JP5296290B2 - 漸変組成の発光層を有する半導体発光装置 - Google Patents
漸変組成の発光層を有する半導体発光装置 Download PDFInfo
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- 239000000203 mixture Substances 0.000 title claims description 88
- 239000004065 semiconductor Substances 0.000 title claims description 17
- 229910052738 indium Inorganic materials 0.000 claims description 92
- APFVFJFRJDLVQX-UHFFFAOYSA-N indium atom Chemical group [In] APFVFJFRJDLVQX-UHFFFAOYSA-N 0.000 claims description 88
- 230000004888 barrier function Effects 0.000 claims description 53
- 230000008859 change Effects 0.000 claims description 28
- 229910052782 aluminium Inorganic materials 0.000 claims description 21
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical group [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 20
- 150000004767 nitrides Chemical class 0.000 claims description 9
- 239000000758 substrate Substances 0.000 description 38
- 230000010287 polarization Effects 0.000 description 19
- 229910002704 AlGaN Inorganic materials 0.000 description 13
- 239000013078 crystal Substances 0.000 description 13
- 230000007423 decrease Effects 0.000 description 13
- 239000000463 material Substances 0.000 description 13
- 229910045601 alloy Inorganic materials 0.000 description 11
- 239000000956 alloy Substances 0.000 description 11
- 229910052984 zinc sulfide Inorganic materials 0.000 description 9
- 238000005253 cladding Methods 0.000 description 8
- 230000000694 effects Effects 0.000 description 6
- 229910052594 sapphire Inorganic materials 0.000 description 5
- 239000010980 sapphire Substances 0.000 description 5
- 238000000926 separation method Methods 0.000 description 5
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- 239000000969 carrier Substances 0.000 description 4
- 230000005684 electric field Effects 0.000 description 4
- 238000000407 epitaxy Methods 0.000 description 4
- GYHNNYVSQQEPJS-UHFFFAOYSA-N Gallium Chemical compound [Ga] GYHNNYVSQQEPJS-UHFFFAOYSA-N 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 3
- 229910010271 silicon carbide Inorganic materials 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 238000005229 chemical vapour deposition Methods 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 229910052733 gallium Inorganic materials 0.000 description 2
- 230000001965 increasing effect Effects 0.000 description 2
- 230000001939 inductive effect Effects 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000001451 molecular beam epitaxy Methods 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 230000006798 recombination Effects 0.000 description 2
- 238000005215 recombination Methods 0.000 description 2
- 238000001330 spinodal decomposition reaction Methods 0.000 description 2
- 229910001218 Gallium arsenide Inorganic materials 0.000 description 1
- 229910020068 MgAl Inorganic materials 0.000 description 1
- 229910002056 binary alloy Inorganic materials 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 239000010432 diamond Substances 0.000 description 1
- 239000002019 doping agent Substances 0.000 description 1
- 230000005669 field effect Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000010348 incorporation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910003465 moissanite Inorganic materials 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- 239000004038 photonic crystal Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000013139 quantization Methods 0.000 description 1
- 229910002059 quaternary alloy Inorganic materials 0.000 description 1
- 239000011029 spinel Substances 0.000 description 1
- 229910052596 spinel Inorganic materials 0.000 description 1
- 230000002269 spontaneous effect Effects 0.000 description 1
- 229910002058 ternary alloy Inorganic materials 0.000 description 1
- 239000012808 vapor phase Substances 0.000 description 1
- 238000001429 visible spectrum Methods 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
- H01L33/02—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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B82—NANOTECHNOLOGY
- B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
- B82Y20/00—Nanooptics, e.g. quantum optics or photonic crystals
-
- 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
- H01L33/04—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 quantum effect structure or superlattice, e.g. tunnel junction
- H01L33/06—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 quantum effect structure or superlattice, e.g. tunnel junction within the light emitting region, e.g. quantum confinement structure or tunnel barrier
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S5/00—Semiconductor lasers
- H01S5/30—Structure or shape of the active region; Materials used for the active region
- H01S5/32—Structure or shape of the active region; Materials used for the active region comprising PN junctions, e.g. hetero- or double- heterostructures
- H01S5/3205—Structure or shape of the active region; Materials used for the active region comprising PN junctions, e.g. hetero- or double- heterostructures with an active layer having a graded composition in the growth direction
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S5/00—Semiconductor lasers
- H01S5/30—Structure or shape of the active region; Materials used for the active region
- H01S5/34—Structure or shape of the active region; Materials used for the active region comprising quantum well or superlattice structures, e.g. single quantum well [SQW] lasers, multiple quantum well [MQW] lasers or graded index separate confinement heterostructure [GRINSCH] lasers
- H01S5/343—Structure or shape of the active region; Materials used for the active region comprising quantum well or superlattice structures, e.g. single quantum well [SQW] lasers, multiple quantum well [MQW] lasers or graded index separate confinement heterostructure [GRINSCH] lasers in AIIIBV compounds, e.g. AlGaAs-laser, InP-based laser
- H01S5/34333—Structure or shape of the active region; Materials used for the active region comprising quantum well or superlattice structures, e.g. single quantum well [SQW] lasers, multiple quantum well [MQW] lasers or graded index separate confinement heterostructure [GRINSCH] lasers in AIIIBV compounds, e.g. AlGaAs-laser, InP-based laser with a well layer based on Ga(In)N or Ga(In)P, e.g. blue laser
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- Engineering & Computer Science (AREA)
- Nanotechnology (AREA)
- Chemical & Material Sciences (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- Life Sciences & Earth Sciences (AREA)
- Biophysics (AREA)
- Optics & Photonics (AREA)
- Computer Hardware Design (AREA)
- Crystallography & Structural Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Led Devices (AREA)
- Semiconductor Lasers (AREA)
Description
III族窒化物装置内の結晶層は、多くの場合、サファイアのような格子不整合基板上に歪みウルツ鉱結晶として成長する。このような結晶は、2種類の偏光、つまり、結晶対称性から生じる自然偏光及び歪みから生じる圧電偏光を示す。層内の全偏光は、自然偏光と圧電偏光の合計である。
図2を参照すると、一実施形態では、InxAlyGa1-x-yNベースのLEDは、バッファ層20上に配置された多層エピタキシ構造18を含み、バッファ層20は、サファイア、SiC、又はいずれかの他の適切な基板のような基板22上に配置される。エピタキシ構造18は、p型InxAlyGa1-x-yN領域26及びInxAlyGa1-x-yN領域28の間に配置された活性領域24を含む。InxAlyGa1-x-yN領域28は、n型及び/又は未ドープInxAlyGa1-x-yN層を含む。活性領域24は、InxAlyGa1-x-yNから形成された1以上の量子井戸層及び1以上の障壁層を含む。p接点30は、InxAlyGa1-x-yN領域26に電気的に結合される。n接点34は、InxAlyGa1-x-yN領域28に電気的に結合される。接点30及び34間に適切な順方向バイアスを印加すると、その結果、活性領域24から光が放射される。
上述の例における漸変領域の中間点つまり平均インジウム組成は、上述の例よりも波長が長い装置に対しては数値の大きい方のインジウム組成に、又は、上述の例よりも波長が短い装置に対しては数値の小さい方のインジウム組成にずらすことができる。
本発明の実施形態による発光装置内の様々なInxAlyGa1-x-yN層は、例えば、有機金属化学気相成長法(MOCVD)又は分子線エピタキシ(MBE)によって形成することができる。漸変組成量子井戸及び障壁は、例えば、層堆積中に試薬ガスの流量を変えることによって形成することができる。
20 バッファ層
22 基板
24 活性領域
30 p接点
34 n接点
Claims (20)
- n型領域とp型領域の間に配置されたIII族窒化物の発光層を含み、前記発光層は、第1の元素の漸変する組成を有する1つ以上の量子井戸層を有し、
前記量子井戸層内の前記第1の元素の組成の変化は、該量子井戸層の厚みに亘って0.2%/オングストロームよりも大きく、かつ0.8%/オングストロームよりも小さい、
ことを特徴とする半導体発光装置。 - 前記量子井戸層内の前記第1の元素の組成の変化は、該量子井戸層の厚みに亘って少なくとも0.4%/オングストロームであることを特徴とする請求項1に記載の装置。
- 前記量子井戸層は、InxGa1-xNであり、前記第1の元素は、インジウムであることを特徴とする請求項1に記載の装置。
- 前記量子井戸層内の前記第1の元素の組成の変化は、該量子井戸層の厚みに亘って少なくとも0.6%/オングストロームであることを特徴とする請求項1に記載の装置。
- 前記量子井戸層は、10オングストロームと100オングストロームの間の厚みを有することを特徴とする請求項1に記載の装置。
- 前記量子井戸層は、100オングストロームと500オングストロームの間の厚みを有することを特徴とする請求項1に記載の装置。
- 前記量子井戸層は、InxAlyGa1-x-yNであることを特徴とする請求項1に記載の装置。
- 前記第1の元素は、アルミニウムであることを特徴とする請求項7に記載の装置。
- 前記第1の元素は、インジウムであることを特徴とする請求項7に記載の装置。
- 前記量子井戸層内のアルミニウムの組成は、段階的に変えられることを特徴とする請求項9に記載の装置。
- 前記量子井戸層は、第1の量子井戸であり、
第2の量子井戸と、
前記第1の量子井戸と前記第2の量子井戸との間に配置された障壁層と、
を更に含むことを特徴とする請求項1に記載の装置。 - 前記障壁層内の組成は、段階的に変えられることを特徴とする請求項11に記載の装置。
- 前記障壁層は、漸変する組成を有する第1の部分と実質的に均一な組成を有する第2の部分とを含むことを特徴とする請求項11に記載の装置。
- 前記第1の部分は、前記第1及び第2の量子井戸の一方に隣接して位置することを特徴とする請求項13に記載の装置。
- 前記量子井戸層は、AlxGa1-xNであり、前記第1の元素は、アルミニウムであることを特徴とする請求項1に記載の装置。
- 前記量子井戸層は、III族窒化物発光領域の第1の部分であり、該発光領域は、均一組成の第2の部分を更に含むことを特徴とする請求項1に記載の装置。
- 前記第1の部分は、10と100オングストロームの間の厚みを有することを特徴とする請求項16に記載の装置。
- 前記第1の部分は、前記発光領域の、前記n型領域に最も近い端部に位置することを特徴とする請求項16に記載の装置。
- 前記第1の部分は、前記発光領域の、前記p型領域に最も近い端部に位置することを特徴とする請求項16に記載の装置。
- 前記発光領域は、第1の元素の漸変する組成を有する第3の部分を更に含み、
前記第2の部分は、前記第1及び第3の部分の間に配置される、
ことを特徴とする請求項16に記載の装置。
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/977867 | 2004-10-29 | ||
US10/977,867 US7122839B2 (en) | 2004-10-29 | 2004-10-29 | Semiconductor light emitting devices with graded composition light emitting layers |
Publications (2)
Publication Number | Publication Date |
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JP2006352060A JP2006352060A (ja) | 2006-12-28 |
JP5296290B2 true JP5296290B2 (ja) | 2013-09-25 |
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JP2005342797A Active JP5296290B2 (ja) | 2004-10-29 | 2005-10-28 | 漸変組成の発光層を有する半導体発光装置 |
Country Status (4)
Country | Link |
---|---|
US (1) | US7122839B2 (ja) |
EP (1) | EP1653522B1 (ja) |
JP (1) | JP5296290B2 (ja) |
TW (1) | TWI371117B (ja) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US11444222B2 (en) | 2017-09-12 | 2022-09-13 | Nikkiso Co., Ltd. | Nitride semiconductor light-emitting element and production method for nitride semiconductor light-emitting element |
Families Citing this family (24)
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US6955933B2 (en) * | 2001-07-24 | 2005-10-18 | Lumileds Lighting U.S., Llc | Light emitting diodes with graded composition active regions |
KR100661709B1 (ko) | 2004-12-23 | 2006-12-26 | 엘지이노텍 주식회사 | 질화물 반도체 발광소자 및 그 제조방법 |
US7425732B2 (en) * | 2005-04-27 | 2008-09-16 | Matsushita Electric Industrial Co., Ltd. | Nitride semiconductor device |
US20070045638A1 (en) * | 2005-08-24 | 2007-03-01 | Lumileds Lighting U.S., Llc | III-nitride light emitting device with double heterostructure light emitting region |
US7772604B2 (en) | 2006-01-05 | 2010-08-10 | Illumitex | Separate optical device for directing light from an LED |
CN100547819C (zh) * | 2006-08-15 | 2009-10-07 | 中国科学院物理研究所 | 低极化效应的氮化镓基发光二极管芯片用外延材料及制法 |
US7789531B2 (en) | 2006-10-02 | 2010-09-07 | Illumitex, Inc. | LED system and method |
KR20090002241A (ko) * | 2007-06-25 | 2009-01-09 | 엘지이노텍 주식회사 | 발광소자 및 그 제조방법 |
US7829358B2 (en) | 2008-02-08 | 2010-11-09 | Illumitex, Inc. | System and method for emitter layer shaping |
TW201034256A (en) | 2008-12-11 | 2010-09-16 | Illumitex Inc | Systems and methods for packaging light-emitting diode devices |
JP5777196B2 (ja) * | 2009-04-22 | 2015-09-09 | パナソニック株式会社 | 窒化物半導体発光素子の製造方法 |
US8449128B2 (en) | 2009-08-20 | 2013-05-28 | Illumitex, Inc. | System and method for a lens and phosphor layer |
US8585253B2 (en) | 2009-08-20 | 2013-11-19 | Illumitex, Inc. | System and method for color mixing lens array |
US8525148B2 (en) * | 2010-07-16 | 2013-09-03 | Micron Technology, Inc. | Solid state lighting devices without converter materials and associated methods of manufacturing |
CN102157657B (zh) * | 2011-01-26 | 2012-10-17 | 中山大学 | 一种GaN基发光二极管以及制作方法 |
US9029830B2 (en) | 2012-05-07 | 2015-05-12 | Sharp Kabushiki Kaisha | Multi-quantum well LED structure with varied barrier layer composition |
US8704251B1 (en) | 2013-03-01 | 2014-04-22 | Epistar Corporation | Light-emitting device |
KR20140146887A (ko) * | 2013-06-18 | 2014-12-29 | 엘지이노텍 주식회사 | 발광소자 |
CN103325903A (zh) * | 2013-06-19 | 2013-09-25 | 中国科学院半导体研究所 | 可调控能带的uv led多量子阱结构装置及生长方法 |
CN103296165B (zh) * | 2013-06-19 | 2016-08-10 | 中国科学院半导体研究所 | 一种可调控能带的led量子阱结构 |
KR102098295B1 (ko) | 2013-07-29 | 2020-04-07 | 엘지이노텍 주식회사 | 발광소자 및 조명시스템 |
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WO2019111153A1 (en) * | 2017-12-05 | 2019-06-13 | King Abdullah University Of Science And Technology | Methods for forming graded wurtzite iii-nitride alloy layers |
CN116387425B (zh) * | 2023-05-26 | 2023-08-11 | 中诚华隆计算机技术有限公司 | 一种多量子阱led外延结构、led芯片及其制备方法 |
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US6515313B1 (en) * | 1999-12-02 | 2003-02-04 | Cree Lighting Company | High efficiency light emitters with reduced polarization-induced charges |
US6955933B2 (en) * | 2001-07-24 | 2005-10-18 | Lumileds Lighting U.S., Llc | Light emitting diodes with graded composition active regions |
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- 2004-10-29 US US10/977,867 patent/US7122839B2/en active Active
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- 2005-10-21 EP EP05109826.7A patent/EP1653522B1/en active Active
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US11444222B2 (en) | 2017-09-12 | 2022-09-13 | Nikkiso Co., Ltd. | Nitride semiconductor light-emitting element and production method for nitride semiconductor light-emitting element |
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US7122839B2 (en) | 2006-10-17 |
EP1653522A2 (en) | 2006-05-03 |
JP2006352060A (ja) | 2006-12-28 |
US20060091404A1 (en) | 2006-05-04 |
EP1653522A3 (en) | 2011-03-16 |
TW200620715A (en) | 2006-06-16 |
EP1653522B1 (en) | 2016-12-28 |
TWI371117B (en) | 2012-08-21 |
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