Abstract: Embodiments of the present invention relate to a semiconductor-nanoparticle-ligand complex, a preparation method therefor, a photosensitive resin composition, an optical film, an electroluminescent diode and an electronic device, and, more specifically, can provide: a semiconductor-nanoparticle-ligand complex comprising a ligand represented by chemical formula 1, and thus has excellent compatibility; an optical film with excellent efficiency; an electroluminescent diode; and an electronic device.

Abstract: Provided are a quantum dot, a method of manufacturing the quantum dot, and an electronic device including the quantum dot. The quantum dot includes a core including a first semiconductor nanocrystal and a doping metal. The first semiconductor nanocrystal includes a group II element, a group III element, and a group V element. The quantum dot has a narrower full width at half maximum (FWHM) and superior quantum efficiency, and manufactured in a simple manner.

Abstract: A technology disclosed in the present disclosure provides a Group III-V-based quantum dot including a seed which includes a Group III element, a Group V element, and an active metal having various oxidation numbers and in which a molar ratio of the Group III element and the active metal is 1:3 to 1:30, and a method of manufacturing the same.

Abstract: A piston assembly includes a steel piston body configured by joining an upper block and a lower block with each other, a plurality of ring grooves formed around an outer side surface of the steel piston body, a cooling gallery that is formed to be sealed by joining the upper block and the lower block with each other and that includes an inlet port and an outlet port so that oil flows into or out of the cooling gallery, and an oil hole formed to fluidically communicate the cooling gallery with a first oil groove disposed in the outer side surface of the steel piston body. When the steel piston body moves upwards, oil drawn into the cooling gallery is drawn into the first oil groove and thus is supplied to a skirt of the piston body.