WO2014193131A1 - Cellule solaire organique stratifiée - Google Patents

Cellule solaire organique stratifiée Download PDF

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Publication number
WO2014193131A1
WO2014193131A1 PCT/KR2014/004676 KR2014004676W WO2014193131A1 WO 2014193131 A1 WO2014193131 A1 WO 2014193131A1 KR 2014004676 W KR2014004676 W KR 2014004676W WO 2014193131 A1 WO2014193131 A1 WO 2014193131A1
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organic solar
solar cell
layer
electrode
single layer
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PCT/KR2014/004676
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English (en)
Korean (ko)
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장송림
배재순
이재철
이지영
이행근
김진석
조근
최정민
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주식회사 엘지화학
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Publication of WO2014193131A1 publication Critical patent/WO2014193131A1/fr

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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
    • H10K30/50—Photovoltaic [PV] devices
    • H10K30/57—Photovoltaic [PV] devices comprising multiple junctions, e.g. tandem PV cells
    • 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
    • H10K30/80—Constructional details
    • H10K30/81—Electrodes
    • H10K30/82—Transparent electrodes, e.g. indium tin oxide [ITO] electrodes
    • 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
    • H10K30/30—Organic devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation comprising bulk heterojunctions, e.g. interpenetrating networks of donor and acceptor material domains
    • 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
    • H10K30/50—Photovoltaic [PV] devices
    • 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

Definitions

  • the present specification provides a laminated organic solar cell.
  • the organic solar cell has a disadvantage of low energy conversion efficiency. Therefore, efficiency improvement is very important to secure competitiveness with other solar cells at this time.
  • Non-Patent Document 1 Two-layer organic photovoltaic cell (C.W.Tang, Appl. Phys. Lett., 48, 183. (1996))
  • Non-Patent Document 2 Efficiencies via Network of Internal Donor-Acceptor Heterojunctions (G. Yu, J. Gao, J. C. Hummelen, F. Wudl, A. J. Heeger, Science, 270, 1789. (1995))
  • the present specification is to provide a laminated organic solar cell.
  • An exemplary embodiment of the present specification includes a first electrode; A second electrode provided to face the first electrode; And at least two single-layered organic solar cells including at least one organic material layer including a photoactive layer provided between the first electrode and the second electrode, each provided between two adjacent single-layered organic solar cells. And a bonding layer, wherein the first electrode and the second electrode provide a laminated organic solar cell having a light transmittance of 20% or more and 100% or less in light having a wavelength of 450 nm.
  • the bonding layer positioned between each single-layer organic solar cell when absorbing light in one direction, is transparent to achieve a high light absorption rate compared to the organic solar cell having only one single-layer organic solar cell. In this way, high efficiency can be achieved.
  • the laminated organic solar cell of the present specification may absorb light in both directions, and may achieve high efficiency as compared with a single layer organic solar cell in the case of absorbing light in one direction only.
  • the laminated organic solar cell of the present specification may have a wound structure, and in the case of a cylindrical shape, may efficiently absorb light in various directions to increase efficiency.
  • 1 to 5 illustrate a laminated organic solar cell according to one embodiment of the present specification.
  • FIG. 6 shows graphs of current density-voltage (J-V) characteristics of organic solar cells according to Example 1, Comparative Example 1, and Comparative Example 2.
  • J-V current density-voltage
  • FIG. 7 is a graph showing physical properties of the photoactive materials included in the photoactive layers in Comparative Examples 3 to 5.
  • FIG. Specifically, Figure 7 is a graph measuring the absorbance of the photoactive material contained in the photoactive layer in Comparative Examples 3 to 5.
  • An exemplary embodiment of the present specification includes a first electrode; A second electrode provided to face the first electrode; And at least two single-layer organic solar cells including at least one organic material layer including a photoactive layer provided between the first electrode and the second electrode.
  • It includes a bonding layer provided between each of the two adjacent single-layer organic solar cells,
  • the first electrode and the second electrode provides a laminated organic solar cell having a light transmittance of 20% or more and 100% or less in light having a wavelength of 450 nm.
  • the first electrode and the second electrode may be a transparent electrode having a light transmittance of 40% or more and 90% or less in light having a wavelength of 450 nm.
  • the single layer organic solar cell of the present specification may operate as an individual organic solar cell even with one single layer organic solar cell. Therefore, the single layer organic solar cell may include a first electrode, a second electrode, and a photoactive layer, respectively, and may further include one or more organic material layers.
  • the multilayer organic solar cell may include two to ten single layer organic solar cells. Specifically, two to five single layer organic solar cells may be included. As the number of single-layer organic solar cells increases, the single-layer organic solar cells on the opposite side of the light receiving surface may have no light to absorb and thus may not contribute to the increase in efficiency. Therefore, the multilayer organic solar cell may be manufactured by controlling the number of single-layer organic solar cells in consideration of manufacturing cost and light absorption rate.
  • the laminated organic solar cell may absorb light from both sides, so that light absorption efficiency may increase. Furthermore, when the laminated organic solar cell absorbs light on both sides, the single layer organic solar cell on the other side absorbs excess light that is not absorbed by the single layer organic solar cell on the light receiving side as in the case of receiving light on one side. It is also possible to increase the light absorption rate. As an example of the case where the laminated organic solar cell receives light from both sides, the laminated organic solar cell may be disposed in a direction of reducing the incident angle of light without absorbing the stacked organic solar cell perpendicular to the light to absorb the light on both sides.
  • the first electrode and the second electrode may each independently be a transparent conductive oxide layer or a metal electrode having a thickness of 20 nm or less.
  • the metal electrode may be 10 nm or less.
  • the metal electrode may include a metal such as 20 nm or less of transparent Ag, Al, Au, or a mixture of the metals. Furthermore, according to one embodiment of the present specification, when the metal electrode has a thickness of 20 nm or less, light may transmit 30% to 100%.
  • the transparent conductive oxide layer is in addition to glass and quartz plate, polyethylene terephthalate (PET), polyethylene naphthelate (PEN), polyperopylene (PP), polyimide (PI), polycarbornate (PC), polystyrene (PS) ), Conductive materials on flexible and transparent materials such as POM (polyoxyethlene), AS resin (acrylonitrile styrene copolymer), ABS resin (acrylonitrile butadiene styrene copolymer) and plastics including TAC (Triacetyl cellulose), PAR (polyarylate), etc. This doped one can be used.
  • PET polyethylene terephthalate
  • PEN polyethylene naphthelate
  • PP polyperopylene
  • PI polyimide
  • PC polycarbornate
  • PS polystyrene
  • Conductive materials on flexible and transparent materials such as POM (polyoxyethlene), AS resin (acrylonitrile styrene copolymer), ABS resin (
  • ITO indium tin oxide
  • FTO fluorine doped tin oxide
  • AZO aluminum doped zink oxide
  • IZO indium zink oxide
  • ZnO-Ga 2 O 3 ZnO-Al 2 O 3 and antimony tin oxide (ATO)
  • ATO antimony tin oxide
  • the forming of the first electrode or the second electrode using the transparent conductive oxide layer may sequentially wash the patterned ITO substrate with a detergent, acetone, and isopropanol (IPA), and then remove moisture.
  • IPA isopropanol
  • the surface of the substrate can be modified to hydrophilic.
  • Pretreatment techniques for this are a) surface oxidation using parallel planar discharge, b) oxidation of the surface through ozone generated using UV ultraviolet light in a vacuum state, and c) oxygen radicals generated by plasma. To oxidize.
  • the bonding layer is glass; Transparent adhesive; And it may be selected from the group consisting of a transparent insulator.
  • the transparent bonding member and / or the transparent insulator may be a solid or liquid adhesive; Transparent double-sided tape; And transparent sealant materials.
  • the bonding layer when the shape of the bonding layer bonding surface is a shape including only an edge region of the bonding layer, the bonding layer may be transparent or opaque.
  • the mesh shape may include a pattern of closed figures of triangles, squares, hexagons, or polygons.
  • At least one of the bonding layers may be provided on a bottom surface of the transparent substrate.
  • At least one of the bonding layers may be provided between the transparent substrates of the two single layer organic solar cells adjacent to each other.
  • a photochemical upconversion layer may be further included between at least one pair of adjacent two single layer organic solar cells.
  • An example of the stacked organic solar cell including the photochemical upconversion layer of the present specification is illustrated in FIG. 5.
  • FIG. 5 shows a photochemical upconversion layer between two single layer organic solar cells.
  • the stacked organic solar cell according to the exemplary embodiment of the present specification is not limited to the structure of FIG. 5, and only one photochemical upconversion layer may be provided in the structure of FIG. 5.
  • the material included in the upconversion layer is PQ 4 Pd / Rubrene (PQ 4 Pd / rubrene), PQ 4 PdNA / Rubrene (PQ 4 PdNA / rubrene), Pd (II ) octaethylporphyrin / diphenylanthracene (Pd (II) octaethylporphyrin / diphenylanthracene), [Ru (dmb) 3 ] 2+ / anthracene ([Ru (dmb) 3 ] 2+ / anthracene).
  • the single layer organic solar cell may be a bi-layer junction type or a bulk heterojunction junction type depending on the structure of the photoactive layer.
  • the bi-layer junction type includes a photoactive layer composed of two layers, an electron acceptor layer and an electron donor layer.
  • the bulk heterojunction (BHJ) junction type includes a photoactive layer in which an electron donor material and an electron acceptor material are blended. Specifically, in the photoactive layer of the present specification, the electron donor material and the electron acceptor material may form a bulk heterojunction (BHJ).
  • the photoactive layer of the present specification may be annealed at 30 to 300 ° C. for 1 second to 24 hours to maximize properties after the electron donor material and the electron acceptor material are mixed.
  • the photoactive layer is a poly 3-hexyl thiophene [P3HT: poly 3-hexyl thiophene] as an electron donor, [6,6] -phenyl-C 61 -butyl acid methyl ester (PC 61 BM) and / or [6,6] -phenyl-C 71 -butyl acid methyl ester (PC 71 BM) as the electron acceptor material.
  • the mass ratio of the electron donor material P3HT and the electron acceptor material (PC 61 BM) and / or (PC 71 BM) may be 1: 0.4 to 1: 5, specifically 1: 0.7.
  • the photoactive layer is not limited to the above material.
  • the photoactive materials are dissolved in an organic solvent and then the solution is introduced into the photoactive layer in a thickness of 30 nm to 400 nm, specifically, 50 nm to 280 nm by spin coating or the like.
  • the photoactive layer may be applied to a method such as dip coating, screen printing, spray coating, doctor blade, brush painting.
  • the electron acceptor may include other fullerene derivatives such as C70, C76, C78, C80, C82, C84, including PC 61 BM, and the coated thin film may be heat-treated at 80 ° C. to 160 ° C. to determine the conductive polymer. It is good to increase the sex.
  • a hole transport layer may be introduced through spin coating, dip coating, inkjet printing, gravure printing, spray coating, doctor blade, bar coating, gravure coating, brush painting, thermal deposition, and the like.
  • poly (3,4-ethylenedioxythiophene): poly (4-styrenesulfonate) [PEDOT: PSS] is mainly used as a conductive polymer solution, and is used as a hole-extracting metal oxides material.
  • Molybdenum oxide (MoO x ), vanadium oxide (V 2 O 5 ), nickel oxide (NiO), tungsten oxide (WO x ) and the like can be used.
  • the hole transport layer may be formed to a thickness of 5 nm to 20 nm MoO 3 through a thermal deposition system.
  • the electron donor material is at least one electron donor; Or a polymer of at least one kind of electron acceptor and at least one kind of electron donor.
  • the electron donor may include at least one kind of electron donor.
  • the electron donor includes a polymer of at least one kind of electron acceptor and at least one kind of electron donor.
  • the electron donor material is thiophene-based, fluorene-based, carbazole-based, etc. starting with MEH-PPV (poly [2-methoxy-5- (2'-ethyl-hexyloxy) -1,4-phenylene vinylene]) It can be a variety of high molecular and monomolecular materials.
  • the polymer material is poly 3-hexyl thiophene (P3HT: poly 3-hexyl thiophene), PCDTBT (poly [N-9'-heptadecanyl-2,7-carbazole-alt-5,5- (4'-) 7'-di-2-thienyl-2 ', 1', 3'-benzothiadiazole)]), PCPDTBT (poly [2,6- (4,4-bis- (2, ethylhexyl) -4H-cyclopenta [2, 1-b; 3,4-b '] dithiophene) -alt-4,7- (2,1,3-benxothiadiazole)]), PFO-DBT (poly [2,7- (9,9-dioctyl-fluorene) ) -alt-5,5- (4,7-di 2-thienyl-2,1,3-benzothiadiazole)]), PTB7 (Poly [[4,8-bis
  • the electron acceptor material may be a fullerene derivative or a nonfullerene derivative.
  • the fullerene derivative may be a C60 fullerene derivative or a C70 fullerene derivative.
  • the fullerene derivative may be selected from the group consisting of C76 fullerene derivative, C78 fullerene derivative, C84 fullerene derivative, and C90 fullerene derivative.
  • the C76 fullerene derivative, C78 fullerene derivative, C84 fullerene derivative and C90 fullerene derivative are each independently hydrogen; heavy hydrogen; Halogen group; Nitrile group; Nitro group; Imide group; Amide group; Hydroxyl group; Substituted or unsubstituted alkyl group; A substituted or unsubstituted cycloalkyl group; Substituted or unsubstituted alkoxy group; Substituted or unsubstituted aryloxy group; Substituted or unsubstituted alkylthioxy group; Substituted or unsubstituted arylthioxy group; Substituted or unsubstituted alkyl sulfoxy group; Substituted or unsubstituted aryl sulfoxy group; Substituted or unsubstituted alkenyl group; Substituted or unsubsti
  • the fullerene derivative has an ability to separate electron-hole pairs (exciton, electron-hole pair) and charge mobility compared to the non-fullerene derivative, which is advantageous for efficiency characteristics.
  • the nonfullerene derivative has a LUMO energy level of -2.0 to -6.0 eV. In another exemplary embodiment, the nonfullerene derivative has a LUMO energy level of -2.5 to -5.0 eV. In another exemplary embodiment, the nonfullerene derivative has an LUMO energy level of -3.5 to -4.5 eV.
  • the nonfullerene derivative is a single molecule or a polymer that is not spherical.
  • At least two of the single layer organic solar cells may absorb light of different wavelength bands.
  • At least two of the single layer organic solar cells may have different wavelength bands of absorbing light.
  • the wavelength band of light absorbed by each single layer organic solar cell is different, the amount of light absorbed in the same area may be increased, thereby increasing the efficiency of the battery.
  • the photoactive layer of the uppermost single layer organic solar cell that receives the light absorbs light in the short wavelength region, and the photoactive layer of the single layer organic solar cell becomes longer in the lower wavelength region.
  • the absorption of light in a unit area can be maximized.
  • the photoactive layer of the lower single layer organic solar cell absorbs the light of the long wavelength region, only the light of the short wavelength region is absorbed in the upper single layer organic solar cell, and the light of the extra long wavelength region passing through the upper single layer organic solar cell It can be absorbed efficiently in a single layer organic solar cell.
  • any one single layer organic solar cell absorbs light having a wavelength of 300 nm to 700 nm, and the other single layer organic solar cell absorbs light having a wavelength of 400 nm to 800 nm. It may be.
  • At least two of the single layer organic solar cells may include a photoactive material absorbing light of different wavelength bands.
  • At least two of the single layer organic solar cells may adjust the photoactive material concentration of each photoactive layer to absorb light of different wavelengths.
  • At least two of the single layer organic solar cells may adjust the mass ratio of the electron donor material and the electron acceptor material of the photoactive layer to absorb light of different wavelengths.
  • the electron donor material and the electron acceptor material of the photoactive layers of the two single layer organic solar cells may be used as different materials.
  • the concentration of the photoactive layer of any one single layer organic solar cell is more than 3% and 7% or less, and the thickness is more than 100 nm. 300 nm or less, the concentration of the photoactive layer of the other single layer organic solar cell may be 0.01% or more and 3% or less, and the thickness may be 10 nm or more and 100 nm or less.
  • the hole transport layer and / or the electron transport layer material of the present specification may be a material that increases the probability that the generated charge is transferred to the electrode by efficiently transferring electrons and holes to the photoactive layer, but is not particularly limited.
  • the multilayer organic solar cell may be a flexible organic solar cell.
  • the substrate may comprise a flexible material.
  • the substrate may be a glass, plastic substrate, or film substrate in the form of a thin film that can be bent.
  • the laminated organic solar cell may have a wound structure.
  • the laminated organic solar cell may be manufactured in a flexible film form, and may be rolled into a cylindrical shape to form a solar cell having a hollow structure.
  • the laminated organic solar cell may be installed in a manner of standing on the ground. In this case, while the sun at the position where the laminated organic solar cell is installed moves from east to west, it is possible to secure a portion where the incident angle of light is maximum. Therefore, while the sun is floating, there is an advantage to increase the efficiency by absorbing as much light as possible. Furthermore, it may also have the advantage of increasing the light absorption rate, including the above-mentioned single-layer organic solar cell of the upper and lower.
  • the ZnO precursor solution was prepared by using a hydrolysis reaction in advance, and the ZnO precursor solution was spin coated on the ITO substrate, and then heat-treated to remove the remaining solvent to complete the electron transport layer.
  • the photo-opening voltage of the embodiment is increased compared to the single-layer organic solar cell in the laminated organic solar cell including two single-layer organic solar cell while maintaining a similar value while increasing the optical short circuit current density
  • the photoelectric conversion efficiency was about 2.49%, and Example 1 showed an efficiency increase of up to 60% or more from 4.02%.

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Photovoltaic Devices (AREA)

Abstract

Un mode de réalisation de la présente invention concerne une cellule solaire organique stratifiée comprenant : au moins deux ou plusieurs cellules solaires organiques monocouches comprenant un ou plusieurs types de couches organiques comportant une première électrode, une seconde électrode formée en face de la première électrode, et une couche photoactive formée entre la première électrode et la seconde électrode ; et des couches adhésives respectivement formées entre les deux cellules solaires organiques voisines uniques, les première et seconde électrodes étant des électrodes transparentes ayant une transmittance optique de 20 %-100 % inclus à une longueur d'onde optique de 450 nm.
PCT/KR2014/004676 2013-05-27 2014-05-26 Cellule solaire organique stratifiée WO2014193131A1 (fr)

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KR10-2013-0059727 2013-05-27

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109817809A (zh) * 2019-01-14 2019-05-28 华南协同创新研究院 一种三元有机太阳电池及其制备方法

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20080257399A1 (en) * 2007-04-19 2008-10-23 Industrial Technology Research Institute Bifacial thin film solar cell and method for making the same
KR20100134404A (ko) * 2009-06-15 2010-12-23 (주) 이피웍스 태양전지 모듈
US20120118366A1 (en) * 2009-07-30 2012-05-17 Industry-University Cooperation Foundation Hanyang University Double-sided light-collecting organic solar cell
KR20130017271A (ko) * 2011-08-10 2013-02-20 한국과학기술원 Ｄｎａ 절단효소 또는 메틸전이효소 활성 분석용 그라핀 산화물 기반 키트
KR20130044462A (ko) * 2011-10-24 2013-05-03 주식회사 동진쎄미켐 염소 이온이 흡착된 이산화티탄 나노입자 및 이의 제조방법

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20080257399A1 (en) * 2007-04-19 2008-10-23 Industrial Technology Research Institute Bifacial thin film solar cell and method for making the same
KR20100134404A (ko) * 2009-06-15 2010-12-23 (주) 이피웍스 태양전지 모듈
US20120118366A1 (en) * 2009-07-30 2012-05-17 Industry-University Cooperation Foundation Hanyang University Double-sided light-collecting organic solar cell
KR20130017271A (ko) * 2011-08-10 2013-02-20 한국과학기술원 Ｄｎａ 절단효소 또는 메틸전이효소 활성 분석용 그라핀 산화물 기반 키트
KR20130044462A (ko) * 2011-10-24 2013-05-03 주식회사 동진쎄미켐 염소 이온이 흡착된 이산화티탄 나노입자 및 이의 제조방법

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109817809A (zh) * 2019-01-14 2019-05-28 华南协同创新研究院 一种三元有机太阳电池及其制备方法

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