Properties of ternary quantum dots

Structural and Optical Characterisation of Size-Selected Glutathione-Capped Colloidal Cu–In–S Quantum Dots

“…Within the recent decade, the development of the methods of colloidal synthesis led to a family of ternary I-III-VI 2 semiconductor quantum dots (QDs) fabricated as a promising alternative to wellstudied binary II-VI and IV-VI QDs [1][2][3][4][5][6][7][8]. The new materials appeared interesting and important not C i t a t i o n: Azhniuk Y.M., Havryliuk Ye.O., Lopushanska B.V., Lopushansky V.V., Gomonnai A.V., Zahn D.R.T.…”

“…only in view of their "green" synthesis (without toxic cadmium-and lead-containing reagents), but also due to intense broadband luminescence in the visible spectral range and prospective applications in lightemitting diodes, photovoltaic solar cells, temperature sensors, biomedicine, and photocatalysis [1][2][3][4][5][6][7][8]. The QD family includes not only stoichiometric I-III-VI 2 (first of all, CuInS 2 and AgInS 2 ) semiconductors, but also group I element-deficient I-III-VI QDs which are known to exhibit even more intense photoluminescence (PL) with quantum yield reaching as high as 65-70 %, especially upon coating the QDs with a ZnS shell [9][10][11].…”

“…Colloidal I-III-VI QDs can be synthesized in organic media or aqueous media [7]. The first approach generally involves the pyrolysis of precursors in the presence of hydrophobic solvents and capping agents/ligands at elevated temperatures in an inert atmosphere.…”

“…It can be performed using the well-elaborated hot-injection [12], heating-up (noninjection) [13], thermal decomposition of a singlesource precursor [14], tuning the relative reactivity of cationic precursors [15], or solvothermal [16,17] techniques and leads to the formation of hydrophobic I-III-VI QDs. In order to obtain water-soluble QDs, important for applications in life sciences, the ligand exchange is performed [7]. A water-based approach is the direct synthesis from aqueous solutions by the arrested precipitation with mercaptoacetic (thioglycolic) acid [10,18], mercaptopropionic acid [19], glutathione [11,20], etc.…”

Optical Features of the Silica Sol–Gel Derived Glasses Doped with Copper Selenide Nanoparticles

“…Novadays, advanced nanochemical synthetic methods allow to fabricate much more wide circle of binary, ternary and more complicated semiconductor nanoparticles and clusters, e.g. [4][5][6][7]. The nanoparticles in various media may be fabricated: colloids, crystals, ordered mesophases, amorphous materials like glasses, etc, and their properties depend strongly not on size and intrinsic particle features, but also on the environmental factors due to possible interactions between nanoparticles and surrounding medium.…”