Record high external quantum efficiency of 19.2% achieved in light-emitting diodes of colloidal quantum wells enabled by hot-Injection shell growth

Simple item page
buir.contributor.authorAltıntaş, Yemliha
buir.contributor.authorSharma, Manoj
buir.contributor.authorMutlugün, Evren
buir.contributor.authorDemir, Hilmi Volkan
buir.contributor.orcidDemir, Hilmi Volkan|0000-0003-1793-112X
dc.citation.epage1905824-10en_US
dc.citation.issueNumber8en_US
dc.citation.spage1905824-1en_US
dc.citation.volumeNumber32en_US
dc.contributor.authorLiu, B.en_US
dc.contributor.authorAltıntaş, Yemlihaen_US
dc.contributor.authorWang, L.en_US
dc.contributor.authorShendre, S.en_US
dc.contributor.authorSharma, Manojen_US
dc.contributor.authorSun, H.en_US
dc.contributor.authorMutlugün, Evrenen_US
dc.contributor.authorDemir, Hilmi Volkanen_US
dc.date.accessioned2020-02-10T06:12:26Z
dc.date.available2020-02-10T06:12:26Z
dc.date.issued2020
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.abstractColloidal quantum wells (CQWs) are regarded as a highly promising class of optoelectronic materials, thanks to their unique excitonic characteristics of high extinction coefficients and ultranarrow emission bandwidths. Although the exploration of CQWs in light‐emitting diodes (LEDs) is impressive, the performance of CQW‐LEDs lags far behind other types of soft‐material LEDs (e.g., organic LEDs, colloidal‐quantum‐dot LEDs, and perovskite LEDs). Herein, high‐efficiency CQW‐LEDs reaching close to the theoretical limit are reported. A key factor for this high performance is the exploitation of hot‐injection shell (HIS) growth of CQWs, which enables a near‐unity photoluminescence quantum yield (PLQY), reduces nonradiative channels, ensures smooth films, and enhances the stability. Remarkably, the PLQY remains 95% in solution and 87% in film despite rigorous cleaning. Through systematically understanding their shape‐, composition‐, and device‐engineering, the CQW‐LEDs using CdSe/Cd0.25Zn0.75S core/HIS CQWs exhibit a maximum external quantum efficiency of 19.2%. Additionally, a high luminance of 23 490 cd m−2, extremely saturated red color with the Commission Internationale de L'Eclairage (CIE) coordinates of (0.715, 0.283), and stable emission are obtained. The findings indicate that HIS‐grown CQWs enable high‐performance solution‐processed LEDs, which may pave the path for future CQW‐based display and lighting technologies.en_US
dc.description.provenanceSubmitted by Onur Emek (onur.emek@bilkent.edu.tr) on 2020-02-10T06:12:26Z No. of bitstreams: 1 Bilkent-research-paper.pdf: 268963 bytes, checksum: ad2e3a30c8172b573b9662390ed2d3cf (MD5)en
dc.description.provenanceMade available in DSpace on 2020-02-10T06:12:26Z (GMT). No. of bitstreams: 1 Bilkent-research-paper.pdf: 268963 bytes, checksum: ad2e3a30c8172b573b9662390ed2d3cf (MD5) Previous issue date: 2019en
dc.description.sponsorshipNational Research Foundation-Prime Minister's office, Republic of Singapore. Grant Number: NRF‐NRFI2016‐08en_US
dc.description.sponsorshipSingapore Agency for Science, Technology and Research (A*STAR) SERC Pharos. Grant Number: 152 73 00025en_US
dc.embargo.release2021-02-25
dc.identifier.doi10.1002/adma.201905824en_US
dc.identifier.issn0935-9648
dc.identifier.urihttp://hdl.handle.net/11693/53202
dc.language.isoEnglishen_US
dc.publisherWILEY-VCH Verlag GmbH & Co. KGaA, Weinheimen_US
dc.relation.isversionofhttps://doi.org/10.1002/adma.201905824en_US
dc.source.titleAdvanced Materialsen_US
dc.subjectColloidal quantum wellsen_US
dc.subjectCore/shell structuresen_US
dc.subjectHot injectionen_US
dc.subjectLight‐emitting diodesen_US
dc.subjectNanoplateletsen_US
dc.titleRecord high external quantum efficiency of 19.2% achieved in light-emitting diodes of colloidal quantum wells enabled by hot-Injection shell growthen_US
dc.typeArticleen_US

Files

Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
Record_High_External_Quantum_Efficiency_of_19.2%_Achieved_in_Light‐Emitting_Diodes_of_Colloidal_Quantum_Wells_Enabled_by_Hot‐Injection_Shell_Growth.pdf
Size:
1.64 MB
Format:
Adobe Portable Document Format
Description:
Download
License bundle
Now showing 1 - 1 of 1
No Thumbnail Available
Name:
license.txt
Size:
1.71 KB
Format:
Item-specific license agreed upon to submission
Description:
Download

Collections

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