EP3155670A1 - Dispositif électronique organique et son procédé de préparation - Google Patents
Dispositif électronique organique et son procédé de préparationInfo
- Publication number
- EP3155670A1 EP3155670A1 EP15729545.2A EP15729545A EP3155670A1 EP 3155670 A1 EP3155670 A1 EP 3155670A1 EP 15729545 A EP15729545 A EP 15729545A EP 3155670 A1 EP3155670 A1 EP 3155670A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- layer
- htl
- pss
- pedot
- neutral
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
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- C08G61/12—Macromolecular compounds containing atoms other than carbon in the main chain of the macromolecule
- C08G61/122—Macromolecular compounds containing atoms other than carbon in the main chain of the macromolecule derived from five- or six-membered heterocyclic compounds, other than imides
- C08G61/123—Macromolecular compounds containing atoms other than carbon in the main chain of the macromolecule derived from five- or six-membered heterocyclic compounds, other than imides derived from five-membered heterocyclic compounds
- C08G61/126—Macromolecular compounds containing atoms other than carbon in the main chain of the macromolecule derived from five- or six-membered heterocyclic compounds, other than imides derived from five-membered heterocyclic compounds with a five-membered ring containing one sulfur atom in the ring
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- H10K30/353—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 comprising blocking layers, e.g. exciton blocking layers
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- H10K85/113—Heteroaromatic compounds comprising sulfur or selene, e.g. polythiophene
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Definitions
- the present invention relates to the field of organic electronic devices, such as organic photovoltaic cells, organic light-emitting diodes (OLEDs) and organic photodetectors (OPDs). It relates in particular to an organic electronic device comprising a bilayer HTL layer consisting of a PEDOT: PSS-based layer called neutral and a layer based on PEDOT: PSS said acid.
- organic electronic devices such as organic photovoltaic cells, organic light-emitting diodes (OLEDs) and organic photodetectors (OPDs). It relates in particular to an organic electronic device comprising a bilayer HTL layer consisting of a PEDOT: PSS-based layer called neutral and a layer based on PEDOT: PSS said acid.
- Photovoltaic devices make it possible to convert solar energy into electrical energy, which makes them particularly attractive. However, they have conversion efficiencies and a lifetime limiting their fields of application.
- a photovoltaic cell comprises a stack consisting of (FIG. 1):
- the substrate (1) may be plastic or glass for example.
- the first conductive layer (2) constituting the anode may be a conductive metal oxide, for example ITO (indium-tin oxide), AZO (aluminum-zinc oxide), IZO (indium-zinc oxide) . It may also be in the form of a multilayer structure of the type AZO / Ag / AZO for example.
- the HTL layer (3) interposed between the anode (2) and the active layer (4) is a hole transport layer (HTL). It is a p-type conductive or semi-conductive layer which is generally made of conducting polymer PEDOT: PSS (poly (3,4-ethylenedioxythiophene): poly (4-styrenesulphonate)).
- the active layer (4) is a layer for absorbing photons. It allows the creation of free charge carriers (holes and electrons). It may be of polymeric type, in particular P3HT / PCBM, that is to say consisting of a mixture of poly (3-hexylthiophene) and [6,6] -phenyl-C6i-methyl butyrate compounds.
- the second conductive layer (5) that is to say the cathode, may be metal, especially aluminum and silver.
- This type of stack has certain drawbacks related in particular to the interface between the active layer (4) and the electrodes (2) and (5).
- the HTL layer (3) constitutes the anode side interface. As already indicated, it is generally carried out in PEDOT: PSS. However, the high density of sulfonate groups on the PSS chains, relative to the density of the positive charges on the PEDOT chains, leads to an increase in the acidity of the HTL layer.
- the acidity of the HTL layer in PEDOT: PSS, as well as the acidity of the PEDOT: PSS solution implemented to form said layer can damage the anode (2) (in particular of conductive metal oxide). This is particularly the case when the substrate is plastic. Indeed, the conductive metal oxide deposited on the plastic substrate to form the anode (2) can not be annealed at an elevated temperature because of the nature of the substrate. Consequently, the structure of the layer constituting the anode (2) is more fragile and constitutes a point of weakness for this type of photovoltaic cell.
- WO2007 / 031923 discloses a light emitting device, in which a portion of acidic groups of the PSS of the PEDOT: PSS buffer layer is esterified. The esterification is carried out after the deposition of the layer PEDOT: PSS on the anode. It is a superficial treatment. The part of the esterified layer, that is to say neutral, is thus in contact with the active layer so as not to inhibit the luminescence.
- the organic electronic device according to the present invention makes it possible to remedy the degradation of the performances, in particular in time and in operation.
- the Applicant has developed an organic electronic device whose structure makes it possible to improve the service life with respect to similar devices of the prior art.
- This device comprises an HTL layer based on PEDOT: PSS, specific to the interface between the anode and the active layer.
- This specific HTL layer makes it possible to combine the advantages resulting from an HTL layer formed from a composition / acid solution based on PEDOT: PSS, without weakening the layer of conductive or semiconductive material in contact with the substrate. .
- the present invention relates to an organic electronic device containing a stack comprising successively the following layers:
- a second layer E2 of conductive or semiconductor material a second layer E2 of conductive or semiconductor material.
- the HTL layer is a bilayer consisting of a layer based on PEDOT: PSS said neutral and a layer based on PEDOT: PSS said acid.
- the HTL layer is a bilayer consisting of a PEDOT layer: PSS said neutral and a PEDOT layer: PSS said acid. It is an organic electronic device having a conventional configuration in which said so-called acidic HTL layer is in contact with the active layer A, and said so-called neutral HTL layer is in contact with the first layer El. With this arrangement, the first layer El is not degraded by the acidity of the HTL layer based on PEDOT: PSS.
- This organic electronic device comprises a stack of layers on a polymeric substrate, in particular plastic.
- the polymeric substrate may advantageously be a material selected from the group consisting of polyethylene naphthalate (PEN); polyethylene terephthalate (PET); cyclic olefin copolymers (COC); polyimides such as Kapton® in particular.
- the polymeric substrate has a thickness advantageously between 50 micrometers and 200 micrometers.
- the organic electronic device according to the present invention also comprises a first layer El of conducting or semiconductor material.
- the layer E1 is advantageously in contact with the polymeric substrate. It is advantageously deposited on the polymeric substrate.
- This conductive or semiconductor material constituting the first layer E1 may advantageously be chosen from the group comprising conductive or semiconducting metal oxides. It may especially be ⁇ (indium-tin oxide), ⁇ (aluminum-zinc oxide), ⁇ (indium-zinc oxide); of GZO (gallium-doped zinc oxide).
- the first layer E1 can also be in the form of a multilayer structure of the type AZO / Ag / AZO for example or IZO / Ag / IZO.
- the first layer El constitutes the anode of the organic electronic device.
- This first layer El is advantageously in contact with the HTL layer which is a hole-transporting layer.
- the layer E1 has a thickness advantageously between 100 and 500 nanometers.
- the HTL layer consists of a stack of two superimposed layers, respectively formed of a so-called HTL layer called neutral and an HTL so-called acid layer, the two layers being composed of PEDOT: PSS.
- the PEDOT: PSS polymer blend is generally in the form of a colloidal solution. The adjustment of the pH of this mixture thus makes it possible to deposit each of the layers of PEDOT: PSS said neutral and acid.
- so-called neutral HTL layer is meant that the layer PEDOT: PSS of the stack has been formed from a composition or solution based PEDOT: PSS neutralized.
- the so-called neutral HTL layer is made from a composition or solution based on PEDOT: PSS having a pH greater than or equal to 5, and more preferably a pH of between 5 and 8 and preferably 5 to 8. and 7.
- the layer thus formed is then composed of PEDOT: PSS with preferably N Syn + type counter-ions, primary ammonium RNH 3 + , secondary ammonium R 1 R 2 NH 2 + , tertiary ammonium quaternary ammonium R 1 R 2 R 3 R 4 N + , Na + , or K + .
- so-called acidic HTL layer is meant that the PEDOT: PSS layer of the stack has been formed from a composition or solution based on PEDOT: PSS acid.
- the so-called acidic HTL layer is made from a composition or solution based on PEDOT: PSS having a pH of less than 5, and more preferably a pH of between 1 and 3.
- the layer thus formed is then composed of PEDOT: PSS with preferably H + counterions.
- the neutral HTL layer has a thickness advantageously between 10 and 40 nanometers.
- the acidic HTL layer has a thickness advantageously between 10 and 100 nanometers.
- the HTL layer consisting of neutral and acid layers has a thickness advantageously between 20 and 110 nanometers, more preferably between 30 and 60 nanometers.
- the organic electronic device according to the present invention also comprises an active layer A.
- the active layer A is based on organic molecules or polymer. It may also be based on an organometallic compound, advantageously a halogenated organometallic compound.
- polythiophene derivatives p-type polymer
- P3HT poly (3-hexylthiophene)
- PCBM fullerene derivatives
- PCBM [6,6] Methylphenyl-cis-butyrate
- the active layer A has a thickness advantageously between 80 and 500 nanometers, and more preferably between 200 and 500 nanometers.
- the organic electronic device according to the present invention also comprises a second layer E2 of conductive or semiconductor material.
- the layer E2 is advantageously in contact with the active layer. It is advantageously deposited on the active layer.
- This conductive or semiconductor material constituting the second layer E2 may advantageously be chosen from the group comprising Ca, Al, Ag, Cu, the C60 / LiF / Mn / Al stack or the ETL / Ag bilayer with in particular TiO x or ZnO for the ETL layer (from the acronym "electron transporting layer").
- the second layer E2 constitutes the cathode of the organic electronic device.
- the nature of the polymeric substrate and the thickness of the layers constituting it allow the organic electronic device according to the present invention to have flexibility properties.
- the present invention also relates to a method for preparing the organic electronic device described above. This method comprises the following steps: providing a polymeric substrate covered with a first layer El of conducting or semiconductor material;
- a neutral HTL layer on the first layer El from a composition based on PEDOT: PSS having a pH greater than or equal to 5, advantageously between 5 and 8 and more advantageously between 5 and 7;
- an acidic HTL layer on the neutral HTL layer starting from a composition based on PEDOT: PSS having a pH of less than 5, advantageously between 1 and 3;
- the first layer E1 is deposited according to conventional techniques forming part of the general knowledge of those skilled in the art.
- the acidic HTL layer and the neutral HTL layer are deposited from an HTL layer material composition. These deposits are advantageously made by wet process.
- the technique used may in particular be chosen from the group comprising spin coating ("spin coating"); the impression ; coating; the inkjet; dye slot; silkscreen; gravure; and flexography.
- the neutral HTL layer is formed by wet deposition, followed by annealing.
- the acidic HTL layer is formed by wet deposition followed by annealing.
- the annealing of the neutral HTL layer is advantageously carried out at a temperature of between 80 and 140 ° C.
- the duration of this annealing is advantageously between 1 minute and 1 hour.
- the annealing of the neutral HTL layer is advantageously carried out under vacuum, typically between 1 and 5 mbar.
- the annealing of the neutral HTL layer makes it possible in particular to avoid the dissolution of the neutral HTL layer during the subsequent deposition of the acidic HTL layer.
- the annealing of the acidic HTL layer is advantageously carried out at a temperature of between 80 and 140 ° C.
- the duration of this annealing is advantageously between 1 minute and 30 minutes.
- the annealing of the acidic HTL layer is advantageously carried out under vacuum. According to a particular embodiment, it may be followed by a second annealing.
- the second annealing of the acidic HTL layer is advantageously carried out at a temperature of between 80 and 140 ° C.
- the duration of this annealing is advantageously between 1 and 5 minutes.
- the second annealing of the acidic HTL layer is advantageously carried out under air.
- the optional annealing of the active layer A is preferably carried out at a temperature above 50 ° C, and more preferably between 50 ° C and 140 ° C.
- the duration of this annealing is advantageously between 1 minute and 30 minutes.
- the second layer E2 is then deposited according to conventional techniques forming part of the general knowledge of the skilled person.
- the organic electronic device described above may be an organic photovoltaic cell (OPV); an organic photodiode (OPD) or in an organic light-emitting diode (OLED).
- OCV organic photovoltaic cell
- OPD organic photodiode
- OLED organic light-emitting diode
- FIG. 1 illustrates a conventional photovoltaic cell of the OPV type.
- FIG. 2 illustrates the HTL hole transport layer according to the present invention.
- FIG. 3 corresponds to the conversion efficiency of solar energy into electrical energy for photovoltaic cells deposited on a glass substrate.
- FIG. 4 corresponds to the conversion efficiency of solar energy into electrical energy for photovoltaic cells deposited on a plastic substrate.
- FIG. 5 illustrates a particular embodiment of a photovoltaic cell according to the invention. DETAILED DESCRIPTION OF THE INVENTION
- the organic electronic device object of the present invention may comprise the stack represented by FIG. 2, that is to say at least:
- the organic electronic device photovoltaic cell
- the organic electronic device also comprises an active layer A and a second layer E2 of conductive or semiconductor material on the acidic HTL layer.
- the first layer El and the second layer E2 respectively constitute the electrodes of the organic electronic device and in particular the anode and the cathode in the case of a photovoltaic cell.
- the organic electronic device may also include additional layers that may be interposed.
- additional layers that may be interposed.
- a particular embodiment represents, as an alternative embodiment, a tandem-type organic photovoltaic cell with the stack illustrated in FIG. 5. This stack comprises, in succession:
- PET polyethylene terephthalate
- PSS N + A one layer of PEDOT: neutral PSS + one layer of PEDOT: PSS acid
- P3HT / PCBM poly (3-hexylthiophene) / [6,6] -phenyl-C6i-methyl butyrate, with a weight ratio of 1/1
- An ITO layer is formed on a glass substrate.
- the HTL layer (N or A) is produced in the following way: A neutral or acidic PEDOT: PSS composition is deposited on the ITO layer by spin so as to obtain an HTL layer whose thickness is 45 nanometers .
- the HTL layer thus obtained is annealed in an oven for 30 minutes at 180 ° C. and in air.
- the HTL N + A layer (double layer) is produced as follows:
- a composition of PEDOT: PSS neutral is deposited on the spinning glass substrate, so as to obtain a layer of 25 nanometers.
- the HTL N layer thus obtained is annealed in an oven for 30 minutes at 180 ° C. and in air.
- a 20 nanometer layer of PEDOT: PSS A is deposited from a solution of PEDOT: PSS A diluted to 50% in water.
- the HTL N + A layer thus obtained is annealed in an oven for 30 minutes at 180 ° C. and in air.
- the active layer composed of P3HT: PCBM (1: 1 mass ratio)
- PCBM PCBM (1: 1 mass ratio)
- An annealing of 10 minutes at 140 ° C. is then carried out on a heating plate in an inert atmosphere (glove box).
- the cathode of C60 (2nm) / LiF (Inm) / Mn (10nm) / Al (200nm) is carried out by evaporation under vacuum.
- the HTL layer (N or A) is formed as follows:
- a neutral or acidic PEDOT: PSS composition is deposited on the ITO layer by spin so as to obtain an HTL layer whose thickness is 45 nanometers.
- the HTL layer thus obtained is annealed in a vacuum oven overnight at 80 ° C. It is then annealed for 5 minutes at 120 ° C. on a hot plate under air.
- the HTL N + A layer (double layer) is produced as follows:
- a composition of PEDOT: PSS neutral is deposited on the PET substrate by spin, so as to obtain a layer of 25 nanometers.
- the HTL N layer thus obtained is annealed in a vacuum oven for 15 minutes at 80 ° C.
- a 20 nanometer layer of PEDOT: PSS A is deposited from a solution of PEDOT: PSS A diluted to 50% in water.
- the HTL N + A layer thus obtained is annealed in a vacuum oven overnight at 80 ° C. An annealing of 5 minutes at 120 ° C. is then carried out on a heating plate under air.
- the active layer, composed of P3HT: PCBM (1: 1 mass ratio) is deposited on the HTL layer (N, A or N + A) by spin coating in an inert atmosphere (glove box). to obtain a thickness of 200 nanometers. An annealing of 10 minutes at 120 ° C. is then carried out on a heating plate in an inert atmosphere (glove box).
- the cathode of C60 (2nm) / LiF (Inm) / Mn (10nm) / Al (200nm) is carried out by evaporation under vacuum.
- the lifetime of the photovoltaic cells according to Examples CE-1 to CE-5 and INV-1 was tested.
- FIG. 3 accelerated degradation of the cell having a neutral HTL layer (CE-1) relative to the cell having an acidic HTL layer (CE-2).
- FIG. 4 a clear degradation of the cells having an acid (EC-5) or neutral (EC-4) HTL layer relative to the cell having an acid + neutral (N + A) HTL layer ( INV-1).
- the neutral HTL layer induces accelerated aging due to a specific problem at the interface with the active layer (a problem common to both types of substrate).
- the acidic HTL layer induces a specific problem at the interface with ⁇ plastic substrate (PET).
- HTL N + A layer makes it possible to obtain overall performance and stability superior to a structure comprising only a neutral HTL layer (CE-4) and much greater than a structure comprising only an acidic HTL layer (EC-4). 5).
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- Chemical Kinetics & Catalysis (AREA)
- Polymers & Plastics (AREA)
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- Medicinal Chemistry (AREA)
- Health & Medical Sciences (AREA)
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Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR1455221A FR3022079B1 (fr) | 2014-06-10 | 2014-06-10 | Dispositif electronique organique et son procede de preparation |
| PCT/FR2015/051421 WO2015189494A1 (fr) | 2014-06-10 | 2015-05-29 | Dispositif électronique organique et son procédé de préparation |
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| Publication Number | Publication Date |
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| EP3155670A1 true EP3155670A1 (fr) | 2017-04-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP15729545.2A Withdrawn EP3155670A1 (fr) | 2014-06-10 | 2015-05-29 | Dispositif électronique organique et son procédé de préparation |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US20170194567A1 (fr) |
| EP (1) | EP3155670A1 (fr) |
| JP (1) | JP2017520916A (fr) |
| KR (1) | KR20170016342A (fr) |
| FR (1) | FR3022079B1 (fr) |
| WO (1) | WO2015189494A1 (fr) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR3060853B1 (fr) * | 2016-12-15 | 2018-12-07 | Commissariat A L'energie Atomique Et Aux Energies Alternatives | Dispositif photovoltaique tandem comprenant une sous-cellule a base de perovskite et une sous-cellule a base de silicium |
| FR3083236B1 (fr) * | 2018-06-29 | 2020-12-04 | Dracula Tech | Composition de polymere conducteur et son procede de fabrication |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB0428444D0 (en) * | 2004-12-29 | 2005-02-02 | Cambridge Display Tech Ltd | Conductive polymer compositions in opto-electrical devices |
| EP1927145A2 (fr) * | 2005-09-15 | 2008-06-04 | Koninklijke Philips Electronics N.V. | Dispositif emetteur de lumiere et son procede de production |
| DE102005060159A1 (de) * | 2005-12-14 | 2007-06-21 | H. C. Starck Gmbh & Co. Kg | Transparente polymere Elektrode für elektro-optische Aufbauten |
| WO2009094663A2 (fr) * | 2008-01-25 | 2009-07-30 | University Of Washington | Dispositifs photovoltaïques comportant des couches de transport d'électrons en oxyde métallique |
| KR20110019636A (ko) * | 2009-08-20 | 2011-02-28 | 삼성모바일디스플레이주식회사 | 가요성 표시 장치용 기판 및 그 제조 방법과 상기 기판을 포함하는 유기 발광 표시 장치 |
-
2014
- 2014-06-10 FR FR1455221A patent/FR3022079B1/fr not_active Expired - Fee Related
-
2015
- 2015-05-29 JP JP2016570014A patent/JP2017520916A/ja active Pending
- 2015-05-29 EP EP15729545.2A patent/EP3155670A1/fr not_active Withdrawn
- 2015-05-29 KR KR1020167033509A patent/KR20170016342A/ko not_active Withdrawn
- 2015-05-29 US US15/314,331 patent/US20170194567A1/en not_active Abandoned
- 2015-05-29 WO PCT/FR2015/051421 patent/WO2015189494A1/fr not_active Ceased
Also Published As
| Publication number | Publication date |
|---|---|
| WO2015189494A1 (fr) | 2015-12-17 |
| FR3022079A1 (fr) | 2015-12-11 |
| FR3022079B1 (fr) | 2017-08-25 |
| KR20170016342A (ko) | 2017-02-13 |
| JP2017520916A (ja) | 2017-07-27 |
| US20170194567A1 (en) | 2017-07-06 |
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