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231225s2017 xx |||||o 00| ||eng c |
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|a 10.1021/acs.chemmater.7b00848
|2 doi
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|a pubmed24n0912.xml
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|a DE-627
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|e rakwb
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|a eng
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| 100 |
1 |
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|a Pietra, Francesca
|e verfasserin
|4 aut
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|a Ga for Zn Cation Exchange Allows for Highly Luminescent and Photostable InZnP-Based Quantum Dots
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|c 2017
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|a Text
|b txt
|2 rdacontent
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|a ƒaComputermedien
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|2 rdamedia
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|a ƒa Online-Ressource
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|a Date Revised 20.11.2019
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|a published: Print-Electronic
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|a Citation Status PubMed-not-MEDLINE
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|a In this work, we demonstrate that a preferential Ga-for-Zn cation exchange is responsible for the increase in photoluminescence that is observed when gallium oleate is added to InZnP alloy QDs. By exposing InZnP QDs with varying Zn/In ratios to gallium oleate and monitoring their optical properties, composition, and size, we conclude that Ga3+ preferentially replaces Zn2+, leading to the formation of InZnP/InGaP core/graded-shell QDs. This cation exchange reaction results in a large increase of the QD photoluminescence, but only for InZnP QDs with Zn/In ≥ 0.5. For InP QDs that do not contain zinc, Ga is most likely incorporated only on the quantum dot surface, and a PL enhancement is not observed. After further growth of a GaP shell and a lattice-matched ZnSeS outer shell, the cation-exchanged InZnP/InGaP QDs continue to exhibit superior PL QY (over 70%) and stability under long-term illumination (840 h, 5 weeks) compared to InZnP cores with the same shells. These results provide important mechanistic insights into recent improvements in InP-based QDs for luminescent applications
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|a Journal Article
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|a Kirkwood, Nicholas
|e verfasserin
|4 aut
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|a De Trizio, Luca
|e verfasserin
|4 aut
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|a Hoekstra, Anne W
|e verfasserin
|4 aut
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|a Kleibergen, Lennart
|e verfasserin
|4 aut
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|a Renaud, Nicolas
|e verfasserin
|4 aut
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|a Koole, Rolf
|e verfasserin
|4 aut
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|a Baesjou, Patrick
|e verfasserin
|4 aut
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|a Manna, Liberato
|e verfasserin
|4 aut
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|a Houtepen, Arjan J
|e verfasserin
|4 aut
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| 773 |
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|i Enthalten in
|t Chemistry of materials : a publication of the American Chemical Society
|d 1998
|g 29(2017), 12 vom: 27. Juni, Seite 5192-5199
|w (DE-627)NLM098194763
|x 0897-4756
|7 nnns
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| 773 |
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|g volume:29
|g year:2017
|g number:12
|g day:27
|g month:06
|g pages:5192-5199
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|u http://dx.doi.org/10.1021/acs.chemmater.7b00848
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