Continuously tunable emission in inverted Type-I CdS/CdSe core/crown semiconductor nanoplatelets

The synthesis and unique tunable optical properties of core/crown nanoplatelets having an inverted Type-I heterostructure are presented. Here, colloidal 2D CdS/CdSe heteronanoplatelets are grown with thickness of four monolayers using seed-mediated method. In this work, it is shown that the emission...

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Main Authors: Delikanli, Savas, Guzelturk, Burak, Hernandez-Martinez, Pedro Ludwig, Erdem, Talha, Kelestemur, Yusuf, Olutas, Murat, Akgul, Mehmet Zafer, Demir, Hilmi Volkan
Other Authors: School of Electrical and Electronic Engineering
Format: Article
Language:English
Published: 2015
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Online Access:https://hdl.handle.net/10356/105231
http://hdl.handle.net/10220/25966
http://dx.doi.org/10.1002/adfm.201500403
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Institution: Nanyang Technological University
Language: English
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spelling sg-ntu-dr.10356-1052312019-12-06T21:47:45Z Continuously tunable emission in inverted Type-I CdS/CdSe core/crown semiconductor nanoplatelets Delikanli, Savas Guzelturk, Burak Hernandez-Martinez, Pedro Ludwig Erdem, Talha Kelestemur, Yusuf Olutas, Murat Akgul, Mehmet Zafer Demir, Hilmi Volkan School of Electrical and Electronic Engineering School of Physical and Mathematical Sciences DRNTU::Engineering::Materials::Functional materials The synthesis and unique tunable optical properties of core/crown nanoplatelets having an inverted Type-I heterostructure are presented. Here, colloidal 2D CdS/CdSe heteronanoplatelets are grown with thickness of four monolayers using seed-mediated method. In this work, it is shown that the emission peak of the resulting CdS/CdSe heteronanoplatelets can be continuously spectrally tuned between the peak emission wavelengths of the core only CdS nanoplatelets (421 nm) and CdSe nanoplatelets (515 nm) having the same vertical thickness. In these inverted Type-I nanoplatelets, the unique continuous tunable emission is enabled by adjusting the lateral width of the CdSe crown, having a narrower bandgap, around the core CdS nanoplatelet, having a wider bandgap, as a result of the controlled lateral quantum confinement in the crown region additional to the pure vertical confinement. As a proof-of-concept demonstration, a white light generation is shown by using color conversion with these CdS/CdSe heteronanoplatelets having finely tuned thin crowns, resulting in a color rendering index of 80. The robust control of the electronic structure in such inverted Type-I heteronanoplatelets achieved by tailoring the lateral extent of the crown coating around the core template presents a new enabling pathway for bandgap engineering in solution-processed quantum wells. 2015-06-18T05:19:26Z 2019-12-06T21:47:45Z 2015-06-18T05:19:26Z 2019-12-06T21:47:45Z 2015 2015 Journal Article Delikanli, S., Guzelturk, B., Hernández-Martínez, P. L., Erdem, T., Kelestemur, Y., Olutas, M., et al. (2015). Continuously Tunable Emission in Inverted Type-I CdS/CdSe Core/Crown Semiconductor Nanoplatelets. Advanced Functional Materials, 25(27), 4282-4289. 1616-301X https://hdl.handle.net/10356/105231 http://hdl.handle.net/10220/25966 http://dx.doi.org/10.1002/adfm.201500403 en Advanced Functional Materials © 2015 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
institution Nanyang Technological University
building NTU Library
country Singapore
collection DR-NTU
language English
topic DRNTU::Engineering::Materials::Functional materials
spellingShingle DRNTU::Engineering::Materials::Functional materials
Delikanli, Savas
Guzelturk, Burak
Hernandez-Martinez, Pedro Ludwig
Erdem, Talha
Kelestemur, Yusuf
Olutas, Murat
Akgul, Mehmet Zafer
Demir, Hilmi Volkan
Continuously tunable emission in inverted Type-I CdS/CdSe core/crown semiconductor nanoplatelets
description The synthesis and unique tunable optical properties of core/crown nanoplatelets having an inverted Type-I heterostructure are presented. Here, colloidal 2D CdS/CdSe heteronanoplatelets are grown with thickness of four monolayers using seed-mediated method. In this work, it is shown that the emission peak of the resulting CdS/CdSe heteronanoplatelets can be continuously spectrally tuned between the peak emission wavelengths of the core only CdS nanoplatelets (421 nm) and CdSe nanoplatelets (515 nm) having the same vertical thickness. In these inverted Type-I nanoplatelets, the unique continuous tunable emission is enabled by adjusting the lateral width of the CdSe crown, having a narrower bandgap, around the core CdS nanoplatelet, having a wider bandgap, as a result of the controlled lateral quantum confinement in the crown region additional to the pure vertical confinement. As a proof-of-concept demonstration, a white light generation is shown by using color conversion with these CdS/CdSe heteronanoplatelets having finely tuned thin crowns, resulting in a color rendering index of 80. The robust control of the electronic structure in such inverted Type-I heteronanoplatelets achieved by tailoring the lateral extent of the crown coating around the core template presents a new enabling pathway for bandgap engineering in solution-processed quantum wells.
author2 School of Electrical and Electronic Engineering
author_facet School of Electrical and Electronic Engineering
Delikanli, Savas
Guzelturk, Burak
Hernandez-Martinez, Pedro Ludwig
Erdem, Talha
Kelestemur, Yusuf
Olutas, Murat
Akgul, Mehmet Zafer
Demir, Hilmi Volkan
format Article
author Delikanli, Savas
Guzelturk, Burak
Hernandez-Martinez, Pedro Ludwig
Erdem, Talha
Kelestemur, Yusuf
Olutas, Murat
Akgul, Mehmet Zafer
Demir, Hilmi Volkan
author_sort Delikanli, Savas
title Continuously tunable emission in inverted Type-I CdS/CdSe core/crown semiconductor nanoplatelets
title_short Continuously tunable emission in inverted Type-I CdS/CdSe core/crown semiconductor nanoplatelets
title_full Continuously tunable emission in inverted Type-I CdS/CdSe core/crown semiconductor nanoplatelets
title_fullStr Continuously tunable emission in inverted Type-I CdS/CdSe core/crown semiconductor nanoplatelets
title_full_unstemmed Continuously tunable emission in inverted Type-I CdS/CdSe core/crown semiconductor nanoplatelets
title_sort continuously tunable emission in inverted type-i cds/cdse core/crown semiconductor nanoplatelets
publishDate 2015
url https://hdl.handle.net/10356/105231
http://hdl.handle.net/10220/25966
http://dx.doi.org/10.1002/adfm.201500403
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