Alloyed heterostructures of CdSexS1-x nanoplatelets with highly tunable optical gain performance
buir.contributor.author | Demir, Hilmi Volkan | |
buir.contributor.orcid | Demir, Hilmi Volkan|0000-0003-1793-112X | |
dc.citation.epage | 4865 | en_US |
dc.citation.issueNumber | 11 | en_US |
dc.citation.spage | 4857 | en_US |
dc.citation.volumeNumber | 29 | en_US |
dc.contributor.author | Kelestemur Y. | en_US |
dc.contributor.author | Dede, D. | en_US |
dc.contributor.author | Gungor K. | en_US |
dc.contributor.author | Usanmaz, C. F. | en_US |
dc.contributor.author | Erdem, O. | en_US |
dc.contributor.author | Demir, Hilmi Volkan | en_US |
dc.date.accessioned | 2018-04-12T11:09:27Z | |
dc.date.available | 2018-04-12T11:09:27Z | |
dc.date.issued | 2017 | en_US |
dc.department | Institute of Materials Science and Nanotechnology (UNAM) | en_US |
dc.department | Department of Electrical and Electronics Engineering | en_US |
dc.department | Department of Physics | en_US |
dc.description.abstract | Here, we designed and synthesized alloyed heterostructures of CdSexS1-x nanoplatelets (NPLs) using CdS coating in the lateral and vertical directions for the achievement of highly tunable optical gain performance. By using homogeneously alloyed CdSexS1-x core NPLs as a seed, we prepared CdSexS1-x/CdS core/crown NPLs, where CdS crown region is extended only in the lateral direction. With the sidewall passivation around inner CdSexS1-x cores, we achieved enhanced photoluminescence quantum yield (PL-QY) (reaching 60%), together with increased absorption cross-section and improved stability without changing the emission spectrum of CdSexS1-x alloyed core NPLs. In addition, we further extended the spectral tunability of these solution-processed NPLs with the synthesis of CdSexS1-x/CdS core/shell NPLs. Depending on the sulfur composition of the CdSexS1-x core and thickness of the CdS shell, CdSexS1-x/CdS core/shell NPLs possessed highly tunable emission characteristics within the spectral range of 560-650 nm. Finally, we studied the optical gain performances of different heterostructures of CdSexS1-x alloyed NPLs offering great advantages, including reduced reabsorption and spectrally tunable optical gain range. Despite their decreased PL-QY and reduced absorption cross-section upon increasing the sulfur composition, CdSexS1-x based NPLs exhibit highly tunable amplified spontaneous emission performance together with low gain thresholds down to ∼53 μJ/cm2. | en_US |
dc.description.provenance | Made available in DSpace on 2018-04-12T11:09:27Z (GMT). No. of bitstreams: 1 bilkent-research-paper.pdf: 179475 bytes, checksum: ea0bedeb05ac9ccfb983c327e155f0c2 (MD5) Previous issue date: 2017 | en |
dc.identifier.doi | 10.1021/acs.chemmater.7b00829 | en_US |
dc.identifier.issn | 0897-4756 | |
dc.identifier.uri | http://hdl.handle.net/11693/37305 | |
dc.language.iso | English | en_US |
dc.publisher | American Chemical Society | en_US |
dc.relation.isversionof | http://dx.doi.org/10.1021/acs.chemmater.7b00829 | en_US |
dc.source.title | Chemistry of Materials | en_US |
dc.subject | Absorption spectroscopy | en_US |
dc.subject | Cadmium sulfide | en_US |
dc.subject | Emission spectroscopy | en_US |
dc.subject | Sulfur | en_US |
dc.subject | Absorption cross sections | en_US |
dc.subject | Amplified spontaneous emissions | en_US |
dc.subject | Emission spectrums | en_US |
dc.subject | Photoluminescence quantum yields | en_US |
dc.subject | Sidewall passivation | en_US |
dc.subject | Spectral tunability | en_US |
dc.subject | Spectrally tunable | en_US |
dc.subject | Vertical direction | en_US |
dc.subject | Optical gain | en_US |
dc.title | Alloyed heterostructures of CdSexS1-x nanoplatelets with highly tunable optical gain performance | en_US |
dc.type | Article | en_US |
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