Electroluminescent Cu‐doped CdS Quantum Dots

One-pot aqueous synthesis of composition-tunable near-infrared emitting Cu-doped CdS quantum dots as fluorescence imaging probes in living cells

“…Cu(II) may be reduced to Cu(I) by the sulfide ions during the diffusion of Cu into the host. 22,24,[34][35][36][37] Fig . 1c gives the mechanism of the emission broadening of the Cu:CdS d-dots, which has also been discussed in some literature for organic synthesis of the copper-doped d-dots.…”

“…4b) when the reaction temperature is tuned from 25 C to 100 C, and the corresponding absorption wavelength can also be enhanced at a higher reflux temperature, which connoted that the particle size of the d-dots has been significantly increased when the reaction temperature increased. 22 Generally speaking, it is the major reason of the particle size increasing that the higher temperature can accelerate the reaction rate of the synthesis system. Simultaneously, the higher temperature can provide sufficient energy for the Cu-doping process.…”

“…have been reported, but none of them has been used as living cellular imaging agents so far. 20,[22][23][24][25] They were mostly synthesized in organic solvents such as octadecene (ODE) and trioctylphosphine (TOP), and were prepared via a strategy of growth-doping or surface-doping. The process of phase transfer and purification for further application in biological field could lead to quenching of the photoluminescence (PL) of the d-dots because the dopant center is located close to the surface of the particles.…”

A New Class of Nanostructured Inorganic–Organic Hybrid Semiconductors Based on II–VI Binary Compounds

“…Semiconductor QDs bridge the gap between molecules and bulk materials, but the boundaries among molecules, QDs and bulk regimes are not well defined and are material dependent. Over the past 20 years, tremendous research efforts have been made to develop II-VI quantum dots because of their great potential to revolutionize numerous traditional and emerging technologies [e.g., light emitting diodes (LEDs) (37)(38)(39)(40)(41)(42), solar cells (43)(44)(45)(46)(47)(48)(49)(50)(51), lasers (52)(53)(54)(55), nonlinear optical devices (56)(57)(58)(59)(60)(61)(62), and biological imaging (44,(63)(64)(65)(66)]. A major milestone in this research field is to quantify the size-dependent properties of II-VI quantum dots and to map the transition from molecular to macroscopic crystal properties.…”

Synthesis and characterization of Mn doped ZnCdS core shell nanostructures QDs using a chemical precipitation route

“…These properties arises due to quantum confinement effect and large surface to volume ratio. These properties varies along with their size and composition possess potential applications in light emitting diodes (LEDs) [1], displays [2],bioimaging [3], and solar cell [4]. Ternary semiconductor ZnCdS NCs have combined properties of ZnS and CdS i.e.…”