CN110504365A - A kind of photoactive layer, ternary organic solar batteries including the photoactive layer and its preparation method and application - Google Patents
A kind of photoactive layer, ternary organic solar batteries including the photoactive layer and its preparation method and application Download PDFInfo
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- CN110504365A CN110504365A CN201910807913.7A CN201910807913A CN110504365A CN 110504365 A CN110504365 A CN 110504365A CN 201910807913 A CN201910807913 A CN 201910807913A CN 110504365 A CN110504365 A CN 110504365A
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K30/00—Organic devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation
- H10K30/451—Organic devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation comprising a metal-semiconductor-metal [m-s-m] structure
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K85/00—Organic materials used in the body or electrodes of devices covered by this subclass
- H10K85/60—Organic compounds having low molecular weight
- H10K85/615—Polycyclic condensed aromatic hydrocarbons, e.g. anthracene
- H10K85/624—Polycyclic condensed aromatic hydrocarbons, e.g. anthracene containing six or more rings
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
- Y02E10/549—Organic PV cells
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Abstract
The present invention provides a kind of photoactive layer, ternary organic solar batteries including the photoactive layer and its preparation method and application.The present invention uses tertiary blending device architecture, compensates for the problem that spectrum extinction deficiency in device is blended in binary.The third component IOIC-2Cl that the present invention introduces ultralow bandwidth on the basis of binary blend components PBDB-T-2Cl:ITC-2Cl achieves highest short-circuit current density J through device optimization as accessory receptorSC=22.35mA cm‑2, highest battery efficiency PCE=14.75%, China National Measuring Science Research Inst. authentication efficiency PCE=13.78% have huge potential using value in photoelectric field to greatly improve it in photoelectric field application range.
Description
Technical field
The invention belongs to organic compound device preparation technical fields, and in particular to a kind of photoactive layer including the light are living
The ternary organic solar batteries and its preparation method and application of property layer.
Background technique
Disclosing the information of the background technology part, it is only intended to increase understanding of the overall background of the invention, without certainty
It is considered as recognizing or implying in any form that information composition has become existing skill well known to persons skilled in the art
Art.
In recent years, in face of the energy crisis of growing tension, the ecological environment constantly deteriorated, development green, sustainable development
New energy become the important selection of the mankind.The earth can create generation with only the 1/2200000000 of solar radiation energy
Boundary's all things on earth, therefore develop and use solar energy and be undoubtedly excellent energy approach.And solar battery is to convert light into for electric current, is
A kind of photoelectric conversion.The scientist of AT&T Labs, the U.S. in 1954 prepares practical inorganic solar cell, is mankind's benefit
The milestone of electric energy is converted directly into solar energy.Then, this technology is fast-developing and spreads.But this kind of battery is deposited
Cost is high, processing complexity, the defect outstanding such as operation cost height, it is limited in the application of numerous areas.Therefore, it seeks
New solar cell material is looked for, has seemed very urgent.
Recently, there is weight by the body heterojunction organic solar batteries that conjugated polymer donor and small molecule receptor form
Measure it is light, translucent, can large area printing processing, low cost the advantages that and attract attention, be the important hair of next-generation photovoltaic technology
Open up target.The research of organic solar batteries can trace back to the early stage fifties in last century, and photoactive layer only included single at that time
Organic semiconductor component, and electric field provided by the electrode of different work functions cannot provide enough drivings for exciton disassociation
Power, therefore cause photoelectric efficiency (PCE) lower, about 1%.In order to solve this problem, scientist Heeger is equal to nineteen ninety-five
Propose donor-acceptor heterojunction structure, the energy level offset of donor and receptor provides driving force, widened confession for separation of charge
Body/acceptor interface effectively promotes this process, and the structure of this device makes the generation of carrier be distributed in entire photolytic activity
In layer, it is assumed that continuous passage can be formed between both material interfaces and electrode, then the carrier generated is by continuously leading to
Road reaches and forms photoelectric current on electrode.Currently, the development that the organic solar batteries of this structure are at full speed, device efficiency are more than
13%.But the binary composition based on donor and receptor is difficult to cover visible and near infrared spectrum, causes electric current relatively low.
In recent years, it is close to have been realized in high short circuit current for ternary system structure (including donor, receptor and third component)
Degree, to overcome the limitation of binary system to provide effective approach.For example, the material of different band gap can obtain complementary light
Harvest；The doping of high dielectric constant can promote exciton disassociation；Charge transport can be enhanced in the component of high mobility；High mobility
Component the form of photoactive layer can be enhanced.In various ternary mixed strategies, absorbed with near-infrared (NIR) is utilized
Three components are most to be hopeful to improve efficiency.NIR absorbent components are not limited to donor and receptor, by being matched with donor and receptor,
It realizes panchromatic absorption, is conducive to further provide for short-circuit current density (JSC) and photoelectric conversion efficiency.But inventors have found that mesh
The preceding organic solar batteries efficiency based on ternary system be more than 14% combination it is seldom, efficiency is still in urgent need to be improved.
Summary of the invention
For the above-mentioned prior art, through long-term technology and practical exploration, the present invention provides a kind of photoactive layer including
Ternary organic solar batteries of the photoactive layer and its preparation method and application.Photoactive layer is living based on chlorination light in the present invention
The novel organic ternary system construction of property material forms, and the receptoroid preparation method is simple, mild condition, while being prepared
Organic receptor achieves short-circuit current density J after being assembled into solar cell device, through device optimizationSC=22.35mA
cm-2, battery efficiency PCE=14.75%, China National Measuring Science Research Inst. authentication efficiency PCE=13.78%, to greatly mention
It is high its in photoelectric field application range, the value with good practical application.
The present invention is achieved through the following technical solutions:
The first aspect of the invention provides a kind of photoactive layer comprising electron donor and electron acceptor.
The electron donor is PBDB-T-2Cl, and structural formula is as follows:
Wherein, the PBDB-T-2Cl can be obtained in commercialization channel purchase.
The receptor includes major receptors ITC-2Cl and accessory receptor IOIC-2Cl, wherein
The major receptors ITC-2Cl structural formula is as follows:
The accessory receptor IOIC-2Cl structural formula is as follows:
Wherein, the R in ITC-2Cl and IOIC-2Cl2Selected from hydrogen atom, alkyl and alkoxy.
The second aspect of the invention provides application of the above-mentioned photoactive layer in preparation ternary organic solar batteries.
The third aspect of the invention provides a kind of ternary organic solar batteries comprising: first electrode；It is set as
The second electrode opposite with first electrode；And it is set to the photoactive layer between first electrode and second electrode, wherein light is living
Property layer includes electron donor and electron acceptor.
The fourth aspect of the invention provides the method for manufacturing ternary organic solar batteries, which comprises
Prepare substrate；First electrode is formed in the region of substrate；The organic material including photoactive layer is formed on the top of first electrode
Layer；And second electrode is formed on the top of organic material layer, wherein light photoactive layer includes electron donor and electron acceptor.
The fifth aspect of the invention provides application of the ternary organic solar batteries in photoelectric field.
Beneficial effects of the present invention:
The present invention uses tertiary blending device architecture, compensates for the problem that spectrum extinction deficiency in device is blended in binary.This
Invention introduces ultralow band on the basis of binary blend components broad-band gap donor PBDB-T-2Cl and narrow band gap acceptor ITC-2Cl
Wide third component IOIC-2Cl achieves highest short-circuit current density J through device optimization as accessory receptorSC=22.35mA
cm-2, highest battery efficiency PCE=14.75%, China National Measuring Science Research Inst. authentication efficiency PCE=13.78%, the present invention makes
To the strategy using ultra-narrow forbidden band provide deeper into understanding, while greatly improving it in photoelectric field application model
It encloses, there is huge potential using value in photoelectric field.
Detailed description of the invention
The Figure of description for constituting a part of the invention is used to provide further understanding of the present invention, and of the invention shows
Examples and descriptions thereof are used to explain the present invention for meaning property, does not constitute improper limitations of the present invention.
Fig. 1 is the hydrogen spectrogram for the ITC-2Cl that the present invention synthesizes；
Fig. 2 is the hydrogen spectrogram for the IOIC-2Cl that the present invention synthesizes；
Fig. 3 is the solid ultravioletvisible absorption figure of tri- kinds of components of PBDB-T-2Cl, ITC-2Cl and IOIC-2Cl of the present invention；
Fig. 4 is the dichloromethane solution ultravioletvisible absorption figure that 3-6 of the embodiment of the present invention prepares photoactive layer product；
Fig. 5 is the current -voltage curve figure that 3-6 of the embodiment of the present invention prepares ternary organic solar batteries device；
Fig. 6 is the EQE figure that 3-6 of the embodiment of the present invention prepares ternary organic solar batteries device.
Specific embodiment
It is noted that following detailed description is all illustrative, it is intended to provide further instruction to the present invention.Unless another
It indicates, all technical and scientific terms used herein has usual with general technical staff of the technical field of the invention
The identical meanings of understanding.
It should be noted that term used herein above is merely to describe specific embodiment, and be not intended to restricted root
According to exemplary embodiments of the present invention.As used herein, unless the context clearly indicates otherwise, otherwise singular
Also it is intended to include plural form, additionally, it should be understood that, when in the present specification using term "comprising" and/or " packet
Include " when, indicate existing characteristics, step, operation, device, component and/or their combination.It should be understood that protection model of the invention
It encloses and is not limited to following specific specific embodiments；It is also understood that term used in the embodiment of the present invention is to retouch
Specific specific embodiment is stated, rather than limiting the scope of protection of the present invention.
In conjunction with specific example, the present invention is further illustrated, and following instance is not right merely to the explanation present invention
Its content is defined.If the experiment actual conditions being not specified in embodiment, usually according to normal condition, or according to reagent public affairs
Take charge of recommended condition；Reagent as used in the following examples, consumptive material etc., are commercially available unless otherwise specified.
As previously mentioned, the organic solar batteries efficiency of ternary system is still to be improved at present.
In view of this, providing a kind of photoactive layer in an exemplary embodiment of the invention comprising electron donor and
Electron acceptor.
The electron donor is PBDB-T-2Cl, and structural formula is as follows:
The PBDB-T-2Cl can be obtained in commercialization channel purchase.
The receptor includes major receptors ITC-2Cl and accessory receptor IOIC-2Cl, wherein
The major receptors ITC-2Cl structural formula is as follows:
The accessory receptor IOIC-2Cl structural formula is as follows:
Wherein, the R in ITC-2Cl and IOIC-2Cl2Independently selected from hydrogen atom, alkyl and alkoxy.
In still another embodiment of the invention, R2Alkyl and C1~C22 independently selected from hydrogen atom, C1~C20
Alkoxy.
In still another embodiment of the invention, R2Selected from-C6H13。
In still another embodiment of the invention, it is different that the electron acceptor and electron donor of photoactive layer can form ontology
Matter knot (BHJ).
In still another embodiment of the invention, photoactive layer with a thickness of 50-300nm.
In still another embodiment of the invention, the mass ratio of electron donor and electron acceptor is 1:0.5-5.
In still another embodiment of the invention, the mass ratio 1:1 of electron donor and electron acceptor.
In still another embodiment of the invention, in the electron acceptor, the mass ratio of ITC-2Cl and IOIC-2Cl are
1~0:0~1 (preferably 0.7:0.3).
In still another embodiment of the invention, above-mentioned photoactive layer is provided in preparation ternary organic solar batteries
Application.
In still another embodiment of the invention, a kind of ternary organic solar batteries are provided comprising: the first electricity
Pole；It is set as the second electrode opposite with first electrode；And it is set to the photoactive layer between first electrode and second electrode,
Wherein photoactive layer includes electron donor and electron acceptor.Herein to the explanation of photoactive layer, electron donor and electron acceptor with
It is described above identical.
In still another embodiment of the invention, ternary organic solar batteries are between first electrode and photoactive layer
It further include the one or more of hole transmission layer and hole injection layer.
In still another embodiment of the invention, ternary organic solar batteries are between second electrode and photoactive layer
It further include electron transfer layer or hole transmission layer.
In still another embodiment of the invention, first electrode can be anode electrode or cathode electrode, in addition, second
Electrode can be cathode electrode or anode electrode.
It, can be living with anode electrode, light in ternary organic solar batteries in still another embodiment of the invention
Property layer and cathode this sequence arrangement, or with cathode electrode, photoactive layer and this sequence arrangement of anode electrode, but sequence is simultaneously
It is without being limited thereto.
It, can be with anode electrode, hole in ternary organic solar batteries in still another embodiment of the invention
Transport layer, photoactive layer, electron transfer layer and this sequence arrangement of cathode electrode or cathode electrode, electron transfer layer, light are living
Property layer, hole transmission layer and anode electrode this sequence arrangement, but sequence is not limited to this.
In still another embodiment of the invention, the method for manufacturing ternary organic solar batteries is provided, it is described
Method includes: preparation substrate；First electrode is formed in the region of substrate；Being formed on the top of first electrode includes light photoactive layer
Organic material layer；And organic material layer top formed second electrode, wherein light photoactive layer include electron acceptor and
Electron donor.
Ternary organic solar batteries of the invention can be manufactured by material known in the art and method, and substrate can be with
It is not that there is the transparent plastic substrate or substrate of glass of excellent transparency, surface smoothness, ease of handling and waterproofness, but not
It is limited to this, there is no limit as long as the substrate that substrate is typically used for organic solar batteries.Its particular instance include glass,
PET (polyethylene terephthalate), PEN (polyethylene naphthalate), PP (polypropylene), PI (polyimides), TAC
(tri acetyl cellulose) etc., but not limited to this.
Anode electrode can be made of the material with transparency and superior electrical conductivity, but not limited to this.Anode electrode
Particular instance includes metal, such as vanadium, chromium, copper, zinc and gold or its alloy；Metal oxide, such as zinc oxide, indium oxide, oxygen
Change indium tin (ITO) and indium zinc oxide (IZO)；The combination of metal and oxide, such as ZnO:Al or SnO2: Sb；And it is conductive poly-
Object, such as poly- (3 methyl thiophene), poly- [3,4- (ethylene -1,2- dioxy) thiophene] (PEDOT), polypyrrole and polyaniline etc. are closed,
But not limited to this.
The method for being used to form anode electrode is not particularly limited, but anode electrode can be by being applied in substrate
It is coated in membrane form on one surface or by using following methods to be formed: such as sputter, electron beam, heat deposition, rotation
Painting, silk-screen printing, ink jet printing, scraper or gravure printing method.
When anode electrode is formed on the substrate, the process of the cleaning of substrate experience, removing moisture and hydrophilic modifying can be made:
For example, existing on hot plate when graphical ITO substrate is successively washed with cleaning agent, acetone and isopropanol (IPA)
When dried at 100 DEG C to 150 DEG C to remove moisture, and washed completely, the surface of substrate is by hydrophilic modifying.Pass through above-mentioned surface
Modified, thin polymer film can be formed easily on the anode electrode, and the quality of film can also be improved.
The example of the preconditioning technique of anode electrode includes: surface oxidation method a) discharged using parallel-plate；B) by
Carry out the method for oxidized surface under vacuum state using ozone caused by ultraviolet light；C) free using the oxygen generated by plasma
The method that base carrys out oxidizing anode electrode；Etc..
One of the method can be selected according to the state of anode electrode or substrate.However, when using any method,
It preferably prevents the oxygen on the surface of anode electrode or substrate from leaving, and usually inhibits moisture and organic to the maximum extent
The reservation of material.In such a case, it is possible to maximize pretreated substantial effect.
In still another embodiment of the invention, the ozone generated by UV can be used come the method for oxidized surface.
In this case, after ultrasonic cleaning, graphical ITO substrate is toasted on hot plate and is thoroughly dried, and
Interior is introduced, then can be washed with ozone, the ozone is by starting UV lamp so that oxygen reacts to produce with ultraviolet light
It is raw.
However, the method being modified in the present invention to the surface of graphical ITO substrate does not need particularly to limit, and
And any method can also be used, as long as this method is the method for aoxidizing substrate.
Cathode electrode can be made of the metal with small work function, but not limited to this.Its particular instance includes metal,
Such as magnesium, calcium, sodium, potassium, titanium, indium, yttrium, lithium, gadolinium, aluminium, silver, tin and lead or its alloy；And material with multi-layer structure,
Such as Ca/Al, LiF/Al, LiO2/Al、LiF/Fe、Al/Li、Al/BaF2And Al/BaF2/Ba；Etc., but not limited to this.
Cathode electrode can be 2 × 10 in vacuum degree-4Pa or lower heat deposition device inside deposit and are formed, but its shape
At being not limited to this method.
The material of hole transmission layer and/or electron transfer layer for effectively by the electronics separated from light photoactive layer and
Hole transport is to electrode, and material is not particularly limited.
The material of hole transmission layer can be poly- (3,4- ethene dioxythiophene): polystyrolsulfon acid (PEDOT:PSS), molybdenum
Oxide (MoOx), vanadium oxide (V2O5)；Nickel oxide (NiO)；Tungsten oxide (WOx)；Etc., but not limited to this.
The material of electron transfer layer can be electrophilic metal oxide, and can be particularly 8-hydroxyquinoline
Metal complex；Include Alq3Complex compound；Metal complex comprising Liq；LiF；Titanium oxide (TiOx)；Zinc oxide
(ZnO), cesium carbonate (Cs2CO3), acetylacetone,2,4-pentanedione zirconium (ZrAcac)；Etc., but not limited to this.
Photoactive layer can be formed by the following method: by active material, such as electron donor and/or electron acceptor dissolution
In organic solvent (such as anhydrous chloroform), then for example, by the method for spin coating, dip-coating, silk-screen printing, spraying, scraper and brushing
Acquired solution is coated, but this method is without being limited thereto.
In still another embodiment of the invention, the ternary organic solar batteries are provided in photoelectric conversion field
In application.
Explanation is further explained to the present invention by the following examples, but is not construed as limiting the invention.It should be understood that
These examples are only for illustrating the present invention and are not intended to limit the scope of the present invention.In embodiment, major receptors ITC-2Cl and
The structural formula of accessory receptor IOIC-2Cl is as follows:
R2It is selected from-C6H13。
Embodiment 1
The synthesis of compound ITC-2Cl: under nitrogen protection, by compound 1 (200mg, 0.19mmol), end group 2
(187mg, 0.8mmol), pyridine (1ml) and anhydrous chloroform (30ml) are added in there-necked flask, and air-blowing removes oxygen 10 minutes.Then
75 DEG C are heated to be refluxed overnight.After TLC shows fully reacting, stops reaction, be cooled to room temperature.Directly revolving removes chloroform, adds
Enter methanol, collects the dark solid of generation.Then through petroleum ether: methylene chloride (1:2) column Chromatographic purification obtains blue solid product
0.243g, yield 85%.
Embodiment 2
The synthesis of compound IOIC-2Cl: under nitrogen protection, by compound 3 (89mg, 0.078mmol), end group 4
(178mg, 0.78mmol), pyridine (1ml) and anhydrous chloroform (30ml) are added in there-necked flask, and air-blowing removes oxygen 10 minutes.So
After be heated to 75 DEG C and be refluxed overnight.After TLC shows fully reacting, stops reaction, be cooled to room temperature.Directly revolving removes chloroform,
Methanol is added, collects the dark solid of generation.Then through petroleum ether: methylene chloride (1:1) column Chromatographic purification obtains dark green solid
Product 0.055g, yield 45%.
Embodiment 3
A kind of preparation of ternary organic solar batteries, comprising:
(1) substrate is cleaned.The dust and residue glue that the appropriate detergent wiping surface ITO removes adherency are dipped with cotton balls；With certainly
Water is cleaned by ultrasonic primary about 15min, is then cleaned by ultrasonic primary about 15min with deionized water, removes detergent and impurity；It connects
Be cleaned by ultrasonic primary about 15min with anhydrous propanone, remove the organic matter and grease not yet completely removed；It is finally super with isopropanol
Sound cleans primary about 15min, removes the organic matter of remaining, is put into 110 DEG C of drying box and is dried for standby.
(2) UVO (UV ozone) is pre-processed.The washed sheet glass with ITO is put into ozone-ultraviolet generator
20min is managed, its work function, conductivity, surface energy and flatness etc. are optimized.
(3) preparation of anode modification layer
Anode modification layer is PEDOT:PSS (H.C.Stark, Germany, Clevious P VP AI 4083): using platform
Formula sol evenning machine (KW-4A, the Microelectronics Center, Academia Sinica) rotates 30~60s with the rotation speed of 5000rpm and prepares thickness
The film of 40nm, then in thermal station 150 DEG C toast 15min in the air.Anode modification layer can make up the table of ito glass piece
Planar defect avoids local electric leakage is excessive from causing shorted devices, improves the work content of anode.Finally PEDOT is coated with by what is heated:
The substrate of PSS be transferred to anhydrous and oxygen-free High Purity Nitrogen protection glove box in be cooled to room temperature it is spare.
(4) preparation of photoactive layer.By polymeric donor PBDB-T-2Cl and two kinds of small molecule receptor ITC-2Cl and
IOIC-2Cl is dissolved in anhydrous chloroform by D/A1/A2 weight ratio 1:1:0, is placed in glove box and is stirred at room temperature 12 hours, obtains
To the blend solution to receptor, using sol evenning machine under the revolving speed of 2400rpm spin-coating film, photoactive layer is with a thickness of 100nm.
(5) preparation of cathodic modification layer
Cathodic modification layer is using the acetylacetone,2,4-pentanedione zirconium (ZrAcac) of dehydrated alcohol dissolution, and preparation method is according to 3mg/
The concentration of ml be formulated and put be stirred at room temperature 1 hour or more it is spare, photolytic activity is uniformly spin-coated on using 5000rpm revolving speed
Layer surface.
(6) vapor deposition of electrode
Using metal Al electrode, pressure in vacuum tank is less than 2 × 10 when vapor deposition-4Pa, thickness 100nm of aluminium or so (SQM-160
Film thickness dynamic monitor monitoring).
Embodiment 4
The process is carried out in the same manner as example 1, the difference is that only in the preparation process of photoactive layer, is gathered
It is 1:0.7 that object donor PBDB-T-2Cl and two kinds of small molecule receptors ITC-2Cl and IOIC-2Cl, which are closed, by the mass ratio of D/A1/A2:
0.3 mode is dissolved in anhydrous chloroform.
Embodiment 5
The process is carried out in the same manner as example 1, the difference is that only in the preparation process of photoactive layer, is gathered
It is 1:0.5 that object donor PBDB-T-2Cl and two kinds of small molecule receptors ITC-2Cl and IOIC-2Cl, which are closed, by the mass ratio of D/A1/A2:
0.5 mode is dissolved in anhydrous chloroform.
Embodiment 6
The process is carried out in the same manner as example 1, the difference is that only in the preparation process of photoactive layer, is gathered
It is 1:0:1's that object donor PBDB-T-2Cl and two kinds of small molecule receptors ITC-2Cl and IOIC-2Cl, which are closed, by the mass ratio of D/A1/A2
Mode is dissolved in anhydrous chloroform.
Solar cell device parameter of the table 1 based on chlorination light active material
It should be noted that above example is only used to illustrate the technical scheme of the present invention rather than is limited.Although ginseng
It is described the invention in detail according to given example, but those skilled in the art can be as needed to this hair
Bright technical solution is modified or replaced equivalently, without departing from the spirit and scope of the technical solution of the present invention.
Claims (10)
1. a kind of photoactive layer, including electron donor and electron acceptor, which is characterized in that the electron donor is PBDB-T-
2Cl, the receptor include major receptors ITC-2Cl and accessory receptor IOIC-2Cl, wherein
The major receptors ITC-2Cl structural formula is as follows:
The accessory receptor IOIC-2Cl structural formula is as follows:
Wherein, the R in ITC-2Cl and IOIC-2Cl2Independently selected from hydrogen atom, alkyl and alkoxy.
2. photoactive layer as described in claim 1, which is characterized in that R2Independently selected from hydrogen atom, C1~C20 alkyl and
The alkoxy of C1~C22；Preferably, R2Selected from-C6H13。
3. photoactive layer as described in claim 1, which is characterized in that the mass ratio of electron donor and electron acceptor is 1:0.5-
5 (preferably 1:1).
4. photoactive layer as described in claim 1, which is characterized in that in the electron acceptor, ITC-2Cl and IOIC-2Cl's
Mass ratio is 1~0:0~1 (preferably 0.7:0.3).
5. application of any one of the claim 1-4 photoactive layer in preparation ternary organic solar batteries.
6. a kind of ternary organic solar batteries characterized by comprising first electrode；It is set as opposite with first electrode
Second electrode；And it is set to the photoactive layer according to any one of claims 1-4 between first electrode and second electrode.
7. ternary organic solar batteries as claimed in claim 6, which is characterized in that the ternary organic solar batteries exist
It further include the one or more of hole transmission layer and hole injection layer between first electrode and photoactive layer.
8. ternary organic solar batteries as claimed in claim 6, which is characterized in that ternary organic solar batteries are second
It further include electron transfer layer or hole transmission layer between electrode and photoactive layer.
9. a kind of preparation method of ternary organic solar batteries, which is characterized in that the preparation method includes: preparation substrate；
First electrode is formed in the region of substrate；Being formed on the top of first electrode includes light according to any one of claims 1-4
The organic material layer of photoactive layer；And second electrode is formed on the top of organic material layer.
10. application of any one of the claim 6-8 ternary organic solar batteries in photoelectric conversion field.
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Application publication date: 20191126 |