Highly Efficient Visible Colloidal Lead-Halide Perovskite Nanocrystal Light-Emitting Diodes
buir.contributor.author | Demir, Hilmi Volkan | |
buir.contributor.orcid | Demir, Hilmi Volkan|0000-0003-1793-112X | |
dc.citation.epage | 3164 | en_US |
dc.citation.issueNumber | 5 | en_US |
dc.citation.spage | 3157 | en_US |
dc.citation.volumeNumber | 18 | en_US |
dc.contributor.author | Yan, F. | en_US |
dc.contributor.author | Xing, J. | en_US |
dc.contributor.author | Xing, G. | en_US |
dc.contributor.author | Quan, L. | en_US |
dc.contributor.author | Tan S.T. | en_US |
dc.contributor.author | Zhao, J. | en_US |
dc.contributor.author | Su, R. | en_US |
dc.contributor.author | Zhang, L. | en_US |
dc.contributor.author | Chen, S. | en_US |
dc.contributor.author | Zhao Y. | en_US |
dc.contributor.author | Huan, A. | en_US |
dc.contributor.author | Sargent, E. H. | en_US |
dc.contributor.author | Xiong, Q. | en_US |
dc.contributor.author | Demir, Hilmi Volkan | en_US |
dc.date.accessioned | 2019-02-21T16:02:18Z | |
dc.date.available | 2019-02-21T16:02:18Z | |
dc.date.issued | 2018 | en_US |
dc.department | Department of Electrical and Electronics Engineering | en_US |
dc.department | Department of Physics | en_US |
dc.department | Institute of Materials Science and Nanotechnology (UNAM) | en_US |
dc.description.abstract | Lead-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.provenance | Made available in DSpace on 2019-02-21T16:02:18Z (GMT). No. of bitstreams: 1 Bilkent-research-paper.pdf: 222869 bytes, checksum: 842af2b9bd649e7f548593affdbafbb3 (MD5) Previous issue date: 2018 | en |
dc.description.sponsorship | This 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.doi | 10.1021/acs.nanolett.8b00789 | |
dc.identifier.issn | 1530-6984 | |
dc.identifier.uri | http://hdl.handle.net/11693/49990 | |
dc.language.iso | English | |
dc.publisher | American Chemical Society | |
dc.relation.isversionof | https://doi.org/10.1021/acs.nanolett.8b00789 | |
dc.relation.project | National 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.title | Nano Letters | en_US |
dc.subject | Colloidal nanocrystal | en_US |
dc.subject | Lead-halide perovskite | en_US |
dc.subject | Light-emitting diodes | en_US |
dc.title | Highly Efficient Visible Colloidal Lead-Halide Perovskite Nanocrystal Light-Emitting Diodes | en_US |
dc.type | Article | en_US |
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