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dc.contributor.authorWang, Linen_US
dc.contributor.authorLiu, Baiquanen_US
dc.contributor.authorZhao, Xinen_US
dc.contributor.authorDemir, Hilmi Volkanen_US
dc.contributor.authorGu, Haoshuangen_US
dc.contributor.authorSun, Handongen_US
dc.identifier.citationWang, L., Liu, B., Zhao, X., Demir, H. V., Gu, H., & Sun, H. (2018). Solvent-assisted surface engineering for high-performance all-inorganic perovskite nanocrystal light-emitting diodes. ACS Applied Materials and Interfaces, 10(23),19828–19835. doi:10.1021/acsami.8b06105en_US
dc.description.abstractAll-inorganic cesium halide perovskite nanocrystals have attracted much interest in optoelectronic applications for the sake of the readily adjustable band gaps, high photoluminescence quantum yield, pure color emission, and affordable cost. However, because of the ineluctable utilization of organic surfactants during the synthesis, the structural and optical properties of CsPbBr3 nanocrystals degrade upon transforming from colloidal solutions to solid thin films, which plagues the device operation. Here, we develop a novel solvent-assisted surface engineering strategy, producing high-quality CsPbBr3 thin films for device applications. A good solvent is first introduced as an assembly trigger to conduct assembly in a one-dimensional direction, which is then interrupted by adding a nonsolvent. The nonsolvent drives the adjacent nanoparticles connecting in a two-dimensional direction. Assembled CsPbBr3 nanocrystal thin films are densely packed and very smooth with a surface roughness of ∼4.8 nm, which is highly desirable for carrier transport in a light-emitting diode (LED) device. Meanwhile, the film stability is apparently improved. Benefiting from this facile and reliable strategy, we have achieved remarkably improved performance of CsPbBr3 nanocrystal-based LEDs. Our results not only enrich the methods of nanocrystal surface engineering but also shed light on developing high-performance LEDs.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.relationTier 1-RG105/16en_US
dc.relationTier 1-RG92/15en_US
dc.relationNRF-CRP14-2014- 03en_US
dc.relation152 73 00025en_US
dc.relation.ispartofACS Applied Materials and Interfacesen_US
dc.rightsThis document is the Accepted Manuscript version of a Published Work that appeared in final form in ACS Applied Materials and Interfaces, copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see
dc.subjectEngineering::Electrical and electronic engineeringen_US
dc.titleSolvent-assisted surface engineering for high-performance all-inorganic perovskite nanocrystal light-emitting diodesen_US
dc.typeJournal Articleen
dc.contributor.schoolSchool of Electrical and Electronic Engineeringen_US
dc.contributor.schoolSchool of Physical and Mathematical Sciencesen_US
dc.contributor.organizationLUMINOUS! Center of Excellence for Semiconductor Lighting and Displaysen_US
dc.contributor.organizationCentre for Disruptive Photonic Technologiesen_US
dc.description.versionAccepted versionen_US
dc.subject.keywordsSolvent Engineeringen_US
dc.description.acknowledgementThis work was supported by the Singapore Ministry of Education through the Academic Research Fund under Projects MOE2016-T2-1-054, Tier 1-RG105/16 and Tier 1-RG92/15 and China Scholarship Council (20163100, no. 201608420137). Thanks to the support of the National Research Foundation, Prime Minister’s Office, Singapore under its Competitive Research program (NRF-CRP14-2014- 03), its Investigatorship program (NRF-NRFI2016-08) and the Singapore Agency for Science, Technology and Research (A*STAR) SERC Pharos Program under grant no. 152 73 00025. H.V.D. gratefully acknowledges TUBA-GEBIP.en_US
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