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dc.contributor.authorLi, Zhaojun
dc.contributor.authorBretscher, Hope
dc.contributor.authorZhang, Yunwei
dc.contributor.authorDelport, Géraud
dc.contributor.authorXiao, James
dc.contributor.authorLee, Alpha
dc.contributor.authorStranks, Samuel D.
dc.contributor.authorRao, Akshay
dc.date.accessioned2021-10-18T15:28:18Z
dc.date.available2021-10-18T15:28:18Z
dc.date.issued2021-10-18
dc.date.submitted2021-06-02
dc.identifier.others41467-021-26340-6
dc.identifier.other26340
dc.identifier.urihttps://www.repository.cam.ac.uk/handle/1810/329573
dc.descriptionFunder: RCUK | Engineering and Physical Sciences Research Council (EPSRC); doi: https://doi.org/10.13039/501100000266
dc.descriptionFunder: funding from the Royal society through a Newton international fellowship
dc.descriptionFunder: the Winton programme for the physics of sustainability
dc.descriptionFunder: The Royal society and Tata group. The Royal society funding through a Newton international fellowship. The Winton programme for the physics of sustainability.
dc.description.abstractAbstract: There is a growing interest in obtaining high quality monolayer transition metal disulfides for optoelectronic applications. Surface treatments using a range of chemicals have proven effective to improve the photoluminescence yield of these materials. However, the underlying mechanism for the photoluminescence enhancement is not clear, which prevents a rational design of passivation strategies. Here, a simple and effective approach to significantly enhance the photoluminescence is demonstrated by using a family of cation donors, which we show to be much more effective than commonly used p-dopants. We develop a detailed mechanistic picture for the action of these cation donors and demonstrate that one of them, bis(trifluoromethane)sulfonimide lithium salt (Li-TFSI), enhances the photoluminescence of both MoS2 and WS2 to a level double that of the currently best performing super-acid trifluoromethanesulfonimide (H-TFSI) treatment. In addition, the ionic salts used in our treatments are compatible with greener solvents and are easier to handle than super-acids, providing the possibility of performing treatments during device fabrication. This work sets up rational selection rules for ionic chemicals to passivate transition metal disulfides and increases their potential in practical optoelectronic applications.
dc.languageen
dc.publisherNature Publishing Group UK
dc.subjectArticle
dc.subject/639/301/1005/1007
dc.subject/639/925/357/1018
dc.subject/132
dc.subject/140/125
dc.subject/128
dc.subject/140/146
dc.subject/140/133
dc.subject/119/118
dc.subjectarticle
dc.titleMechanistic insight into the chemical treatments of monolayer transition metal disulfides for photoluminescence enhancement
dc.typeArticle
dc.date.updated2021-10-18T15:28:16Z
prism.issueIdentifier1
prism.publicationNameNature Communications
prism.volume12
dc.identifier.doi10.17863/CAM.77021
dcterms.dateAccepted2021-09-17
rioxxterms.versionofrecord10.1038/s41467-021-26340-6
rioxxterms.versionVoR
rioxxterms.licenseref.urihttp://creativecommons.org/licenses/by/4.0/
dc.contributor.orcidLi, Zhaojun [0000-0003-2651-1717]
dc.contributor.orcidBretscher, Hope [0000-0001-6551-4721]
dc.contributor.orcidZhang, Yunwei [0000-0001-7856-9190]
dc.contributor.orcidDelport, Géraud [0000-0003-3882-2782]
dc.contributor.orcidLee, Alpha [0000-0002-9616-3108]
dc.contributor.orcidStranks, Samuel D. [0000-0002-8303-7292]
dc.contributor.orcidRao, Akshay [0000-0003-4261-0766]
dc.identifier.eissn2041-1723
pubs.funder-project-idVetenskapsrådet (Swedish Research Council) (2018-06610)
pubs.funder-project-idRoyal Society (UF150033)
pubs.funder-project-idEC | EU Framework Programme for Research and Innovation H2020 | H2020 Priority Excellent Science | H2020 European Research Council (H2020 Excellent Science - European Research Council) (758826, 756962)


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