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dc.contributor.authorKirmani, Ahmad R.
dc.contributor.authorWalters, Grant W.
dc.contributor.authorKim, Taesoo
dc.contributor.authorSargent, Edward H.
dc.contributor.authorAmassian, Aram
dc.date.accessioned2020-04-30T10:14:32Z
dc.date.available2020-04-30T10:14:32Z
dc.date.issued2020-04-27
dc.identifier.citationKirmani, A. R., Walters, G. W., Kim, T., Sargent, E. H., & Amassian, A. (2020). Optimizing Solid-State Ligand Exchange for Colloidal Quantum Dot Optoelectronics: How Much is Enough? ACS Applied Energy Materials. doi:10.1021/acsaem.0c00389
dc.identifier.issn2574-0962
dc.identifier.issn2574-0962
dc.identifier.doi10.1021/acsaem.0c00389
dc.identifier.urihttp://hdl.handle.net/10754/662689
dc.description.abstractProgress in chalcogenide and perovskite CQD optoelectronics has relied in significant part on solid-state ligand exchanges (SSEs): the replacement of initial insulating ligands with shorter conducting linkers on CQD surfaces. Herein we develop a mechanistic model of SSE employing 3-mercaptopropionic acid (MPA) and 1,2-ethanedithiol (EDT) as the linkers. The model suggests that optimal linker concentrations lead to efficient exchange resulting in ca. 200 –300 exchanged ligands per CQD, a 50% thickness reduction of the initial film, decreased interdot spacing, a 15 nm red-shift in the excitonic absorption peak and a 10x reduction in carrier lifetime. It is a combined effect of these physico-chemical changes that have traditionally made 1% MPA and 10-2% EDT (v:v) the concentrations of choice for efficient CQD optoelectronics.
dc.description.sponsorshipThe research reported in this publication was supported by funding from King Abdullah University of Science and Technology (KAUST). A.R.K. would like to acknowledge fruitful discussions with Matthew C. Beard, National Renewable Energy Laboratory (NREL), US.
dc.publisherAmerican Chemical Society (ACS)
dc.relation.urlhttps://pubs.acs.org/doi/10.1021/acsaem.0c00389
dc.rightsThis document is the Accepted Manuscript version of a Published Work that appeared in final form in ACS Applied Energy Materials, copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see https://pubs.acs.org/doi/10.1021/acsaem.0c00389.
dc.titleOptimizing Solid-State Ligand Exchange for Colloidal Quantum Dot Optoelectronics: How Much is Enough?
dc.typeArticle
dc.contributor.departmentAcademic Affairs
dc.contributor.departmentKAUST Solar Center (KSC)
dc.contributor.departmentMaterial Science and Engineering Program
dc.contributor.departmentOffice of the VP
dc.contributor.departmentOrganic Electronics and Photovoltaics Group
dc.contributor.departmentPhysical Science and Engineering (PSE) Division
dc.identifier.journalACS Applied Energy Materials
dc.eprint.versionPost-print
dc.contributor.institutionDepartment of Electrical and Computer Engineering, University of Toronto, Toronto, Ontario M5S 3G4, Canada.
dc.contributor.institutionDepartment of Materials Science and Engineering, North Carolina State University, Raleigh, NC 27695, USA.
kaust.personKirmani, Ahmad R.
kaust.personKim, Taesoo
kaust.personAmassian, Aram
refterms.dateFOA2020-04-30T10:15:18Z
dc.date.published-online2020-04-27
dc.date.published-print2020-06-22


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