DE102011051145A1 - White LED for use as backlight source for LCD, has negative electrode formed on exposed portion of n-type gallium nitride layer and electrically connected to negative terminal of power source - Google Patents
White LED for use as backlight source for LCD, has negative electrode formed on exposed portion of n-type gallium nitride layer and electrically connected to negative terminal of power source Download PDFInfo
- Publication number
- DE102011051145A1 DE102011051145A1 DE102011051145A DE102011051145A DE102011051145A1 DE 102011051145 A1 DE102011051145 A1 DE 102011051145A1 DE 102011051145 A DE102011051145 A DE 102011051145A DE 102011051145 A DE102011051145 A DE 102011051145A DE 102011051145 A1 DE102011051145 A1 DE 102011051145A1
- Authority
- DE
- Germany
- Prior art keywords
- layer
- gallium nitride
- type gallium
- transparent conductive
- terbium
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L33/00—Semiconductor devices with at least one potential-jump barrier or surface barrier 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 with at least one potential-jump barrier or surface barrier 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
Abstract
Description
Die vorliegende Erfindung betrifft allgemein eine lichtemittierende Diode und insbesondere eine GaN-basierte weißes Licht emittierende Diode (LED), die eine transparente leitfähige Terbium-dotierte Indiumoxid-Schicht (In2O3:Tb) mit Photolumineszenz-Eigenschaften aufweist.The present invention generally relates to a light-emitting diode, and more particularly, to a GaN-based white light emitting diode (LED) having a transparent terbium-doped indium oxide (In 2 O 3 : Tb) conductive layer having photoluminescent characteristics.
Lichtemittierende Dioden (LEDs) für die Nutzung bei speziellen und allgemeinen Beleuchtungsanwendungen entwickeln sich kontinuierlich immer weiter. Bei einer LED können die Elektronen und Löcher benachbart zu einem p-n-Übergang rekombinieren, so dass Licht emittiert wird, wenn ein Vorwärts-Vorspannungsstrom fließt. Da die Wellenlänge des emittierten Lichtes und somit seine Farbe von den Energielücken der Materialien abhängen, kann das gewünschte sichtbare Licht durch Veränderungen der Energielücke zwischen verschiedenen Halbleitermaterialien, die den p-n-Übergang bilden, emittiert werden.Light emitting diodes (LEDs) for use in special and general lighting applications are constantly evolving. For an LED, the electrons and holes may recombine adjacent to a p-n junction, so that light is emitted when a forward bias current flows. Since the wavelength of the emitted light, and thus its color, depends on the energy gaps of the materials, the desired visible light can be emitted by changing the energy gap between different semiconductor materials forming the p-n junction.
UV-Licht aus einer LED-Lichtquelle kann mittels Phosphor, der einem transparenten Harz beigefügt ist, in sichtbares Licht umgewandelt werden. Transparentes Harz bringt jedoch den Nachteil mit sich, dass es altert, wodurch sich die optische Qualität des von der LED emittierten Lichtes verschlechtert. Aus diesem Grund besteht ein Bedarf daran, eine weißes Licht emittierende Diode bereitzustellen, die eine photolumineszente Schicht aufweist, um die optische Qualität des von einer LED emittieren Lichtes zu verbessern, wenn diese über einen langen Zeitraum verwendet wird.UV light from an LED light source can be converted to visible light using phosphorus attached to a transparent resin. However, transparent resin has the disadvantage that it ages, which deteriorates the optical quality of the light emitted from the LED. For this reason, there is a need to provide a white light-emitting diode having a photoluminescent layer to improve the optical quality of the light emitted from an LED when used for a long period of time.
Dementsprechend ist es Ziel der vorliegenden Erfindung, eine weiße LED bereitzustellen, die eine photolumineszente Schicht aufweist, um die oben dargelegten Probleme des Standes der Technik zu beseitigen.Accordingly, it is an object of the present invention to provide a white LED having a photoluminescent layer to overcome the above-described problems of the prior art.
Um das obengenannte Ziel zu erreichen, stellt die vorliegende Erfindung gemäß einer Ausführungsform der Erfindung eine eine photolumineszente Schicht aufweisende weiße LED bereit, die aufweist: ein Saphirsubstrat, eine Galliumnitrid-Pufferschicht, eine n-Typ-Galliumnitrid-Schicht, einen Aluminium-Galliumnitrid-Mehrquantentopf, eine p-Typ-Galliumnitrid-Schicht, eine transparente leitfähige Schicht, eine Terbium-dotierte Indiumoxid-Schicht (In2O3:Tb) als photolumineszente Schicht, eine negative Elektrode und eine positive Elektrode, wobei die Galliumnitrid-Pufferschicht, die n-Typ-Galliumnitrid-Schicht, der Aluminium-Galliumnitrid-Mehrquantentopf, die p-Typ-Galliumnitrid-Schicht, die transparente leitfähige Schicht und die Terbium-dotierte Indiumoxid-Schicht aufeinanderfolgend auf dem Saphirsubstrat ausgebildet sind und die negative Elektrode auf einem freiliegenden Abschnitt der n-Typ-Galliumnitrid-Schicht ausgebildet und elektrisch mit dem Minuspol V– der Stromquelle verbunden ist, und die positive Elektrode auf der Terbium-dotierten Indiumoxid-Schicht ausgebildet ist und durch die Terbium-dotierte Indiumoxid-Schicht hindurchverläuft, so dass ermöglicht wird, dass sie die transparente leitfähigen Schicht kontaktiert, wobei die positive Elektrode elektrisch mit dem Pluspol V+ der Stromquelle verbunden ist.In order to achieve the above object, according to one embodiment of the invention, the present invention provides a photoluminescent-type white LED comprising: a sapphire substrate, a gallium nitride buffer layer, an n-type gallium nitride layer, an aluminum gallium nitride A quantum well, a p-type gallium nitride layer, a transparent conductive layer, a terbium-doped indium oxide layer (In 2 O 3 : Tb) as a photoluminescent layer, a negative electrode and a positive electrode, wherein the gallium nitride buffer layer, the n-type gallium nitride layer, the aluminum gallium nitride multi-quantum well, the p-type gallium nitride layer, the transparent conductive layer and the terbium-doped indium oxide layer are sequentially formed on the sapphire substrate and the negative electrode on an exposed portion formed the n-type gallium nitride layer and electrically connected to the negative terminal V of the power source and the positive electrode is formed on the terbium-doped indium oxide layer and passes through the terbium-doped indium oxide layer so as to be allowed to contact the transparent conductive layer, the positive electrode electrically connected to the positive pole V + the power source is connected.
Von der positiven Elektrode fließt elektrischer Strom durch die transparente leitfähige Schicht, die p-Typ-Galliumnitrid-Schicht, den Aluminium-Galliumnitrid-Mehrquantentopf und die n-Typ-Galliumnitrid-Schicht zu der negativen Elektrode. Über Strahlungsrekombination von Elektronen und Löchern in dem Aluminium-Galliumnitrid-Mehrquantentopf wird elektrischer Strom direkt in Licht umgewandelt. Das emittierte Licht durchquert die p-Typ-Galliumnitrid-Schicht, die transparente leitfähige Schicht und die Terbium-dotierte Indiumoxid-Schicht mit den Photolumineszenz-Eigenschaften, in der das Licht in sichtbares weißes Licht umgewandelt wird, wobei das weiße Licht anschließend von der LED nach außen emittiert wird.From the positive electrode, electric current flows through the transparent conductive layer, the p-type gallium nitride layer, the aluminum gallium nitride multi-quantum well, and the n-type gallium nitride layer to the negative electrode. Radiation recombination of electrons and holes in the aluminum gallium nitride multi-quantum well converts electrical current directly into light. The emitted light traverses the p-type gallium nitride layer, the transparent conductive layer, and the terbium-doped indium oxide layer having the photoluminescence properties, in which the light is converted to visible white light, the white light subsequently being emitted from the LED is emitted to the outside.
Somit wird ohne die Verwendung von Phosphor in einem transparenten Harz UV-Licht in weißes Licht umgewandelt, wenn die eine photolumineszente Schicht aufweisende weiße LED gemäß der vorliegenden Erfindung verwendet wird. Dementsprechend können die Probleme des Alterns des bei einer LED verwendeten transparenten Harzes beseitigt werden.Thus, without the use of phosphorus in a transparent resin, UV light is converted into white light when the photoluminescent layer white LED according to the present invention is used. Accordingly, the problems of aging of the transparent resin used in an LED can be eliminated.
Die obigen sowie weitere Ziele, Merkmale, Aspekte und Vorteile der vorliegenden Erfindung werden in der folgenden ausführlichen Beschreibung unter Bezugnahme auf die angehängten Zeichnungen deutlich.The above and other objects, features, aspects and advantages of the present invention will become more apparent in the following detailed description made with reference to the accompanying drawings.
In den Zeichnungen zeigen:In the drawings show:
Aus
Die GaN-Pufferschicht
Der AlGaN-Mehrquantentopf
Von der positiven Elektrode
Die In2O3:Tb-(TIO)-Schicht
Aus
Aus
Der Fachmann auf dem Gebiet wird erkennen, dass zahlreiche Modifizierungen und Variationen der vorliegenden Erfindung möglich sind, ohne dabei den Schutzbereich der vorliegenden Erfindung zu verlassen. Somit soll die vorliegende Erfindung auch derartige Modifizierungen und Variationen der Erfindung beinhalten, sofern sie im Schutzbereich der angehängten Ansprüche enthalten sind.Those skilled in the art will recognize that numerous modifications and variations of the present invention are possible without departing from the scope of the present invention. Thus, the present invention is intended to include such modifications and variations of the invention, insofar as they come within the scope of the appended claims.
Claims (4)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102011051145A DE102011051145A1 (en) | 2011-06-17 | 2011-06-17 | White LED for use as backlight source for LCD, has negative electrode formed on exposed portion of n-type gallium nitride layer and electrically connected to negative terminal of power source |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102011051145A DE102011051145A1 (en) | 2011-06-17 | 2011-06-17 | White LED for use as backlight source for LCD, has negative electrode formed on exposed portion of n-type gallium nitride layer and electrically connected to negative terminal of power source |
Publications (1)
Publication Number | Publication Date |
---|---|
DE102011051145A1 true DE102011051145A1 (en) | 2012-12-20 |
Family
ID=47228170
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE102011051145A Withdrawn DE102011051145A1 (en) | 2011-06-17 | 2011-06-17 | White LED for use as backlight source for LCD, has negative electrode formed on exposed portion of n-type gallium nitride layer and electrically connected to negative terminal of power source |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE102011051145A1 (en) |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20070159067A1 (en) * | 2006-01-09 | 2007-07-12 | Hyo Chul Yun | Light-emitting diode device generating light of multi-wavelengths |
US7259400B1 (en) * | 2001-11-19 | 2007-08-21 | Nanocrystal Lighting Corporation | Nanocomposite photonic structures for solid state lighting |
US20090140272A1 (en) * | 2007-12-03 | 2009-06-04 | Goldeneye, Inc. | Solid-state light source |
-
2011
- 2011-06-17 DE DE102011051145A patent/DE102011051145A1/en not_active Withdrawn
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7259400B1 (en) * | 2001-11-19 | 2007-08-21 | Nanocrystal Lighting Corporation | Nanocomposite photonic structures for solid state lighting |
US20070159067A1 (en) * | 2006-01-09 | 2007-07-12 | Hyo Chul Yun | Light-emitting diode device generating light of multi-wavelengths |
US20090140272A1 (en) * | 2007-12-03 | 2009-06-04 | Goldeneye, Inc. | Solid-state light source |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
DE102008021572B4 (en) | Solid-state lamp and luminaire with it | |
US9219201B1 (en) | Blue light emitting devices that include phosphor-converted blue light emitting diodes | |
KR101580739B1 (en) | Light emitting device | |
DE112015005448B4 (en) | Semiconductor layer sequence for generating visible light and light-emitting diode | |
DE102012106143A1 (en) | Nitride semiconductor light-emitting device | |
DE102012108763B4 (en) | OPTOELECTRONIC SEMICONDUCTOR CHIP AND LIGHT SOURCE WITH THE OPTOELECTRONIC SEMICONDUCTOR CHIP | |
CN105405946B (en) | LED crystal particle and its manufacturing method | |
US20150155460A1 (en) | Light-emitting apparatus | |
JP2002050798A (en) | While led lamp | |
DE102013108782A1 (en) | Light-emitting device, e.g., back light module for LCD, has carrier which is arranged to carry first light-emitting unit in which difference between first dominant wavelength and second dominant wavelength is five to thirty nanometers | |
DE102010031237A1 (en) | Optoelectronic component | |
CN102201510A (en) | Semiconductor device | |
DE102013109781A1 (en) | Light-emitting semiconductor device | |
CN108604622A (en) | Light-emitting component and light-emitting element package including light-emitting component | |
Tao et al. | Hybrid cyan nitride/red phosphors white light-emitting diodes with micro-hole structures | |
WO2016104023A1 (en) | Light-emission device | |
DE102011051145A1 (en) | White LED for use as backlight source for LCD, has negative electrode formed on exposed portion of n-type gallium nitride layer and electrically connected to negative terminal of power source | |
DE102015105693A1 (en) | Radiation-emitting semiconductor component | |
DE102013112498B4 (en) | Lighting devices of light emitting diodes and their operating methods | |
DE102016100723B4 (en) | optoelectronic component | |
Sparavigna | Light-emitting diodes in the solid-state lighting systems | |
Wang | Electrically Injected Hybrid III-Nitride/Organic White LEDs with Non-Radiative Energy | |
CN104157762A (en) | Fluorescent-powder-free white-light LED and fluorescent-powder-free white-light LED light-emitting module | |
WO2020212318A1 (en) | Optoelectronic component having a luminescence conversion layer | |
US20120305887A1 (en) | White light emitting diode having photoluminescent layer |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
R012 | Request for examination validly filed | ||
R083 | Amendment of/additions to inventor(s) | ||
R016 | Response to examination communication | ||
R119 | Application deemed withdrawn, or ip right lapsed, due to non-payment of renewal fee | ||
R119 | Application deemed withdrawn, or ip right lapsed, due to non-payment of renewal fee |
Effective date: 20150101 |