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Posted On: 08/02/2017 8:21:06 AM
Post# of 22467
Jason Hartlove from 2015
https://vimeo.com/129975498
....importance of blue down to 455nm
.....from QMC's latest patent
"By varying the concentration of carboxylic acid, zinc carboxylate and/or alkyl amine, the particle size of InP was tuned and the corresponding emission color could varied from blue to red. In a preferred embodiment the size of InP QDs is controlled by varying the zinc carboxylate concentration."
The obtained InP/ZnS QDs had very good stability against photo-bleaching over time and quantum yield of at least 40%. The full width half maximum (FWHM) is between 60 and 150 nm.
The color ranges from blue-green till red (500-610 nm).
http://patents.com/us-9577149.html
2017
Large-Scale Synthesis of Highly Luminescent InP@ZnS Quantum Dots Using Elemental Phosphorus Precursor
InP quantum dots (QDs) are nontoxic emitters, which are considered an alternative to CdSe-based QDs. However, the limited choice and high cost of P precursors have a negative impact on their practical applicability. In this work, we report the large-scale synthesis of highly luminescent InP@ZnS QDs from an elemental P precursor (P4), which was simply synthesized via the sublimation of red P powder. The size of the InP QDs was controlled by varying the reaction parameters such as the reaction time and temperature, and the type of In precursors. This way, the photoluminescence properties of the synthesized InP@ZnS QDs could be easily tuned across the entire visible range, while their quantum yield could be increased up to 60% via the optimization of reaction conditions. Furthermore, possible reaction pathways for the formation of InP QDs using the P4 precursor have been investigated with nuclear magnetic resonance spectroscopy and it was demonstrated that the direct reaction of P4 precursor with In precursor produces InP structures without the formation of intermediate species. The large-scale production of InP@ZnS QDs was demonstrated by yielding more than 6 g of QDs per one-batch reaction. We strongly believe that the newly developed approach bears the potential to be widely used for manufacturing inexpensive high-quality QD emitters.
http://pubs.acs.org/doi/abs/10.1021/acs.chemm...ode=cmatex
https://vimeo.com/129975498
....importance of blue down to 455nm
.....from QMC's latest patent
"By varying the concentration of carboxylic acid, zinc carboxylate and/or alkyl amine, the particle size of InP was tuned and the corresponding emission color could varied from blue to red. In a preferred embodiment the size of InP QDs is controlled by varying the zinc carboxylate concentration."
The obtained InP/ZnS QDs had very good stability against photo-bleaching over time and quantum yield of at least 40%. The full width half maximum (FWHM) is between 60 and 150 nm.
The color ranges from blue-green till red (500-610 nm).
http://patents.com/us-9577149.html
2017
Large-Scale Synthesis of Highly Luminescent InP@ZnS Quantum Dots Using Elemental Phosphorus Precursor
InP quantum dots (QDs) are nontoxic emitters, which are considered an alternative to CdSe-based QDs. However, the limited choice and high cost of P precursors have a negative impact on their practical applicability. In this work, we report the large-scale synthesis of highly luminescent InP@ZnS QDs from an elemental P precursor (P4), which was simply synthesized via the sublimation of red P powder. The size of the InP QDs was controlled by varying the reaction parameters such as the reaction time and temperature, and the type of In precursors. This way, the photoluminescence properties of the synthesized InP@ZnS QDs could be easily tuned across the entire visible range, while their quantum yield could be increased up to 60% via the optimization of reaction conditions. Furthermore, possible reaction pathways for the formation of InP QDs using the P4 precursor have been investigated with nuclear magnetic resonance spectroscopy and it was demonstrated that the direct reaction of P4 precursor with In precursor produces InP structures without the formation of intermediate species. The large-scale production of InP@ZnS QDs was demonstrated by yielding more than 6 g of QDs per one-batch reaction. We strongly believe that the newly developed approach bears the potential to be widely used for manufacturing inexpensive high-quality QD emitters.
http://pubs.acs.org/doi/abs/10.1021/acs.chemm...ode=cmatex
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