JP6505208B2 - ひずみ改質された表面活性領域を有するiii族窒化物ナノワイヤledおよびその製造方法 - Google Patents
ひずみ改質された表面活性領域を有するiii族窒化物ナノワイヤledおよびその製造方法 Download PDFInfo
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- 239000002070 nanowire Substances 0.000 title claims description 127
- 238000004519 manufacturing process Methods 0.000 title claims description 10
- 150000004767 nitrides Chemical class 0.000 title claims description 7
- 229910052738 indium Inorganic materials 0.000 claims description 103
- APFVFJFRJDLVQX-UHFFFAOYSA-N indium atom Chemical compound [In] APFVFJFRJDLVQX-UHFFFAOYSA-N 0.000 claims description 101
- 239000004065 semiconductor Substances 0.000 claims description 49
- 239000000758 substrate Substances 0.000 claims description 18
- 238000000034 method Methods 0.000 claims description 17
- 229910002704 AlGaN Inorganic materials 0.000 claims description 13
- 230000015572 biosynthetic process Effects 0.000 claims description 10
- 230000002950 deficient Effects 0.000 claims description 5
- 230000004888 barrier function Effects 0.000 claims description 4
- 238000011065 in-situ storage Methods 0.000 claims description 2
- 230000007812 deficiency Effects 0.000 claims 1
- 238000010348 incorporation Methods 0.000 claims 1
- 239000010410 layer Substances 0.000 description 31
- 239000000463 material Substances 0.000 description 16
- 230000007547 defect Effects 0.000 description 7
- 239000000203 mixture Substances 0.000 description 7
- 238000002488 metal-organic chemical vapour deposition Methods 0.000 description 6
- 229910001218 Gallium arsenide Inorganic materials 0.000 description 5
- 238000001228 spectrum Methods 0.000 description 5
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 4
- 238000000635 electron micrograph Methods 0.000 description 4
- 239000002096 quantum dot Substances 0.000 description 4
- 230000005855 radiation Effects 0.000 description 4
- 230000003595 spectral effect Effects 0.000 description 4
- XCZXGTMEAKBVPV-UHFFFAOYSA-N trimethylgallium Chemical compound C[Ga](C)C XCZXGTMEAKBVPV-UHFFFAOYSA-N 0.000 description 4
- 229910052782 aluminium Inorganic materials 0.000 description 3
- 239000011258 core-shell material Substances 0.000 description 3
- 238000000151 deposition Methods 0.000 description 3
- 230000008021 deposition Effects 0.000 description 3
- 230000000873 masking effect Effects 0.000 description 3
- 239000002086 nanomaterial Substances 0.000 description 3
- 239000002105 nanoparticle Substances 0.000 description 3
- 230000007704 transition Effects 0.000 description 3
- 229910000673 Indium arsenide Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 229910021529 ammonia Inorganic materials 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 239000002019 doping agent Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000000609 electron-beam lithography Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- -1 for example Chemical compound 0.000 description 2
- WPYVAWXEWQSOGY-UHFFFAOYSA-N indium antimonide Chemical compound [Sb]#[In] WPYVAWXEWQSOGY-UHFFFAOYSA-N 0.000 description 2
- RPQDHPTXJYYUPQ-UHFFFAOYSA-N indium arsenide Chemical compound [In]#[As] RPQDHPTXJYYUPQ-UHFFFAOYSA-N 0.000 description 2
- 238000001020 plasma etching Methods 0.000 description 2
- 239000002243 precursor Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 229910052710 silicon Inorganic materials 0.000 description 2
- 230000007847 structural defect Effects 0.000 description 2
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 1
- 229910004613 CdTe Inorganic materials 0.000 description 1
- 229910005542 GaSb Inorganic materials 0.000 description 1
- 229910000530 Gallium indium arsenide Inorganic materials 0.000 description 1
- 229910052581 Si3N4 Inorganic materials 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 229910052790 beryllium Inorganic materials 0.000 description 1
- 229910052793 cadmium Inorganic materials 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000001194 electroluminescence spectrum Methods 0.000 description 1
- 230000005669 field effect Effects 0.000 description 1
- 229910052733 gallium Inorganic materials 0.000 description 1
- 229910052732 germanium Inorganic materials 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000001459 lithography Methods 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 229910003465 moissanite Inorganic materials 0.000 description 1
- 239000002073 nanorod Substances 0.000 description 1
- 239000002071 nanotube Substances 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000005693 optoelectronics Effects 0.000 description 1
- 238000000206 photolithography Methods 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
- 239000000376 reactant Substances 0.000 description 1
- 230000006798 recombination Effects 0.000 description 1
- 238000005215 recombination Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 229910052711 selenium Inorganic materials 0.000 description 1
- SBIBMFFZSBJNJF-UHFFFAOYSA-N selenium;zinc Chemical compound [Se]=[Zn] SBIBMFFZSBJNJF-UHFFFAOYSA-N 0.000 description 1
- 238000001338 self-assembly Methods 0.000 description 1
- 229910010271 silicon carbide Inorganic materials 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 229910052714 tellurium Inorganic materials 0.000 description 1
- 230000002277 temperature effect Effects 0.000 description 1
- 229910052718 tin Inorganic materials 0.000 description 1
- 238000003631 wet chemical etching Methods 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
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Description
図9Aに示されるように、ひさし領域31の厚さt1は約13nmであり、一方、シェル4のm面部34の厚さは約10nmである。ひさし領域31は約10原子パーセントのインジウムを含み、一方、m面部34は約3原子パーセントのインジウムを含む。
Claims (20)
- 傾斜したp面の側壁を有する上端部および実質的に垂直なm面の側壁を有する下部を有するIII族窒化物半導体ナノワイヤコアと、
前記半導体ナノワイヤコアの周囲に半径方向に配されたインジウム含有III族窒化物半導体第1のシェルと、を含むナノワイヤデバイスであって、
前記第1のシェルは、前記半導体ナノワイヤコアの前記上端部の上に配された傾斜したp面の側壁を有する上端部と、前記半導体ナノワイヤコアの前記下部の上に配された実質的に垂直なm面の側壁を有する下部と、を含み、
前記第1のシェルは、さらに、前記第1のシェルの前記上端部の前記p面から前記第1のシェルの前記下部の前記m面までの構造的な不連続性を含むひさし領域を含み、
前記ひさし領域は、前記傾斜したp面の側壁を有する第1のシェルの上端部、および、前記実質的に垂直なm面の側壁を有する前記第1のシェルの前記下部よりも、少なくとも5原子パーセント高いインジウム含有量を有することを特徴とするナノワイヤデバイス。 - 前記ナノワイヤデバイスが、発光ダイオード(LED)デバイスを含み、前記第1のシェルが、活性領域量子井戸シェルを含むことを特徴とする請求項1に記載のナノワイヤデバイス。
- 前記第1のシェルの前記上端部は、前記半導体ナノワイヤコアの前記上端部の全周を取り囲むリング形状領域を含み、
前記第1のシェルの前記下部は、前記半導体ナノワイヤコアの前記下部の全周を取り囲むリング形状領域を含み、
前記ひさし領域は、前記半導体ナノワイヤコアの前記上端部と前記下部との間の、前記半導体ナノワイヤコアの中央部の全周を取り囲むリング形状領域を含む
ことを特徴とする請求項2に記載のナノワイヤデバイス。 - 前記活性領域量子井戸シェルが、In(Al)GaN半導体量子井戸シェルを含むことを特徴とする請求項3に記載のナノワイヤデバイス。
- 前記ひさし領域が、10原子パーセントよりも多いインジウムを含み、第1のシェルの前記上端部および前記第1のシェルの前記下部が、10原子パーセントよりも少ないインジウムを含むことを特徴とする請求項4に記載のナノワイヤデバイス。
- 前記ひさし領域が、15〜30原子パーセントのインジウムを含み、第1のシェルの前記上端部および前記第1のシェルの前記下部が、15原子パーセントまたは15原子パーセントよりも少ないインジウムを含むことを特徴とする請求項5に記載のナノワイヤデバイス。
- 前記LEDが、495から590nmのピーク放射波長、または、591から650nmのピーク放射波長を有し、光は前記ひさし領域から支配的に放射されることを特徴とする請求項5に記載のナノワイヤデバイス。
- 前記LEDが、約520nmのピーク放射波長を有し、前記ひさし領域が、約20原子パーセントのインジウムを含むことを特徴とする請求項7に記載のナノワイヤデバイス。
- 前記LEDが、約610nmのピーク放射波長を有し、前記ひさし領域が、約30原子パーセントのインジウムを含むことを特徴とする請求項7に記載のナノワイヤデバイス。
- 前記第1のシェルの前記下部が、少なくとも3つのピークを有する不均一な表面の輪郭を有し、
前記少なくとも3つのピークのそれぞれが、前記少なくとも3つのピークの隣接するピークから谷によって分離され、
前記少なくとも3つのピークのそれぞれが、隣接する谷から半径方向に少なくとも2nm延在することを特徴とする請求項2に記載のナノワイヤデバイス。 - 前記半導体ナノワイヤコアと前記第1のシェルとの間に半径方向に配された半導体第2のシェルをさらに含み、
前記第2のシェルが、前記活性領域量子井戸シェルの下地層バリアシェル、または、前記活性領域量子井戸シェルから半径方向に内側に配された下地層シェルを含むことを特徴とする請求項10に記載のナノワイヤデバイス。 - 前記第2のシェルが、少なくとも3つのピークを有する不均一な表面の輪郭を有し、
前記少なくとも3つのピークのそれぞれが、前記少なくとも3つのピークの隣接するピークから谷によって分離され、
前記少なくとも3つのピークのそれぞれが、隣接する谷から半径方向に少なくとも2nm延在することを特徴とする請求項11に記載のナノワイヤデバイス。 - 支持体の半導体表面の上に配された絶縁マスク層をさらに含み、
前記半導体ナノワイヤコアは、前記絶縁マスク層の開口部を介して前記支持体の前記半導体表面から実質的に直交し延在する第1の導電型の半導体ナノワイヤコアと、
前記活性領域量子井戸シェルの上および周囲に延在する、少なくとも1つの第2の導電型の半導体シェルと、
前記第2の導電型の半導体シェルと接触する第1の電極層と、
前記半導体ナノワイヤコアと電気的に接続される第2の電極層と、
を含むことを特徴とする請求項2に記載のナノワイヤデバイス。 - 前記第1の導電型が、n型を含み、
前記第2の導電型が、p型を含み、
前記支持体が、基板の上のn−GaNまたはn−AlGaNの、n型半導体バッファ層を含み、
前記半導体ナノワイヤコアが、n−GaNナノワイヤコアを含み、
前記活性領域量子井戸シェルが、GaNバリアシェルの間のInGaNシェルを含み、
前記第1の電極層が、透明導電性酸化物(TCO)を含む
ことを特徴とする請求項13に記載のナノワイヤデバイス。 - 発光ダイオード(LED)デバイスを製造する方法であって、
傾斜したp面の側壁を有する上端部および実質的に垂直なm面の側壁を有する下部を有する半導体ナノワイヤコアを形成する工程と、
前記半導体ナノワイヤコアの周囲に半径方向に第1のシェルであって、In(Al)GaN活性領域量子井戸を含む前記第1のシェルを形成する工程と、を含み、
前記第1のシェルは、前記半導体ナノワイヤコアの上端部の上に配された傾斜したp面の側壁を有する上端部と、前記半導体ナノワイヤコアの下部の上に配された実質的に垂直なm面の側壁を有する下部と、を含み、
前記第1のシェルは、さらに、前記第1のシェルの前記上端部の前記p面から前記第1のシェルの前記下部の前記m面までの構造的な不連続性を含むひさし領域を含み、
前記ひさし領域は、前記傾斜したp面の側壁を有する第1のシェルの上端部、および、前記実質的に垂直なm面の側壁を有する前記第1のシェルの前記下部よりも、少なくとも5原子パーセント高いインジウム含有量を有し、光は前記ひさし領域から支配的に放射されることを特徴とする方法。 - 前記第1のシェルを形成する前に、前記半導体ナノワイヤコアの周囲に半径方向に第2の半導体シェルを形成する工程をさらに含むことを特徴とする請求項15に記載の方法。
- 前記構造的な不連続性が、In−N結合が緩み、実質的に垂直なm面の側壁を有する前記第1のシェルの前記下部よりも高い確率でインジウムを取り込むための低エネルギ表面を生成することを特徴とする請求項15に記載の方法。
- 発光ダイオード(LED)デバイスを製造する方法であって、
傾斜したp面の側壁を有する上端部および実質的に垂直なm面の側壁を有する下部を有する半導体ナノワイヤコアを形成する工程と、
前記半導体ナノワイヤコアの周囲に半径方向に第1のシェルであって、前記第1のシェルの形成中にその場で一体的に形成されるインジウムリッチひさし領域を有するIn(Al)GaN活性領域量子井戸を含む前記第1のシェルを形成する工程と、を含み、
インジウムリッチひさし領域が、前記第1のシェルのインジウム不足部よりも少なくとも5原子パーセント高いインジウムの含有量を有することを特徴とする方法。 - 前記第1のシェルの前記インジウム不足部が、前記半導体ナノワイヤコアの上端部の上に配された傾斜したp面の側壁を有する上端部と、前記半導体ナノワイヤコアの下部の上に配された実質的に垂直なm面の側壁を有する下部と、を含むことを特徴とする請求項18に記載の方法。
- 前記ひさし領域が、前記第1のシェルの前記上端部の前記p面から前記第1のシェルの前記下部の前記m面までの構造的な不連続性を含み、
前記構造的な不連続性は、In−N結合が緩み、実質的に垂直なm面の側壁を有する前記第1のシェルの前記下部よりも高い確率でインジウムを取り込むための低エネルギ表面を生成することを特徴とする請求項19に記載の方法。
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