The disclosure provides a core-shell quantum dots preparing method, core-shell quantum dots and a quantum dot electroluminescent device including the core-shell quantum dots. The method includes preparing a solution containing alloy quantum dot cores, purifying the alloy quantum dot cores; heating a mixture of a cation precursor of the shell, a carboxylic acid, the alloy quantum dot cores and a solvent for a certain period of time, after it, the carboxylic acid presents in the mixture being free carboxylic acid; adding an fatty amine and an anion precursor of the shell into the mixture to coat the alloy quantum dot cores to obtain the core-shell quantum dot. The surface of the core-shell quantum dots includes a fatty amine ligand, which amounts for at least 80% of all the ligands on the surface of the core-shell quantum dots, and the core-shell quantum dots are high in luminescence efficiency and stability.

A nanomaterial includes a ZnO nanocrystal and a surface ligand bonded to the ZnO nanocrystal. The surface ligand has a structure of

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R.sup.1, R.sup.2, and R.sup.3 are independently selected from at least one of an alkyl group, an alkoxy group, a hydroxyalkoxy group, a hydroxyl group, or a hydrogen atom. R.sup.4 is selected from a hydrocarbon group having a carbon number of 5 to 60. A carbon number of the alkyl group ranges from 1 to 5. A carbon number of the alkoxy group ranges from 1 to 5. A carbon number of the hydroxyalkoxy group ranges from 1 to 5.

Disclosed is a zinc oxide-based quantum dot aggregate capable of emitting white light is a mixture of a zinc oxide quantum dot and a zinc oxide-graphene quantum dot, in which the zinc oxide quantum dot emits yellow light when being irradiated with an excitation wavelength shorter than a wavelength corresponding to an energy band gap of the zinc oxide quantum dot, the zinc oxide-graphene quantum dot is in a form in which a zinc oxide quantum dot is bound with graphene via a Zn—O—C bond and emits blue-based light, and white light emission is possible through color rendering of yellow light emission by the zinc oxide quantum dot and blue-based light emission by the zinc oxide-graphene quantum dot.

A photon multiplying material containing a luminescent material having organic semiconductor molecules capable of singlet fission attached thereto, wherein the organic semiconductor molecules are chemically attached to the luminescent material by a linking group and wherein the linking group and the band gap of the luminescent material are selected so that exciton triplet states formed by singlet fission in the attached organic semiconductor molecules can be energy transferred into the luminescent material.

A colloidal nanostructure is provided associated with a heavy-metal-free semiconductor material.

A photon multiplying material comprising a luminescent material having organic semiconductor molecules capable of singlet fission attached thereto, wherein the organic semiconductor molecules are chemically attached to the luminescent material by a linking group and wherein the linking group and the band gap of the luminescent material are selected so that exciton triplet states formed by singlet fission in the attached organic semiconductor molecules can be energy transferred into the luminescent material.

An optically emissive material and, in particular, materials for use in single photon generation technologies, have multiple excited energy states that have different decay rates and can emit photons with different properties. A primary excitation radiation source is configured to apply primary radiation to an optically emissive material to excite the optically emissive material into a primary excited state. A secondary excitation radiation source is configured to apply secondary radiation to a thermal contribution material to generate thermal energy in the thermal contribution material. The thermal contribution material is physically configured to transfer thermal energy to the optically emissive material and excite the optically emissive material from the primary excited state to a secondary excited state for dynamic control of the emission rate, or emitted photon properties, of the optically emissive material.

An optically emissive material and, in particular, materials for use in single photon generation technologies, have multiple excited energy states that have different decay rates and can emit photons with different properties. A primary excitation radiation source is configured to apply primary radiation to an optically emissive material to excite the optically emissive material into a primary excited state. A secondary excitation radiation source is configured to apply secondary radiation to a thermal contribution material to generate thermal energy in the thermal contribution material. The thermal contribution material is physically configured to transfer thermal energy to the optically emissive material and excite the optically emissive material from the primary excited state to a secondary excited state for dynamic control of the emission rate, or emitted photon properties, of the optically emissive material.

The present invention relates to a composition comprising a nanoparticle.

The present disclosure provides a zinc oxide ink and a method for manufacturing the same, an electron transport layer and a display device. The zinc oxide ink includes zinc oxide nanoparticles loaded with ligands, wherein the ligand is derived from aliphatic compounds having a carbon chain of three or more carbon atoms and the ligand has a cross-linkable group at a site close to a coordination atom. The zinc oxide ink increases the steric hindrance among the zinc oxide nanoparticles, thereby preventing the aggregation between the zinc oxide nanoparticles, and accordingly and further avoiding the formation of black points in the formed layer. Meanwhile, the ligands have self-crosslinking property and thus form a web-like structure to prevent the formation of pores in the layer due to the rapid volatilization of the solvent, and the quality of the formed layer by using the zinc oxide ink is ensured.