A general strategy for CuInS2 based quantum dots with adjustable surface chemistry

Effects of Repetitive Pressure on the Photoluminescence of Bare and ZnS-Capped CuInS2 Quantum Dots: Implications for Nanoscale Stress Sensors

“…The lattice constants for CuInS 2 are a = b = 5.517 Å and c = 11.06 Å, while they are a = b = c = 5.345 Å for ZnS with a zinc blende phase. The intrinsic lattice mismatch between them is about 3% that is low enough to allow for epitaxial shell growth. , To further investigate the shell coating effects on the PL properties under pressure loading, bare CuInS 2 and core–shell CuInS 2 /ZnS QDs were separately put into the gasket cavity together with a ruby particle (for pressure calibration), as illustrated in Figure d. Pressure is then applied when bringing the anvils together by controlling the spring gasket.…”

Ternary Chalcogenide-Based Quantum Dots and Carbon Nanotubes: Establishing a Toolbox for Controlled Formation of Nanocomposites

“…Engineering of CIS-, CGS-, and CISe-Based QDs. To obtain charged nanocrystals based on CuInS 2 , CuGaS 2 , and CuInSe 2 , our previously published work for the versatile surface engineering of QDs 34 was used as a fundament and further developed. As shown in Figure S5a, the XRD diffraction peaks reveal that the synthesis protocol can be easily modified to synthesize different chalcopyrite nanometer-sized materials.…”

“…The aim of this work is, therefore, to investigate how, generally, QDs can chemically be attached to CNTs, what influence this has on the optoelectronic properties, and how they can be tuned through surface engineering. Based on our previous work that allows for versatile surface engineering of ternary chalcogenide-based nanocrystals 34 and well-established methods to functionalize the sidewalls of MWCNTs, we synthesized QD-CNT nanocomposites by simple electrostatic interaction for the present report. By modifying the surface with ligands of different alkyl chain lengths, the separation distance between QDs and CNT was varied and crucial properties such as the band gap and the electron transfer between the nanomaterials were studied intensively by experimental and theoretical ab initio methods.…”

“…Synthesis of CuInS 2 , CuGaS 2 , and CuInSe 2 Core Quantum Dots. The synthetic approach was adopted from our previously published paper 34 and transferred from CuInS 2 (CIS) to synthesize CuGaS 2 (CGS) and CuInSe 2 (CISe). In a typical procedure, 73.5 mg (0.6 mmol) of Cu(OAc), 175.2 mg (0.6 mmol) of In(OAc) 3 (or 220.2 mg (0.6 mmol) Ga(acac) 3 ), 1023.9 mg (3.6 mmol) of SA, 15.0 mL of ODE, and 15.0 mL of DDT were loaded in a 50 mL three-neck flask and vacuumed for 30 min at 120 °C to remove any water or oxygen that was left in the reaction mixture.…”

Synergistic tailoring of band structure and charge carrier extraction in “green” core/shell quantum dots for highly efficient solar energy conversion

“…are regarded as favorable substitutes of Pb and Cd-based QDs due to their environmental friendliness and excellent optical properties including wide photoluminescence tunability, broadband light absorption, large Stokes shift, and high luminescence efficiency, which have been widely applied in various optoelectronic devices including light-emitting diodes (LEDs), solar cells, luminescent solar concentrators (LSCs) and PEC cells. [24][25][26][27][28][29][30][31][32][33][34][35][36][37].…”