CN102280589B - Organic solar cell and preparation method thereof - Google Patents
Organic solar cell and preparation method thereof Download PDFInfo
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Abstract
The invention discloses an anode modification technology for an organic micromolecule device having a heterogenous junction and belongs to the field of photoelectric conversion. The defect of low conversion efficiency in the prior art is overcome, an anode interface is modified through an anode insertion layer, anode exciton splitting is suppressed, and the carrier collection efficiency and energy conversion efficiency are improved. The main technical characteristics are that: an anode modification layer is arranged on a transparent electrode and is used for suppressing anode interface exciton splitting; and a heterogenous junction structure consisting of photosensitive layers of an electron donor and an electron acceptor is arranged on the modification layer. The anode interface exciton splitting is effectively suppressed on an anode-donor interface, and carriers can be effectively collected; therefore, the energy conversion efficiency of an organic solar cell is improved.
Description
Technical field
The invention discloses one and there is heterojunction organic molecule device anode modification technology, belong to opto-electronic conversion field.
Background technology
Solar cell is a kind of photovoltaic device that is electric energy by transform light energy.Reported since Bell Laboratory in 1954 inorganic solar cell that efficiency is 4%, since half a century, solar cell has obtained development at full speed, all starts in the world Lai Yichang " green energy resource revolution ".At present, silicon-based film solar cells large-scale industrial produce in the high conversion efficiency of amorphous silicon thin-film solar cell reached more than 10%.After the nineties in 20th century, in inorganic thin film solar cell family, attach again the photovoltaic device such as GaAs, cadmium telluride.The research of organic solar batteries starts from 1958, Kearns and Calvin are clipped in magnesium phthalocyanine dye (MgPc) between the electrode of two different work functions, make " sandwich " structure, thereby obtain the open circuit voltage of 200mV, but its short circuit current output is very low, so its energy conversion efficiency is also relatively low.This individual layer organic solar energy cell structure, substituted by C.W.Tang employing double layer heterojunction structure in 1986 (anode/to body/acceptor/resilient coating/negative electrode), 1% energy conversion efficiency obtained.The reason that energy conversion efficiency is increased dramatically, thinks and is provided due to the interface that an efficient exciton splits by double layer heterojunction structure, in other words, double layer heterojunction structure makes neutral electron-hole pair split into free carrier and becomes more easy.But organic solar batteries energy conversion efficiency is still lower at present, laboratory is the highest in 8% left and right, and small lot batch manufacture is generally 4% left and right, is the important problem that restricts at present its development.In recent years, organic solar batteries more and more receives the concern of industry.Be due to the less expensive of organic material own, wide material sources on the one hand, there is abundant diversity; In addition, the relative traditional silicon base battery of the course of processing is comparatively simple, and the cost of element manufacturing is relatively low.In organic solar batteries, absorb sunlight and first produce the electron hole pair with certain binding force, i.e. exciton.Exciton is externally electric neutrality, after must carrying out exciton fractionation, just can have photoelectric current, photovoltage output.Chinese patent CN201010200494.X " disclosing functional layer is the organic solar batteries of individual layer organic material " carries out modification to a kind of organic solar batteries that there is no heterojunction, and anode has one deck photosensitive layer.Its function is mainly that the exciton at antianode interface splits, and will suppress the unwanted charge injection of anodic interface on the one hand, depends on again this exciton and splits to obtain photoelectric current, and be difficult to control at actual mechanical process simultaneously.The operation principle of organic solar batteries (hereinafter to be referred as organic battery) is different from silica-based solar cell, and organic battery absorbs sunlight and first produces the electron hole pair with certain binding force, i.e. exciton.Exciton is externally electric neutrality, after must carrying out exciton fractionation, just can have the output of photoelectric current, photovoltage.
Summary of the invention
The object of the invention is to overcome above-mentioned shortcoming, adopt anode insert layer modified anode interface, split thereby suppress anode exciton, to improve carrier collection efficiency and energy conversion efficiency.Two of object, selects the semi-conducting material of broad stopband, low mobility as anode modification layer, to obtain heterojunction organic molecule solar cell.
For realizing task of the present invention, the technical solution proposing is: based on the heterojunction of organic molecule, formed by the transparent insulation substrate stacking gradually, transparency electrode, Electron donor acceptor, resilient coating, high reflectance electrode, it is characterized in that having one for suppressing the anode modification layer of anodic interface exciton fractionation above transparency electrode; Above this anode modification layer, forming heterojunction structure by the photosensitive layer of electron donor and electron acceptor, is the important area that produces photoelectric current.
The about 0.5-5nm of thickness of anode modification layer, is inserted between anode and electron donor layer, forms triangle potential barrier, improves the collection efficiency of charge carrier by tunneling effect.
The interface of Electron donor acceptor has two photosensitive layers at least, as above the anode modification layer of electron donor being that the first photosensitive layer and the second photosensitive layer on it form organic molecule heterojunction.The second photosensitive layer is to be deposited on above the first photosensitive layer of electron donor as electron acceptor.
Anode modification layer comprises silicon dioxide (SiO
2), lithium fluoride (LiF), titanium dioxide (TiO
2) in interior broad stopband, low carrier mobility thin-film material.Anode modification layer is to be deposited on the anode comprising by transparent oxide, metallic film or carbon nanotube conductive thin film.
The first photosensitive layer series electron donor material above anode modification layer, the hole mobile material including phthalocyanine dye, pentacene, porphyrin compound, cyanine dyes; Also comprise the electron acceptor material on the second photosensitive layer.Electron acceptor on the second photosensitive layer is derivative electron transport material or the inorganic nano material PEDOT:PSS including the very high macromolecule aqueous polymer of a kind of conductance also.
The present invention also provides a kind of organic solar batteries preparation method of the heterojunction based on organic molecule, cleans transparent insulation glass substrate; Sputter or vapour deposition conductive film; Laser grooving and scribing or corroding electrode figure sample are transparent anode;
It is characterized in that
The preparation method of transparency electrode Anodic decorative layer: comprise
Adopt the vacuum evaporation anode modification layer of growing in transparency electrode, also including the film thickness by temperature, control deposition the time;
Adopt the vacuum evaporation light-sensitive material of growing on anode modification layer, absorb light and produce the main region of photoelectric current as solar cell.
The vacuum evaporation photosensitive layer of growing on anode modification layer, at least twice plated film, obtains compound photosensitive layer, forms heterostructure.The anode modification layer of growing in transparency electrode, controls the about 0.5-5nm of film thickness of deposition.Adopt vacuum evaporation at least two photosensitive layers, as being the first photosensitive layer above the anode modification layer of electron donor, form organic molecule heterojunction with the second photosensitive layer on it.
Sunlight is from transparent insulation substrate and transparency electrode one side incident, and due to the very thin thickness of anode modification layer, generally in 0.5-5nm left and right, thereby its loss to sunlight is very little, negligible, so most of sunlight is still by photosensitive layer is absorbed.Photosensitive layer can produce a small amount of free carrier after absorbing photon energy, and situation is but more to produce the electron-hole pair with certain binding force, namely exciton.Neutral exciton diffusion is to donor-receiver interface, due to the difference of electron affinity and ionization energy, exciton can split into free carrier, the free carrier of two kinds of polarity anode and negative electrode directional drift and form final photoelectric current output respectively under the effect of internal electric field.But exciton is on the contrary in fractionation direction and the photoelectric current direction at anodic interface place.The photoelectric current direction of organic battery inside is that exciton splits direction at the electric charge at donor-receiver interface, and electronics is to cathode motion, the motion of hole anode.And exciton is that Fig. 2 is shown in the motion of electronics anode in the fractionation direction of anodic interface.So electrical property and electric current output that the exciton of anodic interface splits whole solar cell are negative factors.
The good effect producing in the invention process process is mainly manifested in: by adjusting the thickness of anode modification layer, make, in suppressing the fractionation of anodic interface exciton, can effectively collect charge carrier, thereby promote organic solar batteries energy conversion efficiency.
By insertion between anode and photosensitive layer, effectively suppressed anode-give body interface exciton split, its process operation is simple, easily control, effect is remarkable.
Brief description of the drawings
Fig. 1, be structural representation of the present invention.
Fig. 2, be in prior art heterojunction organic molecule solar cell interface exciton split schematic diagram.
Fig. 3, to be the present invention split schematic diagram with the heterojunction organic solar batteries interface exciton of anode modification layer.
Further illustrate the operation principle of the heterojunction solar battery (hereinafter to be referred as battery or organic battery) based on organic molecule provided by the invention below in conjunction with accompanying drawing:
See Fig. 1, with the heterojunction organic molecule solar cell of anode modification layer, formed by transparent insulation substrate 1, transparency electrode 2, anode modification layer 3, the first photosensitive layer 4, the second photosensitive layer 5, resilient coating 6, high reflectance electrode 7.Transparent insulation substrate 1 is transparency electrode 2 above, as the anode of solar cell; Transparency electrode 2 is anode modification layer 3 above, splits for the exciton that suppresses anodic interface; Anode modification layer 3 is the first photosensitive layer 4 above, as electron donor; The first photosensitive layer 4 is the second photosensitive layer 5 above, as electron acceptor, and forms Electron donor acceptor interface 1. with the first photosensitive layer 4, is the important area that produces photoelectric current; The second photosensitive layer 5 is resilient coating 6 above, as exciton barrier-layer; Resilient coating 6 high reflectance electrode 7 above, as the negative electrode of battery.Be different from silica-based solar cell, organic battery absorbs sunlight and first produces the electron hole pair with certain binding force, i.e. exciton.Exciton is externally electric neutrality, after must carrying out exciton fractionation, just can have the output of photoelectric current, photovoltage.
The direction of arrow in Fig. 2 represents respectively the direction of electronics and movement of hole, exciton split this process except can occur in Electron donor acceptor interface 1., also can occur in anode-to body interface 2..2. anode induces photoproduction exciton to split with the interface of giving body, in figure, arrow represents respectively the direction that the exciton of this interface splits, anode is that anode obtains electronics with the result of splitting to the exciton 2. of interface of body, and hole is stayed in donor material, 1. locating with heterojunction boundary is that Electron donor acceptor interface exciton fractionation direction is 1. on the contrary, contrary with the photoelectric current outbound course of whole solar cell, hinder effective collection of photo-generated carrier.So anode-split to the exciton 2. located of body interface is that we are unwilling to see, is also a key factor that causes organic solar batteries performance not high.
See Fig. 3, for improving carrier collection efficiency, select the semi-conducting material of broad stopband, low mobility for example, as anode modification layer, SiO
2, the material such as LiF, can think a kind of material of approximate insulator, exciton is cannot carry out at the interface of insulating material and electrode effectively splitting.In Fig. 3, the direction of arrow represents respectively the direction of electronics and movement of hole, the introducing of anode modification layer can suppress anode-to body interface 2. exciton split (in figure, do not had the represented electronics of arrow flow).1. exciton obtains efficient separating at heterojunction boundary, thereby photo-generated carrier is effectively collected by two electrodes.
But due to the poor electric conductivity of anode modification layer, if select improperly, the carrier collection to whole solar cell and carrier transport are infringements.So the thickness of anode modification layer is typically chosen in 0.5-5nm left and right, can not be too thick.Anode modification layer is inserted between anode and electron donor layer, forms triangle potential barrier, improves the collection efficiency of charge carrier by tunneling effect.Although, adopt tunneling effect to improve carrier collection efficiency and be used already in OLED industry, introduce the photovoltaic devices such as solar cell still first.The present invention is by adjusting the thickness of anode modification layer, and creationary test, makes in suppressing the fractionation of anodic interface exciton, effectively improves carrier collection efficiency simultaneously, thereby promotes organic solar batteries energy conversion efficiency.
1. providing efficient exciton to split interface with being subject to body interface to body, is the key area that double layer heterojunction organic solar batteries carries out exciton fractionation generation photoelectric current.The direction that its exciton splits be electronics by injecting to acceptor to body, collected by negative electrode, hole, to injecting to body, is collected by anode; Forming the photoelectric current direction by negative electrode anode at inside battery, is the power producer of whole organic solar batteries.1. electron donor and electron acceptor interface are not limited to bilayer, can be three layers or more multi-layered heterojunction organic solar batteries.The exciton that anode modification layer can suppress between anode-photosensitive layer splits, simultaneously by regulating anode modification layer thickness and tunneling effect, improve anode holoe carrier collection efficiency, and finally reach the object that promotes heterojunction organic molecule solar cell energy conversion efficiency.
Transparent insulation substrate 1 described in the present invention is the transparent insulation plastic layers such as the transparent glass layers such as quartz glass, silicate glass, vagcor, soda-lime glass or polyvinyl chloride (PVC), Merlon (PC), polyester (PET).
Transparency electrode 2 is metal film electrode or the carbon nanotube conductive thin films etc. such as the oxide transparent electrodes such as tin indium oxide (ITO), fluorine doped tin oxide (FTO), zinc oxide aluminum (AZO), zinc-gallium oxide (GZO), indium zinc oxide (IZO), zinc oxide boron (BZO) or gold (Au) film, aluminium (Al) film, silver (Ag) film.It can be used as the anode of battery.
Anode modification layer 3 can adopt silicon dioxide (SiO
2), lithium fluoride (LiF), titanium dioxide (TiO
2) etc. broad stopband, low carrier mobility material.It act as and suppresses the fractionation of anodic interface exciton, improves anodic interface carrier collection efficiency by tunneling effect simultaneously.
The heterostructure being made up of the first photosensitive layer 4 and the second photosensitive layer 5 is the main region that whole solar cell absorbs sunlight generation photoelectric current, photovoltage, is the heterojunction structure that organic molecule electron donor material and electron acceptor material form.The first photosensitive layer 4 is electron donor material, as giving body layer, can select the hole mobile materials such as phthalocyanine dye, pentacene, porphyrin compound, cyanine dyes; The second photosensitive layer 5 is electron acceptor material layer, is electron transport material or other inorganic nano materials such as PTCDA, C60, C70, Pe and derivative thereof, for example CdSe, CdS, CdTe, TiO2, ZnO, PbS, SnO2 etc., and carbon nano-tube, the functional materials such as Graphene.
Resilient coating 6 is cathode buffer layer, stops and can stop on the other hand the diffusion of cathode particles to photosensitive layer by exciton on the one hand.Resilient coating 6 can be selected the organic small molecule material such as conducting polymer film or BCP, Alq3 such as PEDOT:PSS.PEDOT:PSS is a kind of aqueous solution of high molecular polymer, and conductance is very high, according to different formulas, can obtain the aqueous solution that conductance is different.Be made up of PEDOT and two kinds of materials of PSS, PEDOT is EDOT(3,4-ethylenedioxy thiophene monomer) polymer, PSS is poly styrene sulfonate.These two kinds of materials have improved the dissolubility of PEDOT together greatly, and aqueous conductive thing is mainly used in Organic Light Emitting Diode OLED, organic solar batteries, OTFT, the electron transfer layer of ultracapacitor etc.
High reflectance electrode 7 is metal film electrode (as Ag, Al, Ca-Al, Mg-Ag etc.) or the high reflectance electrode based on metal oxide (ITO, ZnO), can be used as the negative electrode of battery.
Preparation method and the step of the heterojunction organic molecule solar cell with anode modification provided by the invention are as follows:
Transparent insulation substrate 1 in using quartz glass, silicate glass, vagcor or other transparent insulation materials as Fig. 1, as the substrate of film growth, after ultrasonic cleaning, adopt the method for sputter or vapour deposition in one side, plating layer of metal oxide electroconductive film;
The demand of preparing according to heterojunction organic molecule solar cell device, delineates metal conductive oxide membrane laser or corrode into needed stripe electrode pattern, and as the transparency electrode 2 in Fig. 1, it need to can be used as anode according to device;
The transparent conducting glass obtaining, through after ultrasonic cleaning, is sent in vacuum evaporation chamber by glove box, pretreatment chamber;
Adopt the mode of vacuum evaporation, control deposit film thickness, the anode modification layer 3 of growing by controlling depositing temperature and sedimentation time in transparency electrode 2;
Then adopt the mode of the vacuum evaporation light-sensitive material of growing on anode modification layer 3, obtain the first photosensitive layer 4 and the second photosensitive layer 5, form heterostructure, absorb light and produce the main region of photoelectric current as solar cell;
On the second photosensitive layer 5, adopt the mode of vacuum evaporation, prepare resilient coating 6, and being aided with corresponding electrode mask plate, metallic film stripe electrode, i.e. high reflectance electrode 7 in Fig. 1 are prepared in growth, according to device needs, as the negative electrode of individual layer organic molecule solar cell.
Embodiment
Embodiment 1:
Fig. 1 is the structure chart of the embodiment of the present invention 1, transparent insulation substrate 1 adopting quartz glass; Transparency electrode 2 adopts FTO stripe electrode, and its square resistance is 20 ohm/; Anode modification layer 3 adopts SiO2 earth silicon material; The first photosensitive layer 4 adopts CuPc phthalocyanine copper film; The second photosensitive layer 5 adopts C60 film; Resilient coating 6 adopts organic material Alq3 film; High reflectance electrode 7 adopts Al aluminium membrane electrode.
Be prepared as follows:
Select the polishing quartz glass of 1.1mm thickness as transparent insulation substrate 1, adopt hyperacoustic method to clean 2-3 hour quartz glass;
Adopt the method for sputter at the long one deck ITO of quartz glass one adnation conductive film, as transparency electrode 2, ito thin film thickness is 100nm;
ITO conductive photolithographic film is corroded into the anode of needed stripe electrode pattern as solar cell;
Whole ito glass substrate passes through the scouring of absolute methanol, acetone, and cleans 1 hour in deionized water for ultrasonic, afterwards ito glass substrate is toasted 10 minutes in the high temperature furnace of 130 degrees Celsius;
Sample is taken out from high temperature furnace, by PVD sputter mode, hide SiO2 target, the sputter of small size low rate, at ito anode superficial growth one deck SiO2 film, as anode modification layer 3, thickness is 4nm;
On SiO2 film, adopt vacuum evaporation, growth CuPc phthalocyanine copper film is as the first photosensitive layer 4, and its thickness is 20nm, and growth rate is 0.01nm/s;
On CuPc film, adopt vacuum evaporation growth C60 film as the second photosensitive layer 5, its thickness is 60nm, growth rate is 0.03nm/s;
On C60 film, adopt vacuum evaporation growth Alq3 film as resilient coating 6, its thickness is 6nm, growth rate is 0.01nm/s;
On Alq3 film, be aided with striped mask vacuum evaporation 100nm thickness A l aluminium stripe electrode as high reflectance electrode 1, the negative electrode of solar cell, growth rate is 0.11nm/s.So far, prepared the heterojunction in the present invention with anode modification layer, micromolecular, organic solar batteries.
Embodiment 2:
See Fig. 1, transparent insulation substrate 1 adopting quartz glass; Transparency electrode 2 adopts ITO stripe electrode, and its square resistance is 15 ohm/; Anode modification layer 3 adopts LiF lithium fluoride material; The first photosensitive layer 4 adopts CuPc phthalocyanine copper film; The second photosensitive layer 5 adopts C60 film; Resilient coating 6 adopts organic material Alq3 film; High reflectance electrode 7 adopts Al aluminium membrane electrode.
Be prepared as follows:
Select the polishing quartz glass of 1.5mm thickness as transparent insulation substrate 1, adopt hyperacoustic method to clean 3 hours quartz glass;
Adopt the method for sputter at the long one deck ITO of quartz glass one adnation conductive film, as transparency electrode 2.Ito thin film thickness is 120nm;
ITO conductive photolithographic film is lost into the anode 2 of needed stripe electrode pattern as solar cell;
Whole ito glass substrate passes through the scouring of absolute methanol, acetone, and cleans 1.5 hours in deionized water for ultrasonic, afterwards ito glass substrate is toasted 15 minutes in the high temperature furnace of 150 degrees Celsius;
Sample is taken out from high temperature furnace, send in the growth chamber of vacuum evaporation system, its vacuum degree is 10
-8-10
-7torr, adopts the mode of vacuum evaporation to grow LiF lithium fluoride film as anode modification layer 3, and its thickness is 1nm, and growth rate is 0.02nm/s;
On LiF lithium fluoride film, adopt the mode of vacuum evaporation to grow CuPc phthalocyanine copper film as the first photosensitive layer 4, its thickness is 50nm, and growth rate is 0.05nm/s;
On CuPc film, adopt the mode of vacuum evaporation to grow C60 film as the second photosensitive layer 5, its thickness is 100nm, growth rate is 0.06nm/s;
On C60 film, adopt the mode of vacuum evaporation to grow Alq3 film as resilient coating 6, its thickness is 10nm, growth rate is 0.03nm/s;
On Alq3 film, be aided with striped mask vacuum evaporation 120nm thickness A l aluminium stripe electrode 7 negative electrodes as high reflectance electrode 1 and solar cell, growth rate is 0.15nm/s.So far, prepared the heterojunction organic molecule solar cell with anode modification in the present invention.
Embodiment 3:
As Fig. 1, transparent insulation substrate 1 adopting quartz glass; Transparency electrode 2 adopts ITO stripe electrode, and its square resistance is 17 ohm/; Anode modification layer 3 adopts TiOx material; The first photosensitive layer 4 adopts pentacene thin film; The second photosensitive layer 5 adopts C60 film; Resilient coating 6 adopts organic material BCP film; High reflectance electrode 7 adopts Ag silver membrane electrode.
Be prepared as follows:
Select the polishing quartz glass of 3.2mm thickness as transparent insulation substrate 1, adopt hyperacoustic method to clean 4 hours quartz glass;
Adopt the method for sputter at the long one deck ITO of quartz glass one adnation conductive film, as transparency electrode 2.Ito thin film thickness is 150nm;
ITO conductive photolithographic film is lost into the anode of needed stripe electrode pattern as solar cell;
Whole ito glass substrate passes through the scouring of absolute methanol, acetone, and cleans 2 hours in deionized water for ultrasonic, afterwards ito glass substrate is toasted 10 minutes in the high temperature furnace of 170 degrees Celsius;
Adopt 10 milliliters of titanium tetraisopropylates (Ti[OCH (CH3) 2] 4,99.999%), 50 milliliters of 2-methyl cellosolve (CH3OCH2CH2OH, 99.9%), 5 milliliters of monoethanolamines (H2NCH2CH2OH, 99%), as raw material, are mixed with into the precursor solution of TiOx, and be heated to 80 degree, stir 2 hours; Again be heated to 120 degree, stir 1 hour;
ITO sample is taken out from high temperature furnace, adopt the TiOx precursor solution for preparing, by the mode of spin coating, ITO sample is placed in and on sol evenning machine, carries out spin coating and prepare TiOx film.Spin coating rotating speed is 6000RPM.The sample obtaining is spent high-temperature heating 20 minutes Celsius 110, obtains TiOx film by hydrolytic process, and thickness is 3nm, as anode modification layer 3;
Sample is sent in the growth chamber of vacuum evaporation system, its vacuum degree is 10
-8-10
-7torr adopts the mode of vacuum evaporation to grow pentacene thin film as the first photosensitive layer 4 on TiOx film, and its thickness is 60nm, and growth rate is 0.05nm/s;
On pentacene thin film, adopt the mode of vacuum evaporation to grow C60 film as the second photosensitive layer 5, its thickness is 120nm, growth rate is 0.06nm/s;
On C60 film, adopt the mode of vacuum evaporation to grow BCP film as resilient coating 6, its thickness is 12nm, growth rate is 0.02nm/s;
On BCP film, be aided with the negative electrode of striped mask vacuum evaporation 150nm thickness A l aluminium stripe electrode as high reflectance electrode 1 and solar cell, growth rate is 0.15nm/s.Preparation completes.
Key technology in the present invention is to adopt anode modification layer antianode-organic photosensitive bed boundary to modify, suppress the fractionation of exciton in anodic interface, control the thickness of anode modification layer simultaneously, improve anode carrier collection efficiency by tunneling effect, thereby can finally improve the energy conversion efficiency of heterojunction organic molecule solar cell.
Claims (4)
1. an organic solar batteries preparation method for the heterojunction based on organic molecule, cleans transparent insulation glass substrate; Sputter or vapour deposition conductive film; Laser grooving and scribing or corroding electrode figure sample are transparent anode; It is characterized in that the preparation method of transparency electrode Anodic decorative layer: comprise and adopt the vacuum evaporation anode modification layer of growing in transparency electrode, also including the film thickness by temperature, control time deposition, with the silicon dioxide (SiO of broad stopband, low carrier mobility
2) or titanium dioxide (TiO
2) thin-film material makes anode modification layer; Wherein titanium deoxid film, by prefabricated TiOx precursor solution, adopts spin coating method preparation; Silica membrane is prepared on transparency electrode surface by physical vaporous deposition (PVD); Silicon dioxide (SiO
2) or titanium dioxide (TiO
2) be 0.5-5nm as the thickness of anode modification layer, be inserted between anode and electron donor layer, form triangle potential barrier, improve the collection efficiency of charge carrier by tunneling effect; Adopt the vacuum evaporation light-sensitive material of growing on anode modification layer to form at least two photosensitive layers, absorb light as solar cell and produce the main region of photoelectric current.
2. the organic solar batteries preparation method of a kind of heterojunction based on organic molecule according to claim 1, it is characterized in that adopting the vacuum evaporation photosensitive layer of growing on anode modification layer, at least twice plated film, obtain compound photosensitive layer, form heterostructure, adopt vacuum evaporation grown buffer layer on the second photosensitive layer, growth rate is 0.02nm/s.
3. the organic solar batteries preparation method of a kind of heterojunction based on organic molecule according to claim 1, it is characterized in that adopting spin coating method to prepare anode modification layer in transparency electrode, spin coating rotating speed is 6000RPM, 110 degrees Celsius of heating 20 minutes, obtain by hydrolytic process the titanium deoxid film that thickness is 3nm.
4. the organic solar batteries preparation method of a kind of heterojunction based on organic molecule according to claim 1, it is characterized in that adopting at least two photosensitive layers of vacuum evaporation, on silica membrane, adopt vacuum evaporation, growth CuPc (CuPc) film is as the first photosensitive layer, and growth rate is 0.01nm/s; On CuPc (CuPc) film, adopt vacuum evaporation growth C60 film as the second photosensitive layer, growth rate is 0.03nm/s;
The first photosensitive layer and the second photosensitive layer as electron donor form organic molecule heterojunction.
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| CN105336861B (en) * | 2014-06-27 | 2017-11-17 | 华为技术有限公司 | A kind of organic solar batteries and preparation method thereof |
| CN105529345A (en) * | 2016-01-29 | 2016-04-27 | 中国计量学院 | Organic near-infrared light upconverter taking dual-heterojunction as photosensitive layer |
| CN108075003B (en) * | 2016-11-11 | 2020-02-18 | 国家纳米科学中心 | Spinning photovoltaic device and manufacturing method thereof |
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| CN111171625B (en) * | 2020-01-06 | 2021-07-30 | 上海大学 | Rapid preparation method of ink, preparation method of thin film and preparation method of oxide thin film transistor |
| CN114496333A (en) * | 2022-01-21 | 2022-05-13 | 吉林大学 | Based on63Heterojunction high-efficiency nuclear battery with NiO carrier transmission layer and preparation method |
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