-Power CuSCN Hydrogen Sensor Operating Reversibly at Room Temperature

Viktoras Kabitakis, Emmanouil Gagaoudakis, Marilena Moschogiannaki, George Kiriakidis, Akmaral Seitkhan, Yuliar Firdaus, Hendrik Faber, Emre Yengel, Kalaivanan Loganathan, George Deligeorgis, Leonidas Tsetseris, Thomas D. Anthopoulos, Vassilios Binas

Research output: Contribution to journalArticlepeer-review

5 Scopus citations

Abstract

Hydrogen is attractive as an abundant source for clean and renewable energy. However, due to its highly flammable nature in a range of concentrations, the need for reliable and sensitive sensor/monitoring technologies has become acute. Here a solid-state hydrogen sensor based on solution-processable p-type semiconductor copper thiocyanate (CuSCN) is developed and studied. Sensors incorporating interdigitated electrodes made of noble metals (gold, platinum, palladium) show excellent response to hydrogen concentration down to 200 ppm while simultaneously being able to operate reversibly at room temperature and at low power. Sensors incorporating Pd electrodes show the highest signal response of 179% with a response time of ≈400 s upon exposure to 1000 ppm of hydrogen gas. The experimental findings are corroborated by density functional theory calculations, which highlight the role of atomic hydrogen species created upon interaction with the noble metal electrode as the origin for the increased p-type conductivity of CuSCN during exposure. The work highlights CuSCN as a promising sensing element for low-power, all-solid-state printed hydrogen sensors.
Original languageEnglish (US)
Pages (from-to)2102635
JournalAdvanced Functional Materials
DOIs
StatePublished - Nov 6 2021

Bibliographical note

KAUST Repository Item: Exported on 2021-11-11
Acknowledged KAUST grant number(s): OSR-2018-CARF/CCF-3079.
Acknowledgements: Part of this work was financially supported by the Stavros Niarchos Foundation within the framework of the project ARCHERS (“Advancing Young Researchers’ Human Capital in Cutting Edge Technologies in the Preservation of Cultural Heritage and the Tackling of Societal Challenges”). Moreover, the authors acknowledge support of this work by the project “National Research Infrastructure on nanotechnology, advanced materials and micro/nanoelectronics (MIS 5002772)" which is implemented under the “Action for the Strategic Development on the Research and Technological Sector,” funded by the Operational Programme “Competitiveness, Entrepreneurship and Innovation” (NSRF 2014–2020) and co-financed by Greece and the European Union (European Regional Development Fund). This publication is based upon work supported by the King Abdullah University of Science and Technology (KAUST) Office of Sponsored Research (OSR) under Award No: OSR-2018-CARF/CCF-3079. The calculations used computational time granted from GRNET in the National HPC facility, ARIS, under project 9016-CREAM.

ASJC Scopus subject areas

  • Biomaterials
  • Electrochemistry
  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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