Charge Directed Assembly of Fluorescent Quantum Dots Inside Monocrystalline KH2PO4
Yuriy Khalavka a, Dmytro Vorontsov a, Svitlana Filonenko b, Olena Tynkevych a, Andrii Kanak a, Galyna Okrepka a
a Yuriy Fedkovych Chernivtsi National University, Ukraine, Kotsyubynsky street, Chernivtsi, Ukraine
b Max Planck Institute of Colloids and Interfaces - Potsdam, Research Campus Golm, D-14424 Potsdam, Germany
Proceedings of Internet Conference for Quantum Dots (iCQD)
Online, Spain, 2020 July 14th - 17th
Organizers: Quinten Akkerman, Raffaella Buonsanti, Zeger Hens and Maksym Kovalenko
Poster, Yuriy Khalavka, 101
Publication date: 3rd July 2020

The synthesis of aqueous CdTe/CdS quantum dots (QDs) embedded in potassium dihydrogen phosphate KH2PO4 (KDP) is demonstrated. CdTe/CdS QDs were synthesized in water solution, followed with incorporation into an inorganic salt by the method of slow evaporation of water under ambient conditions. The resulting KDP:CdTe/CdS composites are new types of solid-state conversion materials with emission colors covering green to red spectral regions. [1] In this talk, we report the optical and electrical properties of KDP: CdTe/CdS composites. The composites exhibit anisotropic photoluminescence properties, and due to the protection of the tight matrix, good thermal and chemical stability. We observed strong evidence of the electrostatic nature of the nanoparticle incorporation mechanism that opens new opportunities to tune the composition of such materials. The production of crystals with complex impurities opens new possibilities for studying the physical properties of crystals, their modification, and selective entry into certain growth sectors, which makes it possible to differentiate the properties of different sectors. These materials can be used in various optoelectronic applications.

This study was partially supported by MESU Grant "Search of the optimal conditions to produce new Generation of Light-Converting Quantum Dots Made of Non-toxic Earthabundant Elements" 0119U100728

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