JP2014037626A - 金属酸化物薄膜基板、その製造方法、これを含む光電池及び有機発光素子 - Google Patents
金属酸化物薄膜基板、その製造方法、これを含む光電池及び有機発光素子 Download PDFInfo
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- 239000010409 thin film Substances 0.000 title claims abstract description 216
- 150000004706 metal oxides Chemical class 0.000 title claims abstract description 215
- 229910044991 metal oxide Inorganic materials 0.000 title claims abstract description 214
- 239000000758 substrate Substances 0.000 title claims abstract description 146
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 23
- 238000000605 extraction Methods 0.000 claims abstract description 39
- 238000000034 method Methods 0.000 claims description 19
- XLOMVQKBTHCTTD-UHFFFAOYSA-N zinc oxide Inorganic materials [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 claims description 19
- 238000001505 atmospheric-pressure chemical vapour deposition Methods 0.000 claims description 16
- 229910004298 SiO 2 Inorganic materials 0.000 claims description 11
- 229910006404 SnO 2 Inorganic materials 0.000 claims description 9
- 229910010413 TiO 2 Inorganic materials 0.000 claims description 9
- 229910052782 aluminium Inorganic materials 0.000 claims description 8
- 239000000463 material Substances 0.000 claims description 7
- 239000002019 doping agent Substances 0.000 claims description 6
- 238000011065 in-situ storage Methods 0.000 claims description 6
- 229910052731 fluorine Inorganic materials 0.000 claims description 4
- 229910052733 gallium Inorganic materials 0.000 claims description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical group [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 3
- GNRSAWUEBMWBQH-UHFFFAOYSA-N nickel(II) oxide Inorganic materials [Ni]=O GNRSAWUEBMWBQH-UHFFFAOYSA-N 0.000 claims description 3
- -1 CuAlO 2 Chemical class 0.000 claims 1
- 239000007789 gas Substances 0.000 description 12
- 238000000149 argon plasma sintering Methods 0.000 description 9
- 230000000694 effects Effects 0.000 description 9
- 229910052751 metal Inorganic materials 0.000 description 9
- 239000002184 metal Substances 0.000 description 9
- 239000011787 zinc oxide Substances 0.000 description 8
- 239000010408 film Substances 0.000 description 7
- 239000002243 precursor Substances 0.000 description 7
- 230000005540 biological transmission Effects 0.000 description 6
- 230000003287 optical effect Effects 0.000 description 6
- 238000002347 injection Methods 0.000 description 5
- 239000007924 injection Substances 0.000 description 5
- 239000007800 oxidant agent Substances 0.000 description 5
- 230000001590 oxidative effect Effects 0.000 description 5
- 230000031700 light absorption Effects 0.000 description 4
- 238000004088 simulation Methods 0.000 description 4
- 238000002834 transmittance Methods 0.000 description 4
- 239000006059 cover glass Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
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- MARUHZGHZWCEQU-UHFFFAOYSA-N 5-phenyl-2h-tetrazole Chemical compound C1=CC=CC=C1C1=NNN=N1 MARUHZGHZWCEQU-UHFFFAOYSA-N 0.000 description 2
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- KTSFMFGEAAANTF-UHFFFAOYSA-N [Cu].[Se].[Se].[In] Chemical compound [Cu].[Se].[Se].[In] KTSFMFGEAAANTF-UHFFFAOYSA-N 0.000 description 2
- 239000005354 aluminosilicate glass Substances 0.000 description 2
- 238000000151 deposition Methods 0.000 description 2
- 230000005525 hole transport Effects 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
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- 239000005361 soda-lime glass Substances 0.000 description 2
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 1
- 238000003848 UV Light-Curing Methods 0.000 description 1
- 229910021417 amorphous silicon Inorganic materials 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- 239000012159 carrier gas Substances 0.000 description 1
- 229910052798 chalcogen Inorganic materials 0.000 description 1
- 150000001787 chalcogens Chemical class 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 230000002542 deteriorative effect Effects 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000005038 ethylene vinyl acetate Substances 0.000 description 1
- 230000005281 excited state Effects 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 230000005283 ground state Effects 0.000 description 1
- 239000001307 helium Substances 0.000 description 1
- 229910052734 helium Inorganic materials 0.000 description 1
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 229910052738 indium Inorganic materials 0.000 description 1
- AMGQUBHHOARCQH-UHFFFAOYSA-N indium;oxotin Chemical compound [In].[Sn]=O AMGQUBHHOARCQH-UHFFFAOYSA-N 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910021421 monocrystalline silicon Inorganic materials 0.000 description 1
- 239000002105 nanoparticle Substances 0.000 description 1
- 150000004767 nitrides Chemical class 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 238000007500 overflow downdraw method Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 229910021420 polycrystalline silicon Inorganic materials 0.000 description 1
- 239000002861 polymer material Substances 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 238000004544 sputter deposition Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000001029 thermal curing Methods 0.000 description 1
- 229910052718 tin Inorganic materials 0.000 description 1
- 239000005341 toughened glass Substances 0.000 description 1
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Abstract
【解決手段】ベース基板;及び前記ベース基板に形成され、光を散乱させる空洞(voids)が内部に形成されている金属酸化物薄膜を含むことを特徴とする金属酸化物薄膜基板、その製造方法、これを含む光電池及び有機発光素子。
【選択図】図1
Description
すなわち、従来のように表面構造の制御だけでは散乱特性の向上には限界があった。
また、本発明の他の目的は、光閉じ込め及び光取り出し効果をいずれも実現することができる金属酸化物薄膜基板、その製造方法、これを含む光電池及び有機発光素子を提供することである。
また、本発明のまた他の目的は、光学特性と電気的特性をいずれも向上することができる金属酸化物薄膜基板、その製造方法、これを含む光電池及び有機発光素子を提供することである。
ここで、前記金属酸化物薄膜は、前記ベース基板上に形成され、表面に第1テクスチャリングが形成されている第1金属酸化物薄膜、及び前記第1金属酸化物薄膜上に形成され、及び、その表面に第2テクスチャリングが形成されている第2金属酸化物薄膜であって、該第2金属酸化物薄膜は単位体の組み合わせを含み、該単位体の各々の幅が、第2金属酸化物薄膜が前記第1金属酸化物薄膜とともに前記空洞を形成するように、上端に向かって広くなっている、第2金属酸化物薄膜を含んでいてよい。
このとき、前記複数の空洞は、前記ベース基板と平行な方向に沿って互いに連結されていてよい。
また、前記空洞の幅は、50〜400nmの幅であってよい。
さらには、前記金属酸化物薄膜は、散乱特性を増大するように前記空洞の屈折率(1.0)よりも高い屈折率を有する物質からなるものであってよい。
このとき、前記金属酸化物薄膜は、ZnO、SnO2、SiO2、TiO2及びNiOから選択されたいずれか一種からなるものであってよい。
また、前記金属酸化物薄膜は、n型またはp型ドーパントによってドープされていてよい。
このとき、前記金属酸化物薄膜は、Ga、Al及びFの少なくとも一種以上がドープされたn型のZnO、FがドープされたSnO2、電子ドナー(donor)またはホール(hole)元素がドープされたSiO2、電子ドナー元素がドープされたTiO2及び電子ドナー元素がドープされたNiOから選択されたいずれか一種からなるものであってよい。
そして、前記金属酸化物薄膜は、CuAlO2、CuGaO2、CulnO2、SrCu2O2及びLaCuOM(Mは酸素族元素)を含む金属酸化物群から選択されたいずれか一種の金属酸化物からなるものであってよい。
さらに、前記金属酸化物薄膜の面抵抗は、2〜20Ω/□であってよい。
また、前記金属酸化物薄膜のヘイズ値は、3〜100%であってよい。
一方、本発明は、ベース基板上に第1金属酸化物薄膜を成長させる第1ステップ;及び前記第1金属酸化物薄膜上にインサイチュ工程で第2金属酸化物薄膜を形成するステップであって、該第2金属酸化物薄膜は単位体の組み合わせを含み、該単位体の各々の幅が、第2金属酸化物薄膜が前記第1金属酸化物薄膜とともに前記空洞を形成するように、上端に向かって広くなっている、第2ステップを含むことを特徴とする金属酸化物薄膜基板の製造方法を提供する。
ここで、金属酸化物薄膜基板の製造方法では、常圧化学気相蒸着法(APCVD)によって前記第1及び第2ステップを実施していてよい。
また、金属酸化物薄膜基板の製造方法は、前記第1金属酸化物薄膜及び前記第2金属酸化物薄膜にドーパントをドープするステップをさらに含んでいてよい。
一方、本発明は、前記金属酸化物薄膜基板を透明電極基板として具備する光電池を提供する。
また、本発明は、前記金属酸化物薄膜基板を光取り出し層基板として具備する有機発光素子を提供する。
また、本発明によれば、光電池の透明電極への適用時に光電池の光閉じ込め効率を向上することができ、また、有機発光素子の光取り出し層への適用時に有機発光素子の光取り出し効率を向上することができる。
すなわち、本発明による金属酸化物薄膜基板は、光閉じ込め及び光取り出し効果をいずれも実現することができ、且つ、電気的特性をも向上することができる。
また、本発明によれば、透過特性を劣化することなく、散乱特性を向上することができ、且つ、厚さもまた低減させることができる。
また、本発明によれば、常圧化学気相蒸着法(APCVD)によるインサイチュ(in−situ)工程で製造することにより、工程時間を短縮することができる。
また、本発明によれば、従来用いられていたITOよりも相対的に低廉な金属酸化物を光閉じ込め及び光取り出し用薄膜の形成に用いることで、製造コストを削減することができる。
なお、本発明を説明するにあたって、関連公知機能あるいは構成についての具体的な説明が本発明の要旨を不要に曖昧にし得ると判断された場合、その詳細な説明は省略することにする。
したがって、本発明の範囲は前述の実施例に限定されるものではなく、特許請求の範囲や特許請求の範囲と均等なものなどによって決められるべきである。
110 ベース基板
120 金属酸化物薄膜
121 第1金属酸化物薄膜
121a 第1テクスチャリング
122 第2金属酸化物薄膜
122a 単位体
122b 第2テクスチャリング
130 空洞
Claims (16)
- ベース基板;及び
前記ベース基板上に形成され、光を散乱させる複数の空洞(voids)が内部に形成されている金属酸化物薄膜;
を含むことを特徴とする金属酸化物薄膜基板。 - 前記金属酸化物薄膜は、
前記ベース基板上に形成され、表面に第1テクスチャリングが形成されている第1金属酸化物薄膜、及び
前記第1金属酸化物薄膜上に形成され、及び、その表面に第2テクスチャリングが形成されている第2金属酸化物薄膜であって、該第2金属酸化物薄膜は単位体の組み合わせを含み、該単位体の各々の幅が、第2金属酸化物薄膜が前記第1金属酸化物薄膜とともに前記空洞を形成するように、上端に向かって広くなっている、第2金属酸化物薄膜を含むことを特徴とする請求項1に記載の金属酸化物薄膜基板。 - 前記複数の空洞は、前記ベース基板と平行な方向に沿って互いに連結されていることを特徴とする請求項2に記載の金属酸化物薄膜基板。
- 前記空洞の幅は、50〜400nmであることを特徴とする請求項3に記載の金属酸化物薄膜基板。
- 前記金属酸化物薄膜は、散乱特性を増大するように前記空洞の屈折率(1.0)よりも高い屈折率を有する物質からなることを特徴とする請求項1に記載の金属酸化物薄膜基板。
- 前記金属酸化物薄膜は、ZnO、SnO2、SiO2、TiO2及びNiOから選択されたいずれか一種からなることを特徴とする請求項5に記載の金属酸化物薄膜基板。
- 前記金属酸化物薄膜は、n型またはp型ドーパントによってドープされていることを特徴とする請求項6に記載の金属酸化物薄膜基板。
- 前記金属酸化物薄膜は、Ga、Al及びFの少なくとも一種以上がドープされたn型のZnO、FがドープされたSnO2、電子ドナー(donor)またはホール(hole)元素がドープされたSiO2、電子ドナー元素がドープされたTiO2及び電子ドナー元素がドープされたNiOから選択されたいずれか一種からなることを特徴とする請求項7に記載の金属酸化物薄膜基板。
- 前記金属酸化物薄膜は、CuAlO2、CuGaO2、CulnO2、SrCu2O2及びLaCuOM(Mは酸素族元素)を含む金属酸化物群から選択されたいずれか一種の金属酸化物からなることを特徴とする請求項5に記載の金属酸化物薄膜基板。
- 前記金属酸化物薄膜の面抵抗は、2〜20Ω/□であることを特徴とする請求項6に記載の金属酸化物薄膜基板。
- 前記金属酸化物薄膜のヘイズ値は、3〜100%であることを特徴とする請求項1に記載の金属酸化物薄膜基板。
- ベース基板上に第1金属酸化物薄膜を成長させる第1ステップ;及び
前記第1金属酸化物薄膜上にインサイチュ工程で第2金属酸化物薄膜を形成するステップであって、該第2金属酸化物薄膜は単位体の組み合わせを含み、該単位体の各々の幅が、第2金属酸化物薄膜が前記第1金属酸化物薄膜とともに前記空洞を形成するように、上端に向かって広くなっている、第2ステップ;
を含むことを特徴とする金属酸化物薄膜基板の製造方法。 - 常圧化学気相蒸着法(APCVD)によって前記第1及び第2ステップを実施することを特徴とする請求項12に記載の金属酸化物薄膜基板の製造方法。
- 前記第1金属酸化物薄膜及び前記第2金属酸化物薄膜にドーパントをドープするステップをさらに含むことを特徴とする請求項12に記載の金属酸化物薄膜基板の製造方法。
- 請求項1〜11のいずれか一項に記載の金属酸化物薄膜基板を透明電極基板として具備することを特徴とする光電池。
- 請求項1〜11のいずれか一項に記載の金属酸化物薄膜基板を光取り出し層基板として具備することを特徴とする有機発光素子。
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