CN109852387A - One kind passing through doping Ce4+Ion regulation CsPbBr3The method of perovskite quantum dot size pattern and luminescence generated by light - Google Patents
One kind passing through doping Ce4+Ion regulation CsPbBr3The method of perovskite quantum dot size pattern and luminescence generated by light Download PDFInfo
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Abstract
The present invention provides one kind to pass through doping Ce4+Ion regulation CsPbBr3The method of perovskite quantum dot size pattern and luminescence generated by light.The present invention is by the way of introducing ammonium ceric nitrate-oleic acid solutions during the preparation process, by Ce4+Ion doping hinders CsPbBr3The crystallization process of perovskite quantum dot, by CsPbBr3Quantum dot is converted to spherical shape by regular cube shape, and luminescence generated by light becomes blue-green bi-coloured light from green light；Utilize Ce4+Interaction between ammonium hydroxide, using AMMONIA TREATMENT spherical shape Ce4+Adulterate CsPbBr3Quantum dot, make its pattern be further converted to grow by spherical shape it is cube shaped；By means of the difference of ammonia concn, the intensity modulation in photoluminescent process to blue-green bi-coloured light is realized.Raw material needed for the present invention is cheap and easy to get, and synthesizer is simple, mild condition, and safe operation is simple and direct.
Description
Technical field
The present invention relates to one kind to pass through doping Ce4+Ion regulation CsPbBr3Perovskite quantum dot size pattern and photic hair
The method of light, belongs to technical field of nano material.
Background technique
Lead halide perovskite quantum dot is a kind of emerging semiconductor nano material, the good, wave with luminescence generated by light monochromaticjty
Section can reconcile the series of advantages such as quantum efficiency height, in the fields exhibition such as light emitting diode, solar battery and photodetector
Reveal broad prospect of application.Studying at present more is CsPbBr3Perovskite quantum dot, usually by adjusting CsPbBr3Perovskite
The mode of quantum dot size pattern obtains a variety of monochromatic photoluminescent emissions in the entire visible light region of covering.
The scale topography regulation of lead halide perovskite quantum dot generallys use control temperature and changes the strategy of surface ligand
It realizes.Such as: Yang et al. has studied in detail reaction temperature to CsPbBr3Quantum dot shape and size influence (referring to:
J.Am.Chem.Soc.2015,137,16008)；Chinese patent document CN106905960A provides a kind of by changing at heat
Temperature is managed to change the size of full-inorganic perovskite quantum dot, to regulate and control the method for its emission wavelength；Pan et al. has studied table
Face ligand is to CsPbBr3Quantum dot pattern influence (referring to: ACS Nano 2016,10,7943).
Currently, regulating and controlling CsPbBr by way of doped metal ion3Perovskite quantum dot size pattern and photic hair
The report of light is less.Therefore, it develops one kind and CsPbBr is regulated and controled by doped metal ion3Perovskite quantum dot size pattern and
The method of luminescence generated by light be it is very necessary, have very big learning value and application prospect.
Summary of the invention
In view of the deficiencies of the prior art, the present invention provides one kind to pass through doping Ce4+Ion regulation CsPbBr3Perovskite amount
The method of sub- spot size pattern and luminescence generated by light.Raw material needed for the present invention is cheap and easy to get, and synthesizer is simple, mild condition, behaviour
It is simple and direct to make safety.
Technical scheme is as follows:
One kind passing through doping Ce4+Ion regulation CsPbBr3The method of perovskite quantum dot size pattern and luminescence generated by light, packet
Include that steps are as follows:
(1) under nitrogen atmosphere, cesium carbonate, oleic acid, octadecylene are uniformly mixed and are heated to 140-160 DEG C, stirring makes
Cesium carbonate is completely dissolved, and obtains Cs- oleate solution；
(2) under nitrogen atmosphere, lead bromide, octadecylene, oleyl amine, ammonium ceric nitrate-oleic acid solutions are uniformly mixed, are heated to
110-130 DEG C, stirring keeps lead bromide entirely molten；Continue to be heated to 140-160 DEG C, the Cs- oleate that rapid injection step (1) obtains
Solution reacts 5-30 seconds, is cooled to room temperature；By reaction mixture centrifugation, purification, spherical Ce is obtained4+Adulterate CsPbBr3Quantum
Point；
(3) the spherical Ce for obtaining step (2)4+Adulterate CsPbBr3Quantum dot with the concentration of 4-6mg/mL be dispersed in just oneself
In alkane, ammonia spirit is added dropwise thereto and acutely shakes 25-35 seconds, reaction mixture centrifugation, purification obtain growing cube shaped
Ce4+Adulterate CsPbBr3Quantum dot.
, according to the invention it is preferred to, the molar ratio of cesium carbonate described in step (1) and oleic acid is 1:3-3.5；Described
The volume ratio of oleic acid and octadecylene is 1:10-20, further preferred 1:16.
, according to the invention it is preferred to, heating temperature described in step (1) is 150 DEG C.
According to the present invention, Cs- oleate solution described in step (1) can be cooled to room temperature preservation, and when use is added
Heat is to 30-60 DEG C, and preferably 40 DEG C.
, according to the invention it is preferred to, in ammonium ceric nitrate-oleic acid solutions described in step (2), the quality of ammonium ceric nitrate is dense
Degree is 0.08-0.12g/mL, further preferred 0.1g/mL.
According to the present invention, ammonium ceric nitrate-oleic acid solutions described in step (2) are that ammonium ceric nitrate is dissolved in oleic acid in advance
Obtained in.
, according to the invention it is preferred to, the molar ratio of lead bromide described in step (2) and oleyl amine is 1:7-9；The oil
The ratio between volume of amine, ammonium ceric nitrate-oleic acid solutions and octadecylene is 1:1:8-12.
, according to the invention it is preferred to, the additional amount of Cs- oleate solution described in step (2) is according to cesium carbonate and bromine
The molar ratio for changing lead is 1:7-8.
, according to the invention it is preferred to, cooling described in step (2) is cooling using ice-water bath.
, according to the invention it is preferred to, purification step described in step (2) are as follows: be dispersed in the product that centrifugation obtains just
In hexane, it is centrifuged 10min at 3,000 rpm, in triplicate.
, according to the invention it is preferred to, the concentration of ammonia spirit described in step (3) is 0.1-12mol/L.
, according to the invention it is preferred to, spherical Ce described in step (3)4+Adulterate CsPbBr3In quantum dot and ammonia spirit
NH3Mass ratio be 1:0.04-4.1.
, according to the invention it is preferred to, purification step described in step (3) are as follows: be dispersed in the product that centrifugation obtains just
In hexane, it is centrifuged 10min at 3,000 rpm, in triplicate.
It technical characterstic of the invention and has the beneficial effect that:
1, the present invention can be used for preparing spherical Ce4+Adulterate CsPbBr3Quantum dot；Ce4+Doping can hinder CsPbBr3Quantum dot
Crystallization process, so that its pattern is become spherical from positive cubic crystal, and size becomes smaller, luminescence generated by light is by the good green light of monochromaticjty
It is changed into blue-green bi-coloured light.
2, with AMMONIA TREATMENT spherical shape Ce4+Adulterate CsPbBr3Quantum dot can make product morphology become growing from spherical shape it is cube shaped,
And it becomes large-sized；The double-colored luminous intensity of the blue-green of luminescence generated by light can be adjusted by way of controlling ammonia concn.
3, raw material needed for method of the invention is cheap and easy to get, and synthesizer is simple, and mild condition, safe operation is simple and direct, real
Now to CsPbBr3The regulation of perovskite quantum dot size pattern and luminescence generated by light, and the quantum dot being prepared display,
Illumination, laser and other photovoltaic applications fields are with a wide range of applications.
Detailed description of the invention
Fig. 1 is spherical Ce prepared by embodiment 14+Adulterate CsPbBr3The transmission electron microscope photo of quantum dot.
Fig. 2 is spherical Ce prepared by embodiment 14+Adulterate CsPbBr3The uv-visible absorption spectroscopy figure of quantum dot.
Fig. 3 is the cube shaped Ce of length prepared by embodiment 14+Adulterate CsPbBr3The transmission electron microscope photo of quantum dot.
Fig. 4 is the cube shaped Ce of length prepared by embodiment 14+Adulterate CsPbBr3The uv-visible absorption spectroscopy of quantum dot
Figure.
Fig. 5 is spherical Ce prepared by embodiment 14+Adulterate CsPbBr3Quantum dot and the length of embodiment 1-7 preparation are cube shaped
Ce4+Adulterate CsPbBr3The photoluminescence spectra figure of quantum dot, wherein a is spherical Ce prepared by embodiment 14+Adulterate CsPbBr3Amount
The photoluminescence spectra figure of son point, b are the cube shaped Ce of length prepared by embodiment 14+Adulterate CsPbBr3The luminescence generated by light of quantum dot
Spectrogram, c are the cube shaped Ce of length prepared by embodiment 24+Adulterate CsPbBr3The photoluminescence spectra figure of quantum dot, d are to implement
The cube shaped Ce of length prepared by example 34+Adulterate CsPbBr3The photoluminescence spectra figure of quantum dot, e are that length prepared by embodiment 4 is vertical
Cube shape Ce4+Adulterate CsPbBr3The photoluminescence spectra figure of quantum dot, f are the cube shaped Ce of length prepared by embodiment 54+Doping
CsPbBr3The photoluminescence spectra figure of quantum dot, g are the cube shaped Ce of length prepared by embodiment 64+Adulterate CsPbBr3Quantum dot
Photoluminescence spectra figure, h be embodiment 7 prepare the cube shaped Ce of length4+Adulterate CsPbBr3The photoluminescence spectra of quantum dot
Figure.
Fig. 6 is regular cube shape CsPbBr prepared by comparative example 13The transmission electron microscope photo of quantum dot.
Fig. 7 is regular cube shape CsPbBr prepared by comparative example 13The photoluminescence spectra figure and ultraviolet-visible of quantum dot
Optical absorption spectra figure.
Fig. 8 is spherical Ce prepared by embodiment 14+Adulterate CsPbBr3Quantum dot and long cube shaped Ce4+Adulterate CsPbBr3
Regular cube shape CsPbBr prepared by quantum dot and comparative example 13The EDS of quantum dot schemes, wherein (a) is prepared by comparative example 1
Regular cube shape CsPbBr3The EDS of quantum dot schemes, (b) the spherical Ce prepared for embodiment 14+Adulterate CsPbBr3Quantum dot
EDS figure, (c) the cube shaped Ce of length prepared for embodiment 14+Adulterate CsPbBr3The EDS of quantum dot schemes.
Specific embodiment
The present invention is further explained in the light of specific embodiments, but not limited to this.
Experimental method described in embodiments following simultaneously is unless otherwise specified conventional method；The reagent and material
Material, unless otherwise specified, commercially obtains.
The density of oleic acid used in embodiment is 0.89g/mL (25 DEG C), and the density of oleyl amine used is 0.813g/mL (25
℃)。
The transmission electron microscope photo of product is to be acquired to obtain by Tecnai G2F30 transmission electron microscope in embodiment, photic
Luminescent spectrum is acquired by WGY-10 type sepectrophotofluorometer and is obtained, and uv-visible absorption spectroscopy is ultraviolet by TU-1901 series
Visible spectrophotometer acquisition obtains.
Embodiment 1
One kind passing through doping Ce4+Ion regulation CsPbBr3The method of perovskite quantum dot size pattern and luminescence generated by light, packet
Include that steps are as follows:
(1) under nitrogen atmosphere, 100mL three-necked flask is added in cesium carbonate 0.814g, oleic acid 2.5mL, octadecylene 40mL
In, it is uniformly mixed, is heated to 150 DEG C, is completely dissolved cesium carbonate powder, obtain Cs- oleate solution；
(2) under nitrogen atmosphere, 0.05g ammonium ceric nitrate is dissolved in 0.5mL oleic acid, it is molten obtains ammonium ceric nitrate-oleic acid
Liquid；Lead bromide 0.069g, octadecylene 5mL, oleyl amine 0.5mL and above-mentioned ammonium ceric nitrate-oleic acid solutions are distinguished under nitrogen atmosphere
25mL three-necked flask is added to be uniformly mixed, is heated to 120 DEG C, stirring to lead bromide is all dissolved；Continue to be heated to 150 DEG C, it is fast
The Cs- oleate solution that speed injection 0.4mL step (1) obtains；After reaction 5 seconds, reaction mixture is cooled to room with ice-water bath
Temperature is centrifuged 10min at 3,000 rpm, and the product that centrifugation obtains is dispersed in n-hexane, is centrifuged 10min at 3,000 rpm,
In triplicate, spherical Ce is obtained4+Adulterate CsPbBr3Quantum dot；
(3) the spherical Ce for obtaining step (2)4+Adulterate CsPbBr3Quantum dot is dispersed in n-hexane with the concentration of 5mg/mL
In, dispersion liquid is obtained, 100 μ L 1.2mol/L ammonia spirits are added dropwise into the above-mentioned dispersion liquid of 1mL, acutely concussion 30 seconds；By gained
Reaction mixture is centrifuged 10min at 3,000 rpm, in triplicate, must grow cube shaped Ce4+Adulterate CsPbBr3Quantum dot.
Spherical shape Ce manufactured in the present embodiment4+Adulterate CsPbBr3The transmission electron microscope photo of quantum dot is as shown in Figure 1, from Fig. 1
It can be seen that gained Ce4+Adulterate CsPbBr3Quantum dot is the spherical nanoparticle of monodisperse status, partial size 5nm.
Spherical shape Ce manufactured in the present embodiment4+Adulterate CsPbBr3Uv-visible absorption spectroscopy figure such as Fig. 2 institute of quantum dot
Show, from figure 2 it can be seen that there are two ultraviolet absorption peaks for the quantum dot, is located at 432 and 461nm.
Spherical shape Ce manufactured in the present embodiment4+Adulterate CsPbBr3The EDS of quantum dot schemes as shown in figure 8, each element ratio such as table
Shown in 1.From Fig. 8 and table 1 as can be seen that prepared CsPbBr3Quantum dot contains Cs, Pb, Br, Ce element, Ce4+Ion success
It is entrained in CsPbBr3In quantum dot.
Table 1
The cube shaped Ce of length manufactured in the present embodiment4+Adulterate CsPbBr3The transmission electron microscope photo of quantum dot as shown in figure 3,
From figure 3, it can be seen that products therefrom is that length is cube shaped, having a size of (70 ± 10nm) × 12nm.
The cube shaped Ce of length manufactured in the present embodiment4+Adulterate CsPbBr3The uv-visible absorption spectroscopy of quantum dot is as schemed
Shown in 4, figure 4, it is seen that there are two ultraviolet absorption peaks for the quantum dot, it is located at 461 and 515nm.
The cube shaped Ce of length manufactured in the present embodiment4+Adulterate CsPbBr3The EDS of quantum dot schemes as shown in figure 8, each element ratio
Such as shown in table 2.As can be seen that prepared CsPbBr from Fig. 8 and table 23Quantum dot contains Cs, Pb, Br, Ce element, Ce4+
Ion is successfully entrained in CsPbBr3In quantum dot.
Table 2
Spherical shape Ce manufactured in the present embodiment4+Adulterate CsPbBr3Quantum dot and long cube shaped Ce4+Adulterate CsPbBr3Quantum
The photoluminescence spectra figure of point is as shown in figure 5, from figure 5 it can be seen that prepared spherical Ce4+Adulterate CsPbBr3Quantum dot
There are two fluorescence emission peaks, are located at 468 and 514nm, long cube shaped Ce4+Adulterate CsPbBr3Only one is glimmering for quantum dot
Light emitting peak is located at 520nm.
Embodiment 2
One kind passing through doping Ce4+Ion regulation CsPbBr3The method of perovskite quantum dot size pattern and luminescence generated by light, such as
Described in embodiment 1, the difference is that the concentration of ammonia spirit is 0.12mol/L.
The cube shaped Ce of length manufactured in the present embodiment4+Adulterate CsPbBr3Photoluminescence spectra figure such as Fig. 5 institute of quantum dot
Show, from figure 5 it can be seen that there are two fluorescence emission peaks for products therefrom tool, is located at 468 and 515nm, intensity is different from
Embodiment 1.
Embodiment 3
One kind passing through doping Ce4+Ion regulation CsPbBr3The method of perovskite quantum dot size pattern and luminescence generated by light, such as
Described in embodiment 1, the difference is that the concentration of ammonia spirit is 0.24mol/L.
The cube shaped Ce of length manufactured in the present embodiment4+Adulterate CsPbBr3Photoluminescence spectra figure such as Fig. 5 institute of quantum dot
Show, from figure 5 it can be seen that there are two fluorescence emission peaks for products therefrom tool, is located at 468 and 515nm, intensity is different from
Examples 1 and 2.
Embodiment 4
One kind passing through doping Ce4+Ion regulation CsPbBr3The method of perovskite quantum dot size pattern and luminescence generated by light, such as
Described in embodiment 1, the difference is that the concentration of ammonia spirit is 0.60mol/L.
The cube shaped Ce of length manufactured in the present embodiment4+Adulterate CsPbBr3Photoluminescence spectra figure such as Fig. 5 institute of quantum dot
Show, from figure 5 it can be seen that there are two fluorescence emission peaks for products therefrom tool, is located at 468 and 515nm, intensity is different from
Embodiment 1-3.
Embodiment 5
One kind passing through doping Ce4+Ion regulation CsPbBr3The method of perovskite quantum dot size pattern and luminescence generated by light, such as
Described in embodiment 1, the difference is that the concentration of ammonia spirit is 1.0mol/L.
The cube shaped Ce of length manufactured in the present embodiment4+Adulterate CsPbBr3Photoluminescence spectra figure such as Fig. 5 institute of quantum dot
Show, from figure 5 it can be seen that there are two fluorescence emission peaks for products therefrom tool, is located at 466 and 512nm, intensity is different from
Embodiment 1-4.
Embodiment 6
One kind passing through doping Ce4+Ion regulation CsPbBr3The method of perovskite quantum dot size pattern and luminescence generated by light, such as
Described in embodiment 1, the difference is that the concentration of ammonia spirit is 2.4mol/L.
The cube shaped Ce of length manufactured in the present embodiment4+Adulterate CsPbBr3Photoluminescence spectra figure such as Fig. 5 institute of quantum dot
Show, from figure 5 it can be seen that products therefrom has a fluorescence emission peak, is located at 510nm, intensity is different from embodiment 1-
5。
Embodiment 7
One kind passing through doping Ce4+Ion regulation CsPbBr3The method of perovskite quantum dot size pattern and luminescence generated by light, such as
Described in embodiment 1, the difference is that the concentration of ammonia spirit is 12mol/L.
The cube shaped Ce of length manufactured in the present embodiment4+Adulterate CsPbBr3Photoluminescence spectra figure such as Fig. 5 institute of quantum dot
Show, from figure 5 it can be seen that products therefrom has a fluorescence emission peak, is located at 510nm, intensity is different from embodiment 1-
6。
Comparative example 1
A kind of regular cube shape CsPbBr3The preparation method of quantum dot, comprises the following steps that
(1) under nitrogen atmosphere, 100mL three-necked flask is added in cesium carbonate 0.814g, oleic acid 2.5mL, octadecylene 40mL
In, it is uniformly mixed, is heated to 150 DEG C, is completely dissolved cesium carbonate powder, obtain Cs- oleate solution；
(2) under nitrogen atmosphere, lead bromide 0.069g, octadecylene 5mL, oleyl amine 0.5mL and oleic acid 0.5mL are separately added into
It is uniformly mixed in 25mL three-necked flask, is heated to 120 DEG C, stirring to lead bromide is all dissolved；Continue to be heated to 150 DEG C, rapidly
The Cs- oleate solution that injection 0.4mL step (1) obtains；After reaction 5 seconds, reaction mixture is cooled to room temperature with ice-water bath,
It is centrifuged 10min at 3,000 rpm, the product that centrifugation obtains is dispersed in n-hexane, is centrifuged 10min at 3,000 rpm, repeats
Three times, regular cube shape CsPbBr is obtained3Quantum dot.
The regular cube shape CsPbBr of this comparative example preparation3The transmission electron microscope photo of quantum dot is as shown in fig. 6, from Fig. 6
As can be seen that gained CsPbBr3Quantum dot is positive cubic crystal, having a size of 10nm.
The regular cube shape CsPbBr of this comparative example preparation3The photoluminescence spectra figure and ultraviolet-visible light of quantum dot are inhaled
Spectrogram is received as shown in fig. 7, it can be seen from figure 7 that the CsPbBr of this comparative example preparation3The ultraviolet absorption peak of quantum dot is located at
505nm, fluorescence emission peak are located at 515nm.
The regular cube shape CsPbBr of this comparative example preparation3The EDS of quantum dot schemes as shown in figure 8, each element ratio such as table 3
It is shown.As can be seen that prepared CsPbBr from Fig. 8 and table 33Quantum dot contains Cs, Pb, Br element.
Table 3
It can be illustrated by the above experimental data, in CsPbBr3Ammonium ceric nitrate-oleic acid is introduced in the preparation process of quantum dot
Solution, using Ce4+Doping hinder perovskite crystalline process so that CsPbBr3The pattern of perovskite quantum dot is by just cube
The bodily form is converted into spherical shape, and size becomes smaller, and luminescence generated by light is converted into blue-green bi-coloured light by single green light；With AMMONIA TREATMENT spherical shape Ce4+
Adulterate CsPbBr3Quantum dot can make its pattern be further converted to grow by spherical shape cube shaped, become large-sized.Embodiment 1-7 is aobvious
Show, with the increase of ammonia concn, the resulting cube shaped Ce of length4+Adulterate CsPbBr3Quantum dot is located at the fluorescence near 468nm
Emission peak first become it is strong, after die down, finally disappear；Fluorescence emission peak near 520nm gradually increases and then dies down；Work as ammonium hydroxide
Concentration when being 1.2mol/L, long cube shaped Ce4+Adulterate CsPbBr3Fluorescence emission peak disappears at the 468nm of quantum dot, and
Fluorescence emission peak reaches most strong at 520nm；Long cube shaped Ce4+Adulterate CsPbBr3The double-colored luminescence generated by light mistake of the blue-green of quantum dot
The intensity of journey can be adjusted by way of controlling ammonia concn.
Claims (10)
1. one kind passes through doping Ce4+Ion regulation CsPbBr3The method of perovskite quantum dot size pattern and luminescence generated by light, including
Steps are as follows:
(1) under nitrogen atmosphere, cesium carbonate, oleic acid, octadecylene are uniformly mixed and are heated to 140-160 DEG C, stirring makes carbonic acid
Caesium is completely dissolved, and obtains Cs- oleate solution；
(2) under nitrogen atmosphere, lead bromide, octadecylene, oleyl amine and ammonium ceric nitrate-oleic acid solutions are uniformly mixed, are heated to
110-130 DEG C, stirring keeps lead bromide entirely molten；Continue to be heated to 140-160 DEG C, the Cs- oleate that rapid injection step (1) obtains
Solution reacts 5-30 seconds, is cooled to room temperature；By reaction mixture centrifugation, purification, spherical Ce is obtained4+Adulterate CsPbBr3Quantum
Point；
(3) the spherical Ce for obtaining step (2)4+Adulterate CsPbBr3Quantum dot is dispersed in n-hexane with the concentration of 4-6mg/mL,
Ammonia spirit is added dropwise thereto and acutely shakes 25-35 seconds, reaction mixture centrifugation, purification obtain growing cube shaped Ce4+It mixes
Miscellaneous CsPbBr3Quantum dot.
2. according to claim 1 by adulterating Ce4+Ion regulation CsPbBr3Perovskite quantum dot size pattern and photic
Luminous method, which is characterized in that the molar ratio of cesium carbonate described in step (1) and oleic acid is 1:3-3.5；The oleic acid
Volume ratio with octadecylene is 1:10-20, preferably 1:16.
3. according to claim 1 by adulterating Ce4+Ion regulation CsPbBr3Perovskite quantum dot size pattern and photic
Luminous method, which is characterized in that heating temperature described in step (1) is 150 DEG C.
4. according to claim 1 by adulterating Ce4+Ion regulation CsPbBr3Perovskite quantum dot size pattern and photic
Luminous method, which is characterized in that in ammonium ceric nitrate-oleic acid solutions described in step (2), the mass concentration of ammonium ceric nitrate is
0.08-0.12g/mL, preferably 0.1g/mL.
5. according to claim 1 by adulterating Ce4+Ion regulation CsPbBr3Perovskite quantum dot size pattern and photic
Luminous method, which is characterized in that the molar ratio of lead bromide described in step (2) and oleyl amine is 1:7-9；The oleyl amine,
The ratio between ammonium ceric nitrate-oleic acid solutions and the volume of octadecylene are 1:1:8-12.
6. according to claim 1 by adulterating Ce4+Ion regulation CsPbBr3Perovskite quantum dot size pattern and photic
Luminous method, which is characterized in that the additional amount of Cs- oleate solution described in step (2) is according to cesium carbonate and lead bromide
Molar ratio be 1:7-8.
7. according to claim 1 by adulterating Ce4+Ion regulation CsPbBr3Perovskite quantum dot size pattern and photic
Luminous method, which is characterized in that cooling described in step (2) is cooling using ice-water bath.
8. according to claim 1 by adulterating Ce4+Ion regulation CsPbBr3Perovskite quantum dot size pattern and photic
Luminous method, which is characterized in that purification step described in step (2) are as follows: the product that centrifugation obtains is dispersed in n-hexane
In, it is centrifuged 10min at 3,000 rpm, in triplicate.
9. according to claim 1 by adulterating Ce4+Ion regulation CsPbBr3Perovskite quantum dot size pattern and photic
Luminous method, which is characterized in that the concentration of ammonia spirit described in step (3) is 0.1-12mol/L；The spherical shape
Ce4+Adulterate CsPbBr3NH in quantum dot and ammonia spirit3Mass ratio be 1:0.04-4.1.
10. according to claim 1 by adulterating Ce4+Ion regulation CsPbBr3Perovskite quantum dot size pattern and light
The method of photoluminescence, which is characterized in that purification step described in step (3) are as follows: will the obtained product of centrifugation be dispersed in just oneself
In alkane, it is centrifuged 10min at 3,000 rpm, in triplicate.
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| CN111205863A (en) * | 2020-01-17 | 2020-05-29 | 太原理工大学 | Method for preparing powdery rare earth-doped inorganic perovskite quantum dots at low temperature in vacuum |
| CN111286332A (en) * | 2020-04-03 | 2020-06-16 | 南开大学 | Rare earth-based multi-modal luminescent perovskite material and preparation method and application thereof |
| CN112582556A (en) * | 2019-09-30 | 2021-03-30 | Tcl集团股份有限公司 | Quantum dot light-emitting diode and preparation method thereof |
| CN112993178A (en) * | 2021-02-07 | 2021-06-18 | 凯里学院 | Light-emitting diode based on tin-doped cesium-lead-bromine quantum dots and preparation method thereof |
| CN113604220A (en) * | 2021-08-17 | 2021-11-05 | 东北电力大学 | Perovskite quantum dot material and preparation method and application thereof |
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