Tailoring the Energy Landscape in Quasi-2D Halide Perovskites Enables Efficient Green-Light Emission

Handle URI:
http://hdl.handle.net/10754/623655
Title:
Tailoring the Energy Landscape in Quasi-2D Halide Perovskites Enables Efficient Green-Light Emission
Authors:
Quan, Li Na ( 0000-0001-9301-3764 ) ; Zhao, Yongbiao; García de Arquer, F. Pelayo; Sabatini, Randy; Walters, Grant; Voznyy, Oleksandr ( 0000-0002-8656-5074 ) ; Comin, Riccardo; Li, Yiying; Fan, James Z.; Tan, Hairen ( 0000-0003-0821-476X ) ; Pan, Jun; Yuan, Mingjian; Bakr, Osman M. ( 0000-0002-3428-1002 ) ; Lu, Zhenghong ( 0000-0003-2050-0822 ) ; Kim, Dong Ha ( 0000-0003-0444-0479 ) ; Sargent, Edward H.
Abstract:
Organo-metal halide perovskites are a promising platform for optoelectronic applications in view of their excellent charge-transport and bandgap tunability. However, their low photoluminescence quantum efficiencies, especially in low-excitation regimes, limit their efficiency for light emission. Consequently, perovskite light-emitting devices are operated under high injection, a regime under which the materials have so far been unstable. Here we show that, by concentrating photoexcited states into a small subpopulation of radiative domains, one can achieve a high quantum yield, even at low excitation intensities. We tailor the composition of quasi-2D perovskites to direct the energy transfer into the lowest-bandgap minority phase and to do so faster than it is lost to nonradiative centers. The new material exhibits 60% photoluminescence quantum yield at excitation intensities as low as 1.8 mW/cm2, yielding a ratio of quantum yield to excitation intensity of 0.3 cm2/mW; this represents a decrease of 2 orders of magnitude in the excitation power required to reach high efficiency compared with the best prior reports. Using this strategy, we report light-emitting diodes with external quantum efficiencies of 7.4% and a high luminescence of 8400 cd/m2.
KAUST Department:
Materials Science and Engineering Program
Citation:
Quan LN, Zhao Y, García de Arquer FP, Sabatini R, Walters G, et al. (2017) Tailoring the Energy Landscape in Quasi-2D Halide Perovskites Enables Efficient Green-Light Emission. Nano Letters. Available: http://dx.doi.org/10.1021/acs.nanolett.7b00976.
Publisher:
American Chemical Society (ACS)
Journal:
Nano Letters
KAUST Grant Number:
KUS-11-009-21
Issue Date:
10-May-2017 ; 5-May-2017
DOI:
10.1021/acs.nanolett.7b00976
Type:
Article
ISSN:
1530-6984; 1530-6992; 1530-6984; 1530-6992
Sponsors:
This publication is based in part on work supported by award no. KUS-11-009-21, made by King Abdullah University of Science and Technology (KAUST), by the Ontario Research Fund Research Excellence Program and by the Natural Sciences and Engineering Research Council (NSERC) of Canada. L.N.Q. and D.H.K. acknowledge the financial support by National Research Foundation of Korea Grant funded by the Korean Government (2014R1A2A1A09005656 and 2015M1A2A2058365). F.P.G.d.A. acknowledges financial support from the Connaught fund.
Additional Links:
http://pubs.acs.org/doi/full/10.1021/acs.nanolett.7b00976
Appears in Collections:
Articles; Materials Science and Engineering Program

Full metadata record

DC FieldValue Language
dc.contributor.authorQuan, Li Naen
dc.contributor.authorZhao, Yongbiaoen
dc.contributor.authorGarcía de Arquer, F. Pelayoen
dc.contributor.authorSabatini, Randyen
dc.contributor.authorWalters, Granten
dc.contributor.authorVoznyy, Oleksandren
dc.contributor.authorComin, Riccardoen
dc.contributor.authorLi, Yiyingen
dc.contributor.authorFan, James Z.en
dc.contributor.authorTan, Hairenen
dc.contributor.authorPan, Junen
dc.contributor.authorYuan, Mingjianen
dc.contributor.authorBakr, Osman M.en
dc.contributor.authorLu, Zhenghongen
dc.contributor.authorKim, Dong Haen
dc.contributor.authorSargent, Edward H.en
dc.date.accessioned2017-05-17T11:53:17Z-
dc.date.available2017-05-17T11:53:17Z-
dc.date.issued2017-05-10-
dc.date.issued2017-05-05en
dc.identifier.citationQuan LN, Zhao Y, García de Arquer FP, Sabatini R, Walters G, et al. (2017) Tailoring the Energy Landscape in Quasi-2D Halide Perovskites Enables Efficient Green-Light Emission. Nano Letters. Available: http://dx.doi.org/10.1021/acs.nanolett.7b00976.en
dc.identifier.issn1530-6984-
dc.identifier.issn1530-6992-
dc.identifier.issn1530-6984en
dc.identifier.issn1530-6992en
dc.identifier.doi10.1021/acs.nanolett.7b00976-
dc.identifier.urihttp://hdl.handle.net/10754/623655-
dc.description.abstractOrgano-metal halide perovskites are a promising platform for optoelectronic applications in view of their excellent charge-transport and bandgap tunability. However, their low photoluminescence quantum efficiencies, especially in low-excitation regimes, limit their efficiency for light emission. Consequently, perovskite light-emitting devices are operated under high injection, a regime under which the materials have so far been unstable. Here we show that, by concentrating photoexcited states into a small subpopulation of radiative domains, one can achieve a high quantum yield, even at low excitation intensities. We tailor the composition of quasi-2D perovskites to direct the energy transfer into the lowest-bandgap minority phase and to do so faster than it is lost to nonradiative centers. The new material exhibits 60% photoluminescence quantum yield at excitation intensities as low as 1.8 mW/cm2, yielding a ratio of quantum yield to excitation intensity of 0.3 cm2/mW; this represents a decrease of 2 orders of magnitude in the excitation power required to reach high efficiency compared with the best prior reports. Using this strategy, we report light-emitting diodes with external quantum efficiencies of 7.4% and a high luminescence of 8400 cd/m2.en
dc.description.sponsorshipThis publication is based in part on work supported by award no. KUS-11-009-21, made by King Abdullah University of Science and Technology (KAUST), by the Ontario Research Fund Research Excellence Program and by the Natural Sciences and Engineering Research Council (NSERC) of Canada. L.N.Q. and D.H.K. acknowledge the financial support by National Research Foundation of Korea Grant funded by the Korean Government (2014R1A2A1A09005656 and 2015M1A2A2058365). F.P.G.d.A. acknowledges financial support from the Connaught fund.en
dc.language.isoenen
dc.publisherAmerican Chemical Society (ACS)en
dc.relation.urlhttp://pubs.acs.org/doi/full/10.1021/acs.nanolett.7b00976en
dc.rightsThis document is the Accepted Manuscript version of a Published Work that appeared in final form in Nano Letters, copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see http://pubs.acs.org/doi/full/10.1021/acs.nanolett.7b00976.en
dc.subjectEnergy transferen
dc.subjectMonte Carloen
dc.subjectLight-emitting Diodesen
dc.subjectPerovskitesen
dc.subjectPhotoluminescence Quantum Yielden
dc.subjectQuasi-2d Perovskitesen
dc.titleTailoring the Energy Landscape in Quasi-2D Halide Perovskites Enables Efficient Green-Light Emissionen
dc.typeArticleen
dc.contributor.departmentMaterials Science and Engineering Programen
dc.identifier.journalNano Lettersen
dc.eprint.versionPost-printen
dc.contributor.institutionDepartment of Chemistry and Nano Science, Ewha Woman's University , 52 Ewhayeodae-gil, Seodaemun-gu, Seoul 03760, Korea.en
dc.contributor.institutionDepartment of Materials Science and Engineering, University of Toronto , 184 College Street, Toronto, Ontario M5S 3E4, Canada.en
dc.contributor.institutionDepartment of Electrical and Computer Engineering, University of Toronto , 10 King's College Road, Toronto, Ontario M5S 3G4, Canada.en
dc.contributor.affiliationKing Abdullah University of Science and Technology (KAUST)en
kaust.authorPan, Junen
kaust.authorBakr, Osman M.en
kaust.grant.numberKUS-11-009-21en
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