WO2014108289A1 - Optoelektronischer halbleiterchip - Google Patents
Optoelektronischer halbleiterchip Download PDFInfo
- Publication number
- WO2014108289A1 WO2014108289A1 PCT/EP2013/077199 EP2013077199W WO2014108289A1 WO 2014108289 A1 WO2014108289 A1 WO 2014108289A1 EP 2013077199 W EP2013077199 W EP 2013077199W WO 2014108289 A1 WO2014108289 A1 WO 2014108289A1
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- WO
- WIPO (PCT)
- Prior art keywords
- semiconductor chip
- active elements
- emitting
- active
- light
- Prior art date
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- GKOZUEZYRPOHIO-UHFFFAOYSA-N iridium atom Chemical compound [Ir] GKOZUEZYRPOHIO-UHFFFAOYSA-N 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L33/00—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L33/48—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by the semiconductor body packages
- H01L33/50—Wavelength conversion elements
- H01L33/501—Wavelength conversion elements characterised by the materials, e.g. binder
- H01L33/502—Wavelength conversion materials
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K11/00—Luminescent, e.g. electroluminescent, chemiluminescent materials
- C09K11/06—Luminescent, e.g. electroluminescent, chemiluminescent materials containing organic luminescent materials
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L27/00—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate
- H01L27/15—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components having potential barriers, specially adapted for light emission
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L33/00—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L33/02—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by the semiconductor bodies
- H01L33/16—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by the semiconductor bodies with a particular crystal structure or orientation, e.g. polycrystalline, amorphous or porous
- H01L33/18—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by the semiconductor bodies with a particular crystal structure or orientation, e.g. polycrystalline, amorphous or porous within the light emitting region
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L33/00—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L33/02—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by the semiconductor bodies
- H01L33/26—Materials of the light emitting region
- H01L33/30—Materials of the light emitting region containing only elements of Group III and Group V of the Periodic Table
- H01L33/32—Materials of the light emitting region containing only elements of Group III and Group V of the Periodic Table containing nitrogen
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L33/00—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L33/48—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by the semiconductor body packages
- H01L33/50—Wavelength conversion elements
- H01L33/505—Wavelength conversion elements characterised by the shape, e.g. plate or foil
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- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L33/00—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L33/48—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by the semiconductor body packages
- H01L33/50—Wavelength conversion elements
- H01L33/507—Wavelength conversion elements the elements being in intimate contact with parts other than the semiconductor body or integrated with parts other than the semiconductor body
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L33/00—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L33/48—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by the semiconductor body packages
- H01L33/52—Encapsulations
- H01L33/56—Materials, e.g. epoxy or silicone resin
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G2261/00—Macromolecular compounds obtained by reactions forming a carbon-to-carbon link in the main chain of the macromolecule
- C08G2261/30—Monomer units or repeat units incorporating structural elements in the main chain
- C08G2261/31—Monomer units or repeat units incorporating structural elements in the main chain incorporating aromatic structural elements in the main chain
- C08G2261/314—Condensed aromatic systems, e.g. perylene, anthracene or pyrene
- C08G2261/3142—Condensed aromatic systems, e.g. perylene, anthracene or pyrene fluorene-based, e.g. fluorene, indenofluorene, or spirobifluorene
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G2261/00—Macromolecular compounds obtained by reactions forming a carbon-to-carbon link in the main chain of the macromolecule
- C08G2261/30—Monomer units or repeat units incorporating structural elements in the main chain
- C08G2261/34—Monomer units or repeat units incorporating structural elements in the main chain incorporating partially-aromatic structural elements in the main chain
- C08G2261/342—Monomer units or repeat units incorporating structural elements in the main chain incorporating partially-aromatic structural elements in the main chain containing only carbon atoms
- C08G2261/3422—Monomer units or repeat units incorporating structural elements in the main chain incorporating partially-aromatic structural elements in the main chain containing only carbon atoms conjugated, e.g. PPV-type
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G2261/00—Macromolecular compounds obtained by reactions forming a carbon-to-carbon link in the main chain of the macromolecule
- C08G2261/50—Physical properties
- C08G2261/52—Luminescence
- C08G2261/522—Luminescence fluorescent
- C08G2261/5222—Luminescence fluorescent electrofluorescent
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G2261/00—Macromolecular compounds obtained by reactions forming a carbon-to-carbon link in the main chain of the macromolecule
- C08G2261/90—Applications
- C08G2261/95—Use in organic luminescent diodes
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G61/00—Macromolecular compounds obtained by reactions forming a carbon-to-carbon link in the main chain of the macromolecule
- C08G61/02—Macromolecular compounds containing only carbon atoms in the main chain of the macromolecule, e.g. polyxylylenes
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K2211/00—Chemical nature of organic luminescent or tenebrescent compounds
- C09K2211/14—Macromolecular compounds
- C09K2211/1408—Carbocyclic compounds
- C09K2211/1416—Condensed systems
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L33/00—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L33/02—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by the semiconductor bodies
- H01L33/08—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by the semiconductor bodies with a plurality of light emitting regions, e.g. laterally discontinuous light emitting layer or photoluminescent region integrated within the semiconductor body
Definitions
- the invention relates to an optoelectronic
- Optoelectronic semiconductor chips such as, for example, light-emitting diodes (LEDs)
- LEDs often have outcoupling elements, such as, for example, a casting with a conversion substance. Conversions convert the radiation emitted by an active layer of the LED into radiation with altered, for example longer, radiation
- the object of at least one embodiment of the present invention is to provide an optoelectronic semiconductor chip in which the losses due to non-radiative decay processes of excitons are minimized, or almost completely prevented, and thus the luminous efficacy of the optoelectronic semiconductor chip is significantly increased.
- the task is carried out by an optoelectronic
- the optoelectronic semiconductor chip comprises a plurality of active elements, which are arranged at a distance from one another, and a carrier, which is arranged transversely to the active elements.
- the active elements each have a major axis that is perpendicular to the carrier.
- the main axes are aligned parallel to each other.
- the active elements have lateral surfaces, wherein at least one converter material surrounds the multiplicity of active elements on the lateral surfaces.
- the converter material comprises a conversion substance or a conversion substance and a
- the active elements each have a central core area which is sheathed in at least two layers.
- An active layer encases the core area and a cover layer encases the active layer.
- Core region is formed with a first semiconductor material and the active layer comprises a light-emitting
- the cover layer is with a second
- Semiconductor material is formed and has a layer thickness between 0.1 nm and 100 nm.
- Deviation of parallelism from 0 to 20 g. preferably 0 to
- the active elements have a greater extent along the main axis than transverse to the main axis. This means that the active elements do not extend the same distance in each spatial direction, but the expansion of the active elements parallel to the main axis is greater than that perpendicular to the main axis.
- the extent parallel to the main axis of the active elements is 1 to 100 ym, preferably 1 to 50 ym, particularly preferably 1 to 10 ym.
- the cover layer preferably has a layer thickness between 0.1 nm and 50 nm, particularly preferably a layer thickness between 0.1 nm and 10 nm and very particularly preferably a layer thickness between 0.1 nm and 4 nm.
- the cover layer preferably has a uniform layer thickness.
- the active layer and the cover layer are in direct contact with each other.
- the layer thickness of the cover layer in this embodiment corresponds to the distance between the active layer and the converter material.
- the cover layer can partially or completely cover the active layer and cover it partially or completely.
- the distance between the active layer and the converter material is 0.1 to 100 nm
- nm preferably at 0.1 to 50 nm, more preferably at 0.1 to 10 nm, most preferably at 0.1 to 4 nm.
- the distance between the active layer and the converter material is between 0.1 and 100 nm, that in the active elements, and in particular in the active element, decays
- Matrix material or refer to both.
- Converter material can be used.
- the transmission of the excitons to the converter material is faster than the non-radiative decay of the excitons in the light-emitting material.
- Transmission occurs within a period of 1 ps to 10 ns, for example within 1 to 20 ps or 1 to 10 ns. The lifetime of an exciton until the
- Radiation-free decay is usually 1 ys.
- the electrons occupying the excited energy levels are preferred
- T is the operating temperature and k is the
- Converter material the same multiplicity. This increases the probability of transmission of the excitons and thus of the energy.
- the adjusted excited energy levels may be first excited singlet and / or triplet states. But it is also conceivable that other energy levels in the
- the converter material converts the electromagnetic primary radiation at least partially into an electromagnetic secondary radiation. At least
- Secondary electromagnetic radiation may include one or more wavelengths and / or wavelength ranges in one
- Secondary radiation be narrowband, that is, the primary radiation and / or the secondary radiation then have a monochrome or approximately monochrome wavelength range.
- the spectrum of the primary radiation and / or the spectrum of the secondary radiation may alternatively also
- Wavelength range wherein the mixed-color wavelength range may have a continuous spectrum or a plurality of discrete spectral components with different wavelengths.
- the primary radiation and the secondary radiation can be
- the primary radiation can preferably give rise to a blue-colored luminous impression and the secondary radiation can produce a yellowish-colored luminous impression, which can result from spectral components of the secondary radiation in the yellow wavelength range and / or spectral components in the green and red wavelength ranges. It is also possible that the electromagnetic primary radiation completely or almost completely converted into an electromagnetic secondary radiation.
- Electromagnetic primary radiation is here completely or almost completely by the converter material
- the emitted radiation of the optoelectronic component according to this embodiment thus corresponds completely or almost completely to the electromagnetic secondary radiation. Under almost
- Full conversion is a conversion over 90%, especially over 95% to understand.
- the primary radiation is in the UV range and the secondary radiation gives rise to a blue-colored and yellow-colored luminous impression, which can be caused by spectral components of the secondary radiation in the blue and yellow wavelength range and / or spectral components in the blue, green and red wavelength range.
- the secondary radiation gives rise to a blue-colored and yellow-colored luminous impression, which can be caused by spectral components of the secondary radiation in the blue and yellow wavelength range and / or spectral components in the blue, green and red wavelength range.
- the electromagnetic secondary radiation is in a blue to infrared
- the secondary radiation can then be in the infrared range of the electromagnetic
- Decay of the excitons in the light emitting material of active layer emitted electromagnetic primary radiation in the UV range to green range, preferably in the UV range to blue range of the electromagnetic spectrum.
- the light-emitting material of the active layer emits electromagnetic primary radiation in the UV range to green range, preferably in the UV range to blue range of the electromagnetic spectrum.
- Light-emitting material of the active layer may also be primary electromagnetic radiation in the infrared region or in the red region of the electromagnetic spectrum
- Light emission either by the third semiconductor material or the converter material can be used.
- the luminance of the optoelectronic semiconductor chip is increased.
- Material a material that has a high oscillator strength
- Transfer converter material It can be about
- the light-emitting material may also be based on or consist of an I I I / V semiconductor material system.
- the light-emitting material may also be based on or consist of an I I I / V semiconductor material system.
- the light-emitting material is AlInGaN.
- the active elements have a diameter perpendicular to the main axis of the active elements, wherein the minimum distance of the active elements
- Diameter It is also possible that the distance of the active elements is 20 or 10 ym.
- the distribution of the active elements on the carrier is uniform according to one embodiment. This means that at least in the context of manufacturing tolerance, the active elements are evenly distributed on the carrier.
- the active elements are N-phenyl-N-phenyl-N-phenyl-N-phenyl-N-phenyl-N-phenyl-N-phenyl-N-phenyl-N-phenyl-N-phenyl-N-phenyl-N-phenyl-N-phenyl-N-phenyl-N-phenyl-N-phenyl-N-phenyl-N-phenyl-N-phenyl
- predetermined intervals from each other for example, in a plan view of the opposite side of the carrier of the active elements is a regular
- Lattice structure such as the structure of a
- Rectangular grid or a triangular grid recognizable.
- a random distribution of the active elements is also possible.
- the converter material completely occupies the spaces between the active elements.
- the diameter of the active elements perpendicular to their major axis is 1 ym to 2 ym or 2 ym to 4 ym.
- the converter material is in contact with the cover layer via dipole-dipole interactions
- the converter material in particular the conversion substance and / or the matrix material, may comprise UV-curing polymers, temperature-curing polymers and / or 2-component polymers or one or more of these polymers
- the converter material comprises a conversion substance and a matrix material, wherein the conversion substance is homogeneously distributed in the matrix material. It is also possible that the conversion substance has a higher concentration in the region adjacent to the active elements than in regions of the converter material that are further away from the active elements.
- the matrix material is selected from a group comprising silicones, ester-containing polymers, epoxy-containing polymers, amine-containing polymers, polyacetylene-containing polymers, vinyl-containing polymers, carbazole-containing polymers, acryl-containing polymers, styrene containing polymers and inorganic hybrid materials or combinations thereof.
- the conversion substance is a light-emitting polymer, an inorganic phosphor, an organic molecule or a transition metal complex.
- Suitable organic molecules are laser dyes and / or materials which find application in organic light-emitting diodes.
- the xanthenes can be rhodamines.
- the perylenes have the following
- R are selected from the group consisting of H, saturated and unsaturated alkyl radicals, fully or partially substituted saturated and unsaturated alkyl radicals,
- Aromatics fully or partially substituted aromatics, fused aromatics, in whole or in part
- the perylene is to
- organic molecules used in organic light-emitting diodes are:
- the converter material comprises several conversion substances.
- Converter material comprise a light-emitting polymer and an inorganic phosphor.
- the inorganic phosphor may be a quantum dot.
- a quantum dot is a material structure which, for example, consists of 10 4 atoms.
- the energy levels are adjustable by the choice of material, the shape and the size of the quantum dots. Because the quantum dots are low Have dimensions, the active elements can be arranged with a small distance from each other.
- the inorganic phosphor is selected from a group consisting of cadmium selenide,
- Cadmium oxide, indium oxide, copper indium oxide The
- Phosphors may be coated with zinc sulfide or zinc selenide.
- transition metal complexes mono- or polynuclear transition metal complexes with transition metals can be selected as central atom (s). Preference is given to using mononuclear iridium or platinum complexes. preferred
- Transition metal complexes are iridium complexes. Particularly preferred are iridium complexes.
- the iridium complexes may have the following structures:
- the light-emitting polymer has a blue spectral region emitting
- the light-emitting polymer can absorb an electromagnetic primary radiation in the UV range or in the UV range to blue spectral range and emit blue light through the blue basic skeleton, which in turn is completely or partially from the side chains in
- the light-emitting polymer comprises a fluorene-containing or a para-phenylene-vinylene-containing polymer.
- the para-phenylene-vinylene-containing polymer has the formula:
- R 1, R 2, R 3, R 4, R 5 and R 6 may be the same or different and are selected from the group consisting of H, saturated and unsaturated alkyl radicals, fully or partially substituted saturated and unsaturated radicals
- x, y, z can be the same or different and 1 ⁇ x, y, z ⁇ 1000.
- the para-phenylene vinylene-containing polymer has the formula:
- R 1 ', R 3', R 5 'and R 6' may be the same or different and are selected from the group consisting of H, saturated and unsaturated alkyl radicals, fully or partially substituted saturated and unsaturated
- Alkyl radicals aromatics, in whole or in part
- x, y, z can be the same or different and 1 ⁇ x, y, z ⁇ 1000.
- the para-phenylene vinylene-containing polymer emits secondary electromagnetic radiation in the yellow region of the electromagnetic spectrum.
- the radicals R1 ', R3', R5 'and R6' are selected from a group comprising heterocycles, fully or partially substituted heterocycles, fused heterocycles, fully or partially substituted fused
- Heterocycles includes. Particular preference is given to sulfur, nitrogen and / or oxygen-containing
- para-phenylene vinylene-containing polymer has the following formula
- x, y, z can be the same or different and 1 ⁇ x, y, z ⁇ 1000.
- Conversion material and / or the matrix material are electrically conductive.
- Formed nitride compound semiconductor material so it has a relatively low transverse conductivity.
- a p-side contacting of the active elements is possible by means of the electrically conductive converter material.
- the electrically conductive converter material By the electrically conductive converter material, a uniform energization of the active layer of the active elements is possible.
- the carrier is that element of the optoelectronic semiconductor chip which mechanically supports and supports the plurality of active elements.
- the carrier can also be that element of the
- the carrier may be, for example, a
- the carrier may be made of GaAs, for example,
- Silicon, glass or sapphire be formed. It is next possible that the carrier at least one of said
- the carrier is a growth substrate, then the growth substrate remains in the
- Thinning of the growth substrate that is, a reduction in the thickness of the growth substrate by
- the carrier can be at least partially radiopaque, radiation-permeable, radiation-reflecting or diffusely scattering. This means that the primary radiation generated in the active elements during operation of the semiconductor chip and / or electromagnetic generated in the converter material
- Secondary radiation can pass through the carrier or not, or is reflected or scattered at this.
- the active elements in the form of a cylinder, a truncated cone, a regular truncated pyramid, a regular pyramid with
- the plurality of active elements is formed by a longitudinally elongated three-dimensional body and, for example, does not have the shape of a planar one
- the active elements are not a continuous unstructured layer.
- the first semiconductor material is n-conductive.
- the first semiconductor material may, for example, be deposited on an n-doped III / V
- the first semiconductor material is based on an n-doped
- the first semiconductor material may be based on n-type GaN, InGaN, AlGaN or AlInGaN. It is possible that the first
- the core regions of the active elements may have the same type of spatial shape as the active elements.
- the core region may also be the
- the core region can then be embodied in particular as a solid body, which consists of the first semiconductor material.
- the core area may have a diameter perpendicular to
- Major axis of the active elements of 1 nm to 5 ym, preferably from 1 nm to 1 ym, most preferably from 1 nm to 300 nm.
- the core area can, for example, a
- Diameter perpendicular to the major axis of the active elements from 40 nm to 100 nm
- the core region has a
- Mantle surface which is partially or preferably completely covered by the active layer.
- the end face of the core region can also be covered at least in places.
- the core area can be directly to the active layer
- the active layer preferably has a uniform layer thickness.
- the layer thickness is 1 to 30 nm, preferably 1 to 10 nm.
- the second semiconductor material may be a semiconductor material which is based on the same semiconductor material system as the first semiconductor material, but has a different doping.
- the second semiconductor material may be p-type, for example, the second one is based
- the multiplicity of active elements can be of similar construction. This means that at least in the context of
- the active elements are the same design. But it is also possible that the optoelectronic semiconductor chip comprises a plurality of active elements, which are at least partially formed differently. For example, the active elements may differ in their dimensions in parallel and transverse to the major axis.
- DROOP effect indicates a significant drop in efficiency with increasing current or carrier density.
- Cross-sectional area of the semiconductor chip is.
- the active elements are embodied, for example, as "core shell nano- or microrods", ie as core-shell nano- or micro-rods
- electromagnetic radiation is generated, compared to an optoelectronic semiconductor chip, which has a single active region, e.g. has an active layer, and which is unstructured, for example. In this way, the efficiency of the semiconductor chip is increased. Due to the fact that one described here
- Optoelectronic semiconductor chip having a plurality of active elements a significant increase in the active area and thus an increase in efficiency under operating conditions is achieved with reduced carrier density. Further, with epitaxial growth of the active elements that are spaced apart from each other, a reduction in the size of a closed two-dimensional layer Tension in the semiconductor material of the active elements can be achieved.
- Optoelectronic semiconductor chip with two, more than two, more than 100, preferably more than 1000, in particular more than 10,000 or more than 100,000 active elements form.
- Layers can have cavities.
- the surfaces of the active layers may also be roughened or provided with a three-dimensional topography. Increasing the active area results in an increase in efficiency under operating conditions at reduced
- Carrier density Also possible is a fractal
- the central core region is sheathed in three layers. It is possible that the cover layer is covered with a first contact layer. The cover layer is in this case partially or completely from the first
- the Contact layer are in particular in direct contact with each other.
- the first contact layer is in operation for the electromagnetic generated in the active layer
- cover layer Primary radiation transparent. If the cover layer is covered by a p- formed conductive nitride compound semiconductor material, so it has a relatively low transverse conductivity. The provision of a first contact layer leads to a
- the first contact layer covers the cover layer, for example as a layer, which is part of the
- Manufacturing tolerance may have a uniform thickness.
- the thickness of the first contact layer is 1 to 30 nm, preferably 1 to 10 nm.
- the converter material is preferably electrically non-conductive
- the first contact layer is composed of a
- the bandgap Eg is greater than or equal to the shortest wavelength emitted primary radiation of the active region.
- Eg is equal to 2.2 eV or 2.0 eV for
- the band gap Eg is greater than or equal to 4 eV, preferably greater than or equal to 3 eV, particularly preferably greater than or equal to 2.8 eV, with a primary radiation which is in the blue region of the
- the first contact layer is formed with a transparent conductive oxide.
- Semiconductor chips is a second contact layer with the
- Core regions of at least a large part, in particular of all active elements of the optoelectronic semiconductor chip, in direct contact, that is to say all core regions or at least a majority of all core regions are electrically conductively connected via a single common second contact layer. If the core region is n-type, an n-side contacting of the active elements by means of the electrically conductive second contact layer is possible.
- the second contact layer may in particular at least partially extend in a plane which
- the active elements are then arranged between the carrier and the second contact layer.
- At least a majority of the active elements designates at least 75%, preferably at least 85%, in particular at least 95%, of the active elements of the optoelectronic semiconductor chip.
- Substantially parallel means that the second contact layer extends at least in places in a plane which runs parallel to the carrier within the manufacturing tolerance.
- the cover layer and the first contact layer or the cover layer and the converter material are separated by a passivation of the electrically conductive second contact layer.
- the passivation can be done with the core area of the active Elements are in direct contact and is then located on the side facing away from the carrier of the active elements on the lateral surface, for example, in direct contact with the cover layer and the first contact layer or the
- the passivation may terminate flush with the side of the core region facing away from the carrier and be in direct contact with the second contact layer on its side facing away from the carrier.
- the passivation for example, by covering the
- Semiconductor chips is the second contact layer for those generated in the active elements during operation
- a transmissive second contact layer may be formed, for example, with a transparent conductive oxide.
- a reflective second contact layer may be metallic,
- a reflective metal such as silver, gold, titanium, platinum, palladium, tungsten, osmium and / or Aluminum be formed.
- a reflective metal such as silver, gold, titanium, platinum, palladium, tungsten, osmium and / or Aluminum be formed.
- the support is preferred
- radiolucent formed At least a majority of the optoelectronic semiconductor chip in operation
- radiated electromagnetic radiation is then radiated through the carrier.
- Optoelectronic semiconductor chip a reflective layer, which is disposed above the carrier on the same side as the plurality of active elements. It is possible that the optoelectronic semiconductor chip a single
- the reflective layer that connects all the active elements of the optoelectronic semiconductor chip with each other.
- the active elements can at least in places directly border the reflective layer.
- the semiconductor chip can be produced particularly cost-effectively, since the required process steps and processes for the production of the optoelectronic semiconductor chip with three-dimensional crystal structures, for example
- FIG. 1 shows a schematic sectional illustration of an optoelectronic semiconductor chip described here
- FIG. 2 shows a schematic sectional illustration of another optoelectronic device described here
- a carrier 2 which is, for example, a
- the active elements 1 are arranged on the carrier 2, the active elements 1 are arranged.
- elements 1 have, for example, the shape of a cylinder.
- the active elements 1 are arranged, for example, at the grid points of a regular grid, in the present example a rectangular grid.
- Each of the active elements 1 comprises a core region 10.
- the core region 10 is formed with an n-doped GaN-based first semiconductor material.
- the core region 10 also has the shape of a cylinder.
- the active layer 11 has the shape of a hollow cylinder, the inner surface is completely with the first
- the active layer 11 consists of a third polar
- the active layer 11 is completely encased by a cover layer 12, which is coated with a p-doped GaN-based second
- the converter material 4 includes, for example
- a second contact layer 6 is arranged on the side facing away from the carrier 2 on the active elements 1 and parallel to the carrier 2. The second contact layer 6 is connected to the core regions 10 of all active elements 1 of
- the second contact layer 6 is formed of a reflective metal such as silver.
- the passivation 3 is located above the side of the active elements 1 and the converter material 4 facing away from the carrier 2.
- FIG. 2 shows an optoelectronic semiconductor chip with a carrier 2, which is designed to be radiation-reflecting, for example.
- the active elements 1 are arranged. The active elements 1 are present
- the shape of a cylinder with hexagonal base For example, the shape of a cylinder with hexagonal base.
- the active elements 1 are arranged, for example, at the grid points of a regular grid, in the present example a triangular grid.
- Each of the active elements 1 comprises a core region 10.
- the core region 10 is formed with an n-doped GaN-based first semiconductor material.
- the core region 10 also has the shape of a cylinder.
- the active layer 11 has the shape of a hollow cylinder, the inner surface is completely with the first
- the active layer 11 consists of a third polar
- the active layer 11 is completely encased by a cover layer 12, which is coated with a p-doped GaN-based second
- Semiconductor material is formed.
- the cover layer 12 is completely covered with a first contact layer 13.
- the first contact layer 13 is in operation for those generated in the active layer 11
- the spaces between the active elements 1 are provided with an electrically nonconductive converter material 4
- the converter material 4 comprises, for example, a light-emitting polymer with one in blue
- a second contact layer 6 is arranged on the side facing away from the carrier 2 on the active elements 1 and parallel to the carrier 2. The second contact layer 6 is connected to the core regions 10 of all active elements 1 of
- the second contact layer 6 is for the primary radiation generated in operation in the active elements 1 and by the
- the second contact layer 6 is formed of ITO.
- passivation 3 are the active layer, the
- the passivation 3 is then located on the side facing away from the carrier 2 of the active elements. 1
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Abstract
Description
Claims
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KR1020157021480A KR20150107788A (ko) | 2013-01-11 | 2013-12-18 | 광전 반도체 칩 |
CN201380070007.4A CN104919607B (zh) | 2013-01-11 | 2013-12-18 | 光电子半导体芯片 |
US14/760,177 US9496462B2 (en) | 2013-01-11 | 2013-12-18 | Optoelectronic semiconductor chip |
JP2015552022A JP6207629B2 (ja) | 2013-01-11 | 2013-12-18 | オプトエレクトロニクス半導体チップ |
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DE102013100291.9A DE102013100291B4 (de) | 2013-01-11 | 2013-01-11 | Optoelektronischer Halbleiterchip |
DE102013100291.9 | 2013-01-11 |
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US (1) | US9496462B2 (de) |
JP (1) | JP6207629B2 (de) |
KR (1) | KR20150107788A (de) |
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WO2018138213A1 (de) * | 2017-01-30 | 2018-08-02 | Osram Opto Semiconductors Gmbh | Strahlungsemittierende vorrichtung |
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DE102013114466A1 (de) | 2013-12-19 | 2015-06-25 | Osram Gmbh | Optoelektronisches Halbleiterbauteil und Verfahren zur Herstellung eines optoelektronischen Halbleiterbauteils |
DE102014117995A1 (de) | 2014-12-05 | 2016-06-09 | Osram Opto Semiconductors Gmbh | Halbleiterschichtenfolge zur Erzeugung von sichtbarem Licht und Leuchtdiode |
US12051685B2 (en) * | 2020-02-06 | 2024-07-30 | Lumileds, LLC | Light-emitting device with metal inlay and bottom contacts |
US11575074B2 (en) | 2020-07-21 | 2023-02-07 | Lumileds Llc | Light-emitting device with metal inlay and top contacts |
KR20230169767A (ko) * | 2022-06-09 | 2023-12-18 | 삼성에스디아이 주식회사 | 디스플레이 장치 |
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WO2012054477A2 (en) * | 2010-10-18 | 2012-04-26 | Wake Forest University | Optoelectronic devices and applications thereof |
DE102010051286A1 (de) * | 2010-11-12 | 2012-05-16 | Osram Opto Semiconductors Gmbh | Optoelektronischer Halbleiterchip und Verfahren zu dessen Herstellung |
US20120132888A1 (en) * | 2010-11-26 | 2012-05-31 | Seoul Opto Device Co., Ltd. | Light emitting device and method of fabricating the same |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
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WO2018138213A1 (de) * | 2017-01-30 | 2018-08-02 | Osram Opto Semiconductors Gmbh | Strahlungsemittierende vorrichtung |
US11316077B2 (en) | 2017-01-30 | 2022-04-26 | Osram Oled Gmbh | Radiation-emitting device |
Also Published As
Publication number | Publication date |
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US20150349215A1 (en) | 2015-12-03 |
JP2016510502A (ja) | 2016-04-07 |
CN104919607A (zh) | 2015-09-16 |
JP6207629B2 (ja) | 2017-10-04 |
US9496462B2 (en) | 2016-11-15 |
DE102013100291A1 (de) | 2014-07-17 |
KR20150107788A (ko) | 2015-09-23 |
CN104919607B (zh) | 2017-08-08 |
DE102013100291B4 (de) | 2021-08-05 |
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