Liquid phase exfoliation of MoS2 and WS2 in aqueous ammonia and their application in highly efficient organic solar cells
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ArticleAuthors
Adilbekova, Begimai
Lin, Yuanbao
Yengel, Emre

Faber, Hendrik

Harrison, George
Firdaus, Yuliar

El Labban, Abdulrahman

Anjum, Dalaver H.
Tung, Vincent

Anthopoulos, Thomas D.

KAUST Department
KAUST Solar Center (KSC)Material Science and Engineering
Material Science and Engineering Program
Physical Science and Engineering (PSE) Division
KAUST Grant Number
OSR-2018-CARF/CCF-3079Date
2020Embargo End Date
2021-03-16Submitted Date
2020-02-08Permanent link to this record
http://hdl.handle.net/10754/662707
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Simple, 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.Citation
Adilbekova, 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/d0tc00659aSponsors
The 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.Publisher
Royal Society of Chemistry (RSC)Journal
Journal of Materials Chemistry CAdditional Links
http://xlink.rsc.org/?DOI=D0TC00659Ahttps://pubs.rsc.org/en/content/articlepdf/2020/tc/d0tc00659a
ae974a485f413a2113503eed53cd6c53
10.1039/d0tc00659a
Scopus Count
Except where otherwise noted, this item's license is described as Archived with thanks to Journal of Materials Chemistry C