A method for manufacturing a light-emitting device a first solution including a first solvent, quantum dots, a ligand, and a first inorganic precursor, the quantum dots each including a core and a first shell performing first heating of raising to a first temperature or higher, the first temperature being a higher temperature of a melting point of the ligand and a boiling point of the first solvent, and performing second heating of raising to a second temperature, the second temperature being higher than the first temperature and being a temperature at which the first inorganic precursor epitaxially grows and a second shell coating the first shell is formed to form a plurality of first quantum dots, and wherein a plurality of second quantum dots each including, in a core, the same material as a material of the second shells are also formed.

A quantum dot composition includes a scatterer containing an inorganic material, a quantum dot containing a core and a shell surrounding the core, a ligand binding to the quantum dot, a polymer resin in which the quantum dot and the scatterer are dispersed, and a dispersant containing at least one of an acidic substituent or a basic substituent. At least one of the polymer resin or the dispersant includes a same material as the shell and the ligand binds to the polymer resin or dispersant that includes the same material as a shell.

Disclosed are inorganic nanoparticle quantum dots that effectively kill Gram-positive and Gram-negative bacteria resistant to antibiotics and the treatment of infectious bacterial diseases using the same, and more particularly inorganic nanoparticle quantum dots introduced with a hydrophilic ligand having activity of killing multidrug-resistant bacteria (MDR) and the use thereof. The quantum dots are capable of effectively killing bacteria when used at a low concentration by optimizing the core bandgap thereof and also do not exhibit cytotoxicity, and are thus useful as an agent for preventing or treating infectious diseases caused by multidrug-resistant bacteria.

An electroluminescent device comprising a first electrode and a second electrode facing each other, an emission layer disposed between the first electrode and the second electrode and including at least two light emitting particles, a hole transport layer disposed between the first electrode and the emission layer, and an electron transport layer disposed between the emission layer and the second electrode, wherein the electron transport layer comprises an inorganic layer disposed on the emission layer, the inorganic layer comprising a plurality of inorganic nanoparticles; and an organic layer directly disposed on at least a portion of the inorganic layer on a side opposite the emission layer, wherein a work function of the organic layer is greater than a work function of the inorganic layer.

A display device includes a display module having a folding area and a non-folding area adjacent to the folding area. A glass substrate is disposed on the display module and comprises a first layer and a second layer disposed on the first layer. The second layer has a compressive strength that is higher than a compressive strength of the first layer. The first layer and the second layer of the glass substrate each include a folding portion overlapping the folding area and having a first thickness and a non-folding portion overlapping the non-folding area and having a second thickness greater than the first thickness. The second layer of the non-folding portion has a thickness that is greater than a thickness of the second layer of the folding portion.

In order to realize a light-emitting element having high luminous efficiency in a light-emitting device with quantum dots, the light-emitting element including a hole transport layer and a light-emitting layer including a quantum dot luminescent body, the hole transport layer and the light-emitting layer being layered on each other is provided. The hole transport layer includes a compound of one or more of Cu.sup.+, Ag.sup.+, and Au.sup.+, and one or more of I.sup.−, SCN.sup.−, SeCN.sup.−, and CN.sup.−.

A preparation method of a light-emitting device includes forming a composite transition layer between a cathode and a quantum dot light-emitting layer and forming an anode on a surface of the quantum dot light-emitting layer away from the cathode. The composite transition layer includes a first transition layer, a second transition layer, and a third transition layer. The first transition layer is arranged on one side close to the cathode and includes a metal halide. The second transition layer is arranged on a surface of the first transition layer away from the cathode and includes a hydrogen halide. The third transition layer is arranged on a surface of the second transition layer away from the first transition layer and includes an ester compound.

The disclosure relates to a quantum dot light-emitting diode and a fabricating method thereof. The quantum dot light-emitting diode includes a quantum dot layer and an electron transport layer formed on the quantum dot layer. A surface of a side of the quantum dot layer close to the electron transport layer bonds to an ester substance.

A light-emitting diode and a preparation method of the light-emitting diode are provided in the present application. The light-emitting diode includes an anode and a cathode which are arranged opposite to each other, a luminescent layer arranged between the anode and the cathode, an electron transport layer arranged between the cathode and the luminescent layer, and a composite film arranged between the cathode and the electron transport layer. Where the composite film includes an aluminum oxide film arranged adjacent to the electron transport layer, and a nano metal oxide film or a silicon nitride film arranged away from the electron transport layer. The light-emitting diode according to the present application may block water and oxygen from infiltrating into it effectively, so that a poor stability of the light-emitting diode device in a water-oxygen environment is improved.

A quantum dot, and an ink composition, a light-emitting device, an optical member, and an apparatus, each including the quantum dot. The quantum dot includes: a nanoparticle; and at least one ligand on a surface of the nanoparticle, wherein the nanoparticle does not include mercury and cadmium, and the at least one ligand includes at least two thiol groups and at least one hydrophilic group.