Liquid phase exfoliation of MoS2 and WS2 in aqueous ammonia and their application in highly efficient organic solar cells
El Labban, Abdulrahman
Anjum, Dalaver H.
Anthopoulos, Thomas D.
KAUST DepartmentKAUST Solar Center (KSC)
Material Science and Engineering
Material Science and Engineering Program
Physical Science and Engineering (PSE) Division
KAUST Grant NumberOSR-2018-CARF/CCF-3079
Embargo End Date2021-03-16
Permanent link to this recordhttp://hdl.handle.net/10754/662707
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AbstractSimple, scalable and cost-effective synthesis of quality two-dimensional (2D) transition metal dichalcogenides (TMDs) is critical for fundamental investigations but also for the widespread adoption of these low-dimensional materials in an expanding range of device applications. Here, we report on the liquid-phase exfoliation (LPE) of molybdenum disulfide (MoS2) and tungsten disulfide (WS2) in aqueous ammonia (NH3(aq.)) as a greener alternative to commonly used but less environmentally friendly solvents. The synthesized nanosheets can be prepared in high concentrations (0.5-1 mg mL-1) and exhibit excellent stoichiometric and structural quality with a semiconducting character. These characteristics make them ideal for application in organic optoelectronics, where optical transparency and suitable energetics are two important prerequisites. When MoS2 and WS2 are used as the hole transport layer materials in organic photovoltaics, cells with a power conversion efficiency of 14.9 and 15.6%, respectively, are obtained, highlighting the potential of the aqueous ammonia-based LPE method for the preparation of high quality TMDs. The method could potentially be extended to other TMDs.
CitationAdilbekova, B., Lin, Y., Yengel, E., Faber, H., Harrison, G., Firdaus, Y., … Anthopoulos, T. D. (2020). Liquid phase exfoliation of MoS2 and WS2 in aqueous ammonia and their application in highly efficient organic solar cells. Journal of Materials Chemistry C, 8(15), 5259–5264. doi:10.1039/d0tc00659a
SponsorsThe authors acknowledge financial support from King Abdullah University of Science and Technology (KAUST). Part of this work was supported by the King Abdullah University of Science and Technology (KAUST) Office of Sponsored Research (OSR) under Award No: OSR-2018-CARF/CCF-3079.
PublisherRoyal Society of Chemistry (RSC)
JournalJournal of Materials Chemistry C
Except where otherwise noted, this item's license is described as Archived with thanks to Journal of Materials Chemistry C