CN103700766A - Inverted polymer solar cell and manufacture method thereof - Google Patents

Inverted polymer solar cell and manufacture method thereof Download PDF

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Publication number
CN103700766A
CN103700766A CN201210367372.9A CN201210367372A CN103700766A CN 103700766 A CN103700766 A CN 103700766A CN 201210367372 A CN201210367372 A CN 201210367372A CN 103700766 A CN103700766 A CN 103700766A
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buffer layer
polymer solar
phthalocyanine
solar battery
improvement
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周明杰
王平
黄辉
张振华
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Oceans King Lighting Science and Technology Co Ltd
Shenzhen Oceans King Lighting Science and Technology Co Ltd
Shenzhen Oceans King Lighting Engineering Co Ltd
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Oceans King Lighting Science and Technology Co Ltd
Shenzhen Oceans King Lighting Engineering Co Ltd
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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
    • H10K30/10—Organic devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation comprising heterojunctions between organic semiconductors and inorganic semiconductors
    • 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
    • H10K85/30—Coordination compounds
    • H10K85/311—Phthalocyanine
    • 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

Abstract

The invention discloses an inverted polymer solar cell. The inverted polymer solar cell sequentially comprises a cathode, an electron buffer layer, an active layer, a hole buffer layer and an anode, wherein the hole buffer layer is made of phthalocyanine small molecules, such as copper phthalocyanine, vanadium phthalocyanine, or magnesium phthalocyanine. The invention also discloses a manufacture method of the inverted polymer solar cell. The manufacture method comprises the following step: (1) providing a cathode with a desired size; (2) evaporating the electron buffer layer, and spin-coating the active layer; (3) spin-coating the active layer with a solution containing phthalocyanine small molecules, and drying to form the hole buffer layer; (4) evaporating the anode to obtain the inverted polymer solar cell. The inverted polymer solar cell provided by the invention can reflect sunlight back to the active layer to realize sunlight reutilization based on the scattering and reflection effects of crystals formed by the phthalocyanine small molecules by adopting the inverted structure and using the phthalocyanine small molecules as the hole buffer layer, thereby improving the photoelectric conversion efficiency of the solar cell.

Description

A kind of inversion polymer solar battery and preparation method thereof
Technical field
The present invention relates to area of solar cell, relate in particular to a kind of polymer solar battery with inverted structure and preparation method thereof.
Background technology
Polymer solar battery is another new discovery of field of photovoltaic power generation after inorganic semiconductor solar cell.Compare with traditional inorganic silicon solar cell, polymer solar battery pliability is good, can curlingly fold, and manufacture craft is simple, and raw material is easy to get, and cost is low, in preparation process, also can not produce noxious substance, thereby has been subject in recent years paying close attention to widely.
The structure of existing polymer solar battery is generally: glass substrate/anode/Hole-injecting Buffer Layer for Improvement/active layer/electron buffer layer/negative electrode, when light is from bottom is injected, through glass substrate, anode and Hole-injecting Buffer Layer for Improvement, arrive after active layer, by the photoactive substance on active layer, absorbed, produce electron-hole pair, after electronics is separated with hole, electronics enters negative electrode by electron buffer layer, and hole enters anode by Hole-injecting Buffer Layer for Improvement, and anode and negative electrode are generation current after connecting.Polymer organic solar cell general structure is glass substrate/ITO/PEDOT:PSS/P3HT:PCBM/LiF/Al at present, because kayexalate (PSS) can produce corrosiveness to ITO surface, caused blemish to increase, the series resistance of battery increases, cause the conversion efficiency of solar cell low, thereby there is again in recent years the polymer solar battery of inverted structure, its structure is glass substrate/negative electrode/electron buffer layer/active layer/Hole-injecting Buffer Layer for Improvement/anode, therefore avoided the corrosion of kayexalate to ITO surface, guaranteed the conversion efficiency of solar cell.
Solar cell is an important factor that affects energy conversion efficiency on the utilization of sunlight, wherein active layer is the primary structure that absorbs sunlight in solar cell, yet because current inversion polymer solar battery is greatly mainly with poly-3-hexyl thiophene and [6,6]-phenyl-C61-methyl butyrate composite material (P3HT/PCBM) is as the material of active layer, it utilizes ability not high to sunlight, causes the energy conversion efficiency of current inversion polymer solar battery on the market relatively little.Therefore be necessary very much to improve the structure of solar cell, further improve the conversion efficiency of solar cell.
Summary of the invention
The object of the invention is to overcome the technological deficiency that existing inversion polymer solar battery is low to sunlight utilance, a kind of inversion polymer solar battery is provided, this is inverted polymer solar battery and adopts phthalocyanine micromolecular as the material of Hole-injecting Buffer Layer for Improvement, utilize the micromolecular scattering of phthalocyanines and reflex that the sunlight that sees through active layer is reflected back in active layer, be utilized once again, and then improve the conversion efficiency of solar cell.The present invention also provides the preparation method of this inversion polymer solar battery.
The present invention is achieved through the following technical solutions:
First aspect, the invention provides a kind of inversion polymer solar battery, comprise successively negative electrode, electron buffer layer, active layer, Hole-injecting Buffer Layer for Improvement and anode, the material of described Hole-injecting Buffer Layer for Improvement is phthalocyanine micromolecular, and described phthalocyanine micromolecular is CuPc, Phthalocyanine Zinc, phthalocyanine vanadium or magnesium phthalocyanine.
Preferably, described negative electrode is indium tin oxide glass (ITO), fluorine doped tin oxide glass (FTO), mixes the zinc oxide glass (AZO) of aluminium or mix the zinc oxide glass (IZO) of indium.
Preferably, described electron buffer layer is lithium fluoride (LiF), lithium carbonate (Li 2cO 3) or cesium carbonate (Cs 2cO 3).More preferably, described electron buffer layer is cesium carbonate (Cs 2cO 3).
Preferably, the thickness of described electron buffer layer is 0.5-10nm.More preferably, the thickness 2nm of described electron buffer layer.
Preferably, the material of described active layer is the composite material (P3HT/PCBM) of poly-3-hexyl thiophene and the formation of [6,6]-phenyl-C61-methyl butyrate.More preferably, in described active layer material, described poly-3-hexyl thiophene is 1:0.8-4 with the mass ratio of [6,6]-phenyl-C61-methyl butyrate.More preferably, in described active layer material, described poly-3-hexyl thiophene is 1:0.8 with the mass ratio of [6,6]-phenyl-C61-methyl butyrate.
Preferably, the thickness of described active layer is 80-300nm.More preferably, the thickness of described active layer is 200nm.
Preferably, the thickness of described Hole-injecting Buffer Layer for Improvement is 20-100nm.More preferably, the thickness of described Hole-injecting Buffer Layer for Improvement is 50-100nm.
Preferably, described anode is aluminium (Al), silver (Ag), gold (Au) or platinum (Pt).More preferably, described anode is aluminium (Al).
Preferably, the thickness of described anode is 80-200nm.More preferably, the thickness of described anode is 150nm.
Inversion polymer solar battery of the present invention, using phthalocyanine micromolecular as Hole-injecting Buffer Layer for Improvement, because the micromolecular HOMO energy level of phthalocyanines is in-5.4eV left and right, be applicable to injection and the transmission in hole, therefore improved the transmittability of Hole-injecting Buffer Layer for Improvement to hole; In addition, the little molecular proportion of phthalocyanines is easier to crystallization and forms crystal structure, and crystal structure has certain scattering process to light, when adopting inverted structure, process active layer after sunlight incident, a part is utilized by active layer, another part sees through active layer and arrives Hole-injecting Buffer Layer for Improvement, now, the crystal that phthalocyanine micromolecular forms will make light carry out scattering, has further concentrated light intensity, simultaneously can also be by scattering and reflection, make sunlight get back to active layer, by active layer, absorbed once again, thereby improved the photoelectric conversion efficiency of solar cell.
Second aspect, the invention provides a kind of preparation method who is inverted polymer solar battery, comprises the following steps:
(1) provide the negative electrode of required size, dry after cleaning;
(2) evaporation electron buffer layer on the negative electrode of treated mistake, then spin coating active layer dry;
(3) the little molecular solution of phthalocyanines that preparation mass fraction is 5-50%, is then spin-coated on described active layer, dries and forms Hole-injecting Buffer Layer for Improvement, and described phthalocyanine micromolecular is CuPc, Phthalocyanine Zinc, phthalocyanine vanadium or magnesium phthalocyanine;
(4) evaporation anode on described Hole-injecting Buffer Layer for Improvement, obtains being inverted polymer solar battery.
Preferably, the negative electrode that required size is provided that step (1) is described, concrete operations are: by carrying out photoetching treatment at the bottom of glass shirt, be then cut into needed size.
Preferably, described negative electrode is indium tin oxide glass (ITO), fluorine doped tin oxide glass (FTO), mixes the zinc oxide glass (AZO) of aluminium or mix the zinc oxide glass (IZO) of indium.
Preferably, after the described cleaning of step (1), be dried as using successively liquid detergent, deionized water, acetone, ethanol, isopropyl alcohol each ultrasonic 15 minutes, removes the organic pollution of glass surface, cleans up rear air-dry.
Preferably, the described evaporation of step (2) is vacuum evaporation, and evaporation temperature is 500-1000 ℃, and vacuum degree is 10 -3-10 -5pa.
Preferably, the described electron buffer layer of step (2) is lithium fluoride (LiF), lithium carbonate (Li 2cO 3) or cesium carbonate (Cs 2cO 3).More preferably, the described electron buffer layer of step (2) is cesium carbonate (Cs 2cO 3).
Preferably, the thickness of the described electron buffer layer of step (2) is 0.5-10nm.More preferably, the thickness 2nm of described electron buffer layer.
Preferably, the material of the described active layer of step (2) is the composite material of poly-3-hexyl thiophene and the formation of [6,6]-phenyl-C61-methyl butyrate.More preferably, in the material of the described active layer of step (2), the mass ratio of described poly-3-hexyl thiophene and described [6,6]-phenyl-C61-methyl butyrate is 1:0.8-4.More preferably, in described active layer material, described poly-3-hexyl thiophene is 1:0.8 with the mass ratio of [6,6]-phenyl-C61-methyl butyrate.
Preferably, the thickness of the described active layer of step (2) is 80-300nm.More preferably, the thickness of described active layer is 200nm.
Preferably, the described phthalocyanine micromolecular of step (3) is CuPc (CuPc), Phthalocyanine Zinc (ZnPc), phthalocyanine vanadium (V 2pc 5) or magnesium phthalocyanine (MgPc).
Preferably, the little molecular solution of the described phthalocyanines of step (3), solvent is chlorobenzene, toluene, chloroform or carrene.
Preferably, the little molecular solution of the described phthalocyanines of step (3), mass fraction is 30-50%.
Preferably, the oven dry that step (3) is described, in being full of the incubator of inert gas to dry 5-100 minute under 50-200 ℃ of condition.
Preferably, the thickness of the described Hole-injecting Buffer Layer for Improvement of step (3) is 20-100nm.More preferably, the thickness of the described Hole-injecting Buffer Layer for Improvement of step (3) is 50-100nm.
Preferably, the described anode of step (4) is aluminium (Al), silver (Ag), gold (Au) or platinum (Pt).More preferably, the described anode of step (4) is aluminium (Al).
Preferably, the thickness of the described anode of step (4) is 80-200nm.More preferably, the thickness of the described anode of step (4) is 150nm.
Preparation method of the present invention is usingd phthalocyanine micromolecular cheap and easy to get as Hole-injecting Buffer Layer for Improvement material, and preparation method's technique is simple, and cost of material is low, is applicable to large-scale industrial production.
Than prior art, the present invention has following beneficial effect:
(1) using phthalocyanine micromolecular as Hole-injecting Buffer Layer for Improvement, improved the transmittability of Hole-injecting Buffer Layer for Improvement to hole, utilize in addition phthalocyanine micromolecular easily to form the characteristic of crystal, further concentrated light intensity, utilize its scattering and reflex simultaneously, make sunlight get back to active layer and be utilized once again, thereby improved the photoelectric conversion efficiency that magnetic sun can battery;
(2) using phthalocyanine micromolecular cheap and easy to get as Hole-injecting Buffer Layer for Improvement material, preparation method's technique is simple, and cost of material is low, is applicable to large-scale industrial production.
Accompanying drawing explanation
In order to be illustrated more clearly in technical scheme of the present invention, to the accompanying drawing of required use in execution mode be briefly described below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skills, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the structural representation of the inversion polymer solar battery that makes of the embodiment of the present invention;
Fig. 2 is the inversion polymer solar battery of the embodiment of the present invention one preparation and current density and the voltage relationship figure of polymer solar battery prepared by comparative example.
Embodiment
Below in conjunction with the accompanying drawing in embodiment of the present invention, the technical scheme in embodiment of the present invention is clearly and completely described.
Embodiment mono-
A preparation method who is inverted polymer solar battery, comprises the following steps:
(1) select indium tin oxide glass (ITO) as negative electrode, the square electrode sheet of 20 * 20mm will be cut into after its photoetching treatment, use successively liquid detergent, deionized water, acetone, ethanol, isopropyl alcohol each ultrasonic 15 minutes, remove the organic pollution of glass surface, after cleaning up, put into 80 ℃ of baking ovens dry 1 hour;
(2) in vacuum degree, be 10 -5in the vacuum coating system of Pa, at above-mentioned indium tin oxide glass (ITO), go up evaporation electron buffer layer; Wherein electron buffer layer is cesium carbonate (Cs 2cO 3), thickness is 2nm; Evaporation temperature is 800 ℃; Then preparing total mass concentration is the P3HT of 18mg/mL and the chlorobenzene solution of PCBM (wherein the mass ratio of P3HT and PCBM is 1:0.8), in being full of the glove box of inert gas, be spin-coated in electron buffer layer, the condition with 200 ℃ in glove box of staying is annealed 5 minutes, the active layer that formation thickness is 200nm;
(3) chlorobenzene solution of the CuPc (CuPc) that preparation mass fraction is 40% is spin-coated on active layer in being full of the glove box of inert gas, and then in inert gas, the condition with 200 ℃ is annealed 5 minutes, forms the Hole-injecting Buffer Layer for Improvement of thickness 65nm;
(4) evaporation anode on described Hole-injecting Buffer Layer for Improvement, anode is aluminium (Al), thickness is 150nm; It is 10 that evaporation operates in vacuum degree -5in the vacuum coating system of Pa, with 800 ℃ of temperature conditions, carry out, obtain being inverted polymer solar battery.
Fig. 1 is the structural representation of the inversion polymer solar battery prepared of the present embodiment.As shown in Figure 1, a kind of inversion polymer solar battery, comprises ITO negative electrode 1, electron buffer layer 2, active layer 3, Hole-injecting Buffer Layer for Improvement 4 and anode 5, and wherein the material of Hole-injecting Buffer Layer for Improvement 4 is CuPc (CuPc), and thickness is 65nm.The structure of the inversion polymer solar battery that the present embodiment makes is:
ITO/Cs 2CO 3/（P3HT/PCBM）/CuPc/Al。
Embodiment bis-
A preparation method who is inverted polymer solar battery, comprises the following steps:
(1) the zinc oxide glass (IZO) that indium is mixed in selection is as negative electrode, the square electrode sheet of 30 * 30mm will be cut into after its photoetching treatment, use successively liquid detergent, deionized water, acetone, ethanol, isopropyl alcohol each ultrasonic 15 minutes, remove the organic pollution of glass surface, after cleaning up, be placed on shady and cool ventilation place nature airing;
(2) in vacuum degree, be 10 -4in the vacuum coating system of Pa, at the above-mentioned zinc oxide glass (IZO) of mixing indium, go up evaporation electron buffer layer; Wherein electron buffer layer is lithium fluoride (LiF), and thickness is 0.5nm; Evaporation temperature is 500 ℃; Then preparing total mass concentration is the P3HT of 30mg/mL and the chloroformic solution of PCBM (wherein the mass ratio of P3HT and PCBM is 1:4), by sol evenning machine, the toluene solution of above-mentioned P3HT and PCBM is spin-coated in described electron buffer layer, the rotating speed of controlling is 200r/min, the even glue time is 120 seconds, after spin coating by evaporation electron buffer layer and spin coating the negative electrode of toluene solution of above-mentioned P3HT and PCBM at room temperature place 48 hours, the active layer that to form thickness be 80nm;
(3) toluene solution of the Phthalocyanine Zinc (ZnPc) that preparation mass fraction is 5%, then by sol evenning machine, be spin-coated on described active layer, the rotating speed of controlling sol evenning machine is 1000r/min, the even glue time is 60 seconds, after spin coating by spin coating the negative electrode of Phthalocyanine Zinc put into the incubator that is full of inert gas, regulating temperature is 50 ℃, heat preservation and dryness 100 minutes, the Hole-injecting Buffer Layer for Improvement that formation thickness is 100nm;
(4) last evaporation anode on described Hole-injecting Buffer Layer for Improvement, anode is silver (Ag), thickness is 80nm; It is 10 that evaporation operates in vacuum degree -4in the vacuum coating system of Pa, with 500 ℃ of temperature conditions, carry out, obtain being inverted polymer solar battery.
The structure of the inversion polymer solar battery that the present embodiment makes is:
IZO/LiF/（P3HT/PCBM）/ZnPc/Ag。
Embodiment tri-
(1) select fluorine doped tin oxide glass (FTO) as negative electrode, the square electrode sheet of 20 * 20mm will be cut into after its photoetching treatment, use successively liquid detergent, deionized water, acetone, ethanol, isopropyl alcohol each ultrasonic 15 minutes, remove the organic pollution of glass surface, after cleaning up, be placed on shady and cool ventilation place nature airing;
(2) in vacuum degree, be 10 -3in the vacuum coating system of Pa successively in above-mentioned fluorine doped tin oxide evaporation electron buffer layer on glass; Wherein electron buffer layer is lithium carbonate (Li 2cO 3), thickness is 5nm, evaporation temperature is 1000 ℃; Then preparing total mass concentration is the P3HT of 16mg/mL and the xylene solution of PCBM (wherein the mass ratio of P3HT and PCBM is 1:3), in being full of the glove box of inert gas, be spin-coated in electron buffer layer, the condition with 50 ℃ in glove box of staying is annealed 100 minutes, the active layer that formation thickness is 200nm;
(3) dichloromethane solution of the magnesium phthalocyanine (MgPc) that preparation mass fraction is 50%, in being full of the glove box of inert gas, be spin-coated on active layer, then in inert gas, the condition with 150 ℃ is annealed 10 minutes, the Hole-injecting Buffer Layer for Improvement that formation thickness is 20nm;
(4) last evaporation anode on described Hole-injecting Buffer Layer for Improvement, anode is gold (Au), thickness is 180nm; It is 10 that evaporation operates in vacuum degree -3in the vacuum coating system of Pa, with 1000 ℃ of temperature conditions, carry out, obtain being inverted polymer solar battery.
The structure of the inversion polymer solar battery that the present embodiment makes is:
FTO?/Li 2CO 3/（P3HT/PCBM）/MgPc/Au。
Embodiment tetra-
(1) the zinc oxide glass (AZO) that aluminium is mixed in selection is as negative electrode, the square electrode sheet of 20 * 20mm will be cut into after its photoetching treatment, use successively liquid detergent, deionized water, acetone, ethanol, isopropyl alcohol each ultrasonic 15 minutes, remove the organic pollution of glass surface, after again rinsing with distilled water, be placed on shady and cool ventilation place nature airing;
(2) in vacuum degree, be 10 -5in the vacuum coating system of Pa in above-mentioned zinc oxide evaporation electron buffer layer on glass of mixing aluminium; Wherein electron buffer layer is cesium carbonate (Cs 2cO 3), thickness is 10nm; Evaporation temperature is 600 ℃; Then prepare the P3HT of 8mg/mL and the dichloromethane solution of PCBM (wherein the mass ratio of P3HT and PCBM is 1:2), in being full of the glove box of inert gas, be spin-coated in electron buffer layer, the condition with 70 ℃ in glove box of staying is annealed 100 minutes, the active layer that formation thickness is 300nm;
(3) the phthalocyanine vanadium (V that preparation mass fraction is 15% 2pc 5) chloroformic solution, in being full of the glove box of inert gas, be spin-coated on active layer, in inert gas with the condition annealing of 200 ℃ 5 minutes, the thickness 80nm of Hole-injecting Buffer Layer for Improvement.
(4) last evaporation anode on described Hole-injecting Buffer Layer for Improvement, anode is platinum (Pt), thickness is 250nm; It is 10 that evaporation operates in vacuum degree -5in the vacuum coating system of Pa, with 600 ℃ of temperature conditions, carry out, obtain being inverted polymer solar battery.
The structure of the inversion polymer solar battery that the present embodiment makes is:
AZO?/Cs 2CO 3/（P3HT/PCBM）/V 2Pc 5/Pt。
For the good characteristic of inversion polymer solar battery prepared by the embodiment of the present invention is described better, spy arranges following comparative example:
Prepare common polymer solar battery, the structure of described polymer solar battery is: ITO/(PEDOT/PSS)/(P3HT/PCBM)/Cs 2cO 3/ Al.Concrete preparation process is: by ito anode carry out photoetching treatment, be cut into the square electrode sheet of 20 * 20mm, use successively liquid detergent, deionized water, acetone, ethanol, isopropyl alcohol each ultrasonic 15 minutes, the organic pollution of removal glass surface, then spin coating Hole-injecting Buffer Layer for Improvement PEDOT/PSS, in spin coating, the mass ratio of active layer P3HT/PCBM(P3HT and PCBM is 1:0.8 again), and then evaporation cesium carbonate (Cs 2cO 3) electron buffer layer and negative electrode aluminium (Al), obtain polymer solar battery.Wherein, the thickness of Hole-injecting Buffer Layer for Improvement, active layer, electron buffer layer, negative electrode is respectively: 20nm, 150nm, 65nm, 150nm.
Adopt the current density and the voltage relationship figure that are inverted polymer solar battery common described in polymer solar battery and comparative example described in the current-voltage tester test embodiment of the present invention one, test result is shown in Fig. 2.Fig. 2 is current density and the voltage relationship figure that is inverted polymer solar battery common described in polymer solar battery and comparative example described in embodiment mono-.Current density and the voltage relationship figure of the inversion polymer solar battery that curve 1 makes for embodiment mono-; Current density and the voltage relationship figure of the polymer solar battery that curve 2 makes for comparative example.
Table 1 is the inversion polymer solar battery of embodiment 1 preparation that obtains according to Fig. 2 and polymer solar battery parameter list prepared by comparative example, wherein, current density refers to short-circuit current density, and voltage is greater than the current density absolute value that 0 current density is less than at 0 o'clock; Voltage refers in particular to open circuit voltage, and current density is less than the voltage that 0 voltage is greater than at 0 o'clock; Energy conversion efficiency η refers to the absolute value of short circuit current and open circuit voltage product; Fill factor, curve factor refers to the ratio of the product of battery maximum power and open circuit voltage and short circuit current, be that the circular arc area that curve and reference axis x, y surround accounts for the ratio of maximum rectangular area (numerical value is the product of maximum current density and maximum voltage), fill factor, curve factor is larger, show that solar cell output characteristic is more tending towards rectangle, the photoelectric conversion efficiency of solar cell is higher.
Table 1 embodiment mono-and comparative example's polymer solar battery parameter list
Figure BDA00002204520100091
From Fig. 2 and table 1, can find out, the current density of polymer solar battery is 6.18mA/cm described in comparative example 2, and the current density of being inverted polymer solar battery described in embodiment mono-has been brought up to 8.76mA/cm 2; Described in comparative example, the energy conversion efficiency of polymer solar battery is 1.40%, and the energy conversion efficiency of being inverted polymer solar battery described in embodiment mono-is 2.22%; The output characteristic (fill factor, curve factor) of being inverted polymer solar battery described in embodiment mono-is also more tending towards rectangle (greatly) than comparative example, pointed out employing inverted structure, and using phthalocyanine micromolecular as Hole-injecting Buffer Layer for Improvement, can improve the photoelectric conversion efficiency of solar cell.
The above is the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention; can also make some improvements and modifications, these improvements and modifications are also considered as protection scope of the present invention.

Claims (10)

1. be inverted polymer solar battery for one kind, comprise successively negative electrode, electron buffer layer, active layer, Hole-injecting Buffer Layer for Improvement and anode, it is characterized in that, the material of described Hole-injecting Buffer Layer for Improvement is phthalocyanine micromolecular, and described phthalocyanine micromolecular is CuPc, Phthalocyanine Zinc, phthalocyanine vanadium or magnesium phthalocyanine.
2. a kind of inversion polymer solar battery according to claim 1, is characterized in that, the thickness of described Hole-injecting Buffer Layer for Improvement is 20-100nm.
3. a kind of inversion polymer solar battery according to claim 1, is characterized in that, the thickness of described Hole-injecting Buffer Layer for Improvement is 50-100nm.
4. a preparation method who is inverted polymer solar battery, is characterized in that, comprises the following steps:
(1) provide the negative electrode of required size, dry after cleaning;
(2) evaporation electron buffer layer on the negative electrode of treated mistake, then spin coating active layer dry;
(3) the little molecular solution of phthalocyanines that preparation mass fraction is 5-50%, is then spin-coated on described active layer, dries and forms Hole-injecting Buffer Layer for Improvement, and described phthalocyanine micromolecular is CuPc, Phthalocyanine Zinc, phthalocyanine vanadium or magnesium phthalocyanine;
(4) evaporation anode on described Hole-injecting Buffer Layer for Improvement, obtains being inverted polymer solar battery.
5. a kind of preparation method who is inverted polymer solar battery according to claim 4, is characterized in that, described negative electrode is indium tin oxide glass, fluorine doped tin oxide glass, mix the zinc oxide glass of aluminium or mix the zinc oxide glass of indium.
6. a kind of preparation method who is inverted polymer solar battery according to claim 4, is characterized in that, the little molecular solution of the described phthalocyanines of step (3), and solvent is chlorobenzene, toluene, chloroform or carrene.
7. a kind of preparation method who is inverted polymer solar battery according to claim 4, is characterized in that, the mass fraction of the little molecular solution of the described phthalocyanines of step (3) is 30-50%.
8. a kind of preparation method who is inverted polymer solar battery according to claim 4, is characterized in that, the described oven dry of step (3) is to dry 5-100 minute under 50-200 ℃ of condition in being full of the incubator of inert gas.
9. a kind of preparation method who is inverted polymer solar battery according to claim 4, is characterized in that, the thickness of the described Hole-injecting Buffer Layer for Improvement of step (3) is 20-100nm.
10. a kind of preparation method who is inverted polymer solar battery according to claim 4, is characterized in that, the thickness of the described Hole-injecting Buffer Layer for Improvement of step (3) is 50-100nm.
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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
CN105280826A (en) * 2015-08-11 2016-01-27 苏州瑞晟纳米科技有限公司 Novel polymer solar cell with dual-electron transmission layer
CN111740019A (en) * 2020-06-05 2020-10-02 浙江大学 Halide perovskite photoelectric device based on polar interface

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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
CN104241530B (en) * 2014-09-30 2018-03-27 电子科技大学 A kind of organic thin film solar cell based on water solubility copolymer
CN105280826A (en) * 2015-08-11 2016-01-27 苏州瑞晟纳米科技有限公司 Novel polymer solar cell with dual-electron transmission layer
CN111740019A (en) * 2020-06-05 2020-10-02 浙江大学 Halide perovskite photoelectric device based on polar interface

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Application publication date: 20140402