CN102969449B - Solar cell comprising electron transfer layer - Google Patents
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- CN102969449B CN102969449B CN201210471924.0A CN201210471924A CN102969449B CN 102969449 B CN102969449 B CN 102969449B CN 201210471924 A CN201210471924 A CN 201210471924A CN 102969449 B CN102969449 B CN 102969449B
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Abstract
The invention discloses a solar cell comprising an electron transfer layer. The solar cell comprises a substrate, a positive pole, an active layer and a negative pole, which are laminated orderly, wherein the electron transfer layer is arranged between the active layer and the positive pole; a material of the electron transfer layer is a single polymer with a structural formula (I); the polymer n is any integer between 1 and 300; and A is selected from 4-nitryl-substituted substituted phenyl shown in the structural formula II, 4-alkoxy-substituted substituted phenyl shown in the structural formula III, and a heterocyclic ring shown in the structural formula IV or a heterocyclic ring shown in the structural formula V. The cell has high open-circuit voltage and good device performance.
Description
Technical field
The present invention relates to field of photoelectric devices, particularly relate to a kind of solar cell.
Background technology
Along with the increase year by year of global energy requirements, the disposable energy such as oil, coal day by day exhausted, people have dropped into more concern and research to the renewable resource such as wind energy, solar energy, are wherein one of focuses wherein based on the solar cell of photovoltaic effect.
At present, solar cell ripe on market is mainly the inorganic solar cell such as based single crystal silicon, polysilicon, amorphous silicon, GaAs, indium phosphide and polycrystalline film compound semiconductor, wherein, polysilicon and non-crystal silicon solar cell are occupied an leading position in civil solar Battery Market.Through the development in more than 50 years, the photoelectric conversion efficiency of inorganic monocrystalline silicon solar cell is by 6% at the beginning of invention, bring up to current peak efficiency and can reach more than 30%, but because inorganic semiconductor solar cell is very high to the requirement of material purity, and expensive, therefore its application is very limited.
1986, Kodak introduced first to body and acceptor material in same device, formed hetero-junction solar cell conversion efficiency and reached 1%, indicate that photovoltaic device prepared by organic semiconductor makes a breakthrough.Sariciftci in 1992 etc. are to MEH-PPV/C
60do not interact in ground state both finding in the research of compound system, but C
60but there is very strong quenching effect to the fluorescence of MEH-PPV, and propose in system, to there is Photo-induced electron transfer mistake.People further investigate different compound systems, demonstrate the existence of Photo-induced electron transfer.This process completes in several psec, and the electronics that can effectively stop optical excitation to produce and hole again compound occur.The discovery of Photoinduced Charge fast energy transfer phenomena is the important breakthrough of polymer solar cells theoretical side, for the raising of polymer solar cells efficiency provides theories integration.
The people such as nineteen ninety-five Yu Gang are by blended by electron donor material and acceptor material, and obtain the solar cell of conjugated polymer MEH-PPV and carbon 60 inierpeneirating network structure, its energy conversion efficiency reaches 2.9%.In this system, electron donor material and acceptor material form the interpenetrating networks shape structure of co-continuous, this structure increases the two interfacial area greatly, heterojunction is disperseed more, this structure heterojunction structure being distributed to whole active layer, in fact whole active layer is become a large body heterojunction, thus any position in active layer all can produce electric charge.As long as each phase material is formed from the two interface to the continuous passage of each self-electrode, so, can be greatly improved by the conversion efficiency of photon to electronics.The solar cell that Here it is it has often been said.
Bulk heterojunction concept produces the fault of construction overcoming individual layer, bilayer/multilayer device.Due to electron donor and the network-like continuous phase of each self-forming of electron acceptor, the electronics that photoinduction produces and hole respectively respective mutually in transport and be collected on corresponding electrode, photo-generated carrier is reduced by the probability of compound again greatly arriving before corresponding electrode, thus improves photoelectric current.Like this, bulk heterojunction structure just can significantly improve photovoltaic energy conversion efficiency.Nowadays, bulk heterojunction concept has been widely used in the solar cell based on polymer, and energy conversion efficiency can reach more than 5%, and it has tempting developing direction.
But the open circuit voltage of current organic photovoltaic cell generally can only reach about 0.60 ~ 0.80eV, distance commercialization also has one section of larger distance.Therefore, how obtaining high efficiency higher, the organic solar batteries that performance is more stable, realize it and commercially produce, be applied to all spectra that current inorganic solar cell is applied, is the very large challenge that those skilled in the art face.
Summary of the invention
The invention discloses a kind of solar cell comprising electron transfer layer, it has higher open circuit voltage simultaneously, thus has good device performance.
The solar cell comprising electron transfer layer of the present invention comprises the substrate, anode, active layer and the negative electrode that stack gradually, wherein, electron transfer layer is established between active layer and negative electrode, the material of described electron transfer layer is the polymer that a kind of monomer has structural formula (I), its polymer n is the arbitrary integer between 1 ~ 300
A is selected from substituted-phenyl that 4-nitro shown in formula II replaces, the 4-alkoxyl shown in formula II I replaces substituted-phenyl, the substituted heterocycle shown in structural formula IV or the substituted heterocycle shown in structural formula V;
Wherein R
1, R
2, R
3, R
4, R
5, R
6, R
7, R
8, R
10, R
11, R
12, R
13, R
14, R
15, R
16, R
17, R
18independently be selected from hydrogen, halogen, hydroxyl, amido, substituted amido, cyano group, alkyl, alkoxyl, nitro, amide groups, haloalkyl, acyl group, aldehyde radical, carboxyl, alkoxy carbonyl group or acyloxy, and R
5, R
6, R
7, R
8be asynchronously hydrogen;
R
9be selected from alkyl or the 1-3 carbon atom substituted alkyl of 1-3 carbon atom;
X, Y are independently selected from nitrogen, oxygen or sulphur;
Wherein said alkyl is 1-6 carbon atom alkyl; Described alkoxyl is alkyl oxy or the oxygen base alkyl of 1-6 carbon atom; Described haloalkyl is by the alkyl of 1-6 carbon atom of F, Cl or Br replacement; Alkoxy carbonyl group is the alkoxy carbonyl group of 1-6 carbon atom.
When described A is substituted-phenyl II, wherein R
1, R
2, R
3, R
4separately refer to hydrogen, halogen, hydroxyl, amido, methyl, ethyl.Described R
1, R
2, R
3and R
4in preferably have one at least for hydroxyl or amido, described hydroxyl or amido are replaced to its corresponding phosphate, carboxylate, sulphonic acid ester, acid amides, peptide class and corresponding organic salt or inorganic salts derivative further.
When described A is substituted-phenyl III, wherein R
5, R
6, R
7, R
8separately refer to hydrogen, halogen, hydroxyl, amido, methyl, ethyl, benzyl, alkoxyl, nitro, acyloxy or amide groups, and R
5, R
6, R
7, R
8be asynchronously hydrogen.Described R
5, R
6, R
7and R
8in preferably have one at least for hydroxyl or amido, described hydroxyl or amido are replaced to its corresponding phosphate, carboxylate, sulphonic acid ester, acid amides, peptide class and corresponding organic salt or inorganic salts derivative further.
When described A is substituted heterocycle IV or substituted heterocycle V, R
10, R
11, R
12, R
13, R
14, R
15, R
16, R
17, R
18independently be selected from hydrogen, halogen, hydroxyl, amido, substituted amido, cyano group, alkyl, alkoxyl.
Described compound of Formula I is selected from following compound:
3,4,5-trimethoxy-1-[(3-amino-4-nitrobenzophenone) sulfo-] benzene,
3,4,5-trimethoxy-1-[(3-acetamido-4-nitrobenzophenone) sulfo-] benzene,
3,4,5-trimethoxy-1-[(3-nitro-4-methoxyphenyl) sulfo-] benzene,
3,4,5-trimethoxy-1-[(3-amino-4-methoxyl phenyl) sulfo-] benzene,
3,4,5-trimethoxy-1-[(the fluoro-4-methoxyphenyl of 3-) sulfo-] benzene,
3,4,5-trimethoxy-1-[(4-ethoxyl phenenyl) sulfo-] benzene,
3,4,5-trimethoxy-1-[(3-benzyloxy-4-methoxyphenyl) sulfo-] benzene,
5-trifluoromethyl-2-[(3,4,5-trimethoxyphenyl) sulfo-] pyridine,
3-[(3,4,5-trimethoxyphenyl) sulfo-] benzothiophene-2-methyl formate,
2-fluorenes methoxy amide groups-3-acetoxyl group-N-[2-methoxyl group-5-(3,4,5-trimethoxyphenyl) sulfo-] propionamide,
2-amino-3-hydroxy-n-[2-methoxyl group-5-(3,4,5-trimethoxyphenyl) sulfo-] propionamide,
3,4,5-trimethoxy-1-[(3-hydroxyl-4-methoxyphenyl) sulfo-] benzene.
Preferably, the material of substrate is glass, flexible macromolecule or metal base.
Preferably, the material of anode is metal oxide or the metal oxide containing alloy.
Preferably, active layer comprises the electron donor material and electron acceptor material that are laminated, wherein electron donor material is conjugated polymer or Organic micromolecular semiconductor material, and electron acceptor material is carbon 60 and derivative thereof or carbon 70 and derivative thereof or inorganic semiconductor nano particle.
Preferably, the material of negative electrode is light tight metal.
Accompanying drawing explanation
Fig. 1 is the structural representation comprising the solar cell of electron transfer layer of the present invention.
Embodiment
Solar cell of the present invention comprises the substrate 1, anode 2, active layer 4 and the negative electrode 5 that stack gradually, has electron transfer layer 6, as shown in Figure 1 between active layer 4 and negative electrode 5.
Wherein, the material of electron transfer layer 6 is polymer that a kind of monomer has structural formula (I), and its polymer n is the arbitrary integer between 1 ~ 300,
A is selected from substituted-phenyl that 4-nitro shown in formula II replaces, the 4-alkoxyl shown in formula II I replaces substituted-phenyl, the substituted heterocycle shown in structural formula IV or the substituted heterocycle shown in structural formula V;
Wherein R
1, R
2, R
3, R
4, R
5, R
6, R
7, R
8, R
10, R
11, R
12, R
13, R
14, R
15, R
16, R
17, R
18independently be selected from hydrogen, halogen, hydroxyl, amido, substituted amido, cyano group, alkyl, alkoxyl, nitro, amide groups, haloalkyl, acyl group, aldehyde radical, carboxyl, alkoxy carbonyl group or acyloxy, and R
5, R
6, R
7, R
8be asynchronously hydrogen;
R
9be selected from alkyl or the 1-3 carbon atom substituted alkyl of 1-3 carbon atom;
X, Y are independently selected from nitrogen, oxygen or sulphur;
Wherein said alkyl is 1-6 carbon atom alkyl; Described alkoxyl is alkyl oxy or the oxygen base alkyl of 1-6 carbon atom; Described haloalkyl is by the alkyl of 1-6 carbon atom of F, Cl or Br replacement; Alkoxy carbonyl group is the alkoxy carbonyl group of 1-6 carbon atom.
When described A is substituted-phenyl II, wherein R
1, R
2, R
3, R
4separately refer to hydrogen, halogen, hydroxyl, amido, methyl, ethyl.Described R
1, R
2, R
3and R
4in preferably have one at least for hydroxyl or amido, described hydroxyl or amido are replaced to its corresponding phosphate, carboxylate, sulphonic acid ester, acid amides, peptide class and corresponding organic salt or inorganic salts derivative further.
When described A is substituted-phenyl III, wherein R
5, R
6, R
7, R
8separately refer to hydrogen, halogen, hydroxyl, amido, methyl, ethyl, benzyl, alkoxyl, nitro, acyloxy or amide groups, and R
5, R
6, R
7, R
8be asynchronously hydrogen.Described R
5, R
6, R
7and R
8in preferably have one at least for hydroxyl or amido, described hydroxyl or amido are replaced to its corresponding phosphate, carboxylate, sulphonic acid ester, acid amides, peptide class and corresponding organic salt or inorganic salts derivative further.
When described A is substituted heterocycle IV or substituted heterocycle V, R
10, R
11, R
12, R
13, R
14, R
15, R
16, R
17, R
18independently be selected from hydrogen, halogen, hydroxyl, amido, substituted amido, cyano group, alkyl, alkoxyl.
Described compound of Formula I is selected from following compound:
3,4,5-trimethoxy-1-[(3-amino-4-nitrobenzophenone) sulfo-] benzene,
3,4,5-trimethoxy-1-[(3-acetamido-4-nitrobenzophenone) sulfo-] benzene,
3,4,5-trimethoxy-1-[(3-nitro-4-methoxyphenyl) sulfo-] benzene,
3,4,5-trimethoxy-1-[(3-amino-4-methoxyl phenyl) sulfo-] benzene,
3,4,5-trimethoxy-1-[(the fluoro-4-methoxyphenyl of 3-) sulfo-] benzene,
3,4,5-trimethoxy-1-[(4-ethoxyl phenenyl) sulfo-] benzene,
3,4,5-trimethoxy-1-[(3-benzyloxy-4-methoxyphenyl) sulfo-] benzene,
5-trifluoromethyl-2-[(3,4,5-trimethoxyphenyl) sulfo-] pyridine,
3-[(3,4,5-trimethoxyphenyl) sulfo-] benzothiophene-2-methyl formate,
2-fluorenes methoxy amide groups-3-acetoxyl group-N-[2-methoxyl group-5-(3,4,5-trimethoxyphenyl) sulfo-] propionamide,
2-amino-3-hydroxy-n-[2-methoxyl group-5-(3,4,5-trimethoxyphenyl) sulfo-] propionamide,
3,4,5-trimethoxy-1-[(3-hydroxyl-4-methoxyphenyl) sulfo-] benzene.
The material of other layer of solar cell is respectively: the material of substrate 1 can be glass, plastics or metal base.Substrate 1 can be hard material, as glass or quartz, also can be flexible material, as flexible macromolecule, flexible high molecular material includes but not limited to: Polyethylene Naphthalate, polyethylene terephthalate, polyamide, polymethyl methacrylate, Merlon and/or polyurethane.Substrate 1, except above-mentioned insulating material, also can use electric conducting material, the metals such as such as titanium, aluminium, copper, nickel.
The material of anode 2 is metal oxide or the metal oxide containing alloy (doped), preferential oxidation indium tin (ITO), tin oxide, fluorine doped tin oxide etc.Anode can be formed by any traditional method, such as vapour deposition, sputter etc.
Active layer 4 comprises the electron donor material and electron acceptor material that are laminated, wherein electron donor material is conjugated polymer or Organic micromolecular semiconductor material, and electron acceptor material is carbon 60 and derivative thereof or carbon 70 and derivative thereof or inorganic semiconductor nano particle.
The material of negative electrode 5 is preferably light tight metal, such as Al, Ca/Al, Mg/Al, Mg/Ag, Cu, Au etc.The method manufacturing negative electrode 5 can be vapour deposition method deposition etc.
The manufacture method of solar cell of the present invention comprises each layer prepared electron transfer layer He stack gradually solar cell.
The method wherein preparing electron transfer layer comprises two kinds, as described below respectively.
One of manufacture method of electron transfer layer of the present invention comprises the steps:
The first, obtain compound 2 by compound 1 decarboxylative nitration, restore into compound 3, and then diazotising, with ehtyl potassium xanthate reacting generating compound 4;
The second, by aromatic amine 5 diazotising, then iodo product 6 fragrant with sodium iodide Reactive Synthesis;
Three, first compound 4 is reduced into benzenethiol 7, under being then dissolved in base catalyst effect with fragrant chlorinated compound 8 or fragrant iodo compound 6, obtains compound of Formula I;
Wherein, the structure of A is described above.
In order to prepare the CA4 derivative of the Sulfide-containing Hindered bridge chain in compound of Formula I, actual conditions is as follows:
The reaction temperature of the decarboxylative nitration in step one is 0-100 DEG C; Reduction reaction reducing agent used can be zinc powder, iron powder, magnesium powder, and acid can be acetic acid, hydrochloric acid, and reducing agent also can be palladium carbon/hydrazine hydrate, magnesium powder/hydrazine hydrate, iron powder/hydrazine hydrate, palladium carbon/hydrogen etc., and reaction temperature is 0-100 DEG C; In diazotation step, reagent can be natrium nitrosum, potassium nitrite, nitrobutane, and acid can be hydrochloric acid, sulfuric acid, phosphoric acid and acetic acid, and reaction temperature is-20-10 DEG C; Dithiocarbonic acids salinization reagent can be various alkyl xanthate, and reaction temperature is 0-120 DEG C;
Diazotation step in step 2 can use tetrahydrochysene lithium aluminium/oxolane reduction, and also can be hydrolyzed with sodium hydrate aqueous solution, reaction temperature is 0-100 DEG C; And the reaction dissolvent of iodide reaction can be ethanol, methyl alcohol, isopropyl alcohol, the alcohol such as ethylene glycol, benzene, toluene, acetone, oxolane, dioxane, DMF, pyridine, methyl-sulfoxide, carrene, chloroform, dichloroethanes etc.
In step 3, base catalyst used is for being selected from inorganic alkaline compound, and as potash, sodium carbonate, NaOH, potassium hydroxide, sodium hydride etc., reaction temperature is 0-200 DEG C.
The another kind of manufacture method of electron transport layer materials of the present invention comprises following steps:
(1), compound 1 decarboxylative nitration under red fuming nitric acid (RFNA) and acetic acid effect obtains compound 2, compound 3 is become again with zinc powder/acetic acid or palladium carbon/hydrazine hydrate reduction, then make diazonium salt solution with natrium nitrosum and hydrochloric acid, then with ehtyl potassium xanthate reacting generating compound 4;
(2), by aromatic amine 5 natrium nitrosum and hydrochloric acid diazonium salt solution is made, then iodo product 6 fragrant with sodium iodide Reactive Synthesis;
(3), by compound 4 be dissolved in oxolane, become benzenethiol 7 with tetrahydrochysene lithium aluminium reducing;
(4), by fragrant iodo compound 6 and benzenethiol 7 be dissolved in ethylene glycol and isopropyl alcohol or toluene equal solvent, under potash and cuprous iodide effect, composite structure is the material of general formula I;
Particularly, in each step, actual conditions is as follows:
Decarboxylative nitration step reaction temperature in step (1) is 0-100 DEG C, reduction reaction reducing agent used can be zinc powder, iron powder, magnesium powder, acid can be acetic acid, hydrochloric acid, reducing agent also can be palladium carbon/hydrazine hydrate, magnesium powder/hydrazine hydrate, iron powder/hydrazine hydrate, palladium carbon/hydrogen etc., reaction temperature is 0-100 DEG C, diazo reagent can be natrium nitrosum, potassium nitrite, nitrobutane, acid used can be hydrochloric acid, sulfuric acid, phosphoric acid and acetic acid, reaction temperature is-20-10 DEG C, dithiocarbonic acids salinization reagent can be various alkyl xanthate, reaction temperature is 0-120 DEG C,
Diazotising diazo reagent used in step (2) can be natrium nitrosum, potassium nitrite, nitrobutane, and acid used can be hydrochloric acid, sulfuric acid, phosphoric acid and acetic acid, and reaction temperature is-20-10 DEG C; Iodide reaction is so iodo reagent can be sodium iodide, KI, elemental iodine, lodine chloride, and reaction temperature is 0-100 DEG C;
Reduction step in step (3) can use tetrahydrochysene lithium aluminium/oxolane reduction, and also can be hydrolyzed with sodium hydrate aqueous solution, reaction temperature is 0-100 DEG C;
In step (4), the reaction dissolvent of iodide reaction can be the alcohol such as ethanol, methyl alcohol, isopropyl alcohol, ethylene glycol, benzene, toluene, acetone, oxolane, dioxane, N, dinethylformamide, pyridine, methyl-sulfoxide, carrene, chloroform, dichloroethanes or mixed solvent etc., base catalyst used is potash, sodium carbonate, NaOH, potassium hydroxide, sodium hydride, various potassium alcoholate or sodium alkoxide etc., and catalyst is cuprous iodide, cupric iodide, and reaction temperature is 0-200 DEG C.
The embodiment stacking gradually each layer of solar cell is as follows:
Some with lot number ITO Conducting Glass, specification is 15 millimeters × 15 millimeters, and the thickness of ITO is about 130 nanometers, and its square resistance is about 20 ohm.Use acetone, micron order semiconductor special purpose detergent, deionized water, the ultrasonic process of isopropyl alcohol 10 minutes clean ITO substrate surfaces successively, leave standstill 4 hours at putting into constant temperature oven 80 DEG C subsequently and dry.
ITO substrate after oven dry oxygen plasma treatment 4 minutes, organic attachment film of removing ITO surface attachment and organic pollution, proceed to anhydrous and oxygen-free by the substrate obtained by said method subsequently, be full of the special gloves case of high pure nitrogen (manufacture of VAC company of the U.S.).Under this glove box inert atmosphere, by polymer donor material and electron acceptor material, carbon 60 derivative-[6,6]-phenyl-C 61-methyl butyrate (PCBM) is placed in clean sample bottle respectively, with conventional organic solvent (as chlorobenzene, toluene etc.) dissolve be mixed with solution, be placed on heating mixing platform on stir, obtain clear filtrate with 0.45 micrometer polytetrafluoroethylene (PTFE) membrane filtration.Then according to a certain percentage by polymer donor material and electron acceptor material mixing, be placed on heating mixing platform and stir.
Electron transport layer materials of the present invention can provide ohmic contact to high-work-function metal; be placed in clean bottle; proceed in nitrogen protection film forming special gloves case; the solution being made into 0.01-1.5% is dissolved in the methyl alcohol being added with a small amount of acetic acid; be placed on mixing platform and stir, filter to obtain settled solution with 0.45 micron membrane filter.The preparation of active layer is obtained by the solution of coated polymer donor material on substrate and electron acceptor material mixing.For this reason, first just the negative-pressure adsorption that produced by mechanical pump of ITO substrate is on sol evenning machine, instillation polymer donor material and electron acceptor material mixing molten after, obtain through high speed spin coating (600-6000 rev/min), generally speaking, require that obtained active layer thickness is in 20-500 nanometer, preferred film thickness is 70-200 nanometer.Thickness controls by regulating the concentration of the rotating speed of sol evenning machine and control polymer donor material and electron acceptor material mixed solution.
Polymer donor material and electron acceptor material mixed solution are after ITO/PEDOT:PSS substrate film forming, after drying, instil above-mentioned electron transport layer materials more in the above, and through high speed spin coating (600-6000 rev/min), the thickness of the electron transfer layer of acquisition is in 0.5-50 nanometer.Subsequently, device is proceeded in Vacuum Deposition chamber, open mechanical pump and molecular pump, when reaching 3 × 10 in plating chamber
-4after the high vacuum of Pa, start AM aluminum metallization film (100 nanometer) as extraction electrode.By mask frame, each electrode and active layer are made the pattern designed.The region that the light-emitting zone of device is covered alternately by mask and ITO is defined as 0.15 square centimeter.
Except the preparation of electron transport layer materials, all preparation process of the present invention are all carried out in the glove box providing nitrogen inert atmosphere or in vacuum.In order to make above-mentioned vacuum thermal evaporation metallic film process, the growth rate of settling and total deposit thickness of film are controlled by the thermal power applied, and are monitored in real time by quartz crystal oscillator film thickness monitor (STM-100 type, Sycon company manufactures).The uv-visible absorption spectroscopy of active layer or polymer-electronics donor material is recorded by HP8453A type diode array formula ultraviolet-visible spectrophotometer, wave-length coverage 190 nanometer ~ 1100 nanometer of test.
The measuring process of the photoluminescence spectra of polymer-electronics donor material is as follows: according to the test result of its absorption spectrum, chooses suitable excitaton source.The light path above-mentioned film substrate being placed in Jobin Yvon Spex Fluorolog-3 double-grating fluorescence spectrophotometer can test photoluminescence spectra.In addition, also available discrete light sources excites, and spectra collection INSTASPEC IV type grating beam splitting CCD (charge coupled device) spectrometer has come.The excitation source that can for select has: He-Cd gas laser, exportable 325 nanometers, 442 nanometer exciting lines; The exportable 405 nanometer exciting lines of semiconductor diode laser; Argon ion laser, exportable 488 nanometers, 515 nanometer equal excitation spectral lines.
Solar cell is energy conversion device, solar energy is converted to electric energy, so the mensuration of any solar cell device parameter performance, will take all finally sunlight as testing standard.The radiant illumination of AM1.5G measurement standard conventional in laboratory is 100 milliwatts/square centimeter.When carrying out polymer solar cells performance test with solar simulation light, first with the irradiance of standard cell determination light source whether compound AM1.5G.Standard silicon solar cell is through calibration: under AM1.5G standard spectrum, i.e. when the illumination of 100 milliwatts/square centimeter radiant illumination is penetrated, the short circuit current obtained is 125 milliamperes.After determining irradiance, can test device.
Strengthening the effect in solar cell properties for showing device architecture and the method for the present invention relates to of the present invention, adopting conventional device as a comparison.
Embodiment 1
, as electron transfer layer, PFO-DBT35 is as electron donor material, and PCBM is electron acceptor material to adopt poly-[3,4,5-trimethoxy-1-[(3-amino-4-nitrobenzophenone) sulfo-] benzene].Compared with the conventional device not having electron transfer layer, open circuit voltage, by 0.50-0.60 volt, increases substantially 0.85-0.90 volt.
Embodiment 2
, as electron transfer layer, PFO-DBT15 is as electron donor material, and PCBM is electron acceptor material to adopt poly-[3,4,5-trimethoxy-1-[(3-acetamido-4-nitrobenzophenone) sulfo-] benzene].Compared with the conventional device not having electron transfer layer, its open circuit voltage, by 0.50-0.60 volt, increases substantially 0.80 volt.
Embodiment 3
, as electron transfer layer, PFO-DBT15 is as electron donor material, and PCBM is electron acceptor material to adopt poly-[3-[(3,4,5-trimethoxyphenyl) sulfo-] benzothiophene-2-methyl formate].Compared with the conventional device not having electron transfer layer, its open circuit voltage, by 0.55-0.65 volt, increases substantially 0.85-0.90 volt.
Embodiment 4
, as electron transfer layer, PFO-DBT15 is as electron donor material, and PCBM is electron acceptor material to adopt poly-[2-amino-3-hydroxy-n-[2-methoxyl group-5-(3,4,5-trimethoxyphenyl) sulfo-] propionamide].Compared with the conventional device not having electron transfer layer, its open circuit voltage, by 0.60-0.65 volt, significantly brings up to 0.90-0.95 volt.
Embodiment 5
, as electron transfer layer, PFO-DBT15 is as electron donor material, and PCBM is electron acceptor material to adopt poly-[2-fluorenes methoxy amide groups-3-acetoxyl group-N-[2-methoxyl group-5-(3,4,5-trimethoxyphenyl) sulfo-] propionamide].Compared with the conventional device not having electron transfer layer, its open circuit voltage, by 0.60-0.65 volt, significantly brings up to 0.85-0.95 volt.
Compared with prior art, tool of the present invention has the following advantages:
(1) device architecture that the present invention relates to, method significantly can improve the performance of solar cell device, especially this important indicator of open circuit voltage.
(2) device architecture that the present invention relates to adopts solution processing technology, and preparation technology is simple, and cost of manufacture is low.
(3) the material soluble solution of electron transfer layer of the present invention is in water or methyl alcohol polar solvent.And active layer material and electron acceptor material are generally insoluble to this kind solvent, therefore when forming this laminated device, between electron transfer layer and active layer, mixing phenomena can not be there is.
Certainly; the present invention also can have other various embodiments; when not deviating from the present invention's spirit and essence thereof; those of ordinary skill in the art are when making various corresponding change and distortion according to the present invention, but these change accordingly and are out of shape the protection range that all should belong to the claim appended by the present invention.
Claims (9)
1. comprise a solar cell for electron transfer layer, comprise the substrate, anode, active layer and the negative electrode that stack gradually, it is characterized in that,
Between active layer and negative electrode, be provided with electron transfer layer, the material of described electron transfer layer is the polymer that a kind of monomer has structural formula (I), and its polymer n is the arbitrary integer between 1 ~ 300,
A is selected from substituted-phenyl that 4-nitro shown in formula II replaces, the 4-alkoxyl shown in formula II I replaces substituted-phenyl, the substituted heterocycle shown in structural formula IV or the substituted heterocycle shown in structural formula V;
Wherein R
1, R
2, R
3, R
4, R
5, R
6, R
7, R
8, R
10, R
11, R
12, R
13, R
14, R
15, R
16, R
17, R
18independently be selected from hydrogen, halogen, hydroxyl, amido, substituted amido, cyano group, alkyl, alkoxyl, nitro, amide groups, haloalkyl, acyl group, aldehyde radical, carboxyl, alkoxy carbonyl group or acyloxy, and R
5, R
6, R
7, R
8be asynchronously hydrogen;
R
9be selected from alkyl or the 1-3 carbon atom substituted alkyl of 1-3 carbon atom;
X, Y are independently selected from nitrogen, oxygen or sulphur;
Wherein said alkyl is 1-6 carbon atom alkyl; Described alkoxyl is alkyl oxy or the oxygen base alkyl of 1-6 carbon atom; Described haloalkyl is by the alkyl of 1-6 carbon atom of F, Cl or Br replacement; Alkoxy carbonyl group is the alkoxy carbonyl group of 1-6 carbon atom.
2. solar cell as claimed in claim 1, is characterized in that, when described A is substituted-phenyl II, and wherein R
1, R
2, R
3, R
4separately refer to hydrogen, halogen, hydroxyl, amido, methyl, ethyl; Described R
1, R
2, R
3and R
4in have one at least for hydroxyl or amido, described hydroxyl or amido are replaced to its corresponding phosphate, carboxylate, sulphonic acid ester, acid amides, peptide class and corresponding organic salt or inorganic salts derivative further.
3. solar cell as claimed in claim 1, is characterized in that, when described A is substituted-phenyl III, and wherein R
5, R
6, R
7, R
8separately refer to hydrogen, halogen, hydroxyl, amido, methyl, ethyl, benzyl, alkoxyl, nitro, acyloxy or amide groups, and R
5, R
6, R
7, R
8be asynchronously hydrogen; Described R
5, R
6, R
7and R
8in have one at least for hydroxyl or amido, described hydroxyl or amido are replaced to its corresponding phosphate, carboxylate, sulphonic acid ester, acid amides, peptide class and corresponding organic salt or inorganic salts derivative further.
4. solar cell as claimed in claim 1, is characterized in that, when described A is substituted heterocycle IV or substituted heterocycle V, and R
10, R
11, R
12, R
13, R
14, R
15, R
16, R
17, R
18independently be selected from hydrogen, halogen, hydroxyl, amido, substituted amido, cyano group, alkyl, alkoxyl.
5. solar cell as claimed in claim 1, it is characterized in that, the material of described electron transfer layer is:
3,4,5-trimethoxy-1-[(3-amino-4-nitrobenzophenone) sulfo-] benzene,
3,4,5-trimethoxy-1-[(3-acetamido-4-nitrobenzophenone) sulfo-] benzene,
3,4,5-trimethoxy-1-[(3-nitro-4-methoxyphenyl) sulfo-] benzene,
3,4,5-trimethoxy-1-[(3-amino-4-methoxyl phenyl) sulfo-] benzene,
3,4,5-trimethoxy-1-[(the fluoro-4-methoxyphenyl of 3-) sulfo-] benzene,
3,4,5-trimethoxy-1-[(4-ethoxyl phenenyl) sulfo-] benzene,
3,4,5-trimethoxy-1-[(3-benzyloxy-4-methoxyphenyl) sulfo-] benzene,
5-trifluoromethyl-2-[(3,4,5-trimethoxyphenyl) sulfo-] pyridine,
3-[(3,4,5-trimethoxyphenyl) sulfo-] benzothiophene-2-methyl formate,
2-fluorenes methoxy amide groups-3-acetoxyl group-N-[2-methoxyl group-5-(3,4,5-trimethoxyphenyl) sulfo-] propionamide,
2-amino-3-hydroxy-n-[2-methoxyl group-5-(3,4,5-trimethoxyphenyl) sulfo-] propionamide, or
3,4,5-trimethoxy-1-[(3-hydroxyl-4-methoxyphenyl) sulfo-] benzene.
6. the solar cell according to any one of Claims 1 to 5, is characterized in that, the material of substrate is glass, flexible macromolecule or metal base.
7. the solar cell according to any one of Claims 1 to 5, is characterized in that, the material of anode is metal oxide or the metal oxide containing alloy.
8. the solar cell according to any one of Claims 1 to 5, it is characterized in that, active layer comprises the electron donor material and electron acceptor material that are laminated, wherein electron donor material is conjugated polymer or Organic micromolecular semiconductor material, and electron acceptor material is carbon 60 and derivative thereof or carbon 70 and derivative thereof or inorganic semiconductor nano particle.
9. the solar cell according to any one of Claims 1 to 5, is characterized in that, the material of negative electrode is light tight metal.
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| CN103811662A (en) * | 2013-11-06 | 2014-05-21 | 溧阳市江大技术转移中心有限公司 | Efficient organic photovoltaic cell provided with electronic transmission layer |
| CN103811661A (en) * | 2013-11-06 | 2014-05-21 | 溧阳市江大技术转移中心有限公司 | Organic photovoltaic cell with electron-transporting layer |
| CN106062981B (en) * | 2014-02-19 | 2019-08-16 | 默克专利股份有限公司 | Methoxyl group aryl surface modifier and organic electronic device comprising such methoxyl group aryl surface modifier |
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| EP0853113A1 (en) * | 1993-09-09 | 1998-07-15 | Takakazu Yamamoto | E1 Element using polythiophene |
| CN102334209A (en) * | 2009-01-12 | 2012-01-25 | 密歇根大学董事会 | Utilize electrons/to stop that exciton barrier-layer strengthens the organic photovoltaic battery open circuit voltage |
| CN102482402A (en) * | 2009-05-21 | 2012-05-30 | 破立纪元有限公司 | Conjugated polymers and their use in optoelectronic devices |
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| CN102334209A (en) * | 2009-01-12 | 2012-01-25 | 密歇根大学董事会 | Utilize electrons/to stop that exciton barrier-layer strengthens the organic photovoltaic battery open circuit voltage |
| CN102482402A (en) * | 2009-05-21 | 2012-05-30 | 破立纪元有限公司 | Conjugated polymers and their use in optoelectronic devices |
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