CN109216561A - A kind of flexibility perovskite solar battery scrapes coating preparation method - Google Patents
A kind of flexibility perovskite solar battery scrapes coating preparation method Download PDFInfo
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- H—ELECTRICITY
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- H10K30/00—Organic devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation
- H10K30/10—Organic devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation comprising heterojunctions between organic semiconductors and inorganic semiconductors
- H10K30/15—Sensitised wide-bandgap semiconductor devices, e.g. dye-sensitised TiO2
- H10K30/151—Sensitised wide-bandgap semiconductor devices, e.g. dye-sensitised TiO2 the wide bandgap semiconductor comprising titanium oxide, e.g. TiO2
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- H10K77/10—Substrates, e.g. flexible substrates
- H10K77/111—Flexible substrates
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Abstract
What the present invention disclosed a kind of flexible perovskite solar battery scrapes coating preparation method, comprising the following steps: prepares hole transmission layer, mesoporous layer, indium sulphur-perovskite composite layer in conductive substrates using knife coating, wherein the perovskite is CH3NH3PbI3；The mesoporous layer slurry is mixed by aluminium oxide aqueous dispersions with nano titanium oxide powder, and the mass concentration of nano titanium oxide powder is 10-30mg/mL；The present invention replaces traditional glass substrate using flexible substrates, realize the flexibility of perovskite solar battery, the range of perovskite solar cell application is widened, and preparation process is simple, cost can be reduced using knife coating, realize green production, while the preparation of perovskite solar battery structure of the present invention, without high temperature sintering, the mixture filming performance of indium sulphur and perovskite is good.
Description
Technical field
The present invention relates to the technical field of solar batteries based on the perovskite material of hybrid inorganic-organic, especially relate to
And a kind of flexible perovskite solar battery scrapes coating preparation method.
Background technique
Perovskite solar battery (perovskitesolarcells) is due to being that dye-sensitized solar cells differentiation comes
A kind of novel solar battery；When receiving sunlight irradiation, calcium titanium ore bed absorbs photon first and generates electron-hole pair；By
In the difference of perovskite material exciton bind energy, these carriers perhaps become free carrier or form exciton；Then, this
A little not compound electrons and holes are collected by electron transfer layer and hole transmission layer respectively, i.e., electronics is transferred to electricity from calcium titanium ore bed
Sub- transport layer, is finally collected by conductive substrates；Hole is transferred to hole transmission layer from calcium titanium ore bed, is finally received by metal electrode
Collection；Perovskite solar battery is respectively glass conductive substrates (FTO), electron transfer layer (ETM), the suction of perovskite light from bottom to top
Receive layer (containing porous support), hole transmission layer (HTM) and back electrode.
In the conventional method, spin-coating method is still main stream approach, and this method can eaily obtain uniform calcium
Titanium ore film, but this process is very big to the loss of raw material, at high cost, rate is slow, be not suitable for large-scale industrial production,
In current technology, the preparation of calcium titanium ore bed and other main relevant functional layers is concentrated mainly in glove box, is relied on lazy
Property gas shield, this is a huge limitation for the volume production in perovskite future；Current techniques generally use glass conductive
Substrate, but substrate of glass brittleness is strong, can not be bent, and brings limitation to the preparation of later period functional layer, while also seriously restricting perovskite
The large-scale use of solar battery.
Summary of the invention
For the above-mentioned problems in the prior art, the present invention is intended to provide a kind of simply and effectively using blade coating legal system
The method of standby perovskite solar battery is mainly reflected in simpler efficient, low for equipment requirements, section in printing preparation method
About cost, and use method of the invention can efficiently prepare the perovskite solar battery of high quality in air.
In order to achieve the above object, the invention adopts the following technical scheme:
A kind of flexibility perovskite solar battery scrapes coating preparation method, comprising the following steps: using knife coating in conductive substrates
On prepare hole transmission layer, mesoporous layer, indium sulphur-perovskite composite layer, wherein the perovskite be CH3NH3PbI3；It is given an account of
Aperture layer slurry is mixed by aluminium oxide aqueous dispersions with nano titanium oxide powder.
Using preparation method of the invention, hole transmission layer, mesoporous layer, copper and indium can be sequentially prepared in conductive substrates
Then sulphur-perovskite composite layer prepares back electrode on indium sulphur-perovskite composite layer；It can also be using knife coating in flexibility
Electron transfer layer, mesoporous layer, indium sulphur-indium sulphur-perovskite composite layer are sequentially prepared in conductive substrates, then in indium sulphur-
Back electrode is prepared on perovskite composite layer；Active layer of the invention is compound using indium sulphur-perovskite, indium sulphur nano particle meeting
It is filled in indium sulphur-perovskite composite layer hole, the film forming of perovskite active layer is improved, to improve the perovskite sun
The photoelectric conversion efficiency of energy battery；Mesoporous layer is mixed in a certain ratio with nano titanium oxide powder by aluminium oxide aqueous dispersions and is made
Slurry can be scratched, suitable film forming thickness and the good uniformity can be obtained, titanium oxide is scattered in aluminium oxide water dispersion solution
Middle one side can adjust the viscosity of aluminium oxide aqueous dispersions, and simultaneous oxidation titanium can play the role of electron transfer layer, and collaboration improves
Perovskite solar battery efficiency.
Preferably, the nano aluminium oxide aqueous dispersions are selected from the nano aluminium oxide moisture of Aladdin (Aladdin) brand
Dispersion liquid, the mass fraction of aluminium oxide are 20%, and the partial size of nano alumina particles is 5-10nm；The quality of nano titanium oxide powder
Concentration is 10-30mg/mL, and the partial size of titanium oxide is 5-30nm.
It is furthermore preferred that the mass concentration for stating nano titanium oxide powder is 20mg/mL；It, can be under this concentration condition
Suitable film forming thickness and the good uniformity are obtained, film forming is improved.
As the optimal technical scheme of the method for the invention, the described method comprises the following steps:
S1, the precursor solution that hole transmission layer is scratched in conductive substrates, then in 90-100 DEG C of annealing 10-15min, thus
Hole transmission layer is prepared in conductive substrates；
Wherein, blade coating speed is 20-25mm/s, and scraper height is 20-50 μm；
S2, mesoporous layer slurry is scratched on the hole transport layer, then in 90-100 DEG C of annealing 10-15min, thus in conductive substrates
On mesoporous layer is prepared；
Wherein, blade coating speed is 20-25mm/s, and scraper height is 35-60 μm；
S3, the mixed solution that indium sulphur and perovskite are scratched on mesoporous layer, then in 90-100 DEG C of annealing 10-20min, thus
The compound indium sulphur of indium sulphur-perovskite-perovskite composite layer is obtained on mesoporous layer；
Wherein, blade coating speed is speed 15-20mm/s, and scraper height is 50-80 μm.
Preferably, the hole transmission layer is CuInS2Layer, the CuInS2The preparation method of precursor solution is as follows:
Under nitrogen protection, the propionic acid of the indium acetate of every 0.08-0.12mmol, the thiocarbamide of 0.4-0.6mmol and 30-50 μ is dissolved into
In the butylamine of 0.4-0.8mL, and ultrasonic disperse is carried out, forms homogeneous solution, add the CuI of 0.09-0.13mmol, obtain
CuInS2Precursor solution.
Specifically, the area ratio of the volumetric usage and conductive substrates of the hole transmission layer solution be 15 μ L/ (2cm ×
4cm), under the conditions of this ratio, suitable film forming thickness and the good uniformity can be obtained.
It is furthermore preferred that the CuInS2Precursor solution further includes ethylene glycol, and the additive amount of the ethylene glycol is CuInS2Before
Drive the 12-15% of liquid solution total volume；Add the ethylene glycol of certain volume, adjustable CuInS2The viscosity of precursor solution, obtains
To slurry needed for present invention blade coating, be conducive to the film forming for improving hole transmission layer.
Preferably, the preparation method of the mixed solution of the indium sulphur and perovskite are as follows: by every 0.085-0.34mmol's
In(OAc)3, 0.09-0.36mmol CuI, 0.043-0.17mmol thiocarbamide be dissolved into 0.4-1.6mL perovskite N, N-
In dimethyl formamide solution, the mass percent of perovskite is 20- in the n,N-Dimethylformamide solution of the perovskite
40%；On the one hand indium sulphur is added in perovskite can increase indium sulphur-perovskite composite layer film forming, on the other hand have
Conducive to the compactness for improving active layer, to improve the efficiency of perovskite solar battery.
Specifically, the 15 μ L/ (2cm × 4cm) of area ratio of the mixed solution and conductive substrates of indium sulphur and perovskite；?
Under the conditions of this ratio, suitable film forming thickness and the good uniformity can be obtained, with electron transfer layer or hole transmission layer
Contact is also more preferable.
Preferably, further include preparing back electrode on the electron transport layer, obtain perovskite solar battery.
Preferably, the back electrode is the combination of any one or two kinds in metal electrode or carbon electrode.
Specifically, the mode for preparing back electrode on the electron transport layer is appointing in vapor deposition, silk-screen printing or printing
It anticipates one kind.
Preferably, the size of the conductive substrates is (2-10cm) × (2-10cm)；The conductive substrates are with indium tin
The transparent polymeric film of oxide ITO can obtain more homogeneous film formation areas in conjunction with doctor blade process over a larger area
Domain carries out subsequent step by choosing homogeneous film formation region, to improve the performance of obtained flexible perovskite solar battery.
Compared with prior art, the beneficial effects of the present invention are:
(1) present invention substitutes traditional glass substrate using the transparent polymeric film flexible substrates with ITO, is replaced with knife coating and is revolved
Coating is coated with all functional layers (hole transmission layer, mesoporous layer, indium sulphur-perovskite composite layer), by adjusting each functional layer slurry
The parameters such as blade coating speed and scraper height when the viscosity and blade coating of material, can be in air (air humidity be below 50) efficiently
Ground prepare high quality flexible perovskite solar battery, prepared to be substituted in glove box, operation be easier and cost more
It is low, while also reducing influence of the introducing of unfavorable factor to preparation method and properties of product；
(2) preparation of perovskite solar battery structure of the present invention is not necessarily to high temperature sintering, the mixture of indium sulphur and perovskite, copper
Indium sulphur nano particle can be filled in the hole of perovskite, the compactness of perovskite active layer be improved, to improve perovskite too
The photoelectric conversion efficiency of positive energy battery；
(3) mesoporous layer slurry is mixed by aluminium oxide aqueous dispersions with nano titanium oxide powder, in ratio condition of the invention
Under, suitable film forming thickness and the good uniformity can be obtained, to improve the efficiency of perovskite solar battery.
Detailed description of the invention
Fig. 1 is perovskite solar battery structure schematic diagram of the present invention.
Fig. 2 is the i-v curve that sample prepared by embodiment 1 measures.
Fig. 3 is the i-v curve that sample prepared by embodiment 2 measures.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to embodiments, to the present invention
It is further elaborated；It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, it is not used to
Limit the present invention；Unless stated otherwise, the present invention uses reagent, method and apparatus is the art conventional reagents, method
And equipment.
The present invention will be further described With reference to embodiment.
Embodiment 1
As shown in Figure 1, scraping coating preparation method the present embodiment provides a kind of flexible perovskite solar battery, specifically, first exist
Hole transmission layer CuInS is coated in flexible substrates2Layer, then in hole transmission layer CuInS2It is successively coated on the basis of layer mesoporous
Then layer, indium sulphur-perovskite composite layer use the method for silk-screen printing as photosensitive layer on indium sulphur-perovskite composite layer
Brush one layer of back electrode silver paste.
A kind of flexibility perovskite solar battery scrapes coating preparation method, comprising the following steps:
S1, the precursor solution that 15 μ L hole transmission layers are scratched on flexible conducting substrate (2cm × 4cm), are then moved back in 100 DEG C
Fiery 10min, so that hole transmission layer be prepared on flexible conducting substrate；
Wherein, blade coating speed is 20mm/s, and scraper height is 20 μm；
The hole transmission layer is CuInS2Layer, the CuInS2The preparation method of precursor solution is as follows: by 0.1mmol acetic acid
Indium, 0.5mmol thiocarbamide and 40 μ L propionic acid are dissolved in 0.6mL butylamine, and are carried out ultrasonic disperse and formed it into homogeneous solution, then again
0.1mmol cuprous iodide is added in above-mentioned solution, and the ethylene glycol that overall solution volume 12% is added is uniformly mixed to get arriving
Hole transmission layer precursor solution；
S2, the mesoporous layer slurry of 15 μ L is scratched on the hole transport layer, then in 100 DEG C of annealing 15min, thus in conductive substrates
Mesoporous layer is prepared；
Wherein, blade coating speed is 20mm/s, and scraper height is 40 μm；
The nano aluminium oxide aqueous dispersions are selected from the nano aluminium oxide aqueous dispersions of Aladdin (Aladdin) brand, aluminium oxide
Mass fraction be 20%, the partial sizes of nano alumina particles is 5-10nm；The mesoporous layer slurry aoxidizes aluminum water by Aladdin
Dispersion liquid is formed with nano titanium oxide powder mixed preparing, and the mass concentration of nano titanium oxide powder is 20mg/mL in mixed liquor,
The partial size of titanium oxide is 5-30nm；
S3, the mixed solution that 15 μ L indium sulphurs and perovskite are scratched on mesoporous layer, then in 100 DEG C of annealing 15min, thus
Indium sulphur-perovskite composite layer is obtained on mesoporous layer；
Wherein, blade coating speed is speed 15mm/s, and scraper height is 60 μm；
The preparation method of the mixed solution of the indium sulphur and perovskite are as follows: by the In (OAc) of 0.17mmol3, 0.18mmol
The thiocarbamide of CuI and 0.085mmol is dissolved into (solvent N, N- dimethyl in the perovskite solution that 0.8mL mass fraction is 40%
Formamide)；
S4, one layer of silver paste is brushed using the method for silk-screen printing in sample surfaces, and makes its solidification at 100 DEG C.
Gained solar battery is by measurement, in AM1.5,100mW/cm2Under the irradiation of etalon optical power, the electricity that is measured for it
Voltage curve is flowed, as shown in Figure 2；As shown in Figure 2, the open-circuit voltage 0.89V of solar cell sample, short circuit current 4.4mA are filled out
Fill the factor 0.35, efficiency 1.35%.
Embodiment 2
Coating preparation method, compared with Example 1, difference are scraped the present embodiment provides a kind of flexible perovskite solar battery
It is, the mass concentration of nano titanium oxide powder described in step S2 is 10mg/mL.
Remaining is all the same with embodiment 1.
Gained solar battery is by measurement, in AM1.5,100mW/cm2Under the irradiation of etalon optical power, the electricity that is measured for it
Voltage curve is flowed, as shown in Figure 3；From the figure 3, it may be seen that the open-circuit voltage 0.82V of solar cell sample, short circuit current 4.7mA are filled out
Fill the factor 0.31, efficiency 1.18%.
Embodiment 3
Coating preparation method, compared with Example 1, difference are scraped the present embodiment provides a kind of flexible perovskite solar battery
It is, the mass concentration of nano-powder described in step S2 is 30mg/mL.
Remaining is all the same with embodiment 1.
Gained solar battery is by measurement, in AM1.5,100mW/cm2Under the irradiation of etalon optical power, solar cell sample
Open-circuit voltage 0.85V, short circuit current 4.4mA, fill factor 0.30, efficiency 1.12%.
Embodiment 4
Coating preparation method, compared with Example 1, difference are scraped the present embodiment provides a kind of flexible perovskite solar battery
It is, CuInS described in step S12The preparation method of precursor solution is as follows: by 0.08mmol indium acetate, 0.4mmol thiocarbamide
It is dissolved in 0.4mL butylamine with 30 μ L propionic acid, and carries out ultrasonic disperse and form it into homogeneous solution, then again by 0.09mmol iodate
It is cuprous to be added in above-mentioned solution, and the ethylene glycol that overall solution volume 15% is added is uniformly mixed to get hole transmission layer forerunner is arrived
Liquid solution.
Remaining is all the same with embodiment 1.
Gained solar battery is by measurement, in AM1.5,100mW/cm2Under the irradiation of etalon optical power, solar cell sample
Open-circuit voltage 0.86V, short circuit current 4.2mA, fill factor 0.28, efficiency 1.01%.
Embodiment 5
Coating preparation method, compared with Example 1, difference are scraped the present embodiment provides a kind of flexible perovskite solar battery
It is, the preparation method of the mixed solution of indium sulphur described in step S3 and perovskite are as follows: by the In (OAc) of 0.085mmol3、
The thiocarbamide of the CuI and 0.043mmol of 0.09mmol are dissolved into the perovskite solution that 1.6mL mass fraction is 40%.
Remaining is all the same with embodiment 1.
Gained solar battery is by measurement, in AM1.5,100mW/cm2Under the irradiation of etalon optical power, solar cell sample
Open-circuit voltage 0.82V, short circuit current 4.3mA, fill factor 0.26, efficiency 0.92%.
Embodiment 6
Coating preparation method, compared with Example 1, difference are scraped the present embodiment provides a kind of flexible perovskite solar battery
It is, scraper height is respectively 30 μm, 60 μm, 80 μm in step S1-S3；Scraper speed be respectively 25mm/s, 25mm/s,
15mm/s。
Remaining is all the same with embodiment 1.
Gained solar battery is by measurement, in AM1.5,100mW/cm2Under the irradiation of etalon optical power, solar cell sample
Open-circuit voltage 0.88V, short circuit current 5.0mA, fill factor 0.26, efficiency 1.14%.
Embodiment 7
Coating preparation method, compared with Example 1, difference are scraped the present embodiment provides a kind of flexible perovskite solar battery
It is, step S5 brushes one layer of carbon using the method for silk-screen printing in sample surfaces and starches, and makes its solidification at 100 DEG C.
Remaining is all the same with embodiment 1.
Gained solar battery is by measurement, in AM1.5,100mW/cm2Under the irradiation of etalon optical power, solar cell sample
Open-circuit voltage 0.89V, short circuit current 3.5mA, fill factor 0.35, efficiency 1.09%.
Embodiment 8
Coating preparation method, compared with Example 1, difference are scraped the present embodiment provides a kind of flexible perovskite solar battery
It is, specifically, first coating electronic transport layer on a flexible substrate is then successively coated on the basis of electron transfer layer mesoporous
Layer, indium sulphur-perovskite composite layer, finally print carbon electrode.
S1, the solution that 20 μ electron transfer layers are scratched on flexible conducting substrate (2cm × 4cm) then anneal in 110 DEG C
10min, so that electron transfer layer be prepared on flexible conducting substrate；Wherein, blade coating speed is 20mm/s, scraper height
It is 35 μm；
The electron transfer layer precursor solution is [6.6]-phenyl-C61- methyl butyrate PCBM and/or [6.6]-phenyl-C71-
The chlorobenzene solution of methyl butyrate PCBM；The concentration of the electron transfer layer precursor solution is 20mg/ml；
S2, the mesoporous layer slurry of 15 μ L is scratched on the electron transport layer, then in 100 DEG C of annealing 15min, thus in conductive substrates
Mesoporous layer is prepared；Wherein, blade coating speed is 20mm/s, and scraper height is 50 μm；
The mesoporous layer slurry is formed by Aladdin aluminium oxide aqueous dispersions and nano titanium oxide powder mixed preparing, mixed liquor
The mass concentration of middle nano titanium oxide powder is 20mg/mL, and the partial size of titanium oxide is 5-30nm；
S3, the mixed solution that 15 μ L indium sulphurs and perovskite are scratched on mesoporous layer, then in 100 DEG C of annealing 15min, thus
Indium sulphur-perovskite composite layer is obtained on mesoporous layer；
Wherein, blade coating speed is speed 15mm/s, and scraper height is 80 μm；
The preparation method of the mixed solution of the indium sulphur and perovskite are as follows: by the In (OAc) of 0.17mmol3, 0.18mmol
The thiocarbamide of CuI and 0.085mmol is dissolved into (solvent N, N- dimethyl in the perovskite solution that 0.8mL mass fraction is 40%
Formamide)；
S4, one layer of carbon slurry is brushed using the method for silk-screen printing in sample surfaces, and makes its solidification at 110 DEG C.
Gained solar battery is by measurement, in AM1.5,100mW/cm2Under the irradiation of etalon optical power, solar cell sample
Open-circuit voltage 0.88V, short circuit current 3.2mA, fill factor 0.38, efficiency 1.07%.
Comparative example 1
Coating preparation method, compared with Example 1, difference are scraped the present embodiment provides a kind of flexible perovskite solar battery
It is, mesoporous layer described in step S2 is 20% by Aladdin nano aluminium oxide aqueous dispersions, the mass fraction of aluminium oxide, partial size
It is made for 5-10nm blade coating.
Gained solar battery is by measurement, in AM1.5,100mW/cm2Under the irradiation of etalon optical power, solar cell sample
Open-circuit voltage 0.75V, short circuit current 3mA, fill factor 0.26, efficiency 0.59%.
Comparative example 2
Coating preparation method, compared with Example 1, difference are scraped the present embodiment provides a kind of flexible perovskite solar battery
It is, the perovskite solution that mass fraction is 40% is scratched in step S3, does not add indium sulphur in perovskite.
Gained solar battery is by measurement, in AM1.5,100mW/cm2Under the irradiation of etalon optical power, solar cell sample
Open-circuit voltage 0.75V, short circuit current 3.8mA, fill factor 0.28, efficiency 0.80%.
Comparative example 3
Coating preparation method, compared with Example 1, difference are scraped the present embodiment provides a kind of flexible perovskite solar battery
It is, CuInS in step S12The preparation of precursor solution, does not add ethylene glycol solution.
Remaining is all the same with embodiment 1.
Gained solar battery is by measurement, in AM1.5,100mW/cm2Under the irradiation of etalon optical power, solar cell sample
Open-circuit voltage 0.75V, short circuit current 3.5mA, fill factor 0.26, efficiency 0.68%.
The above, only of the invention illustrates embodiment, not to the present invention in any form with substantial limitation,
It should be pointed out that for those skilled in the art, under the premise of not departing from the method for the present invention, that makes several changes
It also should be regarded as protection scope of the present invention into supplement；All those skilled in the art, do not depart from spirit of that invention and
In the case where range, using the equivalent variations of a little change, modification and differentiation that disclosed above technology contents are made, it is
Equivalent embodiment of the invention；Meanwhile any equivalent variations that all substantial technologicals according to the present invention do above-described embodiment
Change, modification and differentiation, still fall within protection scope of the present invention.
Claims (10)
1. a kind of flexibility perovskite solar battery scrapes coating preparation method, which is characterized in that the described method comprises the following steps:
Hole transmission layer, mesoporous layer, indium sulphur-perovskite composite layer are prepared in conductive substrates using knife coating, wherein the calcium titanium
Mine is CH3NH3PbI3；The mesoporous layer slurry is mixed by aluminium oxide aqueous dispersions with nano titanium oxide powder.
2. a kind of flexible perovskite solar battery according to claim 1 scrapes coating preparation method, which is characterized in that institute
The solid content for stating aluminium oxide aqueous dispersions is 20-25%, and the partial size of aluminium oxide particles is 5-10nm；Titanium oxide, the partial size of titanium oxide
For 5-30nm.
3. according to the method described in claim 2, it is characterized in that, the mass concentration of the nano titanium oxide powder is 20mg/
mL。
4. method according to claim 1 or 2, which is characterized in that the described method comprises the following steps:
S1, the precursor solution that hole transmission layer is scratched in conductive substrates, then in 90-100 DEG C of annealing 10-15min, thus
Hole transmission layer is prepared in conductive substrates；
Wherein, blade coating speed is 20-25mm/s, and scraper height is 20-50 μm；
S2, mesoporous layer slurry is scratched on the hole transport layer, then in 90-100 DEG C of annealing 10-15min, thus in conductive substrates
On mesoporous layer is prepared；
Wherein, blade coating speed is 20-25mm/s, and scraper height is 35-60 μm；
S3, the mixed solution that indium sulphur and perovskite are scratched on mesoporous layer, then in 90-100 DEG C of annealing 10-20min, thus
Indium sulphur-perovskite composite layer is obtained on mesoporous layer；
Wherein, blade coating speed is speed 15-20mm/s, and scraper height is 50-80 μm.
5. according to the method described in claim 4, it is characterized in that, the hole transmission layer is CuInS2Layer, the CuInS2Before
The preparation method for driving liquid solution is as follows: under nitrogen protection, by the indium acetate of every 0.08-0.12mmol, the sulphur of 0.4-0.6mmol
The propionic acid of urea and 30-50 μ are dissolved into the butylamine of 0.4-0.8mL, and carry out ultrasonic disperse, are formed homogeneous solution, are added
The CuI of 0.09-0.13mmol, obtains CuInS2Precursor solution.
6. according to the method described in claim 5, it is characterized in that, the CuInS2Precursor solution further includes ethylene glycol, described
The additive amount of ethylene glycol is CuInS2The 12-15% of precursor solution total volume.
7. according to the method described in claim 6, it is characterized in that, the preparation side of the mixed solution of the indium sulphur and perovskite
Method are as follows: by the In (OAc) of every 0.085-0.34mmol3, 0.09-0.36mmol CuI, 0.043-0.17mmol thiocarbamide dissolution
Into the n,N-Dimethylformamide solution of the perovskite of 0.4-1.6mL, the n,N-Dimethylformamide solution of the perovskite
The mass percent of middle perovskite is 20-40%.
8. being obtained the method according to the description of claim 7 is characterized in that further including preparing back electrode on the electron transport layer
Perovskite solar battery.
9. according to the method described in claim 8, it is characterized in that, the back electrode is any in metal electrode or carbon electrode
One or two kinds of combinations.
10. according to the method described in claim 9, it is characterized in that, the size of the conductive substrates is (2-10cm) × (2-
10cm)；The conductive substrates are the transparent polymeric film with indium tin oxide ITO.
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