JP6434039B2 - 無機マトリクス内に無機リガンドを有する量子ドット - Google Patents
無機マトリクス内に無機リガンドを有する量子ドット Download PDFInfo
- Publication number
- JP6434039B2 JP6434039B2 JP2016549419A JP2016549419A JP6434039B2 JP 6434039 B2 JP6434039 B2 JP 6434039B2 JP 2016549419 A JP2016549419 A JP 2016549419A JP 2016549419 A JP2016549419 A JP 2016549419A JP 6434039 B2 JP6434039 B2 JP 6434039B2
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- JP
- Japan
- Prior art keywords
- inorganic
- quantum dots
- luminescent
- luminescent material
- salt
- 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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- 239000002096 quantum dot Substances 0.000 title claims description 165
- 239000011159 matrix material Substances 0.000 title claims description 85
- 239000003446 ligand Substances 0.000 title description 112
- 239000000463 material Substances 0.000 claims description 143
- 238000000034 method Methods 0.000 claims description 91
- 150000003839 salts Chemical class 0.000 claims description 75
- 239000007788 liquid Substances 0.000 claims description 67
- 239000003795 chemical substances by application Substances 0.000 claims description 46
- 239000002245 particle Substances 0.000 claims description 43
- 239000011701 zinc Substances 0.000 claims description 42
- 230000008569 process Effects 0.000 claims description 40
- 238000000975 co-precipitation Methods 0.000 claims description 32
- 229910017053 inorganic salt Inorganic materials 0.000 claims description 25
- 239000011258 core-shell material Substances 0.000 claims description 15
- 229910052725 zinc Inorganic materials 0.000 claims description 10
- 150000001450 anions Chemical class 0.000 claims description 9
- 238000000295 emission spectrum Methods 0.000 claims description 9
- 238000004519 manufacturing process Methods 0.000 claims description 9
- 238000000926 separation method Methods 0.000 claims description 9
- 150000003751 zinc Chemical class 0.000 claims description 8
- 230000001376 precipitating effect Effects 0.000 claims description 7
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims description 5
- 230000005284 excitation Effects 0.000 claims description 5
- 238000012546 transfer Methods 0.000 claims description 5
- PTFCDOFLOPIGGS-UHFFFAOYSA-N Zinc dication Chemical compound [Zn+2] PTFCDOFLOPIGGS-UHFFFAOYSA-N 0.000 claims description 3
- 229940006486 zinc cation Drugs 0.000 claims description 3
- 229910052984 zinc sulfide Inorganic materials 0.000 description 60
- 239000005083 Zinc sulfide Substances 0.000 description 58
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- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 21
- -1 M 1 cation Chemical class 0.000 description 19
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- 239000000203 mixture Substances 0.000 description 19
- 239000012071 phase Substances 0.000 description 19
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- 239000011734 sodium Substances 0.000 description 17
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- 150000001875 compounds Chemical class 0.000 description 13
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- 229910052698 phosphorus Inorganic materials 0.000 description 7
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- IAZDPXIOMUYVGZ-UHFFFAOYSA-N Dimethylsulphoxide Chemical compound CS(C)=O IAZDPXIOMUYVGZ-UHFFFAOYSA-N 0.000 description 5
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- 229910019142 PO4 Inorganic materials 0.000 description 4
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- 125000003118 aryl group Chemical group 0.000 description 4
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- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 4
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- 150000002430 hydrocarbons Chemical group 0.000 description 4
- 229910052738 indium Inorganic materials 0.000 description 4
- RPQDHPTXJYYUPQ-UHFFFAOYSA-N indium arsenide Chemical compound [In]#[As] RPQDHPTXJYYUPQ-UHFFFAOYSA-N 0.000 description 4
- 229910010272 inorganic material Inorganic materials 0.000 description 4
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- JIAARYAFYJHUJI-UHFFFAOYSA-L zinc dichloride Chemical compound [Cl-].[Cl-].[Zn+2] JIAARYAFYJHUJI-UHFFFAOYSA-L 0.000 description 4
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- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 3
- 229910004611 CdZnTe Inorganic materials 0.000 description 3
- YMWUJEATGCHHMB-UHFFFAOYSA-N Dichloromethane Chemical compound ClCCl YMWUJEATGCHHMB-UHFFFAOYSA-N 0.000 description 3
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 description 3
- 229910001218 Gallium arsenide Inorganic materials 0.000 description 3
- 239000003570 air Substances 0.000 description 3
- 229910052787 antimony Inorganic materials 0.000 description 3
- 238000005119 centrifugation Methods 0.000 description 3
- 239000004205 dimethyl polysiloxane Substances 0.000 description 3
- 125000001072 heteroaryl group Chemical group 0.000 description 3
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- YBNMDCCMCLUHBL-UHFFFAOYSA-N (2,5-dioxopyrrolidin-1-yl) 4-pyren-1-ylbutanoate Chemical compound C=1C=C(C2=C34)C=CC3=CC=CC4=CC=C2C=1CCCC(=O)ON1C(=O)CCC1=O YBNMDCCMCLUHBL-UHFFFAOYSA-N 0.000 description 2
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- OGBVRMYSNSKIEF-UHFFFAOYSA-N Benzylphosphonic acid Chemical compound OP(O)(=O)CC1=CC=CC=C1 OGBVRMYSNSKIEF-UHFFFAOYSA-N 0.000 description 2
- 229910002601 GaN Inorganic materials 0.000 description 2
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- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 description 2
- 229910000661 Mercury cadmium telluride Inorganic materials 0.000 description 2
- LRHPLDYGYMQRHN-UHFFFAOYSA-N N-Butanol Chemical compound CCCCO LRHPLDYGYMQRHN-UHFFFAOYSA-N 0.000 description 2
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- WCUXLLCKKVVCTQ-UHFFFAOYSA-M Potassium chloride Chemical compound [Cl-].[K+] WCUXLLCKKVVCTQ-UHFFFAOYSA-M 0.000 description 2
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- 235000019253 formic acid Nutrition 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 125000002485 formyl group Chemical group [H]C(*)=O 0.000 description 1
- 125000002541 furyl group Chemical group 0.000 description 1
- 229910052733 gallium Inorganic materials 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 229910021480 group 4 element Inorganic materials 0.000 description 1
- 125000001188 haloalkyl group Chemical group 0.000 description 1
- 125000005843 halogen group Chemical group 0.000 description 1
- 125000005059 halophenyl group Chemical group 0.000 description 1
- 125000005842 heteroatom Chemical group 0.000 description 1
- 125000000592 heterocycloalkyl group Chemical group 0.000 description 1
- 238000001198 high resolution scanning electron microscopy Methods 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 125000004435 hydrogen atom Chemical group [H]* 0.000 description 1
- 125000002768 hydroxyalkyl group Chemical group 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 238000003384 imaging method Methods 0.000 description 1
- 238000002513 implantation Methods 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 238000010348 incorporation Methods 0.000 description 1
- 239000002198 insoluble material Substances 0.000 description 1
- QXJSBBXBKPUZAA-UHFFFAOYSA-N isooleic acid Natural products CCCCCCCC=CCCCCCCCCC(O)=O QXJSBBXBKPUZAA-UHFFFAOYSA-N 0.000 description 1
- 229910052745 lead Inorganic materials 0.000 description 1
- 239000004973 liquid crystal related substance Substances 0.000 description 1
- HSZCZNFXUDYRKD-UHFFFAOYSA-M lithium iodide Inorganic materials [Li+].[I-] HSZCZNFXUDYRKD-UHFFFAOYSA-M 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 229910052748 manganese Inorganic materials 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 1
- 229910052753 mercury Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000000693 micelle Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 239000011858 nanopowder Substances 0.000 description 1
- 239000002073 nanorod Substances 0.000 description 1
- 125000001624 naphthyl group Chemical group 0.000 description 1
- 125000000449 nitro group Chemical group [O-][N+](*)=O 0.000 description 1
- 125000006501 nitrophenyl group Chemical group 0.000 description 1
- ZQPPMHVWECSIRJ-KTKRTIGZSA-M oleate Chemical compound CCCCCCCC\C=C/CCCCCCCC([O-])=O ZQPPMHVWECSIRJ-KTKRTIGZSA-M 0.000 description 1
- 239000013307 optical fiber Substances 0.000 description 1
- 150000002894 organic compounds Chemical class 0.000 description 1
- 239000012074 organic phase Substances 0.000 description 1
- 125000002524 organometallic group Chemical group 0.000 description 1
- MPQXHAGKBWFSNV-UHFFFAOYSA-N oxidophosphanium Chemical class [PH3]=O MPQXHAGKBWFSNV-UHFFFAOYSA-N 0.000 description 1
- 239000005022 packaging material Substances 0.000 description 1
- 239000011236 particulate material Substances 0.000 description 1
- 239000008188 pellet Substances 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 125000005561 phenanthryl group Chemical group 0.000 description 1
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 description 1
- 150000003003 phosphines Chemical class 0.000 description 1
- RLOWWWKZYUNIDI-UHFFFAOYSA-N phosphinic chloride Chemical compound ClP=O RLOWWWKZYUNIDI-UHFFFAOYSA-N 0.000 description 1
- 229910000073 phosphorus hydride Inorganic materials 0.000 description 1
- 229920000515 polycarbonate Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920005644 polyethylene terephthalate glycol copolymer Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 229920000734 polysilsesquioxane polymer Polymers 0.000 description 1
- 239000004800 polyvinyl chloride Substances 0.000 description 1
- 238000012805 post-processing Methods 0.000 description 1
- 239000011591 potassium Substances 0.000 description 1
- 229910052700 potassium Inorganic materials 0.000 description 1
- LJCNRYVRMXRIQR-OLXYHTOASA-L potassium sodium L-tartrate Chemical compound [Na+].[K+].[O-]C(=O)[C@H](O)[C@@H](O)C([O-])=O LJCNRYVRMXRIQR-OLXYHTOASA-L 0.000 description 1
- 229940074439 potassium sodium tartrate Drugs 0.000 description 1
- 239000002243 precursor Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 125000002924 primary amino group Chemical group [H]N([H])* 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- BDERNNFJNOPAEC-UHFFFAOYSA-N propan-1-ol Chemical compound CCCO BDERNNFJNOPAEC-UHFFFAOYSA-N 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 125000004076 pyridyl group Chemical group 0.000 description 1
- 125000000168 pyrrolyl group Chemical group 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
- 239000000376 reactant Substances 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 230000002441 reversible effect Effects 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- FVAUCKIRQBBSSJ-UHFFFAOYSA-M sodium iodide Inorganic materials [Na+].[I-] FVAUCKIRQBBSSJ-UHFFFAOYSA-M 0.000 description 1
- 235000011006 sodium potassium tartrate Nutrition 0.000 description 1
- 239000002195 soluble material Substances 0.000 description 1
- 239000011877 solvent mixture Substances 0.000 description 1
- 239000012798 spherical particle Substances 0.000 description 1
- 239000010907 stover Substances 0.000 description 1
- 125000001424 substituent group Chemical group 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- WGPCGCOKHWGKJJ-UHFFFAOYSA-N sulfanylidenezinc Chemical compound [Zn]=S WGPCGCOKHWGKJJ-UHFFFAOYSA-N 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- PORWMNRCUJJQNO-UHFFFAOYSA-N tellurium atom Chemical compound [Te] PORWMNRCUJJQNO-UHFFFAOYSA-N 0.000 description 1
- 230000002123 temporal effect Effects 0.000 description 1
- 229910002058 ternary alloy Inorganic materials 0.000 description 1
- BKVIYDNLLOSFOA-UHFFFAOYSA-N thallium Chemical compound [Tl] BKVIYDNLLOSFOA-UHFFFAOYSA-N 0.000 description 1
- 238000005979 thermal decomposition reaction Methods 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
- 125000000101 thioether group Chemical group 0.000 description 1
- 125000003944 tolyl group Chemical group 0.000 description 1
- RMZAYIKUYWXQPB-UHFFFAOYSA-N trioctylphosphane Chemical compound CCCCCCCCP(CCCCCCCC)CCCCCCCC RMZAYIKUYWXQPB-UHFFFAOYSA-N 0.000 description 1
- ZMBHCYHQLYEYDV-UHFFFAOYSA-N trioctylphosphine oxide Chemical compound CCCCCCCCP(=O)(CCCCCCCC)CCCCCCCC ZMBHCYHQLYEYDV-UHFFFAOYSA-N 0.000 description 1
- 229910052720 vanadium Inorganic materials 0.000 description 1
- 238000001429 visible spectrum Methods 0.000 description 1
- 229910052727 yttrium Inorganic materials 0.000 description 1
- 150000003752 zinc compounds Chemical class 0.000 description 1
- LRXTYHSAJDENHV-UHFFFAOYSA-H zinc phosphate Chemical compound [Zn+2].[Zn+2].[Zn+2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O LRXTYHSAJDENHV-UHFFFAOYSA-H 0.000 description 1
- 229910000165 zinc phosphate Inorganic materials 0.000 description 1
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Description
(i)開始液体中に、無機キャッピング剤を有するルミネセント量子ドットを供給することと、
(ii)共沈プロセスにて、開始液体からの沈殿物質を有する無機塩を沈殿させることと、
(iii)分離プロセスにて、開始液体から沈殿物質を分離して、ルミネセント材料を提供することと
を有する。
具体的な一実施形態において、アニールは、例えば特には200−350℃など、少なくとも150−400℃の温度範囲内で行われ得る。また、(このような)アニールは、特に、不活性雰囲気又は周囲空気の中で行われ得る。驚くべきことに、周囲空気中で、特には250−350℃の範囲内の温度までで、良好な結果が得られた。また、共沈(及び分離)後の材料が、例えば上述の粒子状材料を得るために、例えばとりわけアニール及び/又は加熱、錠剤化などによって圧縮されてもよい。
(Y−)k−n−(X)−(−L)n
を有し得る。ここで、kは、2、3、4、又は5であり、nは、k−nがゼロより小さくならないように、1、2、3、4、又は5であり、Xは、O、OS、O−Se、O−N、O−P、O−As、S、S=O、SO2、Se、Se=O、N、N=O、P、P=O、C=O、As、又はAs=Oであり、Y及びLは各々独立に、H、OH、アリール、ヘテロアリール、又は、場合により、少なくとも1つの二重結合、少なくとも1つの三重結合、若しくは少なくとも1つの二重結合及び1つの三重結合を含んだ、直鎖若しくは分岐鎖のC2−18炭化水素鎖である。この炭化水素鎖は、場合により、1つ以上のC1−4アルキル、C2−4アルケニル、C2−4アルキニル、C1−4アルコキシ、ヒドロキシル、ハロ、アミノ、ニトロ、シアノ、C3−5シクロアルキル、3−5員ヘテロシクロアルキル、アリール、ヘテロアリール、C1−4アルキルカルボニルオキシ、C1−4アルキルオキシカルボニル、C1−4アルキルカルボニル、又はホルミルで置き換えられ得る。この炭化水素鎖はまた、場合により、−O−、−S−、−N(Ra)−、−N(Ra)−C(O)−O−、−O−C(O)−N(Ra)−、−N(Ra)−C(O)−N(Rb)−、−O−C(O)−O−、−P(Ra)−、又は−P(O)(Ra)−によって中断され得る。Ra及びRbの各々は独立に、水素、アルキル、アルケニル、アルキニル、アルコキシ、ヒドロキシルアルキル、ヒドロキシル、又はハロアルキルである。アリール基は、置換又は非置換の環状芳香族基である。例は、フェニル、ベンジル、ナフチル、トリル、アントラシル、ニトロフェニル、又はハロフェニルを含む。ヘテロアリール基は、例えばフリル、ピリジル、ピロリル、フェナントリルなど、リング内に1つ以上のヘテロ原子を有するアリール基である。
例1
オレイン酸塩リガンドを有するCrystalplex社から商業的に入手可能な量子ドット(CdSe/CdS/ZnSコア/シェル/シェル)を、1.75mLのn−へプタンに0.25mLのqドット溶液(トルエン内で5mg/mL)を付加することによって無機リガンド交換にかけた。2mLのホルムアミデ(FA)に対して0.125mLの水内1M(NH4)4Sn2S6により、極性相を作り出した。これら2つの相を混ぜ合わせて、45分間激しく撹拌した。有機層を除去し、FA相をn−へプタン(1−2mL)で4回洗浄した。最後に、クリアなFA相を収集し、これに、3mLのアセトニトリルを数滴(およそ15μL)の無機リガンド溶液とともに付加して、qドットを沈殿させた。
オレイン酸塩リガンドを有する商業的に入手可能な量子ドット(Crystalplex社、CdSe/CdS/ZnSコア/シェル/シェル)(575nmで発光)を、2mLのn−へプタンに0.25mLのqドット溶液(トルエン内1mg/mL)を付加することによって無機リガンド交換にかけた。極性相は、2mLのホルムアミデ(FA)内5mg/mLのNa2S・9H2O溶液であった。これら2つの相を混ぜ合わせて、30分間激しく撹拌した。有機層を除去し、FA相をn−へプタン(1−2mL)で4回洗浄した。最後に、クリアなFA相を収集し、これに、3mLのアセトニトリルを付加して、qドットを沈殿させた。
5mLの10M KOH溶液に3.125mLの1M ZnCl2溶液(双方とも水内)を付加することによって、亜鉛酸カリウム(K2[Zn(OH)4])の水溶液を作製した。得られた溶液を、Znにして0.125M、KOHにして2Mの最終的な濃度まで水で希釈した。
オレイン酸塩リガンドを有するCrystalplex社から商業的に入手可能な量子ドット(CdSe/CdS/ZnSコア/シェル/シェル)(610nmで発光;QE80%)を、水内1M KOH中で、亜鉛酸塩(Zn(OH)4 2−)の溶液を用いて処理した。最終的なqドット濃度はこの溶液内で0.625mg/mLであった。
この例では、全ての処理を、乾いた溶媒及び化学物質を用いて、水なし(グローブボックス)条件の下で行った。
異なる不溶性塩の混合物を作製することが可能であり、ここでそれを試した。この実験は、乾いた化学物質を用いて、乾いたグローブボックス環境内で行った。例4からのCrystalplex社のドットを、乾燥したホルムアミデ内の乾いたNa3PO4の溶液(15mL)で処理することによって、無機リガンド交換されたドットを作製し、これは60%のQEを有していた。最終的なqドット濃度は、余分なリガンドを除去するための検査後、この溶液内で0.625mg/mLであった。
混合マトリクスの他の一例はZnCdSである。潜在的に、マトリクス内のCdは、qドット(の表面)へのダメージを修復する助けとなり得る。先ず、異なる塩の0.1M溶液の必要な混合により、Zn0.75Cd0.25Sマトリクスを共沈させることによって、テストを行った。UV/Vis及びXRD解析により、合金が形成されたことが示された。
後処理はオプションであり、それらオプションのうちの1つは、無機マトリクスをアニールすることである。これを、ZnSマトリクス及びZn3(PO4)2マトリクスの双方に関して試みた。XRD解析によって観察されたことには、400℃までのアニールは、純粋なマトリクスに対して如何なる影響も有しなかった。マトリクス内のqドットについては状況が異なる。ZnSマトリクスでは、雰囲気にかかわらず、およそ200℃より上で、アニールは常にQEの低下をもたらした。Zn3(PO4)2マトリクスでは、乾いた空気又は窒素の中でのアニールは、発光に対して如何なる影響も有しなかった。しかしながら、周囲空気中でのアニールは、発光の増大(最大300℃にて)と、発光のブルーシフトとをもたらした(以下の表を参照)。サンプルは、リン酸亜鉛マトリクス内でリン酸塩リガンド交換されている。これは、複合材料を作製した後に後処理を用いて発光及び発光波長をエンハンスできる可能性を例証するものである。これについて、より高濃度の複合材料(マトリクス内およそ5%のqドット)でも試みた。その結果はあまり明らかでなく、濃度が役割を果たさかもしれないことを指し示している。
Claims (15)
- 量子ドットに基づくルミネセント材料の製造の方法であって、
(i)開始液体中に、無機キャッピング剤を有するルミネセント量子ドットを供給することと、
(ii)共沈プロセスにて、前記開始液体からの沈殿物質を有する無機塩を沈殿させることであり、前記沈殿物質は、共沈された前記無機塩によってホストされた前記量子ドットを有する、沈殿させることと、
(iii)分離プロセスにて、前記開始液体から前記沈殿物質を分離して、前記ルミネセント材料を提供することと、
を有する方法。 - 当該方法は、
(i)有機キャッピング剤を有するルミネセント量子ドットを供給し、交換プロセスにて、前記開始液体中に、前記無機キャッピング剤を有する前記ルミネセント量子ドットを供給すること
を有する、請求項1に記載の方法。 - 前記交換プロセスは相間移動プロセスを有する、請求項2に記載の方法。
- 前記分離プロセスの後に、前記沈殿物質が更に、0.5−40μmの範囲内の数値平均粒子サイズを持つルミネセント材料を提供するプロセスにかけられる、請求項1乃至3の何れか一項に記載の方法。
- 前記ルミネセント量子ドットは外層を持ち、前記共沈プロセスにおいて、2つ以上の塩が適用され、前記塩のうちの少なくとも1つと前記外層とが或る元素を共通に有し、且つ前記無機キャッピング剤と前記塩のうちの1つ以上とが或る元素を共通に有する、請求項1乃至4の何れか一項に記載の方法。
- 前記ルミネセント量子ドットは、ZnSを有する外層を持ち、前記無機キャッピング剤は、S2−、HS−、SnS4 4−、Sn2S6 4−、ZnCl4 2−、Zn(OH)4 2−、及びZn(NO3)4 2−のうちの1つ以上を有し、前記少なくとも2つの塩は、第1の亜鉛塩と第2の非亜鉛塩とを有し、前記第1の亜鉛塩は亜鉛カチオンを有し、前記第2の非亜鉛塩はアニオンを有し、前記亜鉛カチオンと前記アニオンとが、前記開始液体中で不溶性の塩を形成する、請求項1乃至5の何れか一項に記載の方法。
- 少なくとも2つの異なるタイプのルミネセント量子ドットが供給され、前記異なるタイプのルミネセント量子ドットは、青色光又はUV光での励起を受けて異なる発光スペクトルを持つ、請求項1乃至6の何れか一項に記載の方法。
- 量子ドットに基づくルミネセント材料であって、前記量子ドットは無機キャッピング剤を有し、当該ルミネセント材料は、前記無機キャッピング剤を有する前記量子ドットをホストする無機塩マトリクスを持つ粒子を有する、ルミネセント材料。
- 前記量子ドットは、ZnSを有する外層を持ち、
前記無機キャッピング剤は、S2−、HS−、SnS4 4−、Sn2S6 4−、ZnCl4 2−、Zn(OH)4 2−、及びZn(NO3)4 2−のうちの1つ以上を有し、且つ
(i)前記無機塩マトリクスの無機塩と前記量子ドットの前記外層とが或る元素を共通に有すること、及び(ii)前記無機キャッピング剤と前記無機塩マトリクスとが或る元素を共通に有すること、のうちの一方又は双方が該当する、
請求項8に記載のルミネセント材料。 - 前記量子ドットは、前記粒子内に分散されており、前記粒子は、0.5−40μmの範囲内の数値平均粒子サイズを持ち、且つ当該ルミネセント材料は、当該ルミネセント材料の総重量に対して0.01−5wt%の範囲内の量子ドットを有する、請求項8又は9に記載のルミネセント材料。
- 請求項1乃至7の何れか一項に記載の方法によって得ることが可能な、請求項8乃至10の何れか一項に記載のルミネセント材料。
- 請求項8乃至11の何れか一項に記載のルミネセント材料又は請求項1乃至7の何れか一項に記載の方法によって得られたルミネセント材料が埋め込まれた母材を有する波長コンバータ素子。
- 光源と、
請求項8乃至11の何れか一項に記載のルミネセント材料、又は請求項1乃至7の何れか一項に記載の方法によって得られたルミネセント材料と
を有し、
前記光源は、前記ルミネセント材料を照らすように構成されている、
照明デバイス。 - 前記量子ドットは、シェルがZnSを有するコア−シェル型のものであり、前記無機キャッピング剤を有する前記量子ドットをホストする前記無機塩マトリクスもZnSを有し、且つ前記キャッピング剤は、S2−、HS−、SnS4 4−、Sn2S6 4−、ZnCl4 2−、Zn(OH)4 2−、及びZn(NO3)4 2−のうちの1つ以上を有する、請求項13に記載の照明デバイス。
- 請求項12に記載の波長コンバータ素子を有する請求項13又は14に記載の照明デバイス。
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