CN103094481B - Cascade polymer solar cell and preparing method thereof - Google Patents
Cascade polymer solar cell and preparing method thereof Download PDFInfo
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- CN103094481B CN103094481B CN201310045851.3A CN201310045851A CN103094481B CN 103094481 B CN103094481 B CN 103094481B CN 201310045851 A CN201310045851 A CN 201310045851A CN 103094481 B CN103094481 B CN 103094481B
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- 229920000642 polymer Polymers 0.000 title claims abstract description 35
- 238000000034 method Methods 0.000 title claims abstract description 21
- 238000000231 atomic layer deposition Methods 0.000 claims abstract description 23
- 239000000758 substrate Substances 0.000 claims abstract description 22
- 239000010408 film Substances 0.000 claims description 27
- 238000000151 deposition Methods 0.000 claims description 10
- PNEYBMLMFCGWSK-UHFFFAOYSA-N Alumina Chemical compound [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 9
- 239000010409 thin film Substances 0.000 claims description 9
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical group O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 claims description 8
- 238000004062 sedimentation Methods 0.000 claims description 6
- 241000588731 Hafnia Species 0.000 claims description 2
- CJNBYAVZURUTKZ-UHFFFAOYSA-N hafnium(IV) oxide Inorganic materials O=[Hf]=O CJNBYAVZURUTKZ-UHFFFAOYSA-N 0.000 claims description 2
- 230000015572 biosynthetic process Effects 0.000 claims 1
- 230000003287 optical effect Effects 0.000 abstract description 6
- 238000010521 absorption reaction Methods 0.000 abstract description 4
- 238000005516 engineering process Methods 0.000 abstract description 4
- 238000001228 spectrum Methods 0.000 abstract description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 abstract description 3
- 229910052760 oxygen Inorganic materials 0.000 abstract description 3
- 239000001301 oxygen Substances 0.000 abstract description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 2
- 238000004806 packaging method and process Methods 0.000 abstract 3
- 239000010410 layer Substances 0.000 description 43
- 238000004528 spin coating Methods 0.000 description 17
- 238000000862 absorption spectrum Methods 0.000 description 11
- 239000000463 material Substances 0.000 description 10
- 238000006243 chemical reaction Methods 0.000 description 9
- MVPPADPHJFYWMZ-UHFFFAOYSA-N chlorobenzene Chemical compound ClC1=CC=CC=C1 MVPPADPHJFYWMZ-UHFFFAOYSA-N 0.000 description 8
- 239000011248 coating agent Substances 0.000 description 8
- 238000000576 coating method Methods 0.000 description 8
- 230000005693 optoelectronics Effects 0.000 description 8
- 238000002360 preparation method Methods 0.000 description 8
- 238000010438 heat treatment Methods 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 5
- 229910052751 metal Inorganic materials 0.000 description 5
- 239000002184 metal Substances 0.000 description 5
- 239000000243 solution Substances 0.000 description 4
- YMMGRPLNZPTZBS-UHFFFAOYSA-N 2,3-dihydrothieno[2,3-b][1,4]dioxine Chemical compound O1CCOC2=C1C=CS2 YMMGRPLNZPTZBS-UHFFFAOYSA-N 0.000 description 3
- 229920000144 PEDOT:PSS Polymers 0.000 description 3
- 239000002253 acid Substances 0.000 description 3
- 239000004417 polycarbonate Substances 0.000 description 3
- 229920000515 polycarbonate Polymers 0.000 description 3
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 2
- 229920000109 alkoxy-substituted poly(p-phenylene vinylene) Polymers 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- 239000004411 aluminium Substances 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 239000007864 aqueous solution Substances 0.000 description 2
- 239000002800 charge carrier Substances 0.000 description 2
- 230000008021 deposition Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 238000005538 encapsulation Methods 0.000 description 2
- 230000008020 evaporation Effects 0.000 description 2
- 238000001704 evaporation Methods 0.000 description 2
- 239000002346 layers by function Substances 0.000 description 2
- 239000012528 membrane Substances 0.000 description 2
- 238000005457 optimization Methods 0.000 description 2
- -1 poly(4-methyl-1-pentene) Polymers 0.000 description 2
- 229920003229 poly(methyl methacrylate) Polymers 0.000 description 2
- 239000004926 polymethyl methacrylate Substances 0.000 description 2
- 238000002310 reflectometry Methods 0.000 description 2
- 229910052710 silicon Inorganic materials 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 2
- 229920002799 BoPET Polymers 0.000 description 1
- 229910001218 Gallium arsenide Inorganic materials 0.000 description 1
- 239000004952 Polyamide Substances 0.000 description 1
- 239000004793 Polystyrene Substances 0.000 description 1
- NSLJAYQJTGJPBW-UHFFFAOYSA-N S1C=CC2=C1C=CS2.C2=CC=CC=C2 Chemical compound S1C=CC2=C1C=CS2.C2=CC=CC=C2 NSLJAYQJTGJPBW-UHFFFAOYSA-N 0.000 description 1
- 229920007962 Styrene Methyl Methacrylate Polymers 0.000 description 1
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 1
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 1
- MCEWYIDBDVPMES-UHFFFAOYSA-N [60]pcbm Chemical compound C123C(C4=C5C6=C7C8=C9C%10=C%11C%12=C%13C%14=C%15C%16=C%17C%18=C(C=%19C=%20C%18=C%18C%16=C%13C%13=C%11C9=C9C7=C(C=%20C9=C%13%18)C(C7=%19)=C96)C6=C%11C%17=C%15C%13=C%15C%14=C%12C%12=C%10C%10=C85)=C9C7=C6C2=C%11C%13=C2C%15=C%12C%10=C4C23C1(CCCC(=O)OC)C1=CC=CC=C1 MCEWYIDBDVPMES-UHFFFAOYSA-N 0.000 description 1
- 239000011358 absorbing material Substances 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- AMGQUBHHOARCQH-UHFFFAOYSA-N indium;oxotin Chemical compound [In].[Sn]=O AMGQUBHHOARCQH-UHFFFAOYSA-N 0.000 description 1
- ADFPJHOAARPYLP-UHFFFAOYSA-N methyl 2-methylprop-2-enoate;styrene Chemical compound COC(=O)C(C)=C.C=CC1=CC=CC=C1 ADFPJHOAARPYLP-UHFFFAOYSA-N 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229910021421 monocrystalline silicon Inorganic materials 0.000 description 1
- 239000004745 nonwoven fabric Substances 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
- 229910021420 polycrystalline silicon Inorganic materials 0.000 description 1
- 239000011116 polymethylpentene Substances 0.000 description 1
- 229920000306 polymethylpentene Polymers 0.000 description 1
- 229920005591 polysilicon Polymers 0.000 description 1
- SCUZVMOVTVSBLE-UHFFFAOYSA-N prop-2-enenitrile;styrene Chemical compound C=CC#N.C=CC1=CC=CC=C1 SCUZVMOVTVSBLE-UHFFFAOYSA-N 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000002210 silicon-based material Substances 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
- 238000004544 sputter deposition Methods 0.000 description 1
- 229920000638 styrene acrylonitrile Polymers 0.000 description 1
- 230000004083 survival effect Effects 0.000 description 1
- VJYJJHQEVLEOFL-UHFFFAOYSA-N thieno[3,2-b]thiophene Chemical compound S1C=CC2=C1C=CS2 VJYJJHQEVLEOFL-UHFFFAOYSA-N 0.000 description 1
- 239000012780 transparent material Substances 0.000 description 1
Classifications
-
- 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
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Abstract
The invention discloses a cascade polymer solar cell and a preparing method of the cascade polymer solar cell. The solar cell comprises a substrate, two (or more than two) cell units, interval layers connecting all layers and a packaging layer packaging the polymer solar cell. The two (or more than two) cell units are electrically separated by the transparent interval layers formed by usage of atomic layer deposition (ALT) technology, absorption of solar spectrums of each cell is not influenced, and integral sunlight absorptivity of the cascade cell can also be optimized through adjustment of the thickness of the interval layer. In addition, the design basically separates electrical design from optical design, and design cost is effectively reduced. Meanwhile, ALD film has the advantages of being good in compactness and good in adhesion and the like, can effectively protects the cell units below the film layer from being eroded by water and oxygen in outside air, and plays a role in packaging and prolongs service life of the cell.
Description
Technical field
The invention belongs to area of solar cell, particularly relate to a kind of cascade polymer solar energy panel its preparation method.
Background technology
Energy problem is the hot issue affecting human survival and development always.Along with economic scale expands, energy demand is constantly risen violently, and traditional fossil energy expends huge.Fossil energy is non-renewable resources, and the mankind's excessive use fossil energy will cause serious environmental issue.Therefore, developing pollution-free and reproducible new forms of energy is the extremely urgent tasks of the mankind.Solar energy is a kind of clean, and the new forms of energy of efficient and never exhaustion will be the important new forms of energy that human future development relies on.
The application of solar cell starts from the aerospace industry development in mid-term in last century.Be developed so far, three generations can be divided into, first generation solar cell is with monocrystalline or polysilicon for material, and second generation solar cell is then based on compound (as GaAs), and third generation solar cell comprises DSSC and polymer solar battery.Current first generation silicon materials solar cell still dominate.Modal is on the market crystal silicon solar energy battery, and the efficiency of its industrialization product is generally 13%-15%.Due to complex manufacturing, front two generation manufacture of solar cells cost higher, make its popularization be subject to severely restricts.
Polymer solar battery has attracted to pay close attention to widely due to its potential price advantage in recent years.Compared with silicon solar cell, polymer solar battery manufacture craft is simple, can make on flexible substrates, easy to carry, is one of developing direction of following solar cell.
At present, still there is the problem demanding prompt solution in the practical applications such as photoelectric efficiency on the low side and life-span is short in polymer solar battery.The application of tandem solar cell improves electricity conversion effective way.For polymer tandem solar cell, the film quality of wall requires very high, but traditional wall is generally by water-laid film, and film quality is general, and yields is low.And need two of device cascade devices except also will mutually mate on electrical parameter at absorption spectrum, which greatly enhances design difficulty and manufacturing technique requirent.
Summary of the invention
The problem that the requirement that is large and production technology of design difficulty for polymer solar battery in prior art is high, the invention provides and a kind ofly electrical design to be substantially separated with optical design and the polymer tandem cell structure of long service life.
A kind of cascade polymer solar cell, comprises the substrate set gradually, at least two battery units and encapsulated layer, and with wall between adjacent cell; Described wall is atomic layer deposition thin film.
Wherein, multiple battery unit should have difference and the optical absorption band gap of complementation, absorbs solar energy at vertical light inlet directional combination, thus improves the utilance of spectrum.Cathode thin film layer, anode buffer layer, Polymer Optoelectronic conversion layer and transparent anode thin layer that described battery unit is from the close-by examples to those far off set gradually by distance substrate are formed.
Described substrate can adopt fexible film (such as polymethyl methacrylate (PMMA) according to the actual requirements, polystyrene (PS), polycarbonate (PC), styrene-acrylonitrile, styrene-methylmethacrylate copolymer, poly(4-methyl-1-pentene), transparent polyamide etc.) or rigid substrate (such as glass etc.) obtain.
The battery unit of described polymer tandem solar cell is made in substrate at (comprising electrode part and functional layer part), according to the direction of sunlight incidence, multiple battery unit is divided into incident side (non-substrate side is incident side) battery unit and substrate side battery unit.
Wherein two lateral electrodes of incident side battery unit and resilient coating thereof are transparent membrane (or absorbing very little), and transparent material electrode can be the 4-ethylenedioxy thiophene of indium tin oxide (ITO) or high conductivity: polystyrolsulfon acid (PEDOT:PSS).And be metal electrode near the electrode of substrate, such as metallic aluminium or silver etc., this electrode has higher reflection coefficient, incident light can be reflected in a large number thus cause double absorption, increases the efficiency of light energy utilization.
Resilient coating mainly plays adjustment electrodes work functions, improves the effect of charge carrier delivery efficiency, solution spin-coating method can be adopted to make, and functional layer (Polymer Optoelectronic conversion layer) adopts solwution method spin coating printing or casting method preparation.
The wall of tandem cell of the present invention is the transparent membrane formed by technique for atomic layer deposition (ALD), and material can be aluminium oxide (Al
2o
3) etc. material transparent in visible-range.
As preferably, described wall is dielectric film, and thickness is 30nm ~ 200nm.Further preferably, described wall is aluminium oxide or hafnia film, and thickness is 30nm ~ 200nm.
The flexible package layer wrapped up outside battery main body, be Simplified flowsheet complexity, described encapsulated layer is atomic layer deposition thin film.
The same wall of material requirements of encapsulated layer, as preferably, described encapsulated layer is dielectric film, and thickness is 30nm ~ 100nm.Further preferably, described encapsulated layer is aluminum oxide film, and thickness is 30nm ~ 100nm.
Present invention also offers the preparation method of described cascade polymer solar cell, comprise the steps:
1) on substrate, battery unit is formed;
2) on battery unit, wall is formed by ald;
3) on wall, form the battery unit of the second layer;
4) step 2 is repeated) ~ 3), make the number of plies that battery unit reaches predetermined;
5) on the battery unit being in top layer, encapsulated layer is formed.
Consider the requirement of the aspect such as thickness, compactness of wall and encapsulated layer, as preferably, the process conditions of described step (2) sublayer, Central Plains deposition are: depositing temperature is 100 DEG C ~ 150 DEG C, and sedimentation time is 40 ~ 80 minutes; Forming encapsulated layer in described step (5) is by technique for atomic layer deposition, and the process conditions of described technique for atomic layer deposition are: depositing temperature is 100 DEG C ~ 150 DEG C, and sedimentation time is 40 ~ 80 minutes.
Compared with prior art, Inventive polymers tandem cell has following advantage:
(1) ALD deposition technique is used to form the transparent spacers film of material (the such as aluminium oxide etc.), electricity is separated two (or multiple) batteries of mutual cascade, but do not affect the absorption of each battery unit to solar spectrum, also can optimize the cell integrated sunlight absorptivity of cascade by the thickness of control interval layer.And electrical design is separated with optical design by this design substantially, effectively reduces design cost.
(2) simultaneously ALD film to have compactness good, the advantages such as tack is good, effectively can protect the battery unit under this thin layer to exempt from the erosion of water oxygen in outside air, serve the effect of encapsulation, improve the useful life of battery.
(3) mild condition of ALD film forming, temperature is lower, can not produce brokenly ring to polymeric material.
Accompanying drawing explanation
Fig. 1 is the preparation flow figure of cascade polymer solar cell of the present invention;
Fig. 2 is the overall structure figure of cascade polymer solar cell of the present invention;
Fig. 3 is the concrete structure figure of cascade polymer solar cell of the present invention;
Fig. 4 is the abosrption spectrogram by the cascode device after optical optimization.
Embodiment
Describe the present invention in detail below in conjunction with accompanying drawing and instantiation, but the present invention is not limited to this.
Figure 2 shows that the overall structure figure of cascade polymer solar cell of the present invention, comprise substrate and two battery units and ALD wall and ALD encapsulated layer.
As shown in Figure 3, example cascade battery of the present invention is thin film laminated structures, from substrate side to incident side, be followed successively by: Polymer Optoelectronic conversion layer 7, transparent anode layer 8, the flexible atom layer deposit film encapsulated layer 9 of substrate 1, metal cathode film layer and resilient coating 2 thereof, first kind absorption spectrum Polymer Optoelectronic conversion layer 3, transparent anode layer 4, ald aluminum oxide film wall 5, transparent cathode extremely resilient coating 6, Equations of The Second Kind absorption spectrum.
Next coming in order introduce above-mentioned 9 parts, and Fig. 1 shows the preparation flow of cascade polymer solar cell of the present invention.
Substrate 1, the needs according to using can select flexible substrate or rigid substrate, are the characteristic advantage of the flexible pliable of outstanding polymer solar battery in this example, adopt flexible substrate, use high temperature resistant, stable chemical nature and the smooth PET film of face type, thickness is about 0.8 millimeter.Clean with nonwoven fabrics before use, ensure dustless.
On substrate 1, formed the metallic cathode of about 100nm by the deposit metal films technology that sputtering or hot evaporation etc. are conventional, in this example, use the metallic aluminium (Al) that chemical property is comparatively stable.Then titanium oxide (the TiO of hot evaporation about 2nm
x) film is as cathode buffer layer.For regulating cathode work function number, improve charge carrier delivery efficiency.This step forms above-mentioned high-reflectivity metal cathode thin film layer and resilient coating 2 thereof.
On high-reflectivity metal cathode thin film layer and resilient coating 2 thereof, spin coating forms certain thickness first kind absorption spectrum Polymer Optoelectronic conversion layer 3, poly-[1-methoxyl group-4-(2 '-ethyl-own oxygen base)-2 is used in this example, 5-styrene] (MEH-PPV): 6,6-phenyl-C61-methyl butyrate (PC
61bM), concrete operations: by MEH-PPV and PCBM, 1:4 mixes in mass ratio, is dissolved in chlorobenzene (CB) solution (concentration is 20 mg/ml).Spin speed is 2000rpm, and spin-coating time is 60s, forms the film that thickness is about 80nm.Spin coating to be placed in thermal station 150 DEG C of heating anneals 5 minutes.
On first kind absorption spectrum Polymer Optoelectronic conversion layer 3, spin coating forms transparent anode layer 4.This layer material is mix the high conductivity 4-ethylenedioxy thiophene obtained: polystyrolsulfon acid (PEDOT:PSS) aqueous solution, and model is PH1000.Spin speed is spin speed is 1000rpm, and spin-coating time is 60s, forms thickness and is about 110nm.Spin coating to be placed in thermal station 80 DEG C of heating 30 minutes, and evaporate to dryness is moisture wherein.
Above step completes the preparation of substrate side battery unit.
Next deposit certain thickness ald aluminum oxide film wall 5 by technique for atomic layer deposition (ALD) transparent anode layer 4, in this example, use aluminum oxide film (Al
2o
3).Technological parameter is as follows: depositing temperature 100 DEG C, and sedimentation time about 60 minutes, makes deposit thickness be about 30nm.
Start to prepare incident side solar battery cell on ald aluminum oxide film wall 5, first on wall, above-mentioned transparency electrode is formed by the method for spin coating, material is similarly PH1000, spin speed is spin speed is 1000rpm, spin-coating time is 60s, forms thickness and is about 110nm.Spin coating to be placed in thermal station 80 DEG C of heating 30 minutes, and evaporate to dryness is moisture wherein.Afterwards by the method for ald (ALD).Zinc oxide (ZnO) film is formed, depositing temperature 80 DEG C, deposit thickness 40nm on this layer.This step forms above-mentioned transparent cathode and to hold concurrently resilient coating 6.
On transparent cathode extremely resilient coating 6, spin coating forms certain thickness Equations of The Second Kind absorption spectrum Polymer Optoelectronic conversion layer 7, the alternate copolymer (PBDTTT-C) of a kind of benzene 1,4-Dithiapentalene and 1,4-Dithiapentalene is used in this example, concrete operations: by PBDTTT-C and 6,6-phenyl-C71-methyl butyrate (PC
71bM), 1:1.5 mixes in mass ratio, is dissolved in chlorobenzene (CB) solution (concentration is 20 mg/ml).Spin speed is 2000rpm, and spin-coating time is 60s, forms the film that thickness is about 120nm.Spin coating to be placed in thermal station 150 DEG C of heating anneals 5 minutes.
On Equations of The Second Kind absorption spectrum Polymer Optoelectronic conversion layer 7, spin coating shape PH1000 forms transparent anode layer 8, and method is with the preparation of transparent anode layer 4.This layer material is the high conductivity 4-ethylenedioxy thiophene that a kind of doping obtains: polystyrolsulfon acid (PEDOT:PSS) aqueous solution, and model is PH1000.Spin speed is spin speed is 1000rpm, and spin-coating time is 60s, forms the film that thickness is about 110nm.Spin coating to be placed in thermal station 80 DEG C of heating 30 minutes, and evaporate to dryness is moisture wherein.
The last technique for atomic layer deposition (ALD) that passes through on this conductive layer deposits certain thickness ald flexible atom layer deposition of aluminium oxide (Al
2o
3) thin-film encapsulation layer 10.Technological parameter is as follows: depositing temperature 100 DEG C, and sedimentation time is about 60min, makes deposit thickness be about 30nm.
Fig. 4 is the absorption spectrum by the cascode device after optical optimization, and the device absorption spectrum of corresponding wherein two kinds of absorbing materials, can see that the device after cascade combines the absorption spectrum of bi-material on absorption spectrum by contrast, improve the overall utilization rate of device to solar spectrum, improve efficiency.
Claims (3)
1. a cascade polymer solar cell, comprises the substrate set gradually, at least two battery units and encapsulated layer, and with wall between adjacent cell; It is characterized in that, described wall is atomic layer deposition thin film; Described wall is dielectric film, and thickness is 30nm ~ 200nm;
Described encapsulated layer is atomic layer deposition thin film; Encapsulated layer is dielectric film, and thickness is 30nm ~ 100nm;
Described cascade polymer solar cell is prepared by following methods:
Comprise:
1) on substrate, battery unit is formed;
2) on battery unit, wall is formed by ald; The process conditions of described ald are: depositing temperature is 100 DEG C ~ 150 DEG C, and sedimentation time is 40 ~ 80 minutes;
3) on wall, form the battery unit of the second layer;
4) step 2 is repeated) ~ 3), make the number of plies that battery unit reaches predetermined;
5) on the battery unit being in top layer, encapsulated layer is formed;
Described formation encapsulated layer is by technique for atomic layer deposition, and the process conditions of described technique for atomic layer deposition are: depositing temperature is 100 DEG C ~ 150 DEG C, and sedimentation time is 40 ~ 80 minutes.
2. cascade polymer solar cell as claimed in claim 1, it is characterized in that, described wall is aluminium oxide or hafnia film, and thickness is 30nm ~ 200nm.
3. cascade polymer solar cell as claimed in claim 1, it is characterized in that, described encapsulated layer is aluminum oxide film, and thickness is 30nm ~ 100nm.
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