Abstract:
A light emitting apparatus includes at least one first light source and at least one second light source. The at least one first light source and at least one second light source may be configured to emit white light and cyan light, respectively, such that a ratio of luminous flux of the white light to luminous flux of the cyan light ranges from 19:1 to 370:1, based on a common magnitude of electrical current being applied to each of the at least one first light source and the at least one second light source.
Abstract:
There is provided a semiconductor light emitting device including a first conductivity-type semiconductor base layer and a plurality of light emitting nanostructures disposed to be spaced apart from one another on the first conductivity-type semiconductor base layer, each light emitting nanostructure including a first conductivity-type semiconductor core, an active layer, an electric charge blocking layer, and a second conductivity-type semiconductor layer, respectively, wherein the first conductivity-type semiconductor core has different first and second crystal planes in crystallographic directions.
Abstract:
A nitride semiconductor light emitting device includes a substrate, a multi-layer structure, a light-transmitting concave-convex structure and a light emitting structure. The multi-layer structure has layers of a first layer and a second layer such that the first and second layers have different refractive indexes and are alternately stacked. The concave-convex structure is disposed in an upper surface of the multi-layer structure and includes a light-transmitting material. The light emitting structure is disposed on the multi-layer structure and includes a first conductive semiconductor layer, an active layer, and a second conductive semiconductor layer.
Abstract:
A semiconductor light emitting device includes a substrate, a buffer layer disposed on the substrate, the buffer layer comprising aluminum nitride, a composition grading layer disposed on the buffer layer, the composition grading layer comprising first aluminum nitride and second aluminum nitride, a capping layer disposed on the composition grading layer, and a cladding layer disposed on the capping layer. A composition of the first aluminum nitride and a composition of the second aluminum nitride change gradually in an alternating manner.
Abstract:
A pixel of a light emitting diode module, display panel or other device, may comprise different colored sub-pixels, where one of the sub-pixels comprises a wavelength converting material, such as phosphor, to convert light emitted from an associated light emitting diode of that sub-pixel into a color other than the main color of light emitted from that sub-pixel. The wavelength converting material may have an amount selected to tune the color coordinates of the pixel. The amount of wavelength converting material may be determined in response to measuring the intensity of the spectrum of light emitted by the light emitting diode of the sub-pixel, or similarly manufactured sub-pixels, on which the wavelength converting material is to be formed. Methods of manufacturing the same are also disclosed.
Abstract:
A semiconductor light emitting device includes a first conductivity-type semiconductor layer; an active layer disposed on the first conductivity-type semiconductor layer, and including: a plurality of quantum barrier layers; and a plurality of quantum well layers containing indium (In), the plurality of quantum barrier layers and the plurality of quantum well layers being alternately stacked on each other, the plurality of quantum well layers comprising a first quantum well layer and a second quantum well layer; and a second conductivity-type semiconductor layer disposed on the active layer, wherein the first quantum well layer is disposed closer to the first conductivity-type semiconductor layer than the second quantum well layer, wherein the second quantum well layer is disposed closer to the second conductivity-type semiconductor layer than the first quantum well layer, wherein a thickness of the second quantum well layer is greater than a thickness of the first quantum well layer, and wherein each of the first and the second quantum well layers comprises at least one graded layer having a varying amount of In composition, and the at least one graded layer of the second quantum well layer has a greater thickness than the at least one graded layer of the first quantum well layer.
Abstract:
A semiconductor ultraviolet light emitting device includes: a substrate; a buffer layer disposed on the substrate and comprising a plurality of nanorods between which a plurality of voids are formed; a first conductive nitride layer disposed on the buffer layer and having a first conductive AlGaN layer; an active layer disposed on the first conductive nitride layer and having a quantum well including AlxInyGa1-x-yN (0≦x+y≦1, 0≦y
Abstract translation:一种半导体紫外线发射装置,包括:基板; 缓冲层,其设置在所述基板上并且包括多个纳米棒,在所述多个纳米棒之间形成有多个空隙; 第一导电氮化物层,设置在所述缓冲层上并具有第一导电AlGaN层; 设置在第一导电氮化物层上并具有包括Al x In y Ga 1-x-y N(0≤x+y≤1,0≤y<0.15)的量子阱的有源层)。 以及设置在所述有源层上并具有第二导电AlGaN层的第二导电氮化物层,其中所述多个纳米棒满足3.5≤n(λ)×D /λ≤5.0,其中λ表示由所述活性物质产生的光的波长 层,n(λ)表示波长为λ的多个纳米棒的折射率,D表示多个纳米棒的直径。
Abstract:
According to an example embodiment, a method of manufacturing a nanostructure semiconductor light-emitting device includes forming nanocores of a first-conductivity type nitride semiconductor material on abase layer to be spaced apart from each other, and forming a multilayer shell including an active layer and a second-conductivity type nitride semiconductor layers on surfaces of each of the nanocores. At least a portion the multilayer shell is formed by controlling at least one process parameter of a flux of source gas, a flow rate of source gas, a chamber pressure, a growth temperature, and a growth rate so as to have a higher film thickness uniformity.
Abstract:
A nanostructure semiconductor light emitting device includes: a base layer formed of a first-conductivity type nitride semiconductor material; and a plurality of light emitting nanostructures disposed on the base layer to be spaced apart from each other, wherein each of the plurality of light emitting nanostructures includes: a nanocore formed of a first conductivity-type nitride semiconductor material, an active layer disposed on a surface of the nanocore and including a quantum well which is divided into first and second regions having different indium (In) composition ratios in a thickness direction thereof; and a second conductivity-type semiconductor layer disposed on the active layer, and an In composition ratio in the first region is higher than an In composition ratio in the second region.
Abstract:
There is provided a semiconductor light emitting device including a first conductivity-type semiconductor base layer and a plurality of light emitting nanostructures disposed to be spaced apart from one another on the first conductivity-type semiconductor base layer, each light emitting nanostructure including a first conductivity-type semiconductor core, an active layer, an electric charge blocking layer, and a second conductivity-type semiconductor layer, respectively, wherein the first conductivity-type semiconductor core has different first and second crystal planes in crystallographic directions.