Exfoliated CrPS4 with Promising Photoconductivity

Budniak AK, Killilea NA, Zelewski SJ, Sytnyk M, Kauffmann Y, Amouyal Y, Kudrawiec R, Heiß W, Lifshitz E (2019)

Publication Type: Journal article

Publication year: 2019

Journal

Small Wiley-VCH Verlag

DOI: 10.1002/smll.201905924

Abstract

Layered semiconductors have attracted significant attention due to their diverse physical properties controlled by composition and the number of stacked layers. Herein, large crystals of the ternary layered semiconductor chromium thiophosphate (CrPS4) are prepared by a vapor transport synthesis. Optical properties are determined using photoconduction, absorption, photoreflectance, and photoacoustic spectroscopy exposing the semiconducting properties of the material. A simple, one-step protocol for mechanical exfoliation onto a transmission electron microscope grid is developed, and multiple layers are characterized by advanced electron microscopy methods, including atomic resolution elemental mapping confirming the structure by directly showing the positions of the columns of different elements' atoms. CrPS4 is also liquid exfoliated, and in combination with colloidal graphene, an ink-jet-printed photodetector is created. This all-printed graphene/CrPS4/graphene heterostructure detector demonstrates a specific detectivity of 8.3 x 10(8) (D*). This study shows a potential application of both bulk crystal and individual flakes of CrPS4 as active components in light detection, when introduced as ink-printable moieties with a large benefit for manufacturing.

Authors with CRIS profile

Niall Andrew Killilea Institute Materials for Electronics and Energy Technology (i-MEET) Mykhailo Sytnyk Institute Materials for Electronics and Energy Technology (i-MEET) Wolfgang Heiß Professur für Werkstoffwissenschaften (lösungsprozessierte Halbleitermaterialien)

Involved external institutions

Technion - Israel Institute of Technology IL Israel (IL) Wrocław University of Science and Technology / Politechnika Wrocławska PL Poland (PL)

How to cite

APA:

Budniak, A.K., Killilea, N.A., Zelewski, S.J., Sytnyk, M., Kauffmann, Y., Amouyal, Y.,... Lifshitz, E. (2019). Exfoliated CrPS4 with Promising Photoconductivity. Small. https://dx.doi.org/10.1002/smll.201905924

MLA:

Budniak, Adam K., et al. "Exfoliated CrPS4 with Promising Photoconductivity." Small (2019).

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