Beyond Gold: Spin-Coated Ti C -Based MXene Photodetectors.

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2019
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Abstract
2D transition metal carbides, known as MXenes, are transparent when the samples are thin enough. They are also excellent electrical conductors with metal-like carrier concentrations. Herein, these characteristics are exploited to replace gold (Au) in GaAs photodetectors. By simply spin-coating transparent Ti C -based MXene electrodes from aqueous suspensions onto GaAs patterned with a photoresist and lifted off with acetone, photodetectors that outperform more standard Au electrodes are fabricated. Both the Au- and MXene-based devices show rectifying contacts with comparable Schottky barrier heights and internal electric fields. The latter, however, exhibit significantly higher responsivities and quantum efficiencies, with similar dark currents, hence showing better dynamic range and detectivity, and similar sub-nanosecond response speeds compared to the Au-based devices. The simple fabrication process is readily integratable into microelectronic, photonic-integrated circuits and silicon photonics processes, with a wide range of applications from optical sensing to light detection and ranging and telecommunications.
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montazeri2019beyondadvanced Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Montazeri, Kiana;Currie, Marc;Verger, Louisiane;Dianat, Pouya;Barsoum, Michel W;Nabet, Bahram;
Journal advanced materials (deerfield beach, fla)
Year 2019
DOI
10.1002/adma.201903271
URL
Keywords
mxene semiconductors photodetectors schottky contacts metal-semiconductor-metal work-function

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