Highly stable, near-unity efficiency atomically flat semiconductor nanocrystals of CdSe/ZnS hetero-nanoplatelets enabled by ZnS-Shell hot-injection growth
buir.contributor.author | Yemliha, Yemliha | |
buir.contributor.author | Quliyeva, Ulviyya | |
buir.contributor.author | Güngör, Kıvanç | |
buir.contributor.author | Erdem, Onur | |
buir.contributor.author | Kelestemur, Yusuf | |
buir.contributor.author | Mutlugün, Evren | |
buir.contributor.author | Demir, Hilmi Volkan | |
buir.contributor.orcid | Demir, Hilmi Volkan|0000-0003-1793-112X | |
dc.citation.epage | 1804854-11 | en_US |
dc.citation.issueNumber | 8 | en_US |
dc.citation.spage | 1804854-1 | en_US |
dc.citation.volumeNumber | 15 | en_US |
dc.contributor.author | Yemliha, Yemliha | en_US |
dc.contributor.author | Quliyeva, Ulviyya | en_US |
dc.contributor.author | Güngör, Kıvanç | en_US |
dc.contributor.author | Erdem, Onur | en_US |
dc.contributor.author | Kelestemur, Yusuf | en_US |
dc.contributor.author | Mutlugün, Evren | en_US |
dc.contributor.author | Kovalenko, M. | en_US |
dc.contributor.author | Demir, Hilmi Volkan | en_US |
dc.date.accessioned | 2020-02-11T06:19:16Z | |
dc.date.available | 2020-02-11T06:19:16Z | |
dc.date.issued | 2019 | |
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 | Colloidal semiconductor nanoplatelets (NPLs) offer important benefits in nanocrystal optoelectronics with their unique excitonic properties. For NPLs, colloidal atomic layer deposition (c‐ALD) provides the ability to produce their core/shell heterostructures. However, as c‐ALD takes place at room temperature, this technique allows for only limited stability and low quantum yield. Here, highly stable, near‐unity efficiency CdSe/ZnS NPLs are shown using hot‐injection (HI) shell growth performed at 573 K, enabling routinely reproducible quantum yields up to 98%. These CdSe/ZnS HI‐shell hetero‐NPLs fully recover their initial photoluminescence (PL) intensity in solution after a heating cycle from 300 to 525 K under inert gas atmosphere, and their solid films exhibit 100% recovery of their initial PL intensity after a heating cycle up to 400 K under ambient atmosphere, by far outperforming the control group of c‐ALD shell‐coated CdSe/ZnS NPLs, which can sustain only 20% of their PL. In optical gain measurements, these core/HI‐shell NPLs exhibit ultralow gain thresholds reaching ≈7 µJ cm−2. Despite being annealed at 500 K, these ZnS‐HI‐shell NPLs possess low gain thresholds as small as 25 µJ cm−2. These findings indicate that the proposed 573 K HI‐shell‐grown CdSe/ZnS NPLs hold great promise for extraordinarily high performance in nanocrystal optoelectronics. | en_US |
dc.description.provenance | Submitted by Onur Emek (onur.emek@bilkent.edu.tr) on 2020-02-11T06:19:16Z No. of bitstreams: 1 Bilkent-research-paper.pdf: 268963 bytes, checksum: ad2e3a30c8172b573b9662390ed2d3cf (MD5) | en |
dc.description.provenance | Made available in DSpace on 2020-02-11T06:19:16Z (GMT). No. of bitstreams: 1 Bilkent-research-paper.pdf: 268963 bytes, checksum: ad2e3a30c8172b573b9662390ed2d3cf (MD5) Previous issue date: 2019 | en |
dc.description.sponsorship | Singapore National Research Foundation. Grant Numbers: NRF‐NRFI2016‐08, NRF‐CRP‐6‐2010‐02 | en_US |
dc.description.sponsorship | Agency for Science, Technology and Research. Grant Numbers: 114F326, 115E679 | en_US |
dc.description.sponsorship | Abdullah Gul University Scientific Research. Grant Number: FDK‐2017‐96 | en_US |
dc.description.sponsorship | Marie Skłodowska‐Curie. Grant Number: 798697 | en_US |
dc.embargo.release | 2020-02-22 | |
dc.identifier.doi | 10.1002/smll.201804854 | en_US |
dc.identifier.issn | 1613-6810 | |
dc.identifier.uri | http://hdl.handle.net/11693/53242 | |
dc.language.iso | English | en_US |
dc.publisher | WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim | en_US |
dc.relation.isversionof | https://doi.org/10.1002/smll.201804854 | en_US |
dc.source.title | Small | en_US |
dc.subject | Core/shell nanocrystals | en_US |
dc.subject | Hot‐injection growth | en_US |
dc.subject | Nanoplatelets | en_US |
dc.subject | Optical gain | en_US |
dc.subject | Semiconductor nanocrystals | en_US |
dc.subject | Stability | en_US |
dc.title | Highly stable, near-unity efficiency atomically flat semiconductor nanocrystals of CdSe/ZnS hetero-nanoplatelets enabled by ZnS-Shell hot-injection growth | en_US |
dc.type | Article | en_US |
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