Article Tunable Photodetectors via In Situ Thermal Conversion of TiS3 to TiO2

Foad Ghasemi ; Riccardo Frisenda ; Eduardo Flores ; Nikos Papadopoulos ; Robert Biele ; David Perez de Lara ; Herre S. J. van der Zant ; Kenji Watanabe SAMURAI ORCID (National Institute for Materials Science) ; Takashi Taniguchi SAMURAI ORCID (National Institute for Materials Science) ; Roberto D’Agosta ; Jose R. Ares ; Carlos Sánchez ; Isabel J. Ferrer ; Andres Castellanos-Gomez

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Foad Ghasemi, Riccardo Frisenda, Eduardo Flores, Nikos Papadopoulos, Robert Biele, David Perez de Lara, Herre S. J. van der Zant, Kenji Watanabe, Takashi Taniguchi, Roberto D’Agosta, Jose R. Ares, Carlos Sánchez, Isabel J. Ferrer, Andres Castellanos-Gomez. Tunable Photodetectors via In Situ Thermal Conversion of TiS3 to TiO2. Nanomaterials. 2020, 10 (4), 711. https://doi.org/10.3390/nano10040711
SAMURAI

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(abstract)

We investigate the controlled thermal oxidation of individual TiS3 nanoribbons and its influence on the optoelectronic properties of TiS3-based photodetectors. We study the oxidation of TiS3 in powder form and single nanoribbons deposited on a glass substrate. We find that an individual TiS3 nanoribbon converts to crystalline TiO2 in approximately 5 minutes when kept at temperatures larger than 300 ℃. Control experiments performed on TiS3 nanoribbons fully encapsulated between hBN flakes confirm that the direct contact between TiS3 and air is necessary for the oxidation process to happen. After establishing the change in material properties we demonstrate the controlled oxidation of a TiS3 nanoribbon photodetector that allows tuning the cut-off wavelength and sensitivity of the device.

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Keyword: Controlled oxidation, titanium trisulfide, band structure

Date published: 2020-04-09

Publisher: MDPI AG

Journal:

  • Nanomaterials (ISSN: 20794991) vol. 10 issue. 4 711

Funding:

  • European Commission CNECTICT-604391
  • Nederlandse Organisatie voor Wetenschappelijk Onderzoek 680-50-1515
  • European Union’s Horizon 2020 793318
  • MINECO FIS2016-79464-P
  • MINECO MAT2015-65203-R
  • Elemental Strategy Initiative JPMJCR15F3
  • Gobierno Vasco IT578-13

Manuscript type: Publisher's version (Version of record)

MDR DOI:

First published URL: https://doi.org/10.3390/nano10040711

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Updated at: 2025-02-26 16:30:19 +0900

Published on MDR: 2025-02-26 16:30:19 +0900

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