JP6478964B2 - 波長変換材料およびその用途 - Google Patents
波長変換材料およびその用途 Download PDFInfo
- Publication number
- JP6478964B2 JP6478964B2 JP2016231083A JP2016231083A JP6478964B2 JP 6478964 B2 JP6478964 B2 JP 6478964B2 JP 2016231083 A JP2016231083 A JP 2016231083A JP 2016231083 A JP2016231083 A JP 2016231083A JP 6478964 B2 JP6478964 B2 JP 6478964B2
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- JP
- Japan
- Prior art keywords
- light emitting
- emitting diode
- inorganic perovskite
- perovskite quantum
- wavelength conversion
- 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.)
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Classifications
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- 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
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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
- C09K11/08—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials
- C09K11/61—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing fluorine, chlorine, bromine, iodine or unspecified halogen elements
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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
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- H01L33/36—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 electrodes
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- 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
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- H01S3/005—Optical devices external to the laser cavity, specially adapted for lasers, e.g. for homogenisation of the beam or for manipulating laser pulses, e.g. pulse shaping
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- H01L2224/47—Structure, shape, material or disposition of the wire connectors after the connecting process
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- 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
- H01L27/153—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 in a repetitive configuration, e.g. LED bars
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- H01L33/50—Wavelength conversion elements
- H01L33/501—Wavelength conversion elements characterised by the materials, e.g. binder
- H01L33/502—Wavelength conversion materials
- H01L33/504—Elements with two or more wavelength conversion materials
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- H—ELECTRICITY
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- 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
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- H01L33/62—Arrangements for conducting electric current to or from the semiconductor body, e.g. lead-frames, wire-bonds or solder balls
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Description
本発明は、概して、波長変換材料およびその用途に関し、特に、全無機ペロブスカイト量子ドットを含む波長変換材料およびその用途に関する。
現在、一般的な発光材料には、多くの場合、蛍光体粉末および量子ドットが用いられている。しかし、蛍光体粉末の市場はほぼ飽和状態に近い。蛍光体粉末の発光スペクトルの半値全幅(FWHM)は、大抵広く、飛躍的に向上させることが困難である。これは、デバイスへの用途に技術的限界をもたらす。それゆえ、研究動向は量子ドットの分野へと向かっている。
本開示の実施形態は、波長変換材料およびその用途に関する。波長変換材料は、CsPb(ClaBr1-a-bIb)3の化学式を有する全無機ペロブスカイト量子ドットを含む。全無機ペロブスカイト量子ドットの組成および/または大きさに従って全無機ペロブスカイト量子ドットからの出射光の波長を調節することができ、それゆえ、全無機ペロブスカイト量子ドットは広い用途に適している。さらに、全無機ペロブスカイト量子ドットは、半値全幅(FWHM)が狭く良好な色純度を有する発光スペクトルを呈することができる。したがって、光源などの発光デバイスの使用、またはディスプレイデバイス用の使用等において全無機ペロブスカイト量子ドットを適用して、演色性、色精度、色域などの発光効果を向上させることができる。
図24は、一実施形態による発光デバイスの製造方法を示す。
図25は、一実施形態による発光デバイスの製造方法を示す。
図26は、一実施形態による発光デバイスの製造方法を示す。
[全無機ペロブスカイト量子の製造]
[赤色/緑色全無機ペロブスカイト量子ドットCsPb(Br1-bIb)3]
[全無機ペロブスカイト量子ドットCsPb(ClaBr1-a)3]
[発光ダイオードパッケージ構造体]
Claims (17)
- 発光デバイスであって、
青色発光ダイオードチップである発光ダイオードチップと、
光吸収性材料または反射性材料を含む隔離層と、
複数の波長変換層と、
を含み、
該複数の波長変換層は、各々が該発光ダイオードチップから発せられる第1光によって励起されて該第1光の波長とは異なる波長を有する第2光を発することができ、
該複数の波長変換層は、1つは赤色用であり、他の1つは緑色用であり、該複数の波長変換層のうちの該1つと該他の1つのうち、少なくとも1つは全無機ペロブスカイト量子ドットを含み、該複数の波長変換層のうちの該1つの全無機ペロブスカイト量子ドットは、赤色全無機ペロブスカイト量子ドットであって、CsPb(Br1-bIb)3の化学式を有し、式中、0.5≦b≦1であり、該複数の波長変換層のうちの該他の1つの全無機ペロブスカイト量子ドットは、緑色全無機ペロブスカイト量子ドットであって、CsPb(Br1-bIb)3の化学式を有し、式中、0≦b<0.5であり、
該複数の波長変換層のうちさらに別の1つは、透明材料、青色蛍光体粉末、青色全無機ペロブスカイト量子ドット、またはそれらの組合せを含み、該青色全無機ペロブスカイト量子ドットはCsPb(ClaBr1-a)3の化学式を有し、式中、0<a≦1であり、
前記複数の波長変換層の各々は、前記発光ダイオードチップ単体の同一の発光面と接触するとともに、互いに前記隔離層により隔てられている、
発光デバイス。 - 前記赤色全無機ペロブスカイト量子ドットから発せられる前記第2光が、570nm〜700nmの波ピーク、20nm〜60nmの半値全幅(FWHM)を有する、請求項1に記載の発光デバイス。
- 前記緑色全無機ペロブスカイト量子ドットから発せられる前記第2光が、500nm〜570nmの波ピーク、15nm〜40nmのFWHMを有する、請求項1に記載の発光デバイス。
- 前記青色全無機ペロブスカイト量子ドットから発せられる前記第2光が、400nm〜500nmの波ピーク、10nm〜30nmのFWHMを有する、請求項1に記載の発光デバイス。
- 前記赤色全無機ペロブスカイト量子ドットが、10nm〜14nmの範囲内の粒径を、または前記緑色全無機ペロブスカイト量子ドットが、8nm〜12nmの範囲内の粒径を、または前記青色全無機ペロブスカイト量子ドットが、7nm〜10nmの範囲内の粒径を有する、請求項1に記載の発光デバイス。
- マイクロ発光ダイオードである、請求項1〜5のいずれか1項に記載の発光デバイス。
- 前記発光ダイオードチップが、前記発光ダイオードチップの対向する面に第1電極および第2電極を有し、前記発光ダイオードチップの発光面と該第1電極とが前記発光ダイオードチップの同じ側にある、請求項1〜6のいずれか1項に記載の発光デバイス。
- ディスプレイに適用され、少なくとも赤色サブピクセル、緑色サブピクセルおよび青色サブピクセルが各々に含まれているピクセルを含み、
前記複数の波長変換層のうちの前記1つは、該赤色サブピクセルに対応し、前記複数の波長変換層のうちの前記他の1つは、該緑色サブピクセルに対応し、前記複数の波長変換層のうちの前記さらに別の1つは、該青色サブピクセルに対応する、
請求項1〜7のいずれか1項に記載の発光デバイス。 - 前記ピクセルの各々が、前記複数の波長変換層のうちのもう1つを含みかつ前記隔離層によって前記赤色サブピクセル、前記緑色サブピクセルおよび前記青色サブピクセルから分離されている白色サブピクセルをさらに含む、請求項8に記載の発光デバイス。
- 前記赤色全無機ペロブスカイト量子ドット又は前記緑色全無機ペロブスカイト量子ドットが、別の透明材料にドープされている、請求項1〜9のいずれか1項に記載の発光デバイス。
- バックライトモジュール、照明デバイス又はマイクロLEDディスプレイに適用される、請求項1〜10のいずれか1項に記載の発光デバイス。
- NTSCが90%以上である、請求項1に記載の発光デバイス。
- 75以上の平均演色評価数(Ra)を有する、請求項1に記載の発光デバイス。
- 前記複数の波長変換層のうちの前記1つが、前記赤色全無機ペロブスカイト量子ドットを含み、前記複数の波長変換層のうちの前記他の1つが、前記緑色全無機ペロブスカイト量子ドットを含む、
請求項1〜13に記載の発光デバイス。 - 前記発光ダイオードチップ単体は、前記複数の波長変換層にそれぞれ対応する複数の第1電極を含み、前記発光面と該複数の第1電極は前記発光ダイオードチップ単体の同じ側にある、
請求項1〜14に記載の発光デバイス。 - 前記発光ダイオードチップ単体は、前記発光ダイオードチップ単体の前記発光面の反対側に第2の電極をさらに含み、該第2の電極は前記複数の波長変換層の共通電極である、
請求項15に記載の発光デバイス。 - 前記複数の波長変換層は、前記発光ダイオードチップ単体の前記発光面上に直接配置され、前記複数の波長変換層の上面は、前記複数の第1電極の上面より高い位置にある、
請求項1〜15に記載の発光デバイス。
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2016
- 2016-10-19 CN CN201610909380.XA patent/CN106816520A/zh active Pending
- 2016-11-22 US US15/358,339 patent/US20170155020A1/en not_active Abandoned
- 2016-11-29 DE DE102016223645.8A patent/DE102016223645A1/de not_active Withdrawn
- 2016-11-29 JP JP2016231083A patent/JP6478964B2/ja active Active
- 2016-11-30 KR KR1020160162205A patent/KR20170066257A/ko not_active Application Discontinuation
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US20170155020A1 (en) | 2017-06-01 |
KR20170066257A (ko) | 2017-06-14 |
CN106816520A (zh) | 2017-06-09 |
DE102016223645A1 (de) | 2017-06-01 |
JP2017108129A (ja) | 2017-06-15 |
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