CN110184044B - 一种复合纳米结构及其制备方法 - Google Patents
一种复合纳米结构及其制备方法 Download PDFInfo
- Publication number
- CN110184044B CN110184044B CN201910397487.4A CN201910397487A CN110184044B CN 110184044 B CN110184044 B CN 110184044B CN 201910397487 A CN201910397487 A CN 201910397487A CN 110184044 B CN110184044 B CN 110184044B
- Authority
- CN
- China
- Prior art keywords
- solution
- reaction
- quantum dot
- dissolving
- powder
- 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.)
- Active
Links
- 239000002131 composite material Substances 0.000 title claims abstract description 33
- 239000002086 nanomaterial Substances 0.000 title claims abstract description 19
- 238000002360 preparation method Methods 0.000 title abstract description 15
- 239000000243 solution Substances 0.000 claims abstract description 58
- 239000002096 quantum dot Substances 0.000 claims abstract description 51
- 239000011259 mixed solution Substances 0.000 claims abstract description 21
- ZMXDDKWLCZADIW-UHFFFAOYSA-N N,N-Dimethylformamide Chemical compound CN(C)C=O ZMXDDKWLCZADIW-UHFFFAOYSA-N 0.000 claims description 30
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 claims description 24
- 238000006243 chemical reaction Methods 0.000 claims description 21
- 229910004613 CdTe Inorganic materials 0.000 claims description 16
- ISWNAMNOYHCTSB-UHFFFAOYSA-N methanamine;hydrobromide Chemical compound [Br-].[NH3+]C ISWNAMNOYHCTSB-UHFFFAOYSA-N 0.000 claims description 16
- UHYPYGJEEGLRJD-UHFFFAOYSA-N cadmium(2+);selenium(2-) Chemical class [Se-2].[Cd+2] UHYPYGJEEGLRJD-UHFFFAOYSA-N 0.000 claims description 15
- 238000003756 stirring Methods 0.000 claims description 15
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 claims description 14
- 239000000843 powder Substances 0.000 claims description 14
- CWERGRDVMFNCDR-UHFFFAOYSA-N thioglycolic acid Chemical compound OC(=O)CS CWERGRDVMFNCDR-UHFFFAOYSA-N 0.000 claims description 12
- 238000000034 method Methods 0.000 claims description 11
- 239000000203 mixture Substances 0.000 claims description 10
- WRIDQFICGBMAFQ-UHFFFAOYSA-N (E)-8-Octadecenoic acid Natural products CCCCCCCCCC=CCCCCCCC(O)=O WRIDQFICGBMAFQ-UHFFFAOYSA-N 0.000 claims description 9
- QGLWBTPVKHMVHM-KTKRTIGZSA-N (z)-octadec-9-en-1-amine Chemical compound CCCCCCCC\C=C/CCCCCCCCN QGLWBTPVKHMVHM-KTKRTIGZSA-N 0.000 claims description 9
- LQJBNNIYVWPHFW-UHFFFAOYSA-N 20:1omega9c fatty acid Natural products CCCCCCCCCCC=CCCCCCCCC(O)=O LQJBNNIYVWPHFW-UHFFFAOYSA-N 0.000 claims description 9
- QSBYPNXLFMSGKH-UHFFFAOYSA-N 9-Heptadecensaeure Natural products CCCCCCCC=CCCCCCCCC(O)=O QSBYPNXLFMSGKH-UHFFFAOYSA-N 0.000 claims description 9
- ZQPPMHVWECSIRJ-UHFFFAOYSA-N Oleic acid Natural products CCCCCCCCC=CCCCCCCCC(O)=O ZQPPMHVWECSIRJ-UHFFFAOYSA-N 0.000 claims description 9
- 239000005642 Oleic acid Substances 0.000 claims description 9
- QXJSBBXBKPUZAA-UHFFFAOYSA-N isooleic acid Natural products CCCCCCCC=CCCCCCCCCC(O)=O QXJSBBXBKPUZAA-UHFFFAOYSA-N 0.000 claims description 9
- ZQPPMHVWECSIRJ-KTKRTIGZSA-N oleic acid Chemical compound CCCCCCCC\C=C/CCCCCCCC(O)=O ZQPPMHVWECSIRJ-KTKRTIGZSA-N 0.000 claims description 9
- 239000012295 chemical reaction liquid Substances 0.000 claims description 7
- 239000012299 nitrogen atmosphere Substances 0.000 claims description 6
- 239000002994 raw material Substances 0.000 claims description 6
- 229910000033 sodium borohydride Inorganic materials 0.000 claims description 6
- 239000012279 sodium borohydride Substances 0.000 claims description 6
- 239000003381 stabilizer Substances 0.000 claims description 6
- 239000008346 aqueous phase Substances 0.000 claims description 5
- BUGBHKTXTAQXES-UHFFFAOYSA-N Selenium Chemical compound [Se] BUGBHKTXTAQXES-UHFFFAOYSA-N 0.000 claims description 4
- PORWMNRCUJJQNO-UHFFFAOYSA-N tellurium atom Chemical compound [Te] PORWMNRCUJJQNO-UHFFFAOYSA-N 0.000 claims description 4
- 239000012071 phase Substances 0.000 claims description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 claims 3
- 239000004065 semiconductor Substances 0.000 abstract description 20
- 239000002159 nanocrystal Substances 0.000 abstract description 12
- 150000004820 halides Chemical class 0.000 abstract description 7
- 238000002156 mixing Methods 0.000 abstract description 7
- -1 methyl ammonium halide Chemical class 0.000 abstract description 6
- 239000003960 organic solvent Substances 0.000 abstract description 6
- 239000003446 ligand Substances 0.000 abstract description 5
- 238000009792 diffusion process Methods 0.000 abstract description 4
- 230000006798 recombination Effects 0.000 abstract description 4
- 238000005215 recombination Methods 0.000 abstract description 4
- 230000001699 photocatalysis Effects 0.000 abstract description 3
- 238000007146 photocatalysis Methods 0.000 abstract description 3
- 238000013386 optimize process Methods 0.000 abstract 1
- 239000000463 material Substances 0.000 description 8
- SBIBMFFZSBJNJF-UHFFFAOYSA-N selenium;zinc Chemical compound [Se]=[Zn] SBIBMFFZSBJNJF-UHFFFAOYSA-N 0.000 description 7
- 125000004432 carbon atom Chemical group C* 0.000 description 4
- 238000002441 X-ray diffraction Methods 0.000 description 3
- 150000001412 amines Chemical class 0.000 description 3
- 229910052792 caesium Inorganic materials 0.000 description 3
- 235000014113 dietary fatty acids Nutrition 0.000 description 3
- 239000000194 fatty acid Substances 0.000 description 3
- 229930195729 fatty acid Natural products 0.000 description 3
- 150000004665 fatty acids Chemical class 0.000 description 3
- IAZDPXIOMUYVGZ-UHFFFAOYSA-N Dimethylsulphoxide Chemical compound CS(C)=O IAZDPXIOMUYVGZ-UHFFFAOYSA-N 0.000 description 2
- 238000003917 TEM image Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- TVFDJXOCXUVLDH-UHFFFAOYSA-N caesium atom Chemical compound [Cs] TVFDJXOCXUVLDH-UHFFFAOYSA-N 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000002073 nanorod Substances 0.000 description 2
- 239000012074 organic phase Substances 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 238000001308 synthesis method Methods 0.000 description 2
- XDTMQSROBMDMFD-UHFFFAOYSA-N Cyclohexane Chemical compound C1CCCCC1 XDTMQSROBMDMFD-UHFFFAOYSA-N 0.000 description 1
- 239000000969 carrier Substances 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000000695 excitation spectrum Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 1
- 239000008204 material by function Substances 0.000 description 1
- NQMRYBIKMRVZLB-UHFFFAOYSA-N methylamine hydrochloride Chemical group [Cl-].[NH3+]C NQMRYBIKMRVZLB-UHFFFAOYSA-N 0.000 description 1
- LLWRXQXPJMPHLR-UHFFFAOYSA-N methylazanium;iodide Chemical compound [I-].[NH3+]C LLWRXQXPJMPHLR-UHFFFAOYSA-N 0.000 description 1
- 239000012454 non-polar solvent Substances 0.000 description 1
- CCCMONHAUSKTEQ-UHFFFAOYSA-N octadecene Natural products CCCCCCCCCCCCCCCCC=C CCCMONHAUSKTEQ-UHFFFAOYSA-N 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000002798 polar solvent Substances 0.000 description 1
- 239000002243 precursor Substances 0.000 description 1
- 239000004054 semiconductor nanocrystal Substances 0.000 description 1
- 238000009827 uniform distribution Methods 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J31/00—Catalysts comprising hydrides, coordination complexes or organic compounds
- B01J31/16—Catalysts comprising hydrides, coordination complexes or organic compounds containing coordination complexes
- B01J31/18—Catalysts comprising hydrides, coordination complexes or organic compounds containing coordination complexes containing nitrogen, phosphorus, arsenic or antimony as complexing atoms, e.g. in pyridine ligands, or in resonance therewith, e.g. in isocyanide ligands C=N-R or as complexed central atoms
- B01J31/1805—Catalysts comprising hydrides, coordination complexes or organic compounds containing coordination complexes containing nitrogen, phosphorus, arsenic or antimony as complexing atoms, e.g. in pyridine ligands, or in resonance therewith, e.g. in isocyanide ligands C=N-R or as complexed central atoms the ligands containing nitrogen
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J35/00—Catalysts, in general, characterised by their form or physical properties
- B01J35/20—Catalysts, in general, characterised by their form or physical properties characterised by their non-solid state
- B01J35/23—Catalysts, in general, characterised by their form or physical properties characterised by their non-solid state in a colloidal state
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J35/00—Catalysts, in general, characterised by their form or physical properties
- B01J35/30—Catalysts, in general, characterised by their form or physical properties characterised by their physical properties
- B01J35/39—Photocatalytic properties
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B82—NANOTECHNOLOGY
- B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
- B82Y30/00—Nanotechnology for materials or surface science, e.g. nanocomposites
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B82—NANOTECHNOLOGY
- B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
- B82Y40/00—Manufacture or treatment of nanostructures
-
- 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
- C09K11/02—Use of particular materials as binders, particle coatings or suspension media therefor
-
- 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
- C09K11/06—Luminescent, e.g. electroluminescent, chemiluminescent materials containing organic luminescent materials
-
- 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
- C09K11/88—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing selenium, tellurium or unspecified chalcogen elements
- C09K11/881—Chalcogenides
- C09K11/883—Chalcogenides with zinc or cadmium
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J2531/00—Additional information regarding catalytic systems classified in B01J31/00
- B01J2531/40—Complexes comprising metals of Group IV (IVA or IVB) as the central metal
- B01J2531/44—Lead
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Nanotechnology (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Crystallography & Structural Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Manufacturing & Machinery (AREA)
- Life Sciences & Earth Sciences (AREA)
- Biophysics (AREA)
- Optics & Photonics (AREA)
- Composite Materials (AREA)
- Luminescent Compositions (AREA)
Abstract
本发明公开了一种复合纳米结构及其制备方法,该复合纳米结构包括有机‑无机杂化钙钛矿纳米晶,和嵌入该有机‑无机杂化钙钛矿纳米晶内的半导体量子点;有机‑无机杂化钙钛矿纳米晶的结构式为CH3NH3PbX3,X选自Cl、Br或I。制备方法包括:将卤化铅与有机溶剂A混合均匀,得到溶液Ⅰ;将甲基卤化铵与有机溶剂B混合均匀,得到溶液Ⅱ;将半导体量子点加入溶液Ⅱ中,再加入配体,分散均匀后,得到混合溶液;再将混合溶液与溶液Ⅰ混合,经反应后得到复合纳米结构。本发明经工艺优化制备得到的复合纳米结构可提高光生电子和空穴的扩散距离,抑制电子和空穴半导体量子点表面的复合,可广泛用于太阳能电池及光催化等领域。
Description
技术领域
本发明涉及纳米功能材料的技术领域,尤其涉及一种复合纳米结构及其制备方法。
背景技术
量子点(quantum dots)又称为半导体纳米晶体,其三维尺寸均小于其波尔激子半径,一般是2~20nm。现在主要的量子点是传统的II–VI族元素,II–VI族半导体量子点,随着尺寸变化,可调整在可见光区的发射光范围,具有高量子效率。II–VI族半导体量子点优点明显,制备方法简单,激发光谱可覆盖整个可见光区,半高宽窄,稳定等,成为量子点领域中的研究热点之一。但II–VI族半导体量子点限于其尺寸影响(2~10nm),表面缺陷严重,加剧了电子、空穴的复合,不利于电子和空穴的有效分离。因此,如何提高量子点的荧光效率和稳定性成为大家关注的方向,其中多级结构和复合结构研究成为一种可行的方法。
钙钛矿材料随着其禁带宽度小、对光捕获能力和光生载流子的传输性能优越,在太阳能电池等领域上有着特别广泛的应用。目前,已经有将钙钛矿材料与半导体量子点复合的报道。
如申请公布号为CN 105417504 A的中国专利文献中公布了一种卤化铯铅与量子点复合材料的制备方法及所得产品。该制备方法包括:将卤化铅和十八烯混合,搅拌一段时间,然后加入油胺和油酸,搅拌至卤化铅完全溶解;卤化铅完全溶解后加热至130~200℃,先将量子点加入溶液中,再将铯前驱体溶液以一定的注射速度注入,反应一定时间后取出产物,得到复合材料。
该技术方案采用全无机钙钛矿卤化铯铅与半导体量子点进行复合,制备复合材料的微观形貌为花状,花状结构的中心为一个量子点,卤化铯铅纳米棒自组装为三维花状结构,每根纳米棒作为花状结构的花瓣,纳米棒一端均与量子点相连。
发明内容
本发明公开了一种复合纳米结构及其制备方法,经制备工艺的优化制备得到的复合纳米结构可提高光生电子和空穴的扩散距离,抑制电子和空穴半导体量子点表面的复合,可广泛用于太阳能电池及光催化等领域。
具体技术方案如下:
一种复合复合纳米结构,包括有机-无机杂化钙钛矿纳米晶,和嵌入所述有机-无机杂化钙钛矿纳米晶内的半导体量子点;
所述有机-无机杂化钙钛矿纳米晶的结构式为CH3NH3PbX3,X选自Cl、Br或I。
该复合纳米结构中,有机-无机杂化钙钛矿纳米晶在外,半导体量子点被包覆在有机-无机杂化钙钛矿纳米晶内。
本发明首次提出了一种结构与组成新颖的复合纳米结构,将半导体量子点嵌入有机-无机杂化钙钛矿纳米晶内。该结构更利于将电子传输至钙钛矿表面,抑制电子和空穴的复合,从而实现光生电子和空穴的有效分离。因此,不仅具有量子点材料的优良性能,如量子效应、表面效应等;而且还具有更好的优点,如载流子扩散距离长,结构稳定性好。
优选地,所述半导体量子点为II–VI族量子点,如CdTe、CdSe、CdSexTe1-x、ZnSe、ZnSe/ZnS、CdS、CdSe/ZnS、CdS/ZnS、CdTe/ZnS、CdSe/ZnSe、CdS/ZnSe、CdTe/ZnSe、CdSe/CdS、CdTe/CdS、CdS/ZnxCd1-xS、ZnSe/ZnxCd1-xS、CdSe/ZnxCd1-xS、CdTe/ZnxCd1-xS、ZnSe/CdS/ZnS、CdSe/CdS/ZnS、CdTe/CdS/ZnS,其中0<x<1。
所述半导体量子点直接作为原料使用,其制备可采用现有方法,优选地,采用水相法制备,该制备方法具有反应条件温和、成本低、污染小等优点,是目前最常见的制备工艺。
优选地,所述半导体量子点的粒径为2~10nm。
所述有机-无机杂化钙钛矿纳米晶呈团簇状。
本发明还公开了所述复合纳米结构的制备方法,包括:
(1)将卤化铅与有机溶剂A混合均匀,得到溶液Ⅰ;
(2)将甲基卤化铵与有机溶剂B混合均匀,得到溶液Ⅱ;
(3)将半导体量子点加入步骤(2)制备的溶液Ⅱ中,再加入配体,分散均匀后,得到混合溶液;
所述配体选自碳数为8~18的脂肪酸和/或碳数为8~18的脂肪胺;
(4)将步骤(3)制备的混合溶液与步骤(1)制备的溶液Ⅰ混合,经反应后得到所述复合纳米结构。
本发明采用有机相合成法,通过对制备工艺进行优化,保证最终制备的复合纳米结构中半导体量子点的均匀分散。
经对比试验发现,若直接将各原料一次性共混,获得的产品中两种结构不会呈包覆结构,而是简单的混合物。
优选地,步骤(1)中:
所述有机溶剂A选自非极性溶剂,如本领域常见的甲苯、环己烷、丙酮等;
所述溶液Ⅰ中卤化铅的浓度为0.1~0.5mol/L。
步骤(2)中:
所述甲基卤化铵选自甲基氯化铵、甲基溴化铵或甲基碘化铵;
所述有机溶剂B选自极性溶剂,如本领域常见的N,N-二甲基甲酰胺、二甲基亚砜等;
所述溶液Ⅱ中甲胺基离子的浓度为0.5~1mol/L。
步骤(3)中:
所述半导体量子点与所述溶液Ⅱ的摩尔体积比为0.5~4mol/L;
所述配体选自碳数为8~18的脂肪酸和碳数为8~18的脂肪胺;
所述半导体量子点、脂肪酸和脂肪胺的摩尔比为1:0.2~0.4:0.1~0.2。
进一步优选,所述配体选自油酸和油胺。
步骤(4)中,所述混合溶液与所述溶液Ⅰ的体积比为1:2~5。
与现有技术相比,本发明的有益效果在于:
本发明采用有机相合成法,通过制备工艺的优化,保证了半导体量子点在原位制备的有机-无机杂化钙钛矿纳米晶内的均匀分布,制备得到的复合纳米结构的载流子扩散距离更长,结构稳定性更好,可广泛用于太阳能电池及光催化等领域。
附图说明
图1为实施例1制备的CdSeTe量子点-CH3NH3PbBr3钙钛矿复合结构材料的XRD图谱;
图2为实施例1制备的CdSeTe量子点-CH3NH3PbBr3钙钛矿复合结构材料的TEM图。
具体实施方式
下面结合实施例对本发明作进一步详细的描述,但本发明的实施方式不限于此。
实施例1
(1)水相法制备CdSeTe量子点:以硼氢化钠、硒粉、碲粉、Cd(NO3)2为原料,以巯基乙酸为稳定剂,在氮气气氛中,制备CdSeTe量子点胶体溶液,在反应得到的澄清透明溶液中,加入同体积的丙酮,离心得到CdSeTe粉末样品,组成为CdSe0.25Te0.75;
(2)取367mg PbBr2溶解在5mL甲苯中,80℃溶解30min,使其充分溶解,得到溶液Ⅰ;
(3)取56mg甲基溴化铵(CAS号为6876-37-5)溶入1mL DMF(N,N-二甲基甲酰胺)中,搅拌至其完全溶解,得到溶液Ⅱ;
(4)取210mg的CdSeTe(0.92mmol)量子点粉末,加入步骤(3)的溶液Ⅱ中,并加入0.1mL(0.315mmol)油酸和0.05mL(0.15mmol)油胺,超声反应30min,得到混合溶液;
(5)将混合溶液加入到溶液Ⅰ中,体积比为1:5,磁力搅拌5min;
(6)反应后将反应液离心、分离、洗涤,得到CdSeTe量子点-CH3NH3PbBr3钙钛矿复合结构;
图1为实施例1制备的CdSeTe量子点-CH3NH3PbBr3钙钛矿复合结构材料的XRD图谱,观察XRD图谱可确认,产物组成为CdSe0.25Te0.75-CH3NH3PbBr3,鉴于量子点尺寸较小,XRD中衍射峰发生宽化,且强度较弱,因此其衍射峰被钙钛矿的衍射峰所覆盖。
图2为实施例1制备的CdSeTe量子点-CH3NH3PbBr3钙钛矿复合结构材料的TEM图,由图见,量子点成功地嵌入了有机无机杂化钙钛矿中,其中,CH3NH3PbBr3钙钛矿呈团簇状。
对比例1
(1)采用实施例1步骤(1)制备的CdSeTe粉末样品;
(2)367mg PbBr2、56mg甲基溴化铵溶入1mL DMF(N,N-二甲基甲酰胺),搅拌至其完全溶解,得到溶液Ⅰ;
(3)取210mg的CdSeTe量子点粉末,加入步骤(2)的溶液Ⅰ中,并加入0.1mL油酸和0.05mL油胺,超声反应30min,得到溶液Ⅱ;
(4)将步骤(3)的溶液Ⅱ加入至甲苯中,两者的体积比为1:5,磁力搅拌5min;
(5)反应后将反应液离心、分离、洗涤,得到产物。
经测试,制备得到的产物不具备包覆结构,仅为CdSeTe量子点与CH3NH3PbBr3钙钛矿纳米晶的共混物,在透射电镜下,只可观察到钙钛矿纳米晶和CdSeTe量子点的单独形貌。
实施例2
(1)水相法制备CdSe量子点:以硼氢化钠、硒粉、Cd(NO3)2为原料,以巯基乙酸为稳定剂,在氮气气氛中,制备CdSe量子点胶体溶液,在反应得到的澄清透明溶液中,加入同体积的丙酮,离心得到CdSe粉末样品;
(2)367mg PbBr2溶解在5mL甲苯中,80℃溶解30min,使其充分溶解,得到溶液Ⅰ;
(3)56mg甲基溴化铵溶入1mL DMF(N,N-二甲基甲酰胺),搅拌至其完全溶解,得到溶液Ⅱ;
(4)取191mg的CdSe量子点粉末,加入步骤(3)的溶液Ⅱ中,并加入0.1mL油酸和0.05mL油胺,超声反应30min,得到混合溶液;
(5)将混合溶液加入到溶液Ⅰ中,两者体积比为1:5,磁力搅拌5min;
(6)反应后将反应液离心、分离、洗涤,得到CdSe量子点-CH3NH3PbBr3钙钛矿复合结构。
实施例3
(1)水相法制备CdTe量子点:以硼氢化钠、碲粉、Cd(NO3)2为原料,以巯基乙酸为稳定剂,在氮气气氛中,制备CdTe量子点胶体溶液,在反应得到的澄清透明溶液中,加入同体积的丙酮,离心得到CdTe粉末样品;
(2)367mg PbBr2溶解在5mL甲苯中,80℃溶解30min,使其充分溶解,得到溶液Ⅰ;
(3)56mg甲基溴化铵溶入1mL DMF(N,N-二甲基甲酰胺),搅拌至其完全溶解,得到溶液Ⅱ;
(4)取230mg的CdTe量子点粉末,加入步骤(3)的溶液中,并加入0.1mL油酸和0.05mL油胺,超声反应30min,得到混合溶液;
(5)将混合溶液加入到溶液Ⅰ中,两者体积比为1:5,磁力搅拌5min;
(6)反应后将反应液离心、分离、洗涤,得到CdTe量子点-CH3NH3PbBr3钙钛矿复合结构。
Claims (3)
1.一种复合纳米结构的制备方法,其特征在于,包括:
(1)水相法制备CdSeTe量子点:以硼氢化钠、硒粉、碲粉、Cd(NO3)2为原料,以巯基乙酸为稳定剂,在氮气气氛中,制备CdSeTe量子点胶体溶液,在反应得到的澄清透明溶液中,加入同体积的丙酮,离心得到CdSeTe粉末样品,组成为CdSe0.25Te0.75;
(2)取367mg PbBr2溶解在5mL甲苯中,80℃溶解30min,使其充分溶解,得到溶液Ⅰ;
(3)取56mg甲基溴化铵溶入1mL N,N-二甲基甲酰胺中,搅拌至其完全溶解,得到溶液Ⅱ;
(4)取210mg的CdSeTe量子点粉末,加入步骤(3)的溶液Ⅱ中,并加入0.1mL油酸和0.05mL油胺,超声反应30min,得到混合溶液;
(5)将混合溶液加入到溶液Ⅰ中,体积比为1:5,磁力搅拌5min;
(6)反应后将反应液离心、分离、洗涤,得到CdSeTe量子点-CH3NH3PbBr3钙钛矿复合结构。
2.一种复合纳米结构的制备方法,其特征在于,包括:
(1)水相法制备CdSe量子点:以硼氢化钠、硒粉、Cd(NO3)2为原料,以巯基乙酸为稳定剂,在氮气气氛中,制备CdSe量子点胶体溶液,在反应得到的澄清透明溶液中,加入同体积的丙酮,离心得到CdSe粉末样品;
(2)367mg PbBr2溶解在5mL甲苯中,80℃溶解30min,使其充分溶解,得到溶液Ⅰ;
(3)56mg甲基溴化铵溶入1mLN,N-二甲基甲酰胺,搅拌至其完全溶解,得到溶液Ⅱ;
(4)取191mg的CdSe量子点粉末,加入步骤(3)的溶液Ⅱ中,并加入0.1mL油酸和0.05mL油胺,超声反应30min,得到混合溶液;
(5)将混合溶液加入到溶液Ⅰ中,两者体积比为1:5,磁力搅拌5min;
(6)反应后将反应液离心、分离、洗涤,得到CdSe量子点-CH3NH3PbBr3钙钛矿复合结构。
3.一种复合纳米结构的制备方法,其特征在于,包括:
(1)水相法制备CdTe量子点:以硼氢化钠、碲粉、Cd(NO3)2为原料,以巯基乙酸为稳定剂,在氮气气氛中,制备CdTe量子点胶体溶液,在反应得到的澄清透明溶液中,加入同体积的丙酮,离心得到CdTe粉末样品;
(2)367mg PbBr2溶解在5mL甲苯中,80℃溶解30min,使其充分溶解,得到溶液Ⅰ;
(3)56mg甲基溴化铵溶入1mL N,N-二甲基甲酰胺,搅拌至其完全溶解,得到溶液Ⅱ;
(4)取230mg的CdTe量子点粉末,加入步骤(3)的溶液中,并加入0.1mL油酸和0.05mL油胺,超声反应30min,得到混合溶液;
(5)将混合溶液加入到溶液Ⅰ中,两者体积比为1:5,磁力搅拌5min;
(6)反应后将反应液离心、分离、洗涤,得到CdTe量子点-CH3NH3PbBr3钙钛矿复合结构。
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201910397487.4A CN110184044B (zh) | 2019-05-14 | 2019-05-14 | 一种复合纳米结构及其制备方法 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201910397487.4A CN110184044B (zh) | 2019-05-14 | 2019-05-14 | 一种复合纳米结构及其制备方法 |
Publications (2)
Publication Number | Publication Date |
---|---|
CN110184044A CN110184044A (zh) | 2019-08-30 |
CN110184044B true CN110184044B (zh) | 2020-08-25 |
Family
ID=67716145
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN201910397487.4A Active CN110184044B (zh) | 2019-05-14 | 2019-05-14 | 一种复合纳米结构及其制备方法 |
Country Status (1)
Country | Link |
---|---|
CN (1) | CN110184044B (zh) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN112480927B (zh) * | 2019-09-12 | 2023-02-10 | 纳晶科技股份有限公司 | 一种量子点复合材料及其制备方法 |
CN112877059B (zh) * | 2021-01-20 | 2023-08-22 | 深圳技术大学 | 一种长荧光寿命MAPbBr3钙钛矿纳米晶的制备方法和光催化降解有机污染物的方法 |
CN114517092B (zh) * | 2022-01-24 | 2023-06-23 | 南京信息工程大学 | 一种CSPbBr3钙钛矿量子点及其制备方法 |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2016109902A2 (en) * | 2015-01-05 | 2016-07-14 | The Governing Council Of The University Of Toronto | Quantum-dot-in-perovskite solids |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN105609643B (zh) * | 2015-12-21 | 2017-12-05 | 永春新盛环保科技有限公司 | 一种钙钛矿型太阳能电池及制备方法 |
CN105576150B (zh) * | 2015-12-22 | 2017-12-19 | 成都新柯力化工科技有限公司 | 一种量子点尺寸梯度变化的钙钛矿型太阳能电池及制备方法 |
CN105417504B (zh) * | 2015-12-23 | 2017-07-28 | 济南大学 | 一种卤化铯铅与量子点复合材料的制备方法及所得产品 |
CN107099290A (zh) * | 2017-07-05 | 2017-08-29 | 向爱双 | 制备核壳结构钙钛矿量子点的方法 |
CN107474823A (zh) * | 2017-07-14 | 2017-12-15 | 上海大学 | 具有核壳结构钙钛矿纳米晶材料及其制备方法 |
-
2019
- 2019-05-14 CN CN201910397487.4A patent/CN110184044B/zh active Active
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2016109902A2 (en) * | 2015-01-05 | 2016-07-14 | The Governing Council Of The University Of Toronto | Quantum-dot-in-perovskite solids |
Also Published As
Publication number | Publication date |
---|---|
CN110184044A (zh) | 2019-08-30 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CN110184044B (zh) | 一种复合纳米结构及其制备方法 | |
EP2171016B1 (en) | Nanoparticles | |
US20150315721A1 (en) | One step synthesis of core/shell nanocrystal quantum dots | |
CN108217718A (zh) | 一种abx3钙钛矿纳米晶的合成方法及其产品和用途 | |
CN108531172B (zh) | 一种杂化钙钛矿微晶发光材料的制备方法及其应用 | |
CN112480912A (zh) | 一种钠铟基双钙钛矿纳米晶体材料及其制备和应用 | |
JP2016539908A (ja) | 分子クラスタ化合物からの金属酸化物ナノ粒子の合成 | |
CN110386886B (zh) | 快速、高效且通用的交换胶体纳米晶体表面配体的方法 | |
Xiong et al. | A solvent-reduction and surface-modification technique to morphology control of tetragonal In 2 S 3 nanocrystals | |
EP3858948B1 (en) | Quantum dot | |
CN111057542A (zh) | 一种室温水乳液法制备CsPbX3钙钛矿量子点的方法 | |
CN112480913A (zh) | 一种银钠混合双钙钛矿合金纳米晶体材料及其制备和应用 | |
CN114836209A (zh) | 一种卤化物钙钛矿纳米晶、其复合材料、及制备方法和应用 | |
JP7104170B2 (ja) | 量子ドットの製造方法 | |
CN115433575B (zh) | 一种CsPbX3纳米晶材料的制备方法 | |
CN108531163B (zh) | 一种高量子产率蓝光钙钛矿胶体量子点材料及合成方法 | |
JP4596705B2 (ja) | 複合微細粒子およびその製造方法 | |
Sana et al. | Luminescence and morphological kinetics of functionalized ZnS colloidal nanocrystals | |
WO2021129693A1 (zh) | 一种油溶性量子点的后处理方法 | |
CN111710745B (zh) | 一种锰掺杂纯无机钙钛矿-Au纳米晶异质结及其制备方法和应用 | |
CN114906872A (zh) | 一种稳定分散的全无机CsPbBr3钙钛矿纳米棒的制备方法 | |
Yang et al. | Photoluminescent Enhancement of CdSe/Cd1− x Zn x S Quantum Dots by Hexadecylamine at Room Temperature | |
CN115403067B (zh) | 一种提高混合卤素钙钛矿稳定性的方法 | |
CN114746364A (zh) | 核壳型量子点及核壳型量子点的制造方法 | |
CN113122224A (zh) | 核壳结构的量子点及其制备方法和应用 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PB01 | Publication | ||
PB01 | Publication | ||
SE01 | Entry into force of request for substantive examination | ||
SE01 | Entry into force of request for substantive examination | ||
GR01 | Patent grant | ||
GR01 | Patent grant |