Abstract: There is provided an inorganic layer light-emitting device including: a light-emitting layer including an emission body made of an inorganic material; and a metal-based particle assembly layer being a layer consisting of a particle assembly including 30 or more metal-based particles separated from each other and disposed in two-dimensions, said metal-based particles having an average particle diameter in a range of from 200 to 1600 nm, an average height in a range of from 55 to 500 nm, and an aspect ratio in a range of from 1 to 8, and said metal-based particles that compose said metal-based particle assembly layer are disposed such that an average distance between adjacent metal-based particles is in a range of from 1 to 150 nm. The inorganic layer light-emitting device exhibits high luminous efficiency through emission enhancement and improvement in light extraction efficiency.

Abstract: There is provided a quantum dot light-emitting device including: a light-emitting layer containing a quantum dot luminescent material; and a metal-based particle assembly layer being a layer consisting of a particle assembly including 30 or more metal-based particles separated from each other and disposed in two-dimensions, said metal-based particles having an average particle diameter in a range of 200 to 1600 nm, an average height in a range of 55 to 500 nm, and an aspect ratio, as defined by a ratio of said average particle diameter to said average height, in a range of 1 to 8, wherein said metal-based particles that compose said metal-based particle assembly layer are disposed such that an average distance between adjacent metal-based particles may be in a range of 1 to 150 nm. The quantum dot light-emitting device provides enhanced emission via the metal-based particle assembly layer and thus presents high luminous efficiency.

Abstract: Provided are a metal-based particle assembly comprising 30 or more metal-based particles separated from each other and disposed in two dimensions, the metal-based particles having an average particle diameter of 200 to 1600 nm, an average height of 55 to 500 nm, and an aspect ratio, as defined by a ratio of the average particle diameter to the average height, of 1 to 8, the metal-based particle assembly having a scattering intensity ratio S1/S0 of not less than 0.15, S1 representing a scattering intensity at a maximum wavelength of a peak having a highest peak intensity in a scattering spectrum of light scattered at an angle of 30° from light incident on a surface of the metal-based particle assembly along a normal to the surface, So representing a scattering intensity of the peak for a reference system made of a barium sulfate layer, and an optical device including the assembly.

Abstract: There is provided a method for producing a metal-based particle assembly, comprising the steps of: producing a metal-based film having an average thickness equal to or smaller than 50 nm on a substrate (a first step); and morphologically changing the metal-based film through a heat treatment into a metal-based particle assembly comprising a plurality of metal-based particles mutually separated and disposed in two dimensions (a second step). The method allows a metal-based particle assembly to be produced that for example includes 30 or more metal-based particles having an average particle diameter in a range of from 200 to 1600 nm, an average height in a range of from 55 to 500 nm, and an aspect ratio, as defined by a ratio of the average particle diameter to the average height, in a range of from 1 to 8.

Abstract: There is provided an inorganic layer light-emitting device including: a light-emitting layer including an emission body made of an inorganic material; and a metal-based particle assembly layer being a layer consisting of a particle assembly including 30 or more metal-based particles separated from each other and disposed in two-dimensions, said metal-based particles having an average particle diameter in a range of from 200 to 1600 nm, an average height in a range of from 55 to 500 nm, and an aspect ratio in a range of from 1 to 8, and said metal-based particles that compose said metal-based particle assembly layer are disposed such that an average distance between adjacent metal-based particles is in a range of from 1 to 150 nm. The inorganic layer light-emitting device exhibits high luminous efficiency through emission enhancement and improvement in light extraction efficiency.

Abstract: There is provided a quantum dot light-emitting device including: a light-emitting layer containing a quantum dot luminescent material; and a metal-based particle assembly layer being a layer consisting of a particle assembly including 30 or more metal-based particles separated from each other and disposed in two-dimensions, said metal-based particles having an average particle diameter in a range of 200 to 1600 nm, an average height in a range of 55 to 500 nm, and an aspect ratio, as defined by a ratio of said average particle diameter to said average height, in a range of 1 to 8, wherein said metal-based particles that compose said metal-based particle assembly layer are disposed such that an average distance between adjacent metal-based particles may be in a range of 1 to 150 nm. The quantum dot light-emitting device provides enhanced emission via the metal-based particle assembly layer and thus presents high luminous efficiency.

Abstract: There is provided a photoelectric conversion device including: an active layer; and a metal-based particle assembly layer consisting of a particle assembly including 30 or more metal-based particles separated from each other and disposed in two dimensions, the metal-based particles having an average particle diameter in a range of from 10 to 1600 nm, an average height in a range of from 5 to 500 nm, and an aspect ratio in a range of from 0.5 to 8, the metal-based particles being disposed such that an average distance between adjacent metal-based particles may be in a range of from 1 to 150 nm. The photoelectric conversion device exhibits a high conversion efficiency achieved through enhancement of an electric field by the metal-based particle assembly layer.

Abstract: There is provided a metal-based particle assembly comprising 30 or more metal-based particles separated from each other and disposed in two dimensions, the metal-based particles having an average particle diameter in a range of from 200 to 1600 nm, an average height in a range of from 55 to 500 nm, and an aspect ratio, as defined by a ratio of the average particle diameter to the average height, in a range of from 1 to 8, wherein the metal-based particles are disposed such that an average distance between adjacent metal-based particles may be in a range of from 1 to 150 nm. This metal-based particle assembly presents significantly intense plasmon resonance and also allows plasmon resonance to have an effect over a range extended to a significantly large distance.

Abstract: There is provided a metal-based particle assembly comprising 30 or more metal-based particles separated from each other and disposed in two dimensions, the metal-based particles having an average particle diameter in a range of from 200 to 1600 nm, an average height in a range of from 55 to 500 nm, and an aspect ratio, as defined by a ratio of the average particle diameter to the average height, in a range of from 1 to 8, wherein the metal-based particle assembly has in an absorption spectrum for a visible light region a maximum wavelength of a peak at a longest side in wavelength, and an absorbance at the maximum wavelength is higher as compared with that of a reference metal-based particle assembly, on the premise that the numbers of the metal-based particles are the same. The metal-based particle assembly of the present invention presents significantly intense plasmon resonance.

Abstract: There is provided a metal-based particle assembly comprising 30 or more metal-based particles separated from each other and disposed in two dimensions, the metal-based particles having an average particle diameter of 200 to 1600 nm, an average height of 55 to 500 nm, and an aspect ratio of 1 to 8, wherein the metal-based particle assembly has in an absorption spectrum for a visible light region a maximum wavelength of a peak at a longest side in wavelength, and the maximum wavelength shifts toward a shorter side in wavelength in a range of from 30 to 500 nm as compared with that of a prescribed reference metal-based particle assembly. The metal-based particle assembly can have in an absorption spectrum a maximum wavelength of a peak at a longest side in wavelength, and the maximum wavelength is in a range of from 350 to 550 nm.

Abstract: There is provided an organic electroluminescence device including: first and second electrode layers; a light-emitting layer 50 disposed between the first electrode layer and the second electrode layer; and a metal-based particle assembly layer being a layer consisting of a particle assembly including 30 or more metal-based particles separated from each other and disposed in two dimensions, the metal-based particles having an average particle diameter in a range of from 200 to 1600 nm, an average height in a range of from 55 to 500 nm, and an aspect ratio in a range of from 1 to 8, the metal-based particles being disposed such that an average distance between adjacent metal-based particles may be in a range of from 1 to 150 nm. The organic electroluminescence device provides enhanced emission and improvement of light extraction efficiency via the metal-based particle assembly layer and thus presents high luminous efficiency.