Defect Engineering of Two-Dimensional Molybdenum Disulfide

Chen X, Denninger P, Stimpel-Lindner T, Spiecker E, Duesberg GS, Backes C, Knirsch K, Hirsch A (2020)

Publication Type: Journal article

Publication year: 2020

Journal

Chemistry - A European Journal Wiley

DOI: 10.1002/chem.202000286

Abstract

Two-dimensional (2D) molybdenum disulfide (MoS2) holds great promise in electronic and optoelectronic applications owing to its unique structure and intriguing properties. The intrinsic defects such as sulfur vacancies (SVs) of MoS2 nanosheets are found to be detrimental to the device efficiency. To mitigate this problem, functionalization of 2D MoS2 using thiols has emerged as one of the key strategies for engineering defects. Herein, we demonstrate an approach to controllably engineer the SVs of chemically exfoliated MoS2 nanosheets using a series of substituted thiophenols in solution. The degree of functionalization can be tuned by varying the electron-withdrawing strength of substituents in thiophenols. We find that the intensity of 2LA(M) peak normalized to A1g peak strongly correlates to the degree of functionalization. Our results provide a spectroscopic indicator to monitor and quantify the defect engineering process. This method of MoS2 defect functionalization in solution also benefits the further exploration of defect-free MoS2 for a wide range of applications.

Authors with CRIS profile

Xin Chen Sonderforschungsbereich 953/3 Synthetische Kohlenstoffallotrope Peter Denninger Sonderforschungsbereich 953/3 Synthetische Kohlenstoffallotrope Erdmann Spiecker Lehrstuhl für Werkstoffwissenschaften (Mikro- und Nanostrukturforschung) Kathrin Knirsch Lehrstuhl für Organische Chemie II Andreas Hirsch Lehrstuhl für Organische Chemie II

Additional Organisation(s)

Graduiertenkolleg 1896/2 In situ Mikroskopie mit Elektronen, Röntgenstrahlen und Rastersonden Interdisziplinäres Zentrum, Center for Nanoanalysis and Electron Microscopy (CENEM) Lehrstuhl für Werkstoffwissenschaften (Mikro- und Nanostrukturforschung)

Related research project(s)

Aberration-Corrected High-Resolution and in situ Transmission Electron Microscopy of Carbon Allotropes and Related Device Structures (Z02) (SFB 953) SFB 953: Synthetic Carbon Allotropes (SFB 953) Jan. 1, 2012 - Jan. 1, 2015

Involved external institutions

Ruprecht-Karls-Universität Heidelberg DE Germany (DE) Universität der Bundeswehr München DE Germany (DE)

How to cite

APA:

Chen, X., Denninger, P., Stimpel-Lindner, T., Spiecker, E., Duesberg, G.S., Backes, C.,... Hirsch, A. (2020). Defect Engineering of Two-Dimensional Molybdenum Disulfide. Chemistry - A European Journal. https://doi.org/10.1002/chem.202000286

MLA:

Chen, Xin, et al. "Defect Engineering of Two-Dimensional Molybdenum Disulfide." Chemistry - A European Journal (2020).

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