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dc.contributor.authorZhang, Yuhai
dc.contributor.authorSinatra, Lutfan
dc.contributor.authorAlarousu, Erkki
dc.contributor.authorYin, Jun
dc.contributor.authorEl-Zohry, Ahmed M.
dc.contributor.authorBakr, Osman
dc.contributor.authorMohammed, Omar F.
dc.date.accessioned2018-04-24T07:48:29Z
dc.date.available2018-04-24T07:48:29Z
dc.date.issued2018-02-23
dc.identifier.citationZhang Y, Sinatra L, Alarousu E, Yin J, El-Zohry AM, et al. (2018) Ligand-Free Nanocrystals of Highly Emissive Cs4PbBr6 Perovskite. The Journal of Physical Chemistry C 122: 6493–6498. Available: http://dx.doi.org/10.1021/acs.jpcc.8b01735.
dc.identifier.issn1932-7447
dc.identifier.issn1932-7455
dc.identifier.doi10.1021/acs.jpcc.8b01735
dc.identifier.urihttp://hdl.handle.net/10754/627632
dc.description.abstractAlthough ligands of long carbon chains are very crucial to form stable colloidal perovskite nanocrystals (NCs), they create a severe barrier for efficient charge injection or extraction in quantum-dot-based optoelectronics, such as light emitting diode or solar cell. Here, we report a new approach to preparing ligand-free perovskite NCs of CsPbBr, which retained high photoluminescence quantum yield (44%). Such an approach involves a polar solvent (acetonitrile) and two small molecules (ammonium acetate and cesium chloride), which replace the organic ligand and still protect the nanocrystals from dissolution. The successful removal of hydrophobic long ligands was evidenced by Fourier transform infrared spectroscopy, ζ potential analysis, and thermogravimetric analysis. Unlike conventional perovskite NCs that are extremely susceptible to polar solvents, the ligand-free CsPbBr NCs show robust resistance to polar solvents. Our ligand-free procedure opens many possibilities not only from a material hybridization perspective but also in optimizing charge injection and extraction in semiconductor quantum-dot-based optoelectronics applications.
dc.description.sponsorshipThis work was financially supported by King Abdullah University of Science and Technology (KAUST).
dc.publisherAmerican Chemical Society (ACS)
dc.relation.urlhttps://pubs.acs.org/doi/10.1021/acs.jpcc.8b01735
dc.titleLigand-Free Nanocrystals of Highly Emissive Cs4PbBr6 Perovskite
dc.typeArticle
dc.contributor.departmentChemical Science Program
dc.contributor.departmentFunctional Nanomaterials Lab (FuNL)
dc.contributor.departmentKAUST Catalysis Center (KCC)
dc.contributor.departmentKAUST Solar Center (KSC)
dc.contributor.departmentMaterial Science and Engineering Program
dc.contributor.departmentPhysical Science and Engineering (PSE) Division
dc.contributor.departmentUltrafast Laser Spectroscopy and Four-dimensional Electron Imaging Research Group
dc.identifier.journalThe Journal of Physical Chemistry C
dc.contributor.institutionInstitute for Advanced Interdisciplinary Research (IAIR), University of Jinan, Jinan 250022, Shandong, China
kaust.personZhang, Yuhai
kaust.personSinatra, Lutfan
kaust.personAlarousu, Erkki
kaust.personYin, Jun
kaust.personEl-Zohry, Ahmed
kaust.personBakr, Osman M.
kaust.personMohammed, Omar F.
dc.date.published-online2018-02-23
dc.date.published-print2018-03-22


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