CN110459684A - A kind of organic solar batteries preparation method based on solvent pairs collosol and gel ZnO cathode buffer layer - Google Patents
A kind of organic solar batteries preparation method based on solvent pairs collosol and gel ZnO cathode buffer layer Download PDFInfo
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- H—ELECTRICITY
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- H10K71/00—Manufacture or treatment specially adapted for the organic devices covered by this subclass
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Abstract
The present invention relates to a kind of organic solar batteries preparation methods based on solvent pairs collosol and gel ZnO cathode buffer layer, ZnO cathode buffer layer the preparation method comprises the following steps: at room temperature, the in the mixed solvent that zinc acetate and ethanol amine are dissolved in limonene and dimethoxy-ethanol is sufficiently dissolved, then the spin-coating film in pretreated substrate of glass is made annealing treatment to obtain ZnO cathode buffer layer.The preparation method improves the uniformity and compactness of cathode buffer layer.
Description
Technical field
The present invention relates to organic semiconductor thin-film technical field of solar batteries, and in particular to one kind is based on solvent pairs colloidal sol
The organic solar batteries preparation method of gel ZnO cathode buffer layer.
Background technique
The high speed development of modern society be unable to do without the energy, becomes urgently to be resolved to the effective exploitation and utilization of the energy and asks
Topic.At present most of energy for using in the world from fossil fuel exploitation, wherein mainly including petroleum, natural gas and coal
Deng.But on the one hand these resources are non-renewable, limited, and the use of another aspect fossil energy will cause very big ring
Border pollution, so finding new fungible energy source just at mankind's urgent problem to be solved.In view of solar energy have take no
To the greatest extent, nexhaustible, the characteristics of pollution, scientists from all over the world are asked using the development and utilization of solar energy as mankind's energy is solved
The breach of topic.
Now, the solar battery that the mankind use can be divided into inorganic solar energy according to the difference of device active layers material properties
Battery and organic solar batteries.Since development starting is early, research occupies in the application than wide inorganic solar cell
Leading position.But inorganic solar cell itself has its shortcoming, for example processing technology is extremely complex, material requirements is severe
Carve, be not easy to carry out large area flexible processing, certain materials have toxicity etc., these disadvantages limit inorganic solar cell into one
Step development.Compared with inorganic solar cell, the organic solar batteries based on organic semiconducting materials, not only have with it is inorganic
The identical highest theoretical light photoelectric transformation efficiency of solar battery, but also have light weight, can water-laid film, be capable of processing into special type
Shape is easily made flexible device, the significant advantages such as all plastic even may be implemented, and has become the hot spot studied both at home and abroad at present
One of.
Organic solar batteries generally use reciprocal form structure, as shown in Figure 1, from top to bottom successively are as follows: substrate, transparent
Conductive cathode, cathode buffer layer, active layer, anode buffer layer and metal anode layer.In research organic solar batteries photoelectricity effect
In numerous experiments of rate, cathode buffer layer mostly uses collosol and gel ZnO film.Currently, using spin coating work in solar cells
When skill prepares collosol and gel ZnO film as cathode buffer layer, the solvent generallyd use is dimethoxy-ethanol (C3H8O2), then
Cathode buffer layer film is formed by thermal annealing.There are some for the ZnO cathode buffer layer being prepared into using the above conventional method
Defect: ZnO precursor solution is always mingled with many bubbles in long agitation preparation process, these bubbles are unfavorable for subsequent
Spin-coating film；Meanwhile the gap between the ZnO particle of traditional handicraft film forming is larger, dispersion is uneven, defect easy to form, thus
The transmission of carrier is caused to be obstructed with separating；Further, anneal formation ZnO film interface it is more coarse, or even have naked eyes
Visible dot, so that device possesses higher Carrier recombination probability and biggish interface contact resistance, these all subtract significantly
Low device capture sunlight, the ability for transmitting photo-generated carrier, it is suppressed that the performance of entire device.
Therefore, how research, which optimizes, prepares collosol and gel ZnO film technique, and then prepares cathode buffering uniformly, fine and close
Layer, is one of emphasis and difficult point of current organic solar batteries area research.
Summary of the invention
Aiming at the problem that mentioning in background technique, it is slow based on solvent pairs collosol and gel ZnO cathode that the invention proposes one kind
The organic solar batteries preparation method for rushing layer improves the uniformity and compactness of cathode buffer layer.
To achieve the goals above, the present invention provides a kind of based on the organic of solvent pairs collosol and gel ZnO cathode buffer layer
Preparation method of solar battery, ZnO cathode buffer layer the preparation method comprises the following steps: at room temperature, zinc acetate and ethanol amine is molten
Sufficiently dissolved in the in the mixed solvent of limonene and dimethoxy-ethanol, then in pretreated substrate of glass spin coating at
Film is made annealing treatment to obtain ZnO cathode buffer layer.
Further, a kind of organic solar batteries preparation method based on solvent pairs collosol and gel ZnO cathode buffer layer,
Preparation method specifically includes the following steps:
(1) to ITO (tin indium oxide) substrate as composed by transparent substrates and ITO (tin indium oxide) transparent conductive cathode into
Row cleaning, with being dried with nitrogen after cleaning, for use；
(2) two kinds of solutes of zinc acetate and ethanol amine are dissolved in the limonene and diformazan that volume ratio is 1: 1~1: 9 at room temperature
Ethoxy-ethanol in the mixed solvent is stirred at room temperature after sufficiently dissolution by 2 hours and obtains ZnO (zinc oxide) precursor solution,
ZnO (zinc oxide) precursor solution is spin-coated on to ITO (tin indium oxide) substrate surface of step (1), after carrying out thermal anneal process
Obtain ZnO (zinc oxide) cathode buffer layer；
(3) while carrying out step (2), electron donor material PTB7 and electron acceptor material PC is prepared71The mixing of BM
Solution obtains active layer solution, and after sufficiently dissolving in thermal station, active layer solution is spin-coated on ZnO (oxygen using spin coating proceeding
Change zinc) cathode buffer layer surface, it is finally made annealing treatment to obtain active layer；
It (4) is 3 × 10 in vacuum degree3Under conditions of Pa, MoO is deposited in active layer surface3(molybdenum trioxide), obtains anode
Buffer layer；
(5) in anode buffer layer surface evaporation metal anode material, metal anode layer is obtained, is completed.
Further, the thermal anneal process in step (2) is using Thermostatic platform heating, baking oven heating, Far-infrared Heating, heat
One of wind heating is a variety of.
Further, the active layer solution in step (3) is by electron donor material PTB7 and electron acceptor material PC71BM is pressed
It is dissolved in 1ml chlorobenzene according to mass percent for 1: 5~5: 1, concentration is 10~30mg/ml.
Further, active layer solution is by electron donor material PTB7 and electron acceptor material PC71BM is according to quality hundred
Divide than being dissolved in 1ml chlorobenzene for 1: 1, the DIO (3- octadecyl -2- of 30ul is added in concentration 10mg/ml in mixed solution
[3- (3- octadecyl -2 (3H)-benzoxazoles -2- subunit) -1- propylene -1- base] benzoxazoles perchlorate).
Further, the metal anode material in step (5) is one of Ag, Al, Au or a variety of.
Further, the active layer thickness that step (3) obtains is 50~250nm, the anode buffer layer that the step 4 obtains
With a thickness of 10~20nm, the metal anode layer that the step 5 obtains is with a thickness of 100~200nm.
In conclusion compared with the prior art, the invention has the advantages that:
(1) present invention prepares the cathode buffer layer of organic solar batteries by using solvent pairs collosol and gel ZnO, due to
More affine limonene solvent is introduced in the solution system of collosol and gel ZnO, cathode buffer layer solute can dissolve more
Sufficiently, more rapidly, time cost is reduced；Simultaneously as limonene (C10H16) and two kinds of solvents of dimethoxy-ethanol between
It interacts, the bubble dissolved in collosol and gel ZnO solution is crushed evolution after assembling, and avoids bubble in subsequent spin coating process
In to active layer film forming interfere, can make in spin coating process without building-up effect.
(2) zinc acetate (Zn (CH will be dissolved using solvent pairs in the present invention3COO)2) and ethanol amine (C2H7NO) two kinds of solutes
Precursor solution is obtained, the glass basic surface with ITO that cleaning treatment is crossed is spin-coated on, is then made annealing treatment, is formed
Particle uniformly, fine and close, smooth cathode buffer layer film, whole process improves cathode buffer layer pattern, reduces roughness,
The defect for reducing film formation surface optimizes the contact between ZnO cathode buffer layer and active layer, reduces the contact between interface
Resistance also improves the transmittability of photo-generated carrier, improves short circuit current, finally improves entire organic solar batteries
Performance.
(3) present invention is by preparing organic solar batteries based on solvent pairs collosol and gel ZnO cathode buffer layer, for drawing
Second of the solvent limonene (C entered10H16), it is cheap, to be synthetically prepared process simple, it is more conducive to industrialized production.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the reciprocal form structure of organic solar batteries.
In the figure, it is marked as 1- substrate, 2- transparent conductive cathode ITO, 3-ZnO cathode buffer layer, 4- active layer, 5- anode are slow
Rush layer, 6- metal anode layer.
Specific embodiment
All features disclosed in this specification can be with any other than mutually exclusive feature and/or step
Mode combines.
In order to make those skilled in the art more fully understand technical solution of the present invention, below with reference to Fig. 1 and specifically
The present invention is described in further detail for embodiment.
Embodiment 1
A kind of organic solar batteries preparation method based on solvent pairs collosol and gel ZnO cathode buffer layer, preparation method
Specifically includes the following steps:
(1) to ITO (tin indium oxide) substrate as composed by transparent substrates and ITO (tin indium oxide) transparent conductive cathode into
Row cleaning, with being dried with nitrogen after cleaning, for use；
(2) two kinds of solutes of zinc acetate and ethanol amine are dissolved in the limonene and dimethoxy that volume ratio is 1: 1 at room temperature
In alcohol mixed solvent, it is stirred at room temperature after sufficiently dissolution by 2 hours and obtains ZnO (zinc oxide) precursor solution, by ZnO
(zinc oxide) precursor solution is spin-coated on ITO (tin indium oxide) substrate surface of step (1), obtains after carrying out thermal anneal process
ZnO (zinc oxide) cathode buffer layer；
(3) while carrying out step (2), electron donor material PTB7 and electron acceptor material PC is prepared71The mixing of BM
Solution obtains active layer solution, and after sufficiently dissolving in thermal station, active layer solution is spin-coated on ZnO (oxygen using spin coating proceeding
Change zinc) cathode buffer layer surface, it is finally made annealing treatment to obtain active layer；
It (4) is 3 × 10 in vacuum degree3Under conditions of pa, MoO is deposited in active layer surface3(molybdenum trioxide), obtains anode
Buffer layer:
(5) in anode buffer layer surface evaporation metal anode material, metal anode layer is obtained, is completed.
Embodiment 2
A kind of organic solar batteries preparation method based on solvent pairs collosol and gel ZnO cathode buffer layer, preparation method
Specifically includes the following steps:
(1) to ITO (tin indium oxide) substrate as composed by transparent substrates and ITO (tin indium oxide) transparent conductive cathode into
Row cleaning, with being dried with nitrogen after cleaning, for use；
(2) two kinds of solutes of zinc acetate and ethanol amine are dissolved in the limonene and dimethoxy that volume ratio is 1: 2 at room temperature
In alcohol mixed solvent, it is stirred at room temperature after sufficiently dissolution by 2 hours and obtains ZnO (zinc oxide) precursor solution, by ZnO
(zinc oxide) precursor solution is spin-coated on ITO (tin indium oxide) substrate surface of step (1), obtains after carrying out thermal anneal process
ZnO (zinc oxide) cathode buffer layer；
(3) while carrying out step (2), electron donor material PTB7 and electron acceptor material PC is prepared71The mixing of BM
Solution obtains active layer solution, and after sufficiently dissolving in thermal station, active layer solution is spin-coated on ZnO (oxygen using spin coating proceeding
Change zinc) cathode buffer layer surface, it is finally made annealing treatment to obtain active layer；
It (4) is 3 × 10 in vacuum degree3Under conditions of pa, MoO is deposited in active layer surface3(molybdenum trioxide), obtains anode
Buffer layer；
(5) in anode buffer layer surface evaporation metal anode material, metal anode layer is obtained, is completed.
Embodiment 3
A kind of organic solar batteries preparation method based on solvent pairs collosol and gel ZnO cathode buffer layer, preparation method
Specifically includes the following steps:
(1) to ITO (tin indium oxide) substrate as composed by transparent substrates and ITO (tin indium oxide) transparent conductive cathode into
Row cleaning, with being dried with nitrogen after cleaning, for use；
(2) two kinds of solutes of zinc acetate and ethanol amine are dissolved in the limonene and dimethoxy that volume ratio is 1: 3 at room temperature
In alcohol mixed solvent, it is stirred at room temperature after sufficiently dissolution by 2 hours and obtains ZnO (zinc oxide) precursor solution, by ZnO
(zinc oxide) precursor solution is spin-coated on ITO (tin indium oxide) substrate surface of step (1), obtains after carrying out thermal anneal process
ZnO (zinc oxide) cathode buffer layer；
(3) while carrying out step (2), electron donor material PTB7 and electron acceptor material PC is prepared71The mixing of BM
Solution obtains active layer solution, and after sufficiently dissolving in thermal station, active layer solution is spin-coated on ZnO (oxygen using spin coating proceeding
Change zinc) cathode buffer layer surface, it is finally made annealing treatment to obtain active layer；
It (4) is 3 × 10 in vacuum degree3Under conditions of pa, MoO is deposited in active layer surface3(molybdenum trioxide), obtains anode
Buffer layer；
(5) in anode buffer layer surface evaporation metal anode material, metal anode layer is obtained, is completed.
Embodiment 4
A kind of organic solar batteries preparation method based on solvent pairs collosol and gel ZnO cathode buffer layer, preparation method
Specifically includes the following steps:
(1) to ITO (tin indium oxide) substrate as composed by transparent substrates and ITO (tin indium oxide) transparent conductive cathode into
Row cleaning, with being dried with nitrogen after cleaning, for use；
(2) two kinds of solutes of zinc acetate and ethanol amine are dissolved in the limonene and dimethoxy that volume ratio is 1:4 at room temperature
In alcohol mixed solvent, it is stirred at room temperature after sufficiently dissolution by 2 hours and obtains ZnO (zinc oxide) precursor solution, by ZnO
(zinc oxide) precursor solution is spin-coated on ITO (tin indium oxide) substrate surface of step (1), obtains after carrying out thermal anneal process
ZnO (zinc oxide) cathode buffer layer；
(3) while carrying out step (2), electron donor material PTB7 and electron acceptor material PC is prepared71The mixing of BM
Solution obtains active layer solution, and after sufficiently dissolving in thermal station, active layer solution is spin-coated on ZnO (oxygen using spin coating proceeding
Change zinc) cathode buffer layer surface, it is finally made annealing treatment to obtain active layer；
It (4) is 3 × 10 in vacuum degree3Under conditions of Pa, MoO is deposited in active layer surface3(molybdenum trioxide), obtains anode
Buffer layer；
(5) in anode buffer layer surface evaporation metal anode material, metal anode layer is obtained, is completed.
Embodiment 5
A kind of organic solar batteries preparation method based on solvent pairs collosol and gel ZnO cathode buffer layer, preparation method
Specifically includes the following steps:
(1) to ITO (tin indium oxide) substrate as composed by transparent substrates and ITO (tin indium oxide) transparent conductive cathode into
Row cleaning, with being dried with nitrogen after cleaning, for use；
(2) two kinds of solutes of zinc acetate and ethanol amine are dissolved in the limonene and dimethoxy that volume ratio is 1:5 at room temperature
In alcohol mixed solvent, it is stirred at room temperature after sufficiently dissolution by 2 hours and obtains ZnO (zinc oxide) precursor solution, by ZnO
(zinc oxide) precursor solution is spin-coated on ITO (tin indium oxide) substrate surface of step (1), obtains after carrying out thermal anneal process
ZnO (zinc oxide) cathode buffer layer；
(3) while carrying out step (2), electron donor material PTB7 and electron acceptor material PC is prepared71The mixing of BM
Solution obtains active layer solution, and after sufficiently dissolving in thermal station, active layer solution is spin-coated on ZnO (oxygen using spin coating proceeding
Change zinc) cathode buffer layer surface, it is finally made annealing treatment to obtain active layer；
It (4) is 3 × 10 in vacuum degree3Under conditions of Pa, MoO is deposited in active layer surface3(molybdenum trioxide), obtains anode
Buffer layer；
(5) in anode buffer layer surface evaporation metal anode material, metal anode layer is obtained, is completed.
Embodiment 6
A kind of organic solar batteries preparation method based on solvent pairs collosol and gel ZnO cathode buffer layer, preparation method
Specifically includes the following steps:
(1) to ITO (tin indium oxide) substrate as composed by transparent substrates and ITO (tin indium oxide) transparent conductive cathode into
Row cleaning, with being dried with nitrogen after cleaning, for use；
(2) two kinds of solutes of zinc acetate and ethanol amine are dissolved in the limonene and dimethoxy that volume ratio is 1:6 at room temperature
In alcohol mixed solvent, it is stirred at room temperature after sufficiently dissolution by 2 hours and obtains ZnO (zinc oxide) precursor solution, by ZnO
(zinc oxide) precursor solution is spin-coated on ITO (tin indium oxide) substrate surface of step (1), obtains after carrying out thermal anneal process
ZnO (zinc oxide) cathode buffer layer；
(3) while carrying out step (2), electron donor material PTB7 and electron acceptor material PC is prepared71The mixing of BM
Solution obtains active layer solution, and after sufficiently dissolving in thermal station, active layer solution is spin-coated on ZnO (oxygen using spin coating proceeding
Change zinc) cathode buffer layer surface, it is finally made annealing treatment to obtain active layer；
It (4) is 3 × 10 in vacuum degree3Under conditions of pa, MoO is deposited in active layer surface3(molybdenum trioxide), obtains anode
Buffer layer；
(5) in anode buffer layer surface evaporation metal anode material, metal anode layer is obtained, is completed.
Embodiment 7
A kind of organic solar batteries preparation method based on solvent pairs collosol and gel ZnO cathode buffer layer, preparation method
Specifically includes the following steps:
(1) to ITO (tin indium oxide) substrate as composed by transparent substrates and ITO (tin indium oxide) transparent conductive cathode into
Row cleaning, with being dried with nitrogen after cleaning, for use；
(2) two kinds of solutes of zinc acetate and ethanol amine are dissolved in the limonene and dimethoxy that volume ratio is 1: 7 at room temperature
In alcohol mixed solvent, it is stirred at room temperature after sufficiently dissolution by 2 hours and obtains ZnO (zinc oxide) precursor solution, by ZnO
(zinc oxide) precursor solution is spin-coated on ITO (tin indium oxide) substrate surface of step (1), obtains after carrying out thermal anneal process
ZnO (zinc oxide) cathode buffer layer；
(3) while carrying out step (2), electron donor material PTB7 and electron acceptor material PC is prepared71The mixing of BM
Solution obtains active layer solution, and after sufficiently dissolving in thermal station, active layer solution is spin-coated on ZnO (oxygen using spin coating proceeding
Change zinc) cathode buffer layer surface, it is finally made annealing treatment to obtain active layer；
It (4) is 3 × 10 in vacuum degree3Under conditions of pa, MoO is deposited in active layer surface3(molybdenum trioxide), obtains anode
Buffer layer；
(5) in anode buffer layer surface evaporation metal anode material, metal anode layer is obtained, is completed.
Embodiment 8
A kind of organic solar batteries preparation method based on solvent pairs collosol and gel ZnO cathode buffer layer, preparation method
Specifically includes the following steps:
(1) to ITO (tin indium oxide) substrate as composed by transparent substrates and ITO (tin indium oxide) transparent conductive cathode into
Row cleaning, with being dried with nitrogen after cleaning, for use；
(2) two kinds of solutes of zinc acetate and ethanol amine are dissolved in the limonene and dimethoxy that volume ratio is 1: 8 at room temperature
In alcohol mixed solvent, it is stirred at room temperature after sufficiently dissolution by 2 hours and obtains ZnO (zinc oxide) precursor solution, by ZnO
(zinc oxide) precursor solution is spin-coated on ITO (tin indium oxide) substrate surface of step (1), obtains after carrying out thermal anneal process
ZnO (zinc oxide) cathode buffer layer；
(3) while carrying out step (2), electron donor material PTB7 and electron acceptor material PC is prepared71The mixing of BM
Solution obtains active layer solution, and after sufficiently dissolving in thermal station, active layer solution is spin-coated on ZnO (oxygen using spin coating proceeding
Change zinc) cathode buffer layer surface, it is finally made annealing treatment to obtain active layer；
It (4) is 3 × 10 in vacuum degree3Under conditions of pa, MoO is deposited in active layer surface3(molybdenum trioxide), obtains anode
Buffer layer；
(5) in anode buffer layer surface evaporation metal anode material, metal anode layer is obtained, is completed.
Embodiment 9
A kind of organic solar batteries preparation method based on solvent pairs collosol and gel ZnO cathode buffer layer, preparation method
Specifically includes the following steps:
(1) to ITO (tin indium oxide) substrate as composed by transparent substrates and ITO (tin indium oxide) transparent conductive cathode into
Row cleaning, with being dried with nitrogen after cleaning, for use；
(2) two kinds of solutes of zinc acetate and ethanol amine are dissolved in the limonene and dimethoxy that volume ratio is 1: 9 at room temperature
In alcohol mixed solvent, it is stirred at room temperature after sufficiently dissolution by 2 hours and obtains ZnO (zinc oxide) precursor solution, by ZnO
(zinc oxide) precursor solution is spin-coated on ITO (tin indium oxide) substrate surface of step (1), obtains after carrying out thermal anneal process
ZnO (zinc oxide) cathode buffer layer；
(3) while carrying out step (2), electron donor material PTB7 and electron acceptor material PC is prepared71The mixing of BM
Solution obtains active layer solution, and after sufficiently dissolving in thermal station, active layer solution is spin-coated on ZnO (oxygen using spin coating proceeding
Change zinc) cathode buffer layer surface, it is finally made annealing treatment to obtain active layer；
It (4) is 3 × 10 in vacuum degree3Under conditions of Pa, MoO is deposited in active layer surface3(molybdenum trioxide), obtains anode
Buffer layer:
(5) in anode buffer layer surface evaporation metal anode material, metal anode layer is obtained, is completed.
The organic solar batteries that above embodiments 1-9 the is obtained, (AM 1.5,100mW/cm under standard test condition2),
According to the difference of two kinds of solvent burden ratios in collosol and gel ZnO cathode buffer layer solution, the open-circuit voltage (V of device is measuredOC), short circuit
Electric current (JSC), fill factor (FF), photoelectric conversion efficiency (PCE) it is different, the data measured are as shown in the table.
| Two kinds of solvent burden ratios | VOC(V) | JSC(mA/cm2) | FF | PCE (%) |
| 1∶5 | 0.77 | 15.62 | 0.65 | 7.82 |
| 1∶1 | 0.70 | 12.26 | 0.60 | 5.15 |
| 1∶2 | 0.71 | 12.78 | 0.61 | 5.54 |
| 1∶3 | 0.75 | 13.20 | 0.63 | 6.23 |
| 1∶4 | 0.77 | 14.41 | 0.64 | 7.10 |
| 1∶6 | 0.77 | 14.70 | 0.64 | 7.24 |
| 1∶7 | 0.76 | 14.02 | 0.62 | 6.61 |
| 1∶8 | 0.76 | 13.50 | 0.62 | 6.36 |
| 1∶9 | 0.75 | 13.30 | 0.61 | 6.08 |
Comparative example
Referring to Fig.1, existing organic solar batteries the preparation method comprises the following steps:
Step 1: being less than the ITO base as composed by transparent substrates 1 and transparent conductive cathode 2 of 1nm to surface roughness
Plate is cleaned, with being dried with nitrogen after cleaning；
Step 2: by zinc acetate (Zn (CH3COO)2) and ethanol amine (C2H7NO) two kinds of solutes are dissolved in dimethoxy-ethanol
(C3H8O2) in solvent, ZnO precursor solution is obtained after stirring and dissolving 12 hours in 60 DEG C of thermal station, by ZnO precursor solution
It is spin-coated on the ito substrate surface of step 1, obtains ZnO cathode buffer layer 3 after carrying out thermal anneal process (150 DEG C, 30min)；
Step 3: while carrying out step 2, the PBT7 of 90 DEG C, 800r processed 6 hours will be passed through in thermal station:
PC71After BM active layer solution is spin-coated on 3 surface of ZnO cathode buffer layer (1200rpm, 90s), made annealing treatment to obtain with a thickness of
The active layer 4 of 120nm, the PTB7:PC71BM active layer solution is by electron donor material PTB7 and electron acceptor material PC71BM
It mixes, is dissolved in 1ml chlorobenzene by 1: 1 mass percent, concentration 25mg/ml；
Step 4: MoO is deposited on 4 surface of active layer3, obtain the anode buffer layer 5 with a thickness of 15nm；
Step 5: in 5 surface evaporation metal anode material Ag of anode buffer layer, obtain with a thickness of 100nm metal anode layer 6,
It completes.
The organic solar batteries that above-mentioned existing preparation method the obtains, (AM 1.5,100mW/ under standard test condition
cm2), measure the open-circuit voltage (V of deviceOC)=0.75V, short circuit current (JSC)=13.27mA/cm2, fill factor (FF)=
0.61, photoelectric conversion efficiency (PCE)=6.07%.
It can be seen that in summary, the cathode of organic solar batteries prepared by using solvent pairs collosol and gel ZnO solution
Buffer layer, in the suitable situation of solvent pairs ratio (1: 5), compared to the device of existing method preparation, photovoltaic performance parameter is equal
It is substantially improved.
Due to introducing limonene (C in the solution system of collosol and gel ZnO10H16) solvent, cathode buffer layer solute energy
What is enough dissolved is more abundant, rapider, reduces time cost；Simultaneously as limonene (C10H16) and two kinds of dimethoxy-ethanol
Interaction between solvent, a small amount of bubble dissolved in collosol and gel ZnO solution are crushed evolution after assembling, avoid bubble
Active layer film forming is interfered in subsequent spin coating process, can be made in spin coating process without building-up effect.
It is uniform, fine and close, smooth to form particle for the method for preparing cathode buffer layer using solvent pairs collosol and gel ZnO solution
Cathode buffer layer film, whole process improves active layer pattern, reduces roughness, reduce the defects of active layer,
Contact of the ZnO cathode buffer layer with active layer is optimized, the contact resistance between interface is reduced, short circuit current is improved, also mentions
The high separation probability of light-generated excitons, finally improves the performance of entire organic solar batteries.Also, for the second of introducing
Kind solvent limonene (C10H16), it is cheap, to be synthetically prepared process simple, it is more conducive to industrialized production.
The specific embodiment of the application above described embodiment only expresses, the description thereof is more specific and detailed, but simultaneously
The limitation to the application protection scope therefore cannot be interpreted as.It should be pointed out that for those of ordinary skill in the art
For, under the premise of not departing from technical scheme design, various modifications and improvements can be made, these belong to this
The protection scope of application.
Claims (7)
1. a kind of organic solar batteries preparation method based on solvent pairs collosol and gel ZnO cathode buffer layer, which is characterized in that
ZnO cathode buffer layer the preparation method comprises the following steps: at room temperature, zinc acetate and ethanol amine are dissolved in limonene and dimethoxy second
The in the mixed solvent of alcohol sufficiently dissolves, and then the spin-coating film in pretreated substrate of glass, is made annealing treatment to obtain ZnO
Cathode buffer layer.
2. a kind of organic solar batteries based on solvent pairs collosol and gel ZnO cathode buffer layer according to claim 1
Preparation method, which is characterized in that preparation method specifically includes the following steps:
(1) ito substrate as composed by transparent substrates and transparent conductive cathode is cleaned, with being dried with nitrogen after cleaning,
For use；
(2) two kinds of solutes of zinc acetate and ethanol amine are dissolved in the limonene and dimethoxy that volume ratio is 1: 1~1: 9 at room temperature
In alcohol mixed solvent, it is stirred at room temperature after sufficiently dissolution by 2 hours and obtains ZnO precursor solution, ZnO precursor is molten
Liquid is spin-coated on the ito substrate surface of step (1), obtains ZnO cathode buffer layer after carrying out thermal anneal process；
(3) while carrying out step (2), electron donor material PTB7 and electron acceptor material PC is prepared71The mixed solution of BM,
Active layer solution is obtained, after sufficiently dissolving in thermal station, active layer solution is spin-coated on by ZnO cathode buffering using spin coating proceeding
Layer surface is finally made annealing treatment to obtain active layer；
It (4) is 3 × 10 in vacuum degree3Under conditions of pa, MoO is deposited in active layer surface3, obtain anode buffer layer；
(5) in anode buffer layer surface evaporation metal anode material, metal anode layer is obtained, is completed.
3. a kind of organic solar batteries based on solvent pairs collosol and gel ZnO cathode buffer layer according to claim 2
Preparation method, which is characterized in that the thermal anneal process in step (2) is added using Thermostatic platform heating, baking oven heating, far infrared
One of heat, Hot-blast Heating are a variety of.
4. a kind of organic solar batteries based on solvent pairs collosol and gel ZnO cathode buffer layer according to claim 2
Preparation method, which is characterized in that the active layer solution in step (3) is by electron donor material PTB7 and electron acceptor material
PC71BM is dissolved in 1ml chlorobenzene according to mass percent for 1: 5~5: 1, and concentration is 10~30mg/ml.
5. a kind of organic solar electricity based on solvent pairs collosol and gel ZnO cathode buffer layer according to claim 2 or 4
Pool preparation method, which is characterized in that active layer solution is by electron donor material PTB7 and electron acceptor material PC71BM is according to quality
Percentage is to be dissolved in 1ml chlorobenzene at 1: 1, concentration 10mg/ml, and the DIO of 30ul is added in mixed solution.
6. a kind of organic solar batteries based on solvent pairs collosol and gel ZnO cathode buffer layer according to claim 2
Preparation method, which is characterized in that the metal anode material in step (5) is one of Ag, Al, Au or a variety of.
7. a kind of organic solar batteries based on solvent pairs collosol and gel ZnO cathode buffer layer according to claim 2
Preparation method, which is characterized in that the active layer thickness that step (3) obtains is 50~250nm, and the anode that the step 4 obtains is slow
Layer is rushed with a thickness of 10~20nm, the metal anode layer that the step 5 obtains is with a thickness of 100~200nm.
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| CN105470398A (en) * | 2015-11-26 | 2016-04-06 | 电子科技大学 | Ternary-composite cathode buffer layer-based organic thin film solar cell and preparation method thereof |
| CN109873081A (en) * | 2019-03-21 | 2019-06-11 | 南京邮电大学 | A kind of organic photovoltaic battery and preparation method thereof based on organic/inorganic diffusion boundary layer |
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| EP2450908A2 (en) * | 2010-08-13 | 2012-05-09 | Samsung Electronics Co., Ltd. | Conductive paste, electrode and electronic device and solar cell including an electrode formed using the conductive paste |
| CN104241530A (en) * | 2014-09-30 | 2014-12-24 | 电子科技大学 | Organic thin-film solar cell on basis of water-soluble copolymers |
| CN105470398A (en) * | 2015-11-26 | 2016-04-06 | 电子科技大学 | Ternary-composite cathode buffer layer-based organic thin film solar cell and preparation method thereof |
| CN109873081A (en) * | 2019-03-21 | 2019-06-11 | 南京邮电大学 | A kind of organic photovoltaic battery and preparation method thereof based on organic/inorganic diffusion boundary layer |
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