Silicon quantum dots: surface matter, what next?

Abstract

Silicon quantum dots (SiQDs) are of great interest due to their safety for bioorganisms, especially their low level of toxicity, giving them great potential to become optoelectronic, photonic, and photodynamic...

Streamlined synthesis of potential dual-emissive fluorescent silicon quantum dots (SiQDs) for cell imaging

“…22,52,54 The NIR emission was speculated to be caused by the SiQDs core doped with small amounts of other elements, such as oxygen (O), nitrogen (N), and carbon (C) to form to form Si–O and Si–C bonds, which is considered trapping emission. 55,56…”

The effect of particle size on the optical and electronic properties of hydrogenated silicon nanoparticles

“…From a practical perspective, SiNPs have been prepared both embedded in a matrix and as colloidal particles, and find use in a range of applications including light emitting diodes, lasers, solar-cells, data storage and bioimaging and sensing. [1][2][3] Because of the covalent character of the bonding in silicon, undercoordinated silicon atoms on the surface of the SiNPs need to be terminated by capping groups. These capping groups can, for example, be hydrogen atoms, hydroxyls or organic groups.…”

“…From a practical perspective, SiNPs have been prepared both embedded in a matrix and as colloidal particles, and find use in a range of applications including light emitting diodes, lasers, solar-cells, data storage and bioimaging and sensing. 1–3…”

Inkjet printing of heavy-metal-free quantum dots-based devices: a review

“…However, the intrinsic toxicity of HM QDs restricts their application and further commercialization despite their superior stability and optoelectrical properties [3]. Hence, researchers have turned their attention to developing HMF QDs, including II-VI QDs (ZnO, ZnS, ZnSe, and ZnTe) [4], III-V QDs (III = In, Ga, Al; V = N, P, Sb) [5], I-III-VI QDs (I = Cu, Ag; III = In, Al, Ga; VI = S, Te, Se) [6], lead-free perovskite QDs (LFP QDs) [7], carbon-based QDs (carbon QDs (CQDs) [8] and graphene QDs (GQDs) [9]), silicon QDs (Si QDs) [10]. The colloidal nature of QDs makes it possible to use the IJP technique to deposit QDs on substrates for assembling various devices such as QD-based light-emitting diodes (QLEDs) [11], humidity sensors [12], UV-shields [13], synaptic transistors [14], photodetectors (PDs) [15], anticounterfeit tags [16], color conversion layers [17], photovoltaic cells (PVCs) [18] (see figure 1), some of which will be introduced in section 5.…”