Provided is a light-emitting device that can display an image with a wide color gamut or a novel light-emitting element. The light-emitting device includes a plurality of light-emitting elements each of which includes an EL layer between a pair of electrodes. Light obtained from a first light-emitting element through a first color filter has, on chromaticity coordinates (x, y), a chromaticity x of greater than 0.680 and less than or equal to 0.720 and a chromaticity y of greater than or equal to 0.260 and less than or equal to 0.320. Light obtained from a second light-emitting element through a second color filter has, on chromaticity coordinates (x, y), a chromaticity x of greater than or equal to 0.130 and less than or equal to 0.250 and a chromaticity y of greater than 0.710 and less than or equal to 0.810. Light obtained from a third light-emitting element through a third color filter has, on chromaticity coordinates (x, y), a chromaticity x of greater than or equal to 0.120 and less than or equal to 0.170 and a chromaticity y of greater than or equal to 0.020 and less than 0.060.

An organic light-emitting diode substrate is provided. The organic light-emitting diode substrate comprises a substrate; a conductive layer formed over the substrate comprising a plurality of anodes and a plurality of cathodes, wherein each of the anodes are electrically insulated from the rest of the anodes and the cathodes; and a light-emitting layer formed over the plurality of anodes and the plurality of cathodes and being electrically connected with the plurality of anodes and the plurality of cathodes.

An organic device comprising a reflective electrode, an organic layer arranged on the reflective electrode, a semi-transmissive electrode arranged on the organic layer and a reflection surface formed above the semi-transmissive electrode is provided. The organic layer emits white light and includes a blue-emitting layer. An optical distance L of the organic layer satisfies L≥[{(ϕr+ϕs)/π}×(λb/4)]×1.2, where λb is a peak wavelength of the blue-emitting layer, ϕr and ϕs are a phase shift of the wavelength λb in the reflective electrode and the semi-transmissive electrode, respectively. A resonant wavelength of an optical distance between the semi-transmissive electrode and the reflection surface is shorter than the wavelength λb.

An organic electroluminescence device according to one aspect of the present invention includes: a base material having a top surface on which a recess is provided; a reflective layer provided along at least a surface of the recess; a filling layer filled inside the recess via the reflective layer, the filling layer having light transmissivity; a first electrode provided at least on an upper layer side of the filling layer, the first electrode having light transmissivity; an organic layer provided on an upper layer side of the first electrode, the organic layer including at least a light emitting layer; and a second electrode provided on an upper layer side of the organic layer, the second electrode having light transmissivity, wherein a coloring material is mixed into the filling layer.

The present invention relates to an OLED display panel comprising a first electrode, and a first hole transporting layer, a second hole transporting layer, and an electron transporting layer stacked on the first electrode, and a second electrode formed; at least two light emitting units are provided on the second hole transporting layer; the electron transporting layer covers the light emitting units; the material of the electron transporting layer fills the gap(s) between adjacent light emitting units; the first hole transporting layer comprises a hole transporting material which has a hole mobility of 9×10.sup.−5-5×10.sup.4 cm.sup.2/V.Math.S, and a solubility of 10 g/L or more in a cleaning solvent at 25° C. The present invention utilizes a hole transporting material having a specific hole mobility as a common hole transporting layer, avoiding crosstalks between different pixels.

The invention provides a manufacturing method of a pixel structure of an organic light-emitting diode display panel. First transparent anodes located in first pixel regions and fifth pixel regions, second transparent anodes located in second pixel regions and sixth pixel regions, and third transparent anodes located in third pixel regions and fourth pixel regions are formed on a substrate. A first organic light-emitting layer is formed inside the third pixel regions and the fourth pixel regions via a first fine metal mask. A second organic light-emitting layer is formed inside the fifth pixel regions, the sixth pixel regions, the first pixel regions, and the second pixel regions via a second fine metal mask. First cathodes, second cathodes, and third cathodes are formed on the substrate.

Provided are a method for preparing an organic electroluminescent device, an organic electroluminescent device and a display apparatus. The method for preparing the organic electroluminescent device includes: providing a substrate; forming, on the substrate, a red light reflective electrode located in a red sub-pixel preparation region, a green light reflective electrode located in a green sub-pixel preparation region, and a blue light reflective electrode located in a blue sub-pixel preparation region; forming a transparent insulating layer on a surface of a side of the red light reflective electrode facing away from the substrate, where the area of the transparent insulating layer is smaller than the area of the red light reflective electrode; and forming a transparent conductive layer on a surface of a side of the transparent insulating layer facing away from the substrate, a surface of the side of the red light reflective electrode facing away from the substrate and not covered by the transparent insulating layer, and a surface of a side of the green light reflective electrode facing away from the substrate.

It is an object to provide a flexible light-emitting device with long lifetime in a simple way and to provide an inexpensive electronic device with long lifetime using the flexible light-emitting device. A flexible light-emitting device is provided, which includes a substrate having flexibility and a light-transmitting property with respect to visible light; a first adhesive layer over the substrate; an insulating film containing nitrogen and silicon over the first adhesive layer; a light-emitting element including a first electrode, a second electrode facing the first electrode, and an EL layer between the first electrode and the second electrode; a second adhesive layer over the second electrode; and a metal substrate over the second adhesive layer, wherein the thickness of the metal substrate is 10 μm to 200 μm inclusive. Further, an electronic device using the flexible light-emitting device is provided.

A light-emitting device includes a plurality of organic EL elements. Each of the organic EL elements includes a reflection electrode, a hole transport region, an electron-trapping luminescent layer, and a light extraction electrode in this order. The hole transport region has a sheet resistance of 4.0×10.sup.7 Ω/sq.⋅ or more at a current of 0.1 nA/pixel, and the total thickness of the hole transport region and the electron-trapping luminescent layer is equivalent to an optical path length enabling emission from the electron-trapping luminescent layer to be enhanced.

A light-emitting device includes a plurality of organic EL elements. Each of the organic EL elements includes a reflection electrode, a hole transport region, an electron-trapping luminescent layer, and a light extraction electrode in this order. The hole transport region has a sheet resistance of 4.0×10.sup.7 Ω/sq.⋅ or more at a current of 0.1 nA/pixel, and the total thickness of the hole transport region and the electron-trapping luminescent layer is equivalent to an optical path length enabling emission from the electron-trapping luminescent layer to be enhanced.