CN109971457A - A kind of perovskite quantum dot and preparation method thereof - Google Patents
A kind of perovskite quantum dot and preparation method thereof Download PDFInfo
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Abstract
The present invention discloses a kind of perovskite quantum dot and preparation method thereof, and method obtains caesium precursor liquid the following steps are included: under an inert atmosphere, cesium salt, organic phosphine, poor solvent and organic amine are uniformly mixed；Under an inert atmosphere, lead salt, organic phosphine, poor solvent and organic amine are uniformly mixed, obtain lead precursor liquid；Under an inert atmosphere, caesium precursor liquid and lead precursor liquid are uniformly mixed, the cesium ion, lead ion and the halide ion that dissolve out in mixing precursor liquid is made to carry out obtaining CsPbX at nuclear reaction3Perovskite quantum dot, the CsPbX3Perovskite quantum dot surface is combined with organic amine, and wherein X is Cl, Br or I；Wherein, at least one of the cesium salt and the lead salt are metal halide.The CsPbX of the method for the present invention synthesis3Microscopic appearance, the partial size of perovskite quanta point material are relatively uniform, and luminance purity is high, and stability is preferable between batch, conducive to the material in illumination, the application of photoelectric display, photovoltaic art.
Description
Technical field
The present invention relates to technology of quantum dots fields more particularly to a kind of perovskite quantum dot and preparation method thereof.
Background technique
Traditional photovoltaic material restricts always the development of photovoltaic industry and strengthens since cost is high, energy transformation ratio is low
Greatly.Recent study discovery, organic-inorganic metal halide perovskite material have phototransformation efficiency height, luminescent spectrum wide, empty
The advantages that cave-electronics recombination energy is small, carrier mobility rate is big has in photovoltaic industry, LED, optical communication and biologic medical field
Have broad application prospects.Compared with organic-inorganic metal halide perovskite material, full-inorganic metal halide perovskite material
More excellent stability is presented in material, has more wide application prospect.
Quanta point material is due to its exciting light spectrum width, the optical characteristics such as emission wavelength is adjustable, luminous efficiency is high, it is considered to be
The novel optoelectronic materials of great potential.The study found that the solar battery based on metal halide perovskite quanta point material
Phototransformation efficiency has bright application prospect up to 20 %.But metal halide perovskite quanta point material synthesis condition
Compare harsh, the bad phenomenon of stability, difference batch between the generally existing batch of perovskite quanta point material of prior art synthesis
The perovskite quanta point material of secondary preparation, the generally existing difference of luminous peak position, peak width, quantum efficiency, this restrict the materials
In illumination, the development and application of photoelectric display, photovoltaic art.In addition, in the prior art, the glow peak peak width of perovskite quantum is still
After having further narrowed possibility, glow peak to narrow, the luminance purity of material can be promoted significantly, corresponding photoelectric device
Performance also available certain promotion.
Therefore, novel synthetic method is explored, optimizes the lot stability of perovskite quantum dot, improve perovskite quantum dot
Luminance purity be CsPbX instantly3 The research hotspot in (X=Cl, Br, I) perovskite quantum dot field.
Summary of the invention
In view of above-mentioned deficiencies of the prior art, the purpose of the present invention is to provide a kind of perovskite quantum dot and its preparation sides
Method, it is intended to solve between the generally existing batch of perovskite quanta point material of prior art synthesis that stability is bad and perovskite amount
The luminance purity of son point material problem still to be improved.
Technical scheme is as follows:
A kind of preparation method of perovskite quantum dot, wherein the following steps are included:
Caesium precursor liquid containing cesium salt, organic phosphine, poor solvent and organic amine is provided；
Lead precursor liquid containing lead salt, organic phosphine, poor solvent and organic amine is provided；
The caesium precursor liquid and the lead precursor liquid are mixed, is reacted under the conditions of 150 DEG C ~ 250 DEG C, CsPbX is prepared3
Perovskite quantum dot, wherein X is Cl, Br or I.
A kind of perovskite quantum dot, wherein including CsPbX3Perovskite quantum dot, the CsPbX3Perovskite quantum dot table
Face is combined with organic amine ligand, and wherein X is Cl, Br or I.
The utility model has the advantages that the CsPbX of the method for the present invention synthesis3The microcosmic shape of (X=Cl, Br, I) perovskite quanta point material
Looks, partial size are relatively uniform, and luminance purity is high, and stability is preferable between batch, are conducive to the material in illumination, photoelectric display, photovoltaic
The application in field.
Detailed description of the invention
Fig. 1 is a kind of flow chart of the preparation method of perovskite quantum dot provided by the invention.
Specific embodiment
The present invention provides a kind of perovskite quantum dot and preparation method thereof, to make the purpose of the present invention, technical solution and effect
Fruit is clearer, clear, and the present invention is described in more detail below.It should be appreciated that specific embodiment described herein is only
Only to explain the present invention, it is not intended to limit the present invention.
Referring to Fig. 1, Fig. 1 is a kind of flow chart of the preparation method of perovskite quantum dot provided by the invention, as schemed institute
Show comprising following steps:
100, the caesium precursor liquid containing cesium salt, organic phosphine, poor solvent and organic amine is provided；
200, the lead precursor liquid containing lead salt, organic phosphine, poor solvent and organic amine is provided；
300, the caesium precursor liquid and the lead precursor liquid are mixed, CsPbX is prepared in heating3Perovskite quantum dot, wherein X
For Cl, Br or I.
The present invention is respectively caesium source, lead source using cesium salt, lead salt, and organic phosphine is the cosolvent in caesium source, lead salt, poor solvent
If long-chain olefin is solvent, organic amine is ligand, is prepared for CsPbX by solvent thermal process3Perovskite quantum dot (X=Cl,
Br, I).Specifically, during the preparation process, cesium ion, the lead ion, halide ion reaction nucleation dissolved out in precursor liquid, and
Under organic amine ligand protection, the CsPbX that surface is combined with organic amine ligand is finally obtained3(X=Cl, Br, I) perovskite amount
Son point material.Since the solubility of caesium source, lead source in poor solvent such as long-chain olefin solvent is smaller, crystal is in reaction system
In growth rate it is slow；And under the action of cosolvent, it is ensured that reaction smoothly forms crystal.Therefore, this method is closed
At CsPbX3The microscopic appearance, partial size of (X=Cl, Br, I) perovskite quanta point material are relatively uniform, and luminance purity is high, and
Stability is preferable between batch, conducive to the material in illumination, the application of photoelectric display, photovoltaic art.
In a kind of wherein embodiment, the cesium salt can be selected from metal halide such as cesium chloride, cesium bromide or iodate
Caesium, can also be without being limited thereto selected from cesium acetate or cesium carbonate etc..
In a kind of wherein embodiment, the lead salt can be selected from metal halide such as lead chloride, lead bromide or iodate
Lead, can also be without being limited thereto selected from lead acetate or ceruse etc..
Wherein, at least one of the cesium salt and the lead salt are metal halide.
In a kind of wherein embodiment, the organic phosphine can be selected from tributylphosphine, tri octyl phosphine, tributylphosphine oxide
Or trioctyl phosphine oxide etc. is without being limited thereto.
In a kind of wherein embodiment, the long-chain olefin that the poor solvent can be 9 ~ 19 selected from carbon atom number, such as
12 is dilute, 14 dilute or 18 is dilute etc..This is because carbochain is too short, boiling point is too low, is unfavorable for subsequent at nuclear reaction；And carbochain
It is too long, it is solid under room temperature, is unfavorable for operating.Most preferably, the poor solvent is 18 dilute.
In a kind of wherein embodiment, the organic amine can be isometric selected from lauryl amine, tetradecy lamine, octadecylamine or oleyl amine
Alkyl group amine.
In step 100, the caesium precursor liquid containing cesium salt, organic phosphine, poor solvent and organic amine is matched by the following method
It is made: under an inert atmosphere, cesium salt, organic phosphine, poor solvent and organic amine being mixed, and stirs evenly, obtain suspended shape
The caesium precursor liquid containing cesium salt, organic phosphine, poor solvent and organic amine of state.Due to organic phosphine, organic amine easily with the oxygen in air
Gas, carbon dioxide reaction, therefore the step need to carry out under an inert atmosphere, such as can choose and carry out in glove box.
In a kind of wherein embodiment, in the caesium precursor liquid containing cesium salt, organic phosphine, poor solvent and organic amine
In, it is 1:0.5 ~ 2 by the molar ratio of the cesium salt and organic phosphine, configuration is described to contain cesium salt, organic phosphine, poor solvent and organic amine
Caesium precursor liquid, this is because the free cesium ion dissolved out in caesium precursor liquid is less when cesium salt/organic phosphine ratio is excessive, after
Continuous reaction nucleation is difficult；And cesium salt/organic phosphine ratio it is too small when, the free cesium ion concentration dissolved out in caesium precursor liquid is excessive,
Subsequent reactions are rapid, are unfavorable for operating.
In a kind of wherein embodiment, in the caesium precursor liquid containing cesium salt, organic phosphine, poor solvent and organic amine
In, it is 1:50 ~ 200 by the molar ratio of the cesium salt and poor solvent, configuration is described to be contained cesium salt, organic phosphine, poor solvent and have
The caesium precursor liquid of machine amine, this is because the free cesium ion dissolved out in caesium precursor liquid is dense when cesium salt/poor solvent ratio is excessive
It spends greatly, subsequent reactions are rapid, are unfavorable for operating；And cesium salt/poor solvent ratio it is too small when, what is dissolved out in caesium precursor liquid is free
Cesium ion it is less, combined coefficient is low, is not easy to produce.
In a kind of wherein embodiment, in the caesium precursor liquid containing cesium salt, organic phosphine, poor solvent and organic amine
In, it is 1:1 ~ 5 by the molar ratio of the cesium salt and organic amine, configuration is described containing cesium salt, organic phosphine, poor solvent and organic amine
Caesium precursor liquid, this is because when cesium salt/organic amine ratio is excessive, passivation protection effect of organic amine ligand to perovskite quantum dot
It is bad；And cesium salt/organic amine ratio it is too small when, a large amount of organic amine ligands coat perovskite quantum dots, this can hinder photoelectric device
The injection of middle electronics influences the performance of device.
In a kind of wherein embodiment, the time of the stirring is 20 ~ 50 min, this is because mixing time is too short
When, the cesium ion concentration to dissociate in caesium precursor liquid is too low, is unfavorable for subsequent reactions nucleation；And mixing time it is too long when, cesium ion
Excessive concentration, subsequent reactions excessive velocities are unfavorable for operating.
In step 200, the lead precursor liquid containing lead salt, organic phosphine, poor solvent and organic amine is matched by the following method
It is made: under an inert atmosphere, lead salt, organic phosphine, poor solvent and organic amine being mixed, and stirs evenly, obtain suspended shape
The lead precursor liquid containing lead salt, organic phosphine, poor solvent and organic amine of state.Due to organic phosphine, organic amine easily with the oxygen in air
Gas, carbon dioxide reaction, therefore the step need to carry out under an inert atmosphere, such as can choose and carry out in glove box.
In a kind of wherein embodiment, in the lead precursor liquid containing lead salt, organic phosphine, poor solvent and organic amine
In, it is 1:0.5 ~ 3.5 by the molar ratio of the lead salt and organic phosphine, configuration is described to be contained lead salt, organic phosphine, poor solvent and have
The lead precursor liquid of machine amine, this is because when lead salt/organic phosphine ratio is excessive, the free lead ion that is dissolved out in lead precursor liquid compared with
Few, subsequent reactions nucleation is difficult；And lead salt/organic phosphine ratio it is too small when, the plumbum ion concentration to dissociate in lead precursor liquid is excessive, after
It is continuous to be swift in response, it is unfavorable for operating.
In a kind of wherein embodiment, in the lead precursor liquid containing lead salt, organic phosphine, poor solvent and organic amine
In, it is 1:50 ~ 200 by the molar ratio of the lead salt and poor solvent, it is described to contain lead salt, organic phosphine, poor solvent and organic amine
Lead precursor liquid, this is because when lead salt/poor solvent ratio is excessive, the free cesium ion concentration mistake that is dissolved out in lead precursor liquid
Greatly, subsequent reactions are rapid, are unfavorable for operating；And lead salt/poor solvent ratio it is too small when, the free caesium that dissolves out in lead precursor liquid
Ion is less, and combined coefficient is low, is not easy to produce.
In a kind of wherein embodiment, in the lead precursor liquid containing lead salt, organic phosphine, poor solvent and organic amine
In, it is 1:1 ~ 5 by the molar ratio of the lead salt and organic amine, configuration is described to be contained lead salt, organic phosphine, poor solvent and have
The lead precursor liquid of machine amine, this is because when lead salt/organic amine ratio is excessive, passivation protection effect of organic amine ligand to quantum dot
It is bad；And lead salt/organic amine ratio it is too small when, a large amount of organic amine ligands coat perovskite quantum dots, this can hinder photoelectric device
The injection of middle electronics influences the performance of device.
In a kind of wherein embodiment, the time of the stirring is 20 ~ 50 min, this is because mixing time is too short,
The plumbum ion concentration to dissociate in lead presoma is too low, is unfavorable for subsequent reactions nucleation；And mixing time it is too long when, plumbum ion concentration
Excessively high, subsequent reactions speed is fast, is unfavorable for operating.
Step 300 specifically includes: caesium precursor liquid and lead precursor liquid being uniformly mixed, obtain mixing precursor liquid, and will mixing
Precursor liquid is transferred in the reaction kettle of polytetrafluoroethyllining lining, screws reaction kettle.Then, reaction kettle is transferred to certain temperature
In convection oven, the temperature setting of the convection oven is 150 ~ 250 DEG C, then anti-under 150 DEG C ~ 250 DEG C constant temperatures
It answers, CsPbX is prepared3Perovskite quantum dot, wherein X is Cl, Br or I.Specifically, in 150 DEG C ~ 250 DEG C constant temperatures
Cesium ion, lead ion and the halide ion dissolved out in lower mixing precursor liquid carries out obtaining CsPbX at nuclear reaction3Perovskite quantum
Point, the CsPbX3Perovskite quantum dot surface and organic amine ligand binding, wherein X is Cl, Br or I.Reaction of the present invention
Temperature be 150 ~ 250 DEG C, i.e., above-mentioned convection oven temperature setting is 150 ~ 250 DEG C, this is because temperature is too low, reactant
It is that shape nucleating process is slower, the quantum point grain diameter being first nucleated is larger, and the quantum point grain diameter being nucleated afterwards is smaller, product cut size distribution
Width, luminance purity reduce；And temperature is excessively high, the crystal form of product is changed into rectangle crystal phase by cubic phase, is unable to get perovskite
CsPbX3(X=Cl, Br, I) quanta point material.
In a kind of wherein embodiment, in the step for being uniformly mixed the caesium precursor liquid and the lead precursor liquid,
It is 1:0.3 ~ 3 by the molar ratio of the lead ion dissolved out in the cesium ion and the lead precursor liquid dissolved out in the caesium precursor liquid, it will
The caesium precursor liquid and the lead precursor liquid are uniformly mixed.This is because cesium ion/lead ion ratio is excessive or too small, reactant
System cannot form group and be divided into CsPbX3 The perovskite quantum dot of (X=Cl, Br, I).
It is described at nuclear reaction in the step of being reacted under the conditions of 150 DEG C ~ 250 DEG C in a kind of wherein embodiment
Time is 20 ~ 60 min, this is because the reaction time is too short, forerunner's precursor reactant is incomplete, and combined coefficient is low；And reaction time mistake
Long, product is easy to be changed into 1-dimention nano wire material by zero-dimensional quantum dots material, influences the photoelectric properties of material, meanwhile, reaction
After time extends, combined coefficient can be reduced.
It further include CsPbX after step 3003The purification process of perovskite quantum dot specifically includes step: reaction terminates
Afterwards, reaction kettle is transferred out of convection oven, and reaction kettle is placed in ice water mixed liquor, be rapidly decreased to room temperature.It will be in reaction kettle
Reaction solution be transferred in centrifuge tube, and toluene is added, after 10000 rpm centrifugal treating, 5 min, removes supernatant liquor, and receive
Collect centrifuge tube bottom sediment.Then, sediment is completely dispersed with n-hexane, and 5000 rpm centrifugal treating, 5 min, is taken out
Big partial size substance in sediment, obtains the CsPbX of high-purity3Perovskite quantum dot.
The preparation method of perovskite quantum dot provided by the present invention is respectively caesium source, lead source using cesium salt, lead salt, has
Machine phosphine is the cosolvent in caesium source, lead salt, and poor solvent is solvent, and organic amine is ligand, is prepared for by solvent thermal process
CsPbX3Perovskite quantum dot (X=Cl, Br, I).During the preparation process, the cesium ion that is dissolved out in system, lead ion, halogen from
Son reaction nucleation, and under ligand protection, finally obtain CsPbX3(X=Cl, Br, I) perovskite quanta point material；Pass through
Change the preparation conditions such as reaction raw materials proportion, reaction temperature, reaction time, it can be achieved that material microscopic appearance is from quantum dot to nanometer
The transformation of line.Since caesium source, the solubility of lead source in a solvent are smaller, the growth rate of crystal in the reaction system compares
Slowly, therefore, the CsPbX of this method synthesis3The microscopic appearance, partial size of (X=Cl, Br, I) perovskite quanta point material are more equal
Even, luminance purity is high, and stability is preferable between batch, conducive to the material in illumination, the application of photoelectric display, photovoltaic art.
The present invention also provides a kind of perovskite quantum dots, wherein including CsPbX3Perovskite quantum dot, the CsPbX3Calcium
Titanium ore quantum dot surface is combined with organic amine ligand, and wherein X is Cl, Br or I.
It is described in detail below by preparation method of the embodiment to perovskite quantum dot.
Embodiment 1
The present embodiment CsPbCl3The preparation method of perovskite quantum dot, comprising the following steps:
(1) in glove box, 2.0 mmol CsCl, 1.3 mL tri octyl phosphines, 43 mL octadecylenes, 1.8 mL oleyl amines are added respectively
Enter in 100 mL three-neck flasks, 30 min are stirred under inert atmosphere, obtains the caesium precursor liquid of suspended state；
(2) in glove box, by 2.0 mmol PbCl2, 1.5 mL tri octyl phosphines, 43 mL octadecylenes, 1.8 mL oleyl amines difference
It is added in 100 mL three-neck flasks, 30 min is stirred under inert atmosphere, obtain the lead precursor liquid of suspended state；
(3) in glove box, caesium precursor liquid and lead precursor liquid are uniformly mixed, obtain reaction solution, and reaction solution is transferred to 100
In the reaction kettle of the polytetrafluoroethyllining lining of mL, reaction kettle is screwed.Then, reaction kettle is transferred to 160 DEG C of convection oven
In, and reaction kettle is transferred out of convection oven, and reaction kettle is placed in ice water and is mixed after reaction by 30 min of isothermal reaction
In liquid, it is rapidly decreased to room temperature；
(4) reaction solution after cooling is transferred in 50 mL centrifuge tubes, and 10 mL toluene, 10000 rpm centrifugal treatings 5 is added
After min, supernatant liquor is removed, and collects centrifuge tube bottom sediment.Then, sediment is completely dispersed with 20 mL n-hexanes,
And 5000 rpm centrifugal treating, 5 min, large-sized deposit is removed, the CsPbCl of high-purity is obtained3Perovskite quantum dot.
Embodiment 2
The present embodiment CsPbBr3The preparation method of perovskite quantum dot, comprising the following steps:
(1) in glove box, by 1.0 mmol Cs2CO3, 0.65 mL tri octyl phosphine, 22 mL octadecylenes, 0.9 mL oleyl amine point
It is not added in 50 mL three-neck flasks, 30 min is stirred under inert atmosphere, obtain the caesium precursor liquid of suspended state；
(2) in glove box, by 3.0 mmol PbBr2, 2.3 mL tri octyl phosphines, 65 mL octadecylenes, 2.7 mL oleyl amines difference
It is added in 100 mL three-neck flasks, 30 min is stirred under inert atmosphere, obtain the lead precursor liquid of suspended state；
(3) in glove box, caesium precursor liquid and lead precursor liquid are uniformly mixed, obtain reaction solution, and reaction solution is transferred to 100
In the reaction kettle of the polytetrafluoroethyllining lining of mL, reaction kettle is screwed.Then, reaction kettle is transferred to 160 DEG C of convection oven
In, and reaction kettle is transferred out of convection oven, and reaction kettle is placed in ice water and is mixed after reaction by 30 min of isothermal reaction
In liquid, it is rapidly decreased to room temperature；
(4) reaction solution after cooling is transferred in 50 mL centrifuge tubes, and 10 mL toluene, 10000 rpm centrifugal treatings 5 is added
After min, supernatant liquor is removed, and collects centrifuge tube bottom sediment.Then, sediment is completely dispersed with 20 mL n-hexanes,
And 5000 rpm centrifugal treating, 5 min, large-sized deposit is removed, the CsPbBr of high-purity is obtained3Perovskite quantum dot.
Embodiment 3
The present embodiment CsPbI3The preparation method of perovskite quantum dot, comprising the following steps:
(1) in glove box, 3.0 mmol CsI, 2.0 mL tri octyl phosphines, 65 mL octadecylenes, 2.7 mL oleyl amines are added respectively
Enter in 100 mL three-neck flasks, 30 min are stirred under inert atmosphere, obtains the caesium precursor liquid of suspended state；
(2) in glove box, by 1.0 mmol PbI2, 0.75 mL tri octyl phosphine, 22 mL octadecylenes, 0.90 mL oleyl amine difference
It is added in 50 mL three-neck flasks, 30 min is stirred under inert atmosphere, obtain the lead precursor liquid of suspended state；
(3) in glove box, caesium precursor liquid and lead precursor liquid are uniformly mixed, obtain reaction solution, and reaction solution is transferred to 100
In the reaction kettle of the polytetrafluoroethyllining lining of mL, reaction kettle is screwed.Then, reaction kettle is transferred to 160 DEG C of convection oven
In, and reaction kettle is transferred out of convection oven, and reaction kettle is placed in ice water and is mixed after reaction by 30 min of isothermal reaction
In liquid, it is rapidly decreased to room temperature；
(4) reaction solution after cooling is transferred in 50 mL centrifuge tubes, and 10 mL toluene, 10000 rpm centrifugal treatings 5 is added
After min, supernatant liquor is removed, and collects centrifuge tube bottom sediment.Then, sediment is completely dispersed with 20 mL n-hexanes,
And 5000 rpm centrifugal treating, 5 min, large-sized deposit is removed, the CsPbI of high-purity is obtained3Perovskite quantum dot.
In conclusion a kind of perovskite quantum dot provided by the invention and preparation method thereof, the present invention uses cesium salt, lead salt
For caesium source, lead source, organic phosphine is the cosolvent of cesium salt, lead salt, and long-chain olefin is solvent, and organic amine is ligand, passes through solvent heat
Method is prepared for perovskite quantum dot CsPbX3(X=Cl, Br, I) can be applicable to illumination, photoelectric display, photovoltaic industry neck
Domain；The CsPbX of this method synthesis3(X=Cl, Br, I) perovskite quanta point material luminance purity is high, and the batch of this method
Stability is high, is conducive to CsPbX3The industrialized production of (X=Cl, Br, I) perovskite quantum dot.
It should be understood that the application of the present invention is not limited to the above for those of ordinary skills can
With improvement or transformation based on the above description, all these modifications and variations all should belong to the guarantor of appended claims of the present invention
Protect range.
Claims (10)
1. a kind of preparation method of perovskite quantum dot, which comprises the following steps:
Caesium precursor liquid containing cesium salt, organic phosphine, poor solvent and organic amine is provided；
Lead precursor liquid containing lead salt, organic phosphine, poor solvent and organic amine is provided；
The caesium precursor liquid and the lead precursor liquid are mixed, CsPbX is prepared in heating3Perovskite quantum dot, wherein X be Cl,
Br or I.
2. the preparation method of perovskite quantum dot according to claim 1, which is characterized in that press the cesium salt and organic phosphine
Molar ratio be 1:0.5 ~ 2, configuration obtains the caesium precursor liquid containing cesium salt, organic phosphine, poor solvent and organic amine；
And/or by the molar ratio of the cesium salt and poor solvent be 1:50 ~ 200, configuration obtains described containing cesium salt, organic phosphine, no
The caesium precursor liquid of good solvent and organic amine；
And/or by the molar ratio of the cesium salt and organic amine be 1:1 ~ 5, configuration obtains described containing cesium salt, organic phosphine, poor solvent
With the caesium precursor liquid of organic amine.
3. the preparation method of perovskite quantum dot according to claim 1, which is characterized in that the cesium salt is selected from chlorination
Caesium, cesium bromide, cesium iodide, cesium acetate or cesium carbonate；
And/or the lead salt is selected from lead chloride, lead bromide, lead iodide, lead acetate or ceruse；
Wherein, at least one of the cesium salt and the lead salt are metal halide.
4. the preparation method of perovskite quantum dot according to claim 1, which is characterized in that the organic phosphine is selected from three fourths
Base phosphine, tri octyl phosphine, tributylphosphine oxide or trioctyl phosphine oxide.
5. the preparation method of perovskite quantum dot according to claim 1, which is characterized in that the poor solvent is selected from carbon
The long-chain olefin that atomicity is 9 ~ 19.
6. the preparation method of perovskite quantum dot according to claim 1, which is characterized in that the organic amine is selected from 12
Amine, tetradecy lamine, octadecylamine or oleyl amine.
7. the preparation method of perovskite quantum dot according to claim 1, which is characterized in that press the lead salt and organic phosphine
Molar ratio be 1:0.5 ~ 3.5, configuration obtains the lead precursor liquid containing lead salt, organic phosphine, poor solvent and organic amine；
And/or by the molar ratio of the lead salt and poor solvent be 1:50 ~ 200, configuration obtains described containing lead salt, organic phosphine, no
The lead precursor liquid of good solvent and organic amine；
And/or by the molar ratio of the lead salt and organic amine be 1:1 ~ 5, configuration obtains described containing lead salt, organic phosphine, poor solvent
With the lead precursor liquid of organic amine.
8. the preparation method of perovskite quantum dot according to claim 1, which is characterized in that by the caesium precursor liquid and
In the step of lead precursor liquid mixes, by the lead dissolved out in the cesium ion and the lead precursor liquid dissolved out in the caesium precursor liquid
The molar ratio of ion is 1:0.3 ~ 3, and the caesium precursor liquid and the lead precursor liquid are mixed.
9. the preparation method of perovskite quantum dot according to claim 1, which is characterized in that by the caesium precursor liquid and institute
The mixing of lead precursor liquid is stated, CsPbX is prepared in heating3In the step of perovskite quantum dot, heating temperature is 150 DEG C ~ 250
DEG C, heating time is 20 ~ 60 min.
10. a kind of perovskite quantum dot, which is characterized in that including CsPbX3Perovskite quantum dot, the CsPbX3Perovskite quantum
Point surface is combined with organic amine ligand, and wherein X is Cl, Br or I.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114195650A (en) * | 2021-12-13 | 2022-03-18 | 南开大学 | Perovskite metal halide zero-dimensional quantum dot composite material, preparation method thereof and application of organic amine salt |
| CN114557478A (en) * | 2022-01-12 | 2022-05-31 | 华南师范大学 | Photocatalytic degradation filter cigarette holder and preparation method thereof |
| CN115340124A (en) * | 2022-08-20 | 2022-11-15 | 武汉中科先进技术科技服务有限公司 | Machine-assisted high-flux preparation method of laminated perovskite material with different particle sizes |
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| CN105838366A (en) * | 2016-04-11 | 2016-08-10 | 武汉保丽量彩科技有限公司 | A fluorescent caesium-lead-halogen group perovskite quantum dot material, a preparing method thereof and applications of the material |
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| CN105838366A (en) * | 2016-04-11 | 2016-08-10 | 武汉保丽量彩科技有限公司 | A fluorescent caesium-lead-halogen group perovskite quantum dot material, a preparing method thereof and applications of the material |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114195650A (en) * | 2021-12-13 | 2022-03-18 | 南开大学 | Perovskite metal halide zero-dimensional quantum dot composite material, preparation method thereof and application of organic amine salt |
| CN114557478A (en) * | 2022-01-12 | 2022-05-31 | 华南师范大学 | Photocatalytic degradation filter cigarette holder and preparation method thereof |
| CN115340124A (en) * | 2022-08-20 | 2022-11-15 | 武汉中科先进技术科技服务有限公司 | Machine-assisted high-flux preparation method of laminated perovskite material with different particle sizes |
| CN115340124B (en) * | 2022-08-20 | 2023-11-03 | 武汉中科先进技术科技服务有限公司 | High-flux preparation method of laminated perovskite materials with different particle diameters in machine-assisted manner |
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Application publication date: 20190705 |