Highly Efficient Visible Colloidal Lead-Halide Perovskite Nanocrystal Light-Emitting Diodes

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buir.contributor.authorDemir, Hilmi Volkan
buir.contributor.orcidDemir, Hilmi Volkan|0000-0003-1793-112X
dc.citation.epage3164en_US
dc.citation.issueNumber5en_US
dc.citation.spage3157en_US
dc.citation.volumeNumber18en_US
dc.contributor.authorYan, F.en_US
dc.contributor.authorXing, J.en_US
dc.contributor.authorXing, G.en_US
dc.contributor.authorQuan, L.en_US
dc.contributor.authorTan S.T.en_US
dc.contributor.authorZhao, J.en_US
dc.contributor.authorSu, R.en_US
dc.contributor.authorZhang, L.en_US
dc.contributor.authorChen, S.en_US
dc.contributor.authorZhao Y.en_US
dc.contributor.authorHuan, A.en_US
dc.contributor.authorSargent, E. H.en_US
dc.contributor.authorXiong, Q.en_US
dc.contributor.authorDemir, Hilmi Volkanen_US
dc.date.accessioned2019-02-21T16:02:18Z
dc.date.available2019-02-21T16:02:18Z
dc.date.issued2018en_US
dc.departmentDepartment of Electrical and Electronics Engineeringen_US
dc.departmentDepartment of Physicsen_US
dc.departmentInstitute of Materials Science and Nanotechnology (UNAM)en_US
dc.description.abstractLead-halide perovskites have been attracting attention for potential use in solid-state lighting. Following the footsteps of solar cells, the field of perovskite light-emitting diodes (PeLEDs) has been growing rapidly. Their application prospects in lighting, however, remain still uncertain due to a variety of shortcomings in device performance including their limited levels of luminous efficiency achievable thus far. Here we show high-efficiency PeLEDs based on colloidal perovskite nanocrystals (PeNCs) synthesized at room temperature possessing dominant first-order excitonic radiation (enabling a photoluminescence quantum yield of 71% in solid film), unlike in the case of bulk perovskites with slow electron-hole bimolecular radiative recombination (a second-order process). In these PeLEDs, by reaching charge balance in the recombination zone, we find that the Auger nonradiative recombination, with its significant role in emission quenching, is effectively suppressed in low driving current density range. In consequence, these devices reach a maximum external quantum efficiency of 12.9% and a power efficiency of 30.3 lm W-1 at luminance levels above 1000 cd m-2 as required for various applications. These findings suggest that, with feasible levels of device performance, the PeNCs hold great promise for their use in LED lighting and displays.
dc.description.sponsorshipThis research is supported by the National Research Foundation, Prime Minister’s Office, Singapore under its competitive Research Programme (CRP Award No. NRF-CRP14-2014-03). H.V.D. gratefully acknowledges the financial support from NRF Investigatorship Grant No. NRF-NRFI2016-08 and additional support from TUBA. Q.H.X. acknowledges financial support from Singapore National Foundation via an Investigatorship Award (NRF-NRFI2015-03) and Singapore Ministry of Education through grants (MOE2015-T2-1-047 and MOE2015-T1-001-175). G.C.X. acknowledges financial support from the Science and Technology Development Fund from Macau SAR (FDCT-116/2016/A3, FDCT-091/2017/A2), Start-up Research Grant (SRG2016-00087-FST) from Research & Development Office at University of Macau, and the Natural Science Foundation of China (91733302, 61605073, 2015CB932200).
dc.identifier.doi10.1021/acs.nanolett.8b00789
dc.identifier.issn1530-6984
dc.identifier.urihttp://hdl.handle.net/11693/49990
dc.language.isoEnglish
dc.publisherAmerican Chemical Society
dc.relation.isversionofhttps://doi.org/10.1021/acs.nanolett.8b00789
dc.relation.projectNational Research Foundation Singapore, NRF: NRF-NRFI2015-03 - NRF-NRFI2016-08 - NRF-CRP14-2014-03 - School for Advanced Research, SAR: FDCT-091/2017/A2 - School for Advanced Research, SAR: FDCT-116/2016/A3 - School for Advanced Research, SAR: SRG2016-00087-FST - Ministry of Education - Singapore, MOE: MOE2015-T1-001-175 - Ministry of Education - Singapore, MOE: MOE2015-T2-1-047 - Science and Technology Development Fund, STDF - National Research Foundation, NRF - National Natural Science Foundation of China, NSFC: 2015CB932200 - National Natural Science Foundation of China, NSFC: 61605073 - National Natural Science Foundation of China, NSFC: 91733302
dc.source.titleNano Lettersen_US
dc.subjectColloidal nanocrystalen_US
dc.subjectLead-halide perovskiteen_US
dc.subjectLight-emitting diodesen_US
dc.titleHighly Efficient Visible Colloidal Lead-Halide Perovskite Nanocrystal Light-Emitting Diodesen_US
dc.typeArticleen_US

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Department of Electrical and Electronics Engineering
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Institute of Materials Science and Nanotechnology (UNAM)