CN109593309A - Perovskite quantum dot film and structure containing perovskite quantum dot film - Google Patents
Perovskite quantum dot film and structure containing perovskite quantum dot film Download PDFInfo
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Abstract
A kind of structure the invention discloses perovskite quantum dot film and containing the quantum dot film, which includes: polyvinyl butyral；Plasticizer is dispersed in polyvinyl butyral；Perovskite quantum dot, is dispersed in polyvinyl butyral, and to absorb ultraviolet light, the chemical formula of perovskite quantum dot is ABX3, wherein A is at least one of amine organic group, inorganic metal, at least one of B Pb, Sn, Ge, at least one of X Cl, Br, I.Perovskite quantum dot in the perovskite quantum dot film has good photo absorption performance, it can absorb a large amount of ultraviolet light, after perovskite quantum dot absorbs ultraviolet light, being not easy can be there is a phenomenon where degrading, and the ability which absorbs ultraviolet light, which will not reduce, will not more fail.
Description
Technical field
The application belongs to quantum dot field, in particular to a kind of quantum dot film and the structure containing the quantum dot film.
Background technique
Too strong ultraviolet light has injury to human body or colored objects is made to fade.In daily life, ultraviolet-absorbing film is utilized
Ultraviolet light is taken precautions against.Existing UVR absorbing film absorbs ultraviolet light by ultraviolet absorbing agent, to realize
Prevention to ultraviolet light.
But these ultraviolet absorbing agents can degrade after a period of time, therefore to ultraviolet-absorbing film to purple
The absorption of outside line causes undesirable influence.
Summary of the invention
In view of the above technical problems, the application provides a kind of ultraviolet-absorbing film that chemical property is stable.
A kind of perovskite quantum dot film includes: polyvinyl butyral；Plasticizer is dispersed in polyvinyl butyral
In (polyvinyl butyral, PVB)；Perovskite quantum dot, is dispersed in polyvinyl butyral, to absorb ultraviolet light, calcium
The chemical formula of titanium ore quantum dot is ABX3, wherein A be at least one of amine organic group, inorganic metal, B Pb, Sn,
At least one of at least one of Ge, X Cl, Br, I.
Perovskite quantum dot in the perovskite quantum dot film has good photo absorption performance, can absorb a large amount of purple
Outside line, after perovskite quantum dot absorbs ultraviolet light, being not easy can be there is a phenomenon where degrading, which absorbs the energy of ultraviolet light
Power, which will not reduce, will not more fail.
The fluorescence quantum efficiency of perovskite quantum dot is 0%~30% in one of the embodiments,；Preferably, calcium titanium
The fluorescence quantum efficiency of mine quantum dot is 0%~10%.
Perovskite quantum dot is CsPbBr in one of the embodiments,3Quantum dot.
Perovskite quantum dot is coated with shell, shell Cs in one of the embodiments,4PbBr6Or Rb4PbBr6。
Mass fraction of the perovskite quantum dot in quantum dot film is 2%~5% in one of the embodiments,.
In one of the embodiments, plasticizer include two tricaprylate of triethylene glycol (Triglycol dioctate,
3GO)；The mass ratio of polyvinyl butyral and two tricaprylate of triethylene glycol is 3.5~2.5:1.
The number-average molecular weight of polyvinyl butyral is 10000~200000 in one of the embodiments,.
A kind of structure containing perovskite quantum dot film, including transparent substrate and perovskite quantum dot film；Perovskite quantum
Point film includes: polyvinyl butyral；Two tricaprylate of triethylene glycol, is dispersed in polyvinyl butyral；Perovskite quantum dot, point
It is dispersed in polyvinyl butyral, to absorb ultraviolet light, the chemical formula of perovskite quantum dot is ABX3, wherein A is that amine is organic
At least one of group, inorganic metal, at least one of B Pb, Sn, Ge, at least one of X Cl, Br, I.
In one of the embodiments, quantum dot film with a thickness of 0.01~1 millimeter.
It in one of the embodiments, include two transparent substrates, two transparent substrates set up separately in the two sides of quantum dot film.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the perovskite Quantum Dot Glass of an embodiment in the application.
Identical component has used identical appended drawing reference in the accompanying drawings.Attached drawing only symbolically shows the reality of the application
Apply scheme.
Specific embodiment
Below in conjunction with the application embodiment, technical solutions in the embodiments of the present application is described in detail.It answers
It is noted that described embodiment is only a part of embodiment of the application, rather than whole embodiments.
Present embodiment discloses a kind of quantum dot film, which includes polyvinyl butyral, plasticizer and calcium titanium
Mine quantum dot, plasticizer and perovskite quantum dot are dispersed in polyvinyl butyral.Perovskite quantum dot is ultraviolet to absorb
Line.The chemical formula of perovskite quantum dot is ABX3, wherein A is amine organic group (such as CH3NH3), inorganic metal (such as
At least one of Cs), at least one of B Pb, Sn, Ge, X include at least one of Cl, Br, I.
There is perovskite quantum dot excellent absorbing ability can absorb a large amount of purple especially in ultra-violet bands
Outside line, so that the quantum dot film has the good ability for absorbing ultraviolet light.The quantum dot film takes full advantage of perovskite
The strong advantage of quantum dot absorbing ability absorbs ultraviolet light by perovskite quantum dot, and perovskite quantum dot is not susceptible to degradation
Phenomenon, so that the ability that the quantum dot film absorbs ultraviolet light will not be substantially reduced less and will cause failure.
In the present embodiment, the fluorescence quantum efficiency of perovskite quantum dot is 0%~30%, these perovskite quantum dots
Light conversion efficiency is lower, these perovskite quantum dots only have less light that can emit after absorbing light.Further,
The fluorescence quantum efficiency of perovskite quantum dot be 0%~10%, these perovskite quantum dots absorb light after almost no longer with
The light that the form of light emits or emits is very faint.Therefore, these perovskite quantum dots absorb ultraviolet light after, no longer into
The intensity of the light of the conversion of row light or conversion is very faint.That is, using fluorescence quantum efficiency for 0%~30% or 0%
Ultraviolet light can be absorbed in quantum dot film after~10% perovskite quantum dot, and itself no longer emits light or transmitting light
Intensity is very faint, and the light of other wavelength in environment is not interfered with or influenced, therefore bad shadow can't be caused to daily life
It rings.
Now, when preparing or using quantum dot, pursuit is higher fluorescence quantum efficiency, and fluorescence quantum efficiency
Also it is further being promoted.Currently, the fluorescence quantum efficiency of some quantum dots can achieve 95% or more.The fluorescent quantum of quantum dot
Efficiency is lower, all can be considered as a kind of disadvantage.And the perovskite quantum dot being used in the present invention, it does not pursue not only higher
Fluorescence quantum efficiency, and need fluorescence quantum efficiency more lower better.That is, the perovskite quantum dot energy that the present invention uses
A large amount of light is enough absorbed, and simultaneously the light absorbed is converted in the form of light no longer or only converts smaller part of light.At this
The fluorescence quantum efficiency that perovskite quantum dot is cleverly utilized in quantum dot film in invention is low, this to be considered with obvious bad
When the quantum dot of gesture is arranged in quantum dot film, while so that the quantum dot film absorbs ultraviolet light, to its all band in environment
Light almost or only less interference, be widely used in daily life, can't also generate undesirable shadow to daily life
It rings, becomes a kind of advantage instead, to play the effect for making us unexpected.
Here, the higher perovskite quantum dot of fluorescence quantum efficiency can be placed in, temperature is 85 DEG C, relative humidity is
In 85% environment, the reduction of the fluorescence quantum efficiency of Lai Shixian perovskite quantum dot.Perovskite quantum dot in this context 48
Hour after, fluorescence quantum efficiency is substantially reduced, the fluorescence quantum efficiency of these perovskite quantum dots can be reduced to 30% with
Under.
In the present embodiment, perovskite quantum dot can be CsPbBr3Quantum dot.Inventors have found that in perovskite amount
In son point, CsPbBr3Quantum dot has relatively stable structure, and also has excellent absorbing ability, thus CsPbBr3Amount
Son point can absorb more ultraviolet light.In other words, which uses CsPbBr3Quantum dot can guarantee equally
Absorption ultraviolet light effect when, using less amount of quantum dot, thus save the cost.
The outer layer of perovskite quantum dot in present embodiment can also be coated with shell, these shells are Cs4PbBr6Or
Rb4PbBr6, so that the perovskite quantum dot has more stable structure, it is not easily susceptible to extraneous adverse effect.
The perovskite quantum dot film needs to absorb ultraviolet light after being irradiated by light, and to the light of visible light wave range
It is transmissive to.But perovskite quantum dot can not preferably select the wavelength of light during light absorption,
Certain visible light can be also absorbed while absorbing ultraviolet light.Inventors have found that in solar spectrum, the content of ultraviolet light compared with
It is low, it is seen that the content of light is more, when mass fraction of the perovskite quantum dot in the quantum dot film is 2%~5%, can inhale
Most of ultraviolet light in sunlight is received, and to visible light (such as blue light etc.) almost without absorption, it will not influence the perovskite
The normal use of quantum dot film.
Polyvinyl butyral has excellent optical property and chemical stability, the quantum dot film can be made to have excellent
Good optical property and chemical stability.The quantum dot film has the light of its all band excellent while absorbing ultraviolet light
Permeability.After plasticizer is added in polyvinyl butyral, perovskite quantum dot can be made in polyvinyl butyral
In have good dispersibility.Plasticizer can be aliphatic dibasic acid ester, Phthalates (including phthalic acid ester
Class, terephthalic acid ester), benzene polyacid esters, benzoates, polyalcohol esters, chlorinated hydrocarbons, epoxies, citrate
Class, polyesters etc..Inventors have found that perovskite quantum dot contracts in polyvinyl alcohol when plasticizer is two tricaprylate of triethylene glycol
There is very outstanding dispersion performance in butyraldehyde.In other words, under the action of two tricaprylate of triethylene glycol, perovskite quantum dot
It is not easy to reunite in polyvinyl butyral, absorbing ability etc. is not adversely affected.Perovskite quantum dot exists
There is excellent dispersion performance in entire quantum dot film, do not have the generation of apparent agglomeration between quantum dot, absorb purple
The ability of outside line does not have and significantly reduces, and absorbs ultraviolet light on the whole with homogeneity.Work as polyvinyl butyral
When mass ratio with two tricaprylate of triethylene glycol is 3.5~2.5:1, perovskite quantum dot has good in the quantum dot film
Dispersion performance.
Inventors have found that perovskite can be made when the number-average molecular weight of polyvinyl butyral is 10000~200000
Quantum dot film has more preferably stability and optical property.To promote the service life and effect of quantum dot film.
Referring now to Fig. 1, present embodiment further discloses a kind of structure 1 containing perovskite quantum dot film, the structure 1
Including the first transparent substrate 11 and perovskite quantum dot film 12 described above.The perovskite quantum dot film 12 includes poly- second
Enol butyral, two tricaprylate of triethylene glycol and perovskite quantum dot, perovskite quantum dot and the dispersion of two tricaprylate of triethylene glycol
In polyvinyl butyral, ultraviolet light is can be absorbed in these perovskite quantum dots.To which ultraviolet light can be absorbed in the structure 1,
To reduce adverse effect of the ultraviolet light to human body etc..
The perovskite quantum dot film 12 with a thickness of between 0.01~1 millimeter, while there is good absorption ultraviolet light,
There is good translucency again.
Certainly, the second transparent substrate 13 can also be arranged in the other side of the perovskite quantum dot film 12, thus forming amount
Sandwich of the son point film 12 between the first transparent substrate 11 and the second transparent substrate 13.
Illustrate the structure containing perovskite quantum dot film in the invention below by way of several specific embodiments
Specific structure.
Embodiment 1:
The two sides of quantum dot film are respectively provided with glass substrate.The quantum dot film with a thickness of 0.38 millimeter.The quantum dot film packet
Include CsPbBr3Quantum dot, two tricaprylate of triethylene glycol, polyvinyl butyral, the mass ratio between this three is 1:10:
30.The number-average molecular weight of polyvinyl butyral is 100000.CsPbBr3The fluorescence quantum efficiency of quantum dot is 2.0%.
Embodiment 2:
The two sides of quantum dot film are respectively provided with pet substrate.The quantum dot film with a thickness of 0.76 millimeter.The quantum dot film includes
CsPbBr3Quantum dot, two tricaprylate of triethylene glycol, polyvinyl butyral, the mass ratio between this three are 1:5.5:14.
The number-average molecular weight of polyvinyl butyral is 12000.CsPbBr3The fluorescence quantum efficiency of quantum dot is 4.2%.
Embodiment 3:
Glass substrate is arranged in the side of quantum dot film, and barrier film is arranged in the other side of the quantum dot film.The quantum dot film
With a thickness of 0.05 millimeter.The quantum dot film includes CH3NH3PbBr3Quantum dot, two tricaprylate of triethylene glycol, polyvinyl alcohol contracting fourth
Aldehyde, the mass ratio between this three are 1:7:21.The number-average molecular weight of polyvinyl butyral is 150000.CH3NH3PbBr3
The fluorescence quantum efficiency of quantum dot is 5.8%.
Embodiment 4:
The two sides of quantum dot film are respectively provided with PVC substrate.The quantum dot film with a thickness of 0.50 millimeter.The quantum dot film includes
CsPbI3Quantum dot, two tricaprylate of triethylene glycol, polyvinyl butyral, the mass ratio between this three is 1:4.8:
14.5.The number-average molecular weight of polyvinyl butyral is 100000.CsPbI3The fluorescence quantum efficiency of quantum dot is 11.3%.
Quantum dot film in above-described embodiment 1 to 4 is placed under the long-term irradiation of ultraviolet light, these is measured respectively and contains calcium
The absorption of UV when original state of the structure of titanium ore quantum dot film and after ultraviolet light irradiation in 800 hours, specifically
Numerical value is as shown in the table.The absorption of UV of structure in embodiment is irradiated the structure by 380 nanometers of light and is obtained.Through
The quantum dot film in measurement discovery embodiment 1 to 4 is crossed after the irradiation of long-time ultraviolet light, there is no obvious for rate of absorbing UV
Decaying, it is possible to find out that the chemical property of the quantum dot film in these embodiments is more stable, quantum dot absorb ultraviolet light
Later, the phenomenon that and being not susceptible to degradation.
| Original state absorptivity | Absorptivity after 800 hours | |
| Embodiment 1 | 98.6% | 98.4% |
| Embodiment 2 | 99.3% | 99.2% |
| Embodiment 3 | 98.1% | 97.3% |
| Embodiment 4 | 99.5% | 99.5% |
As can be seen that after a period of time, these contain the structure of perovskite quantum dot film from above-described embodiment
Ultraviolet absorption ability is not substantially reduced.Because these quantum dot films by prolonged ultraviolet light irradiation there is no occur compared with
Big variation, it can be seen that the revealed quantum dot film of the invention and the structure accordingly with the quantum dot film have preferably surely
It is qualitative.
Although inventor has done more detailed elaboration to the technical solution of the application and has enumerated, it should be understood that for
For those skilled in the art, above-described embodiment is modified and/or the flexible or equivalent alternative solution of use is obvious
, cannot all be detached from the essence of the application spirit, the term occurred in the application be used for elaboration to technical scheme and
Understand, the limitation to the application can not be constituted.
Claims (10)
1. a kind of perovskite quantum dot film, comprising: polyvinyl butyral；
Plasticizer is dispersed in the polyvinyl butyral；
Perovskite quantum dot is dispersed in the polyvinyl butyral, to absorb ultraviolet light, the change of the perovskite quantum dot
Formula is ABX3, wherein A be at least one of amine organic group, inorganic metal, at least one of B Pb, Sn, Ge,
X is at least one of Cl, Br, I.
2. perovskite quantum dot film according to claim 1, which is characterized in that the fluorescent quantum of the perovskite quantum dot
Efficiency is 0%~30%；
Preferably, the fluorescence quantum efficiency of the perovskite quantum dot is 0%~10%.
3. perovskite quantum dot film according to claim 1, which is characterized in that the perovskite quantum dot is CsPbBr3Amount
Sub- point.
4. perovskite quantum dot film according to claim 1, which is characterized in that the perovskite quantum dot is coated with shell
Layer, shell Cs4PbBr6Or Rb4PbBr6。
5. perovskite quantum dot film according to claim 1, which is characterized in that the perovskite quantum dot is in the quantum
Mass fraction in point film is 2%~5%.
6. perovskite quantum dot film according to claim 5, which is characterized in that the plasticizer includes that triethylene glycol two is different pungent
Acid esters；
The mass ratio of the polyvinyl butyral and two tricaprylate of triethylene glycol is 3.5~2.5:1.
7. perovskite quantum dot film according to claim 1, which is characterized in that the number-average molecular weight of polyvinyl butyral
It is 10000~200000.
8. a kind of structure containing perovskite quantum dot film, including transparent substrate and perovskite quantum dot film；
The perovskite quantum dot film includes: polyvinyl butyral；
Two tricaprylate of triethylene glycol, is dispersed in the polyvinyl butyral；
Perovskite quantum dot is dispersed in the polyvinyl butyral, to absorb ultraviolet light, the change of the perovskite quantum dot
Formula is ABX3, wherein A be at least one of amine organic group, inorganic metal, at least one of B Pb, Sn, Ge,
X is at least one of Cl, Br, I.
9. the structure according to claim 8 containing perovskite quantum dot film, which is characterized in that the thickness of the quantum dot film
Degree is 0.01~1 millimeter.
10. the structure according to claim 9 containing perovskite quantum dot film, which is characterized in that including two transparent bases
Plate, described two transparent substrates set up separately in the two sides of quantum dot film.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112724970A (en) * | 2020-12-29 | 2021-04-30 | 温州大学 | Preparation method of PVB (polyvinyl butyral) coated metal halide perovskite solid film material |
| CN112745831A (en) * | 2020-12-25 | 2021-05-04 | 温州大学 | PVB cladding CsPbBr3Preparation method of quantum dot thin film material |
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|---|---|---|---|---|
| US20030178632A1 (en) * | 2002-03-25 | 2003-09-25 | Patent-Treuhand-Gesellschaft Fur Elektrische Gluhlampen Mbh | Opto-electronic semiconductor component |
| CN108192593A (en) * | 2018-01-18 | 2018-06-22 | 合肥工业大学 | Optical thin film based on inorganic perovskite quantum dot with conjugation organic molecule eutectic structure |
| CN108676182A (en) * | 2018-02-27 | 2018-10-19 | 北京理工大学 | A kind of polymer matrix function film and preparation method thereof |
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2018
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030178632A1 (en) * | 2002-03-25 | 2003-09-25 | Patent-Treuhand-Gesellschaft Fur Elektrische Gluhlampen Mbh | Opto-electronic semiconductor component |
| CN108192593A (en) * | 2018-01-18 | 2018-06-22 | 合肥工业大学 | Optical thin film based on inorganic perovskite quantum dot with conjugation organic molecule eutectic structure |
| CN108676182A (en) * | 2018-02-27 | 2018-10-19 | 北京理工大学 | A kind of polymer matrix function film and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112745831A (en) * | 2020-12-25 | 2021-05-04 | 温州大学 | PVB cladding CsPbBr3Preparation method of quantum dot thin film material |
| CN112745831B (en) * | 2020-12-25 | 2022-12-23 | 温州大学 | PVB cladding CsPbBr 3 Preparation method of quantum dot film material |
| CN112724970A (en) * | 2020-12-29 | 2021-04-30 | 温州大学 | Preparation method of PVB (polyvinyl butyral) coated metal halide perovskite solid film material |
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