Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/156909
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dc.contributor.authorZhang, Zitongen_US
dc.contributor.authorThung, Yi Tianen_US
dc.contributor.authorWang, Linen_US
dc.contributor.authorChen, Xiaoxuanen_US
dc.contributor.authorDing, Luen_US
dc.contributor.authorFan, Weijunen_US
dc.contributor.authorSun, Handongen_US
dc.date.accessioned2022-05-09T00:42:05Z-
dc.date.available2022-05-09T00:42:05Z-
dc.date.issued2021-
dc.identifier.citationZhang, Z., Thung, Y. T., Wang, L., Chen, X., Ding, L., Fan, W. & Sun, H. (2021). Surface depletion effects in bromide-ligated colloidal cadmium selenide nanoplatelets: toward efficient emission at high temperature. Journal of Physical Chemistry Letters, 12(37), 9086-9093. https://dx.doi.org/10.1021/acs.jpclett.1c02623en_US
dc.identifier.issn1948-7185en_US
dc.identifier.urihttps://hdl.handle.net/10356/156909-
dc.description.abstractThe colloidal semiconductor nanoplatelet (NPL) with broad ligand-semiconductor interface is an ideal system for surface science investigation, but the study regarding depletion effects in NPLs remains lacking. Herein we explore such effects in colloidal CdSe NPLs through Br ligation. Apart from improved brightness and red-shifted optical features, we also experimentally observed abnormal negative thermal quenching phenomena in bromideligated CdSe NPLs over 200 K under a cryogenic environment and up to 383 K under an ambient environment, which was absent in pristine NPLs. We speculate that the surface depletion effect shall account for these anomalous phenomena due to the susceptibility of the surface depletion region on photoexcited carrier concentration and surface condition. The existence of the depletion layer in NPLs is also validated quantitatively with k·p simulation. Besides offering an alternative explanation on the red-shifted optical properties of CdSe NPLs by Br-ligation, our findings pave the new route toward solution-processed NPLs-based optoelectronics with boosted thermal resistance.en_US
dc.description.sponsorshipAgency for Science, Technology and Research (A*STAR)en_US
dc.description.sponsorshipMinistry of Education (MOE)en_US
dc.description.sponsorshipNational Research Foundation (NRF)en_US
dc.language.isoenen_US
dc.relationNRF-CRP21-2018-0092en_US
dc.relationNRFCRP23-2019-0007en_US
dc.relationAME-IRGA20E5c0083en_US
dc.relationRG95/19 (S)en_US
dc.relation.ispartofJournal of Physical Chemistry Lettersen_US
dc.rightsThis document is the Accepted Manuscript version of a Published Work that appeared in final form in Journal of Physical Chemistry Letters, copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see https://doi.org/10.1021/acs.jpclett.1c02623.en_US
dc.subjectEngineering::Materials::Photonics and optoelectronics materialsen_US
dc.titleSurface depletion effects in bromide-ligated colloidal cadmium selenide nanoplatelets: toward efficient emission at high temperatureen_US
dc.typeJournal Articleen
dc.contributor.schoolSchool of Physical and Mathematical Sciencesen_US
dc.contributor.schoolSchool of Electrical and Electronic Engineeringen_US
dc.identifier.doi10.1021/acs.jpclett.1c02623-
dc.description.versionSubmitted/Accepted versionen_US
dc.identifier.issue37en_US
dc.identifier.volume12en_US
dc.identifier.spage9086en_US
dc.identifier.epage9093en_US
dc.subject.keywordsColloidal Nanostrucruresen_US
dc.subject.keywordsDepletion Regionen_US
dc.subject.keywordsSurface Trapsen_US
dc.subject.keywordsHalide Treatmenten_US
dc.subject.keywordsThermal Quenchingen_US
dc.description.acknowledgementThis work was supported by NRF-CRP21-2018-0092 and NRFCRP23-2019-0007, A*STAR, under project AME-IRGA20E5c0083 and Ministry of Education Singapore through the Academic Research Fund under Projects MOE Tier 1 RG95/19 (S).en_US
item.fulltextWith Fulltext-
item.grantfulltextembargo_20220930-
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