WO2009071821A2 - Substrat porteur d'une electrode, dispositif electroluminescent organique l'incorporant, et sa fabrication - Google Patents
Substrat porteur d'une electrode, dispositif electroluminescent organique l'incorporant, et sa fabrication Download PDFInfo
- Publication number
- WO2009071821A2 WO2009071821A2 PCT/FR2008/052108 FR2008052108W WO2009071821A2 WO 2009071821 A2 WO2009071821 A2 WO 2009071821A2 FR 2008052108 W FR2008052108 W FR 2008052108W WO 2009071821 A2 WO2009071821 A2 WO 2009071821A2
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- WO
- WIPO (PCT)
- Prior art keywords
- electroconductive
- substrate
- layer
- network
- strands
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- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 1
- 229920002554 vinyl polymer Polymers 0.000 description 1
- 239000011800 void material Substances 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 238000001039 wet etching Methods 0.000 description 1
- 239000010969 white metal Substances 0.000 description 1
- 229910001928 zirconium oxide Inorganic materials 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K50/00—Organic light-emitting devices
- H10K50/80—Constructional details
- H10K50/805—Electrodes
- H10K50/81—Anodes
- H10K50/814—Anodes combined with auxiliary electrodes, e.g. ITO layer combined with metal lines
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B82—NANOTECHNOLOGY
- B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
- B82Y40/00—Manufacture or treatment of nanostructures
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K2102/00—Constructional details relating to the organic devices covered by this subclass
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K50/00—Organic light-emitting devices
- H10K50/80—Constructional details
- H10K50/85—Arrangements for extracting light from the devices
Definitions
- the present invention relates to a carrier substrate of an electrode, the organic electroluminescent device incorporating it and its manufacture.
- the known organic electroluminescent systems or OLED comprise a material or a stack of organic electroluminescent materials supplied with electricity by electrodes generally framing in the form of electroconductive layers.
- the upper electrode is a reflective metal layer, for example aluminum
- the lower electrode is a transparent layer based on indium oxide, generally the indium oxide doped with tin better known under the abbreviation ITO of thickness of the order of 100 to 150 nm.
- ITO abbreviation
- US7172822 also proposes an OLED device whose electrode closest to the substrate comprises an irregular network conductor obtained by filling a cracked mask. More specifically, between the glass substrate and the OLED active layer, the OLED device successively comprises:
- a gel-sol layer forming the microfissured mask after annealing, of thickness equal to 0.4 ⁇ m; the grating conductor, based on gold, obtained by catalytic deposition, this network conductor having an equal square resistance of 3 Ohm / square and a light transmission of 83%,
- the domains between the fracture lines are asymmetrical with two characteristic dimensions: one parallel to the crack propagation direction between 0.8 and 1 mm, the other perpendicular between 100 and 200 ⁇ m.
- This electrode has electroconductive properties and acceptable transparency, the square resistance being equal to 3 Ohm / square and the light transmission of 82%. However, the reliability of the OLED device with such an electrode is not assured.
- a soil based on water, alcohol and a silica precursor is deposited, the solvent is evaporated and annealed at 120 ° C. for 30 minutes.
- This method of manufacturing an electrode by cracking of the sol gel mask constitutes an advance for the manufacture of a network conductor by eliminating for example the use of photolithography (exposure of a resin to a radiation / beam and development), but can still be improved, especially to be compatible with industrial requirements (reliability, simplification and / or reduction of manufacturing steps, at a lower cost, etc.).
- the manufacturing process of the network necessarily requires the deposition of an modifiable sub-layer (chemically or physically) at the openings to either allow a preferred adhesion (of metal colloids for example) or allow the grafting of catalyst for post-growth of metal, this sub-layer therefore having a functional role in the growth process of the network.
- the crack profile is in fact V fracture mechanics of the elastic material which involves using a post-mask process to grow the metal network from the colloidal particles at the base of V.
- the aim of the invention is to obtain a high performance OLED electrode (high conductivity, adapted transparency) which is reliable, robust, reproducible, and can be produced over large areas, all on an industrial scale and preferably at a lower cost and as easily as possible.
- this electrode also contributes to increasing the overall performance of the OLED device (light output, uniformity of illumination, etc.).
- the present invention firstly relates to a carrier substrate on a main surface of a composite electrode, which comprises: an electroconductive network formed of the strands which is a layer
- the grating having a light transmission of at least 60% at 550 nm, or even an integrated light transmission T L d at least 60%, the space between the strands being filled with a so-called filling material,
- an electroconductive coating covering the electroconductive network, with a thickness greater than or equal to 40 nm, and in electrical connection with the strands, with a pI resistivity of less than 10 5 ohm. cm and greater than the resistivity of the material forming the strands of the network, the coating forming a smoothed electrode outer surface,
- the filling material being electroconductive with a resistivity p2 greater than the resistivity of the network p0 and less than the resistivity p1, or with a resistivity p2 greater than p1, with a thickness greater than the thickness of the strands, the electroconductive coating then covering said material filling, or the filling material being in said electroconductive material, the electroconductive coating then substantially filling the space between the strands,
- the composite electrode further having a square resistance less than or equal to 10 Ohm / square.
- the composite electrode according to the invention thus comprises a buried electroconductive network (by the filler material or not the electroconductive coating) whose surface is smoothed to avoid introducing electrical defects in the OLEDs.
- the surface of the electroconductive coating is the outer electrode surface.
- the surface of the electroconductive coating may preferably be intended to be in contact with the organic layers of the OLED: in particular the hole injection layer ("HIL" in English) and / or the hole transport layer (“HTL”). " in English).
- the electroconductive filler notably removes the gap between the high level and the low level of the electrode network.
- the electroconductive coating eliminates the risk of short circuits generated by spike effects resulting from an uncontrolled surface microroughness of the strands (coated with the filling material) and / or the surface of the electroconductive filler between the strands.
- the electroconductive coating according to the invention may be in direct contact or not with the strands. Either II is separated from the strands by the distinct electroconductive filler, in excess of the height of the strands. Either it is in contact with the strands when the filler is in the material of the coating. The surface of the filling material then immediately forms the smoothed electrode surface.
- the surface of the filler may form a first level of smoothing and the surface of the electroconductive coating separate a second level of finer smoothing.
- the electroconductive coating according to the invention thus makes it possible to further smooth the surface of the network coated with the distinct electroconductive filler.
- the network conductor described in US7172822 is covered with a thin polymeric layer that matches the difference in level between the network conductor and the cracked mask.
- the invention thus attaches to an electrode in a network of strands which can be relatively thick and / or spaced, to control the roughness of the electrode on several scales (first by burying the network through the filler to remove the steep steps and then by smoothing it sufficiently) and, d to ensure appropriate electrical and transparency properties of an electrode made of several materials (strand material (s), a filler material which may or may not be electroconductive coating) or even to improve the performance of IOLED.
- the electroconductive filler may be mono or multicomponent, mono or multilayer.
- the filler may advantageously have at least one of the following functions:
- the electroconductive coating according to the invention by its resistivity, its coverage of the network and its coverage of the distinct electroconductive filler, and by its thickness, maintains a sufficient vertical conductivity when the filler is of resistivity p2 greater than the resistivity of the network pO and lower than the resistivity pi in order to avoid losses of the light output by an increase in the series resistance (requiring an increase in the voltage applied to constant current).
- the electroconductive coating according to the invention by its resistivity, its coverage of the network and its coverage of the electroconductive filler distinct, and by its thickness, contributes to a better distribution of the current, when the filler is electroconductive, resistivity p2 greater than pi.
- the resistivity of the electroconductive coating pi may be less than or equal to 10 3 Ohm. cm, and even less than or equal to 10 2 Ohm. cm.
- the network may be in the form of lines for example parallel or in the form of closed patterns (strands interconnected between them, defining meshes), for example geometric (rectangle, square, polygon %) and possibly patterns, irregular shape and / or irregular size.
- B the average distance between the strands (especially corresponding to an average mesh size)
- A the average width of the strands
- B + A the average period of the possibly irregular network.
- the filler is electroconductive, the pI resistivity of the electroconductive coating may be relatively large.
- the filler is electroconductive, for example resistivity p2 less than or equal to 10 3 Ohm. cm, preferably with a filling thickness greater than or equal to half the height of strands, in particular greater than or equal to 200 nm.
- the resistivity pi may then preferably be less than or equal to 10 3 Ohm. cm.
- the filler is poorly conductive.
- the resistivity p1 may then preferably be less than or equal to 10 -1 ohm.cm, in particular when the network is dense (typically less than or equal to 50 microns)
- the pi resistivity can then even more preferably be less than or equal to 10 -2 ohm. cm or even less than or equal to 10 "4 Ohm cm.
- the resistivity pi may be at least ten times greater than p2 to decrease sensitivity to short circuits.
- the surface of the electrode according to the invention is not necessarily planarized by the coating. It can be wavy. Indeed, the electroconductive coating can smooth the surface first by forming sufficiently spreading undulations. It is therefore important to remove sharp angles, abrupt deviations.
- the external surface is such that starting from a real profile of the external surface over the period average of the B + A network and forming a profile corrected by nanometric filtering to eliminate the local microroughness, an angle formed by the tangent to the corrected profile with the average plane of the corrected profile (or real) is obtained at any point of the corrected profile; ) less than or equal to 45 °, even more preferably less than or equal to 30 °.
- an atomic force microscope can be used.
- An image of the real surface is formed over a square period (A + B) 2 of the network. This image or a section of this image is used, thus forming the real profile of the surface along a given axis.
- the analysis length A + B for the profile is useful because it reflects the roughness profile.
- the average period of the B + A network is typically submillimetric, preferably between 10 ⁇ m and
- the real profile is corrected by realizing (at any point) a moving average at the scale between 50 and 200 nm, for example 100 nm, and then determining, for each point, the angle between the mean plane and the tangent to the plane. profile.
- This nanometric filtering serves firstly to rule out accidents on a short scale.
- the residual profile that is to say the actual profile minus the corrected profile.
- the residual profile may thus have a maximum altitude difference between the highest point and the lowest point ("peak to valley" parameter) of less than 50 nm, even more preferably less than or equal to
- the residual profile may furthermore have a roughness parameter R.M.S less than or equal to 50 nm, or even 20 nm (otherwise called Rq), or even 5 nm over the average period of the B + A network.
- R.M.S stands for Root Mean Square roughness. This is a measure of measuring the value of the mean square deviation of roughness.
- the R.M.S parameter therefore, quantifies on average the height of the peaks and troughs of residual roughness (local microroughness), relative to the average height (residual).
- a 10 nm RMS means a double peak amplitude.
- the boundary conditions on angles and the micro-roughness residual can be preferably satisfied on the majority of the electrode surface. To verify this, measurements can be made on different areas distributed (evenly) over the entire surface.
- certain zones such as, for example, the electrode edges, being able to be passive, for example for the connection or to form several light zones.
- the angle measurements can also be made in another way by a mechanical system tip (using for example the measuring instruments marketed by VEECO under the name DEKTAK).
- the outer surface of the electroconductive coating may further have very large scale corrugations, typically one or more millimeters.
- the substrate, and by the same the external surface, can be curved.
- the light transmission of the network depends on the ratio B / A between the average distance between the strands B on the average width of the strands A.
- the ratio B / A is between 5 and even more preferably of the order of 10 to easily retain transparency and facilitate manufacture.
- B and A are respectively about 300 microns and 30 microns, 100 microns and 10 microns, 50 microns and 5 microns, or 20 microns and 2 microns.
- microns typically between 100 nm and 30 microns, preferably less than or equal to 10 microns, or even 5 microns to limit their visibility and greater than or equal to
- the preferred range is between 1 and 10 ⁇ m
- an average distance between strands B greater than A between 5 ⁇ m and 300 ⁇ m, or even between 20 and 100 ⁇ m, or even less than 50 ⁇ m to easily retain transparency.
- the dimensions A and B are therefore average dimensions.
- the average thickness of the strands can be between 100 nm and 5 ⁇ m, more preferably 0.5 to 3 ⁇ m, or even between 0.5 and 1.5 ⁇ m to easily maintain transparency and high conductivity.
- the composite electrode according to the invention can present:
- the composite electrode according to the invention can be used for a rear emission organic electroluminescent device ("bottom emission” in English) or for an organic emitting device emitting from the rear and the front.
- the light transmission T L may for example be measured on a T L substrate of the order of 90% or even more, for example a silicosocalocalic glass.
- the composite electrode according to the invention may be over a large surface, for example an area greater than or equal to 0.02 m 2 or even greater than or equal to 0.5 m 2 or 1 m 2 .
- a thick deposit of an electroconductive material can cover the strands without smoothing the surface sufficiently.
- the techniques of deposition by gas, chemical (“CVD” in English) or physical (“PVD” in English), including vacuum deposition (evaporation, spraying) reproduce or even amplify the irregularities of the initial surface. Then, to obtain a smoothed external surface, it is then necessary to carry out a subsequent operation of surfacing an electroconductive material, for example by mechanical action (polishing type).
- a liquid deposition technique is also used, in particular at least one of the following techniques: by printing (flat, rotary). .), in particular by flexographic printing, by gravure printing or else by liquid spray ("spray coating” in English), dip coating ("dip coating” in English), by curtain (“curtain” in English), by casting ("flow coating” in English), by spin coating (“spin coating” in English), by scraping ("blade coating” in English), by drawing ("wire- bar coating "in English), by coating, by ink jet (“ ink-jet printing "in English), by screen printing.
- the deposit may also be obtained by sol-gel route.
- the thickness of the electroconductive coating may be between 40 and 1000 nm and preferably between 50 and 500 nm.
- the electrically conductive coating and / or the optionally separate electroconductive filler may, for example, comprise or consist of a (TCO) layer, and for the electroconductive coating, it is preferable to choose simple tin oxides SnO 2 , zinc ZnO, indium In 2 O 3 as well as doped oxides, or even binary mixed oxides, especially ternary oxides of one or more of the abovementioned elements, in particular at least one of the following doped or mixed oxides is particularly preferred. : zinc oxide doped or alloyed with at least one of the following elements: aluminum, gallium, indium, boron, tin, (for example ZnO: Al, ZnO : Ga, ZnO: In, ZnO: B, ZnSnO),
- IGZO gallium and zinc
- ITO tin oxide doped with fluorine or with antimony
- TiO 2 Niobium doped titanium oxide
- electroconductive filler it is also possible to choose the aforementioned electroconductive materials or other oxides, especially high index, electrically insulating (charged with electrically conductive particles, in particular metal or transparent oxide (s) conductor (s) ) especially :
- TiO 2 titanium oxide
- tantalum oxide Ti 2 O 5
- nitrides such as Si 3 N 4 , AlN, GaN, optionally doped
- This electroconductive and high indexing fill layer may be made for example by PVD or CVD deposition.
- the electroconductive coating may for example comprise a layer containing metal nanoparticles or transparent oxide (s) conductor (s), as mentioned above, preferably between 10 and 50 nm to better limit and control the roughness of the deposit, nanoparticles optionally and preferably in a binder.
- s transparent oxide
- s transparent oxide
- the filler may comprise or consist of an essentially inorganic layer or inorganic organic hybrid.
- the filling material may for example comprise or consist of a gel sol layer based on metal oxide (s) conductor (s), simple or mixed such as those mentioned above.
- a gel sol layer based on metal oxide (s) conductor (s), simple or mixed such as those mentioned above.
- metal oxide (s) conductor (s) simple or mixed such as those mentioned above.
- the filler material that may be distinct from the electroconductive coating may comprise or consist of a layer containing (nano) metal particles or conductive oxide (s) as mentioned above, the (nano) particles are preferably of size between 10 and 50 nm to better limit and control the roughness of the deposit and preferably prepare the smoothing by an overlying electroconductive coating.
- the (nano) particles are optionally in a binder.
- (nano) metal particles one can choose (nano) particles based on Ag, Au, Al, Pd, Pt, Cr, Cu. Resistivity and transparency are adjusted for the concentration of (nano) particles in a binder.
- tin-doped indium oxide SnO 2 I (ITO)
- the composite electrode preferably has a limited ITO content for cost reasons.
- an ITO gel sol layer based on organometallic precursors has a maximum thickness of 150 nm, or even 50 nm.
- the nanoparticles can be deposited from a dispersion in a solvent (alcohol, ketone, water, glycol, etc.).
- a solvent alcohol, ketone, water, glycol, etc.
- Particle-based commercial products that can be used to form or fill layer (or electroconductive coating) are the products sold by Sumitomo Metal Mining Co. Ltd.
- the dispersions alone are mechanically weak because of the absence of binder between the particles. Also in order to ensure a better cohesion of the layer, it is preferred to mix them in a binder before their deposition (binder then distributed over the entire thickness of the filling layer).
- the binder may be electrically insulative or electroconductive.
- the binder can be organic, for example acrylic resins, epoxy, polyurethane.
- the electroconductive or electrically insulating binder for example
- the binder may be based on organometallic precursors preferably of the same chemical nature as the nanoparticles of conductive metal oxides.
- the desired resistivity for the coating and / or the filler layer is adjusted according to the formulation.
- Another alternative is to cover the non-binder-based nanoparticle-based filler layer with an electroconductive binder.
- the binder penetrates between the nanoparticles (at least on the outermost part of the filling layer) thus acting as a cement between the particles, for example at least on half a thickness (typically more than several hundreds of nm).
- the binder which remains on the surface then forms the electrocoating coating smoothing the surface and can protect the filler layer from mechanical aggression.
- the electroconductive binder can be any organic compound. Again, the electroconductive binder can be any organic compound.
- a mineral binder an organic mineral hybrid, in particular a gel sol based on organometallic precursors, preferably of the same chemical nature as the nanoparticles of metal oxides,
- the deposition process of the filling layer can be for example by spin or spray coating or by screen printing.
- the electroconductive coating may comprise or be constituted by an essentially inorganic or inorganic organic hybrid layer, for example a gel sol layer in particular based on simple or mixed conductive metal oxides such as those mentioned above.
- This layer is preferably less than or equal to 200 nm in thickness, in particular if it is a sol gel layer (in particular to avoid cracks due to the strong stresses in the layer).
- Soil-gels have the advantage of supporting even high heat treatments (eg quench type operation) and to resist UV exposures.
- transparent conductive oxide precursors are preferably chosen, in particular organometallic compounds or salts of these metals.
- precursors for tin oxide deposits SnCl 4 , sodium stannate, SnCl 2 (OAc) 2 , Sn (IV) alkoxide such as Sn (OtBu) can be chosen. 4 . It is also possible to choose any salt or organometallic compound known as a precursor of tin.
- organometallic compounds and salts in particular Sb (III) alkoxides and chlorides such as SbCl 3 or SbCl 5 .
- Sb (III) alkoxides and chlorides such as SbCl 3 or SbCl 5 .
- Mixed and / or doped oxide layers are obtained for example by mixing the precursors in the appropriate proportions and using the solvents compatible with said precursors.
- an antimony-doped tin oxide layer can be obtained from tin chloride and antimony chloride dissolved in water in the presence of urea and hydrochloric acid.
- Another example of elaboration consists in using tin tetraisopropoxide as a precursor in a water / alcohol / ethanolamine mixture and adding antimony chloride as a dopant.
- An example of gel-bed manufacturing of a layer of ITO is given on pages 19 to 25 of the thesis entitled "DEVELOPMENT AND CHARACTER RI SATI ON OF THIN FILMS OF INDIUM DOPE INOUM OXIDE OBTAINED BY GROUNDWAY". - GEL "by Ka ⁇ s DAOUDI, Order No.
- DX-400® sold by the company Sumitomo Metal Mining Co. Ltd. It is a paste based on tin and indium alkoxides, organic solvent and viscosity control agent.
- the precursors of the alkoxide metal oxides are used, for example, diluted in an organic solvent, for example a volatile alcohol.
- a volatile alcohol linear or branched C1 to C10 alcohols, in particular methanol, ethanol, hexanol, isopropanol or glycols, in particular ethylene, may be selected.
- glycol or volatile esters such as ethyl acetate.
- composition used for the deposition of the sol gel layer may advantageously also comprise other constituents, in particular water as hydrolysis agent, a stabilizing agent such as diacetone alcohol, acetylacetone, acetic acid, formamide.
- a stabilizing agent such as diacetone alcohol, acetylacetone, acetic acid, formamide.
- the precursors of the metal salt type are generally used in solution in water.
- the pH of the water can be adjusted by using acids or bases (for example hydrochloric acid, acetic acid, ammonia, sodium hydroxide) to control the condensation conditions of the precursors.
- Stabilizers such as diacetone alcohol, acetylacetone, acetic acid, formamide can also be used.
- drying is generally carried out between 20 and 150 ° C., advantageously at a temperature of the order of 100 ° C., followed by a heat treatment at a temperature of about 450 to 600 ° C. for a period of time. between a few minutes and a few hours, advantageously at a temperature of the order of 550 ° C. for a duration of the order of 30 minutes.
- the layers are generally not more than 150 nm thick, such thickness often being obtained by multiple deposits.
- the layers can be much thicker (greater than 500 nm without any problem with a single deposit).
- the conductivity is lower than in the case of the layers obtained from molecular precursors but remains correct. No high temperature heat treatment is necessary because the nanoparticles are already crystallized.
- a "TCO" layer developed from precursors is smoother than a layer made from (nano) particles.
- the electroconductive coating may also comprise or consist of a substantially polymer layer deposited by a liquid route optionally possibly capable of forming a binder for the (nano) electroconductive particles of the filling layer
- it is a layer of one or more conductive polymers of at least one of the following families:
- polythiophenes such as PEDOT (3,4-polyethylenedioxythiopene), PEDOT / PSS, that is to say (3,4-polyethylenedioxythiopene mixed with polystyrene sulphonate, and other derivatives described in application US 2004 253439, or else poly (acetylene) s, poly (pyrrole) s, poly (aniline) s, poly (fluorene) s, poly (3-alkyl thiophene) s, polytetrathiafulvalenes, polynaphthalenes, poly (p-phenylene sulphide), and poly (para-phenylene vinylene) s.
- polythiophenes it is possible to choose, for example, the product marketed by HC Strack under the name BAYTRON® or by the company Agfa under the name Orgacon®, or Orgacon EL-P3040®.
- the conductive polymer is part of the electrode and may also serve as a hole injection layer.
- the filler may also comprise or consist of a substantially polymer layer deposited by a liquid route.
- a substantially polymer layer deposited by a liquid route.
- it is a layer of one or more conductive polymers.
- the layers based on nanoparticles, in particular conductive metal oxides are more transparent (especially less colored), especially with a high thickness.
- the composite electrode, at least the filler and / or the electroconductive coating present (s) in the CIELAB diagram colorimetric coordinates a * and b * less than 5 in absolute value.
- the network arrangement can be obtained directly by deposit (s) electroconductive material (s) to reduce manufacturing costs.
- This direct network arrangement can be obtained directly by one or more appropriate deposit methods, for example by using an ink pad, or by ink jet (with a suitable nozzle).
- the electroconductive network may also be obtained directly by electroconductive deposition (s) through an array of openings of a mask on the substrate (mask subsequently removed), or even by electrically conductive deposition (s). preliminary in an etching network of the substrate formed for example by etching through said mask for example on a depth from 10 nm, preferably not above 100 nm, in particular of the order of 50 nm. This can promote the anchoring of the strands.
- a fluorinated plasma etching in particular under vacuum, for example by CF 4 , CHF 3 .
- CF 4 , CHF 3 under vacuum
- oxygen atmosphere it is possible to control the etching rate of the mask chosen in particular organic.
- the arrangement of the strands can be, then substantially the replica of that of the network of openings of the mask and the etching network (if any) for the innermost part.
- a stable mask is preferably chosen without resorting to annealing.
- a deposition by liquid route in particular by printing, by scraping an electroconductive ink and / or a vacuum deposition technique such as spraying, or even more preferably by evaporation.
- the deposit (s) may optionally be supplemented by an electrolytic refill using an Ag, Cu, Gold electrode or other high conductivity metal that can be used.
- the electroconductive network may be deposited in part in an etching network of the substrate, in particular glass as already seen.
- the substrate can be etched wet (for example with an HF solution for glass), it is possible to choose a sol gel mask with an adequate network of openings.
- the electroconductive network then described as self-organized, can be obtained by deposition (s) electroconductive material (s) in a network of self-generated openings of a mask on the substrate.
- the network of self-generated openings can for example be obtained by baking a continuous deposit of a suitable material for this purpose. These may be interstices or cracks, in particular those described in document US Pat. No. 7,172,822.
- the reduction in the number of technological steps required to make such a self-blown mask has a favorable influence on the production yields and costs of the desired end product.
- the autogenerated openings, and thus the strands, can be irregular, distributed aperiodically, (pseudo) random.
- the mask, preferably with autogenerated openings, is removed before depositing the electroconductive smoothing coating.
- the electroconductive coating can substantially fill the space between the strands to form a buried composite electrode simple and fast to manufacture.
- the filling material is thus the material of the coating. Its thickness may be in particular be at least one and a half times, or even twice as high as the height of the strands.
- an electroconductive coating deposited for example by printing (flexography in particular), by liquid spraying, by dipping, coating deposited in one or more passes.
- the space between the strands is filled, preferably over its entire height, with a so-called high index filling material having a refractive index greater than or equal to 1.65 at least at 550 nm, preferably throughout visible, even more preferably a refractive index between 1.65 and 2 at 550 nm, see in all the visible, preferably the distance B between strands is less than or equal to 50 microns, more preferably less than or equal to 30 microns, and the strands are of non-colored reflection metal (white metal), preferably silver and aluminum or platinum, chromium, palladium and nickel.
- a so-called high index filling material having a refractive index greater than or equal to 1.65 at least at 550 nm, preferably throughout visible, even more preferably a refractive index between 1.65 and 2 at 550 nm, see in all the visible, preferably the distance B between strands is less than or equal to 50 microns, more preferably less than or equal to 30 microns, and
- a filler material of index at least greater than or equal to the index of the active OLED system typically of optical index of the order of 1.7 to 1.9
- minus 0.05 is chosen.
- a low-absorbency filling material in particular with a visible absorption of less than 10 -2 cm -1, is preferred.
- top filling material of inorganic and electrically conductive index by addition of (nano) electroconductive particles it is possible to choose, for example, a deposit based on metal oxide as already indicated, in particular based on ZrO 2 , TiO 2 , Al 2 O 3. , Ta 2 O 5 . These oxides can be deposited under vacuum or preferably by liquid means. It can act from soil gels.
- hybrid gel sol layers obtained from metal precursors complexed with stabilizing agents.
- layers obtained from solutions of zirconium propoxide or titanium butoxide complexed with acetylacetone in alcohol medium. If it does not undergo heat treatment at high temperature to lead to the corresponding oxide, such a material consists of a metal oxyhydroxide complexed by organic molecules. The organic functions can be eliminated by heat treatment from 350 ° C. to obtain inorganic gel sol layers.
- a high-index inorganic filler it is also possible to choose a high-index glass frit (bismuth lead glass, etc.), for example deposited by screen printing, by liquid spraying and loaded with (nano) electroconductive particles.
- a high-index glass frit bismuth lead glass, etc.
- polymers poly (1-naphthyl methacrylate-co-glycidyl methacrylate), with 10 mol% of glycidyl methacrylate, poly (2,4,6-tribromophenyl methacrylate), poly ( 2,4,6-tribromophenyl methacrylate-co-glycidyl methacrylate) with 10 mol% glycidyl methacrylate, poly (2,6-dichlorostyrene), poly (2-chlorostyrene), poly (2-vinylthiophene), poly (bis (4- iodophenoxy) phosphazene), poly (N-vinylphthalimide), poly (pentabromobenzyl acrylate), poly (pentabromobenzyl methacrylate), poly (pentabromobenzyl methacrylate-co-glycidyl methacrylate) with 10 mol% of glycidyl
- polymers are marketed for example by Sigma-Aldrich.
- Another possibility to obtain a high index filler is to choose transparent materials with high index particles, polymeric or inorganic, and high-index materials already mentioned above, for example we choose particles ZrO 2 , TiO 2 , SnO 2 , AI 2 O 3 .
- Sol-gel-type transparent material may be chosen from silica prepared from tetraethoxysilane (TEOS), sodium, lithium or potassium silicate or hybrid obtained from organosilane precursors whose general formula is:
- TEOS tetraethoxysilane
- organosilane precursors whose general formula is:
- R1 an alkyl function of the type C x H 2x + I
- R2 an organic group comprising, for example, an alkyl, epoxy, acrylate, methacrylate, amine or phenyl function , vinyl.
- silicones epoxy resins, polyurethanes PU, ethylene vinyl acetate EVA, polyvinyl butyral PVB, polyvinyl acetate PVA, and acrylics can be selected.
- the high-index filler may be weakly electroconductive (before or without addition of (nano) electroconductive particles), resistivity p2 greater than the resistivity of the network as already described.
- This high-index material can cover the surface of the strands, to form a layer underlying the electroconductive coating or even form the electroconductive coating according to the invention. Its thickness is greater than the height of the conductive strands
- the filler is electroconductive and diffusing, in particular based on scattering particles (possibly electroconductive) and (nano) electroconductive particles as already mentioned.
- a diffusing electroconductive filler having a blur of greater than 5% may be preferred.
- the diffusing (possibly electroconductive) particles may be dispersed in a binder, for example an electroconductive binder, in proportions of 1 to 80% by weight of the mixture.
- These diffusing particles may have an average size greater than 50 nm and submicron, preferably between 100 and 500 nm, or even between 100 and 300 nm.
- the index of the diffusing particles may advantageously be greater than 1.7 and that of the binder be preferably less than 1.6, for example silica or an organosilicon hybrid material.
- the diffusing particles may be organic, for example in the above-mentioned high-index polymeric material.
- these diffusing particles may be inorganic, preferably nitrides, carbides or oxides, the oxides being chosen from alumina, zirconia, titanium or cerium or being a mixture of at least two of these oxides.
- the binder of the diffusing filling material may be preferably selected from essentially mineral binders, such as potassium silicates, sodium silicates, lithium silicates, aluminum phosphates, silica, and glass frits .
- organosilane binders as described above for transparent materials.
- the diffusing filling material may be deposited by any layer deposition technique known to those skilled in the art, in particular by screen printing, by coating with a paint, by dipping, by spin-coating, by spraying, or still by casting or flow-coating.
- This diffusing filler layer makes it possible to increase the efficiency of the OLED, in particular for relatively large strand distances, ie from 30 ⁇ m and even more at 100 ⁇ m and beyond.
- the diffusing filling material can only partially fill the space, in particular being in the lower part of the space between the network, the upper part being in another filling material.
- the diffusing filling material may be with an insulating binder if it contains electroconductive (nano) particles. Its thickness may then be preferably between 20% and 100% of the height of the conductive strands and advantageously between 50% and 100% of the thickness of the strands.
- the diffusing filler may be weakly electroconductive, resistivity p2 greater than the resistivity of the network as already described.
- This diffusing filling material can even cover the surface of the strands, to form a layer underlying the electroconductive coating or even form the electroconductive coating according to the invention. Its thickness may then be possibly greater than the height of the conductive strands.
- electroconductive diffusing filling material it is possible to choose as an electroconductive diffusing filling material:
- a conductive polymeric material for example those already described for the electroconductive coating (PEDOT, PEDOT / PSS in particular), charged with diffusing particles,
- transparent oxide (s) conducting for example ITO, and / or a stack of diffusing particles.
- Electrically conductive filler can be chosen as molten glass frit (charged with (nano) electroconductive particles) or a gel sol layer (optionally filled with (nano) electroconductive particles).
- the sol-gel fill layer can comprise as essential constituent material at least one compound of at least one of the elements: Si, Ti, Zr, Sb, Hf, Ta, Mg, Al, Mn, Sn, Zn, Ce. It may be in particular a simple oxide or a mixed oxide of at least one of the aforementioned elements.
- the filling material may preferably be essentially based on silica, in particular for its adhesion and its compatibility with a mineral glass.
- the precursor sol of the material constituting the silica layer may be a silane, especially a tetraethoxysilane (TEOS) and / or a (methyltriethoxysilane) MTEOS, or a lithium, sodium or potassium silicate.
- the silica may be a hybrid obtained by or a compound of the general formula R2 n Si (ORl) 4-n as already mentioned above.
- the filling material preferably can be deposited preferably by screen printing, dipping, or liquid spraying.
- the overlying conductive coating may preferably be deposited by printing, such as by flexography, dipping, or liquid spraying.
- the electroconductive network may be composite, in particular multilayer.
- the electroconductive network may comprise or consist of an inexpensive and easy to manufacture metal oxide layer, for example zinc oxide ZnO, or tin oxide SnO 2 , or alternatively mixed oxide of indium and tin ITO.
- metal oxides are for example deposited by vacuum deposition, magnetron sputtering or ion beam assisted sputtering.
- the electroconductive network may be based on a pure metallic material selected from silver, aluminum or even platinum, gold, copper, palladium, chromium or based on said alloy material or doped with at least another material: Ag, Au, Pd, Al, Pt, Cu, Zn, Cd, In, Si, Zr, Mo, Ni, Cr, Mg, Mn, Co, Sn.
- the electroconductive network may comprise or consist of a layer of material (continuous medium) substantially metallic and / or a layer based on metal particles dispersed in an electroconductive matrix or not, for example an ink charged with conductive particles , in particular silver, such as the product TEC-PA-030® marketed by the company InkTec which can be deposited by scraping.
- a layer of material substantially metallic and / or a layer based on metal particles dispersed in an electroconductive matrix or not, for example an ink charged with conductive particles , in particular silver, such as the product TEC-PA-030® marketed by the company InkTec which can be deposited by scraping.
- the metal deposit or deposits may be supplemented by an electrolytic refill using an electrode Ag, Cu, Gold, or other high conductivity metal usable.
- Strands may be multilayer, in particular in a first metal layer of the aforementioned materials, in particular silver, aluminum, optionally topped with copper, and an overcoating protection against corrosion (water and / or air), for example oxides transparent conductive or metallic, especially nickel, or chromium or molybdenum or mixtures thereof, thickness from 10 nm, typically from 20 to 30 nm, and for example up to 200 nm or 100 nm.
- the overcoat is deposited by evaporation or spraying.
- the composite electrode according to the invention may be essentially mineral, even more preferentially, the substrate is also glass.
- the substrate may be flat or curved, and further rigid, flexible or semi-flexible.
- This substrate can be of large size, for example of surface greater than 0.02m 2 or even 0.5 m 2 or 1 m 2 and with a lower electrode occupying substantially the surface (
- the substrate may be substantially transparent, mineral or plastic such as polycarbonate PC or polymethyl methacrylate PMMA or PET, polyvinyl butyral PVB, PU polyurethane, polytetrafluoroethylene PTFE etc.
- the substrate is preferably glass, in particular of silicosodocalcic glass.
- the substrate may advantageously be a glass having an absorption coefficient of less than 2.5 m -1 , preferably less than 0.7 m -1 at the wavelength of the OLED radiation (s).
- silicosodocalcic glasses with less than 0.05% Fe III or Fe 2 O 3 are chosen, for example Saint-Gobain Glass Diamond, Pilkington Optiwhite glass or Schott B270 glass. All the extraclear glass compositions described in WO04 / 025334 can be selected.
- the thickness of the substrate in particular chosen glass, may be at least 0.35 mm, preferably at least 0.7 mm.
- the edges of the wafer of the substrate may also be reflective, and preferably comprise a mirror, to ensure optimum recycling of the guided radiation and the edges, form with the main face associated with the OLED system an external angle greater than or equal to 45 ° and less than 90 °, preferably greater than or equal to 80 °, to redirect the radiation over a wider extraction zone.
- the slice can be thus beveled.
- the method of manufacturing the electrode described in document US Pat. No. 7,172,822 necessarily requires the deposition of an modifiable under-layer at the level of the cracks in order to allow the grafting of catalyst for a post-growth of metal. layer thus having a functional role in the growth process of the network.
- This underlayer may furthermore have one or more of the following disadvantages: a low adhesion to a soda-lime glass substrate,
- the composite electrode according to the invention may preferably be directly on the substrate, in particular glass.
- the composite electrode according to the invention may be discontinuous, typically forming at least two isolated electrode regions, one of which the other, and preferably one or more parallel rows of composite electrode areas.
- the composite electrode is etched by laser and the created void is filled with a passivation material, for example polyamide.
- the carrier substrate of the composite electrode as defined above may further comprise an organic electroluminescent system deposited directly on the outer surface.
- the invention also relates to an organic electroluminescent device incorporating the carrier substrate of the composite electrode as defined above, the composite electrode forming the so-called lower electrode, the closest to the substrate.
- the organic electroluminescent device may include:
- a discontinuous upper electrode with an electroconductive layer in the form of electrode zones arranged on the electroluminescent layer areas.
- the electroluminescent layer areas may be shifted from the lower electrode areas in the row direction and in a given direction, and the upper electrode areas may be shifted from the electroluminescent areas in the direction of the row and in the same direction.
- the distance between the electroluminescent zones of distinct rows may be greater than the distance between the zones of the same row, preferably from 100 ⁇ m, in particular between 100 ⁇ m and 250 ⁇ m.
- Each row is thus independent. If one of the zones in each row is defective, the entire row still works. And the adjacent rows are intact.
- the organic electroluminescent device according to the invention can be supplied with or without the current leads.
- Two continuous or discontinuous current supply strips forming part of a collector or a current distributor may respectively be electrically connected to a peripheral edge of the lower composite electrode, and with a peripheral edge of the upper electrode.
- These current feed strips may preferably be between 0.5 to 10 ⁇ m thick and 0.5 mm wide and may be in various forms: a metal monolayer in one of the following metals: Mo, al,
- a metal multilayer from the following metals: Mo, Al, Cr, Nd, such as MoCr / Al / MoCr,
- TCC transparent conductive coating
- Au transparent conductive coating
- the upper electrode may be an electroconductive layer advantageously chosen from metal oxides, in particular the following materials: doped zinc oxide, especially aluminum ZnO: Al or gallium ZnO: Ga, or else indium oxide doped, especially tin (ITO) or zinc doped indium oxide (IZO).
- ITO tin
- IZO zinc doped indium oxide
- the OLED device can produce monochromatic light, especially blue and / or green and / or red, or be adapted to produce white light.
- mixture of compounds in a single layer, stack on the face of the electrodes of three organic structures (green red emission, blue) or two organic structures (yellow and blue), a series of three organic adjacent organic structures (emission red green, blue), on the face of the electrodes an organic structure in one color and on the other side suitable phosphor layers.
- the OLED device may comprise a plurality of adjacent organic electroluminescent systems, each emitting white light or, in a series of three, red, green and blue light, the systems being for example connected in series.
- Each row can for example emit according to a given color.
- the OLED device can be part of a multiple glazing, including a vacuum glazing or with air knife or other gas.
- the device can also be monolithic, include a monolithic glazing to gain compactness and / or lightness.
- the OLED system can be glued or preferably laminated with a another flat substrate said hood, preferably transparent such as a glass, using a lamination interlayer, in particular extraclair.
- the laminated glazings usually consist of two rigid substrates between which is disposed a sheet or a superposition of polymer sheets of the thermoplastic type.
- the invention also includes so-called "asymmetrical" laminated glazings using a particularly rigid carrier substrate of the glass type and as a substrate covering one or more protective polymer sheets.
- the invention also includes laminated glazings having at least one interlayer sheet based on a single or double-sided adhesive polymer of the elastomer type (that is to say not requiring a lamination operation in the conventional sense of the term, laminating imposing heating generally under pressure to soften and adhere the thermoplastic interlayer sheet).
- the means for securing the cover and the carrier substrate may then be a lamination interlayer, in particular a sheet of thermoplastic material, for example polyurethane (PU), polyvinyl butyral (PVB), ethylene vinyl acetate (EVA), or resin multi-component or multi-component heat-curable (epoxy, PU) or ultraviolet (epoxy, acrylic resin). It is preferably (substantially) of the same size as the cover and the substrate.
- the lamination interlayer may make it possible to prevent bending of the bonnet, particularly for devices of large dimensions, for example with an area greater than 0.5 m 2 .
- EVA offers many advantages:
- thermoplastic lamination interlayer may be preferred to a cast resin cover because it is both easier to implement, more economical and possibly more watertight.
- the interlayer optionally comprises a network of electroconductive son embedded in its surface, called internal, next to the upper electrode, and / or an electroconductive layer or electroconductive strips on the inner surface of the hood.
- the OLED system can be preferably placed inside the double glazing, with a particularly inert gas blade (argon for example).
- a coating having a given functionality on the opposite side of the carrier substrate of the electrode according to the invention or on an additional substrate. It may be an anti-fog layer (using a hydrophilic layer), antifouling (photocatalytic coating comprising at least partially crystallized TiO 2 in anatase form), or an anti-reflection stack of the type for example Si 3 NVSiO 2 ZSi 3 NVSiO 2 or a UV filter such as for example a layer of titanium oxide (TiO2). It may also be one or more phosphor layers, a mirror layer, at least one scattering layer of light extraction.
- the invention also relates to the various applications that can be found in these OLEDS devices, forming one or more transparent and / or reflecting luminous surfaces (mirror function) arranged both outside and inside.
- the device can form (alternative or cumulative choice) an illuminating, decorative, architectural, (etc.) system, a signaling display panel - for example of the drawing, logo, alphanumeric signage type, in particular an exit sign rescue -.
- the OLED device can be arranged to produce a uniform light, especially for uniform illumination, or to produce different light areas of the same intensity or distinct intensity.
- the organic electroluminescent system produces a direct light region, and another light zone is obtained by extraction of OLED radiation which is guided by total reflections in the thickness of the selected glass substrate.
- the extraction zone may be adjacent to the OLED system or on the other side of the substrate.
- the extraction zone or zones can be used, for example, to reinforce the illumination provided by the direct light zone, in particular for architectural lighting, or to indicate the light panel.
- the extraction zone or zones are preferably in the form of band (s) of light, in particular uniform (s), and preferably arranged (s) on the periphery of one of the faces. These strips can for example form a very bright frame.
- the extraction is obtained by at least one of the following means arranged in the extraction zone: a diffusing layer, preferably based on mineral particles and preferably with a mineral binder, the substrate made diffusing, in particular texture or rough.
- the two main faces may each have a direct light area.
- an illuminating window can in particular be produced. Improved lighting of the room is not achieved at the expense of light transmission. By also limiting the light reflection, especially on the outside of the illuminating window, this also makes it possible to control the level of reflection, for example to comply with the anti-glare standards in force for the facades of buildings.
- the device especially transparent part (s) or entirely, may be - for the building, such as an external light glazing, an internal light partition or a part (part) of light glass door including sliding,
- a transport vehicle such as a luminous roof, a (part of) side window light, an internal light partition of a land vehicle, aquatic or aerial (car, truck train, plane, boat, etc.),
- - intended for street or professional furniture such as a bus shelter panel, a wall of a display, a jewelery display or a showcase, a wall of a greenhouse, an illuminating slab, interior furniture, shelf or furniture element, furniture front, illuminated tile, ceiling lamp, illuminated refrigerator shelf, aquarium wall,
- display screen or display possibly dual screen, such as a television or computer screen, a touch screen.
- the small screen being preferably associated with a Fresnel lens to focus the light.
- one of the electrodes may be reflective or a mirror may be disposed on the opposite side of the OLED system, if it is desired to favor illumination of only one side in the direct light region.
- the illuminated panel can be used for lighting a bathroom wall or a kitchen worktop, to be a ceiling lamp.
- OLEDs are generally dissociated into two major families depending on the organic material used.
- the organic electroluminescent material of the thin layer consists of evaporated molecules such as for example the complex of AIQ 3 (tris (8-hydroxyquinoline) aluminum), DPVBi (4,4 '- (diphenylvinylene biphenyl)), the DMQA (dimethyl quinacridone) or DCM (4- (dicyanomethylene) -2-methyl-6- (4-dimethylaminostyryl) -4H-pyran).
- AIQ 3 tris (8-hydroxyquinoline) aluminum
- DPVBi 4,4 '- (diphenylvinylene biphenyl)
- the DMQA dimethyl quinacridone
- DCM dimethyl-6- (4-dimethylaminostyryl
- the emitting layer can also be, for example, a layer of 4.4 *, 4 # -tri (N-carbazolyl) triphenylamine (TCTA) doped with tris (2-phenylpyridine) iridium [Ir (ppy) 3 ].
- TCTA triphenylamine
- an SM-OLED consists of a hole injection layer stack or "HIL” for "HoIe Injection Layer” in English, hole transport layer or “HTL” for "HoIe Transporting””Layer” in English, emissive layer, electron transport layer or “ETL” for "Electron Transporting Layer.”
- HIL hole injection layer
- HTL hole transport layer
- ETL electron transport layer
- An example of a hole injection layer is copper phthalocyanine (CuPC)
- the transport layer of holes may be for example N, N'-Bis (naphthalen-1-yl) -N, N'-bis (phenyl) benzidine (alpha-NPB).
- the electron transport layer may be composed of tris (8-hydroxyquinoline) aluminum (Alq 3 ) or bathophenanthroline (BPhen).
- the upper electrode may be a Mg / Al or Li F / Al layer. Examples of organic electroluminescent stacks are for example described in US6645645.
- organic electroluminescent layers are polymers, they are called PLED (Polymer Light Emitting Diodes).
- the organic electroluminescent material of the thin layer consists of these polymers (pLEDs), for example PPV for poly (para-phenylene vinylene), PPP (poly (para-phenylene), DO-PPP
- the polymer layer is also associated with a layer which promotes the injection of holes ( HIL) consisting, for example, of PEDT / PSS (poly (3,4-ethylene-dioxythiophene / poly (4-styrene sulfonate)).
- HIL holes
- PLED An example of PLED consists of a following stack:
- PEDOT poly(styrenesulphonate)
- phenyl poly (p-phenylenevinylenene) PH-PPV 50 nm.
- the upper electrode may be a layer of Ca.
- the invention also relates to the method of manufacturing the composite electrode on the carrier substrate as defined above comprising, in a first configuration, the following steps: a first step of direct training of the driver's network arrangement, comprising at least one of the following depots:
- a second step comprising a liquid deposition of the electroconductive coating (distinct or otherwise from the electroconductive filler).
- an etching of the substrate through openings in the mask thus partially anchoring the network in the substrate
- the deposition of the electroconductive material of the network in the mask and possibly partly in the underlying etching network may preferably be achieved by a simple, non-selective deposition, preferably by vacuum deposition, in particular by evaporation, or still by liquid, in particular by scraping a conductive ink, by dipping, by printing (flat or rotary).
- This deposit is optionally supplemented by an electrolytic charging by a metal such as gold, silver, copper and / or possibly supplemented by a deposit (PVD, CVD %) of an overcoating protection against corrosion.
- a metal such as gold, silver, copper and / or possibly supplemented by a deposit (PVD, CVD %) of an overcoating protection against corrosion.
- the method according to the invention comprises a step of forming the mask comprising:
- a so-called masking layer depositing on the substrate (bare or coated) a so-called masking layer, in particular from a solution of colloidal particles stabilized and dispersed in a solvent,
- Such a network of openings has significantly more interconnections than the ground silica gel cracked mask.
- the mask thus has a random, aperiodic structure on at least one direction, or even two (all) directions.
- the width (average) of the micron or even nanometric network A in particular between a few hundred nanometers to a few tens of micrometers, in particular between 200 nm and 50 ⁇ m,
- - size (average) pattern B millimeter or submillimeter, in particular between 5 to 500 microns, or even 100 to 250 microns,
- the open mesh rate (non-emerging gap, "blind"), is less than 5%, or even less than or equal to 2%, in a given region of the mask, or even on the majority or the entire surface, therefore with a rupture limited network see almost zero, possibly reduced, and deleted by burning the network,
- the edges are constant spacing, parallel, especially at a scale of 10 microns (for example observed under an optical microscope with a magnification of 200).
- the width A may be for example between 1 and 20 microns, even between 1 and 10 microns, and B between 50 and 200 microns.
- the sizes of the strands may preferably be between a few tens of microns to a few hundred nanometers.
- the ratio B / A can be chosen between 7 and 20, or even 30 to 40.
- the meshes delimited by the openings are of various shapes, typically three, four, five sides, for example mainly four sides, and / or of various sizes, randomly distributed, aperiodic.
- the angle between two adjacent sides of a mesh can be between 60 ° and 110 °, in particular between 80 ° and 100 °.
- a main network is obtained with openings (possibly approximately parallel) and a secondary network of openings (possibly approximately perpendicular to the parallel network), whose location and distance are random.
- the secondary openings have a width for example less than the main openings.
- the drying causes a contraction of the mask layer and a friction of the nanoparticles at the surface inducing a tensile stress in the layer which, by relaxation, forms the openings.
- particles of limited size nanoparticles
- dispersion with preferably a characteristic (average) dimension between 10 and 300 nm, or even 50 and 150 nm
- the concentration of particles is adjusted, preferably between 5% and even 10% and 60% by weight, more preferably between 20% and 40%.
- the addition of binder is avoided.
- the solvent is preferably water-based or even entirely aqueous.
- the colloid solution comprises polymeric nanoparticles (and preferably with a water-based or even entirely aqueous solvent).
- acrylic copolymers, styrenes, polystyrenes, poly (meth) acrylates, polyesters or mixtures thereof are chosen.
- the solution comprises mineral nanoparticles, preferably silica, alumina, iron oxide.
- deposition and drying can preferably be carried out at a temperature below said temperature Tg for better control of the morphology of the grid mask.
- the deposition and drying steps of the process may in particular be carried out (substantially) at room temperature, typically between 20 ° and 25 ° C. Annealing is not necessary.
- the difference between the given glass transition temperature Tg of the particles and the drying temperature is preferably greater than 10 0 C or even 20 0 C.
- the deposition and drying steps of the process can be carried out work substantially at atmospheric pressure rather than vacuum drying for example.
- the drying parameters can be modified to adjust B, A, and / or the B / A ratio.
- the ratio B / A can be adjusted.
- the edges of the mask are substantially straight, that is to say in a mean plane between 80 and 100 ° relative to the surface, or even between 85 ° and 95 °.
- the deposited layer is discontinuous (no or little deposit along the edges) and the coated mask can thus be removed without damaging the grating.
- the deposited layer can be made both through the interstices and on the mask.
- the openings in the network may be cleaned prior to the development of the first deposition step, preferably using a plasma source at atmospheric pressure.
- the surface for the deposition of the mask layer based on colloids is film-forming, especially hydrophilic if the solvent is aqueous.
- This is the surface of the substrate: glass, plastic (polycarbonate for example) or an optionally functional added underlayer: hydrophilic layer (silica layer, for example on plastic) and / or alkali barrier layer and / or adhesion promoting layer of the gate material, and / or electroconductive layer (transparent).
- This sublayer is not necessarily a growth layer for electrolytic deposition of the gate material.
- the mask layer there can be several sub-layers.
- the substrate according to the invention may thus comprise an underlayer (in particular as a base layer, the closest to the substrate), which is continuous and may be an alkaline barrier.
- the basecoat is robust, easy and fast to deposit according to different techniques. It can be deposited, for example by a pyrolysis technique, especially in the gas phase (a technique often referred to by the abbreviation of C.V. D, for "Chemical Vapor Deposition"). This technique is interesting for the invention because appropriate settings of the deposition parameters make it possible to obtain a very dense layer for a reinforced barrier.
- the primer may be optionally doped with aluminum and / boron to make its vacuum deposit more stable.
- the bottom layer (monolayer or multilayer, possibly doped) may be between 10 and 150 nm thick, more preferably between 15 and 50 nm.
- the bottom layer may preferably be:
- silicon nitride based on silicon nitride, silicon oxynitride, silicon oxycarbonitride, layer of general formula SiNOC, in particular SiN, in particular Si 3 N 4 .
- a bottom layer (essentially) of Si 3 N 4 silicon nitride, doped or otherwise, may be particularly preferred. Silicon nitride is very fast to deposit and forms an excellent barrier to alkalis. As the adhesion promoter layer of the metal gate material
- the substrate is hydrophobic, one can add a hydrophilic layer such as a silica layer.
- a removal step is preferably provided by liquid means, for example by selective chemical dissolution of the mask (in water, alcohol, acetone, acidic or basic solutions), optionally in a hot state and / or or assisted by ultrasound until revealing said electroconductive network.
- This electroconductive filler may be optionally also diffusing, high index, and the materials already described, in particular be a sol-gel layer.
- the deposition can be carried out for example by printing, by screen printing, by scraping an ink, by dipping, by liquid spraying, depending on the chosen materials and formulations.
- the composite electrode is resistant to the following OLED manufacturing steps:
- FIG. 1 is a diagrammatic sectional view of a first organic electroluminescent device, which comprises a composite lower electrode according to a first embodiment of the invention
- FIG. 2 illustrates a schematic view from above of the network of the electrode used in the device of FIG.
- FIG. 3a is a schematic sectional view of a second organic electroluminescent device, which comprises a composite lower electrode according to a second embodiment of the invention
- FIGS. 3b and 3c are SEM photos of the surface of the filling material
- FIG. 4 is a schematic sectional view of a third organic electroluminescent device, which comprises a composite lower electrode according to a third embodiment of the invention.
- FIG. 5 is a schematic sectional view of a fourth organic electroluminescent device, which comprises a composite lower electrode according to a fourth embodiment of the invention.
- FIG. 1 voluntarily very schematic, represents in lateral section an organic electroluminescent device 100 (emission through the substrate or "bottom emission” in English).
- This device 100 comprises a planar substrate 1 made of silico-soda-lime glass, for example clear, for example rectangular, 0.7 mm thick, with first and second main faces 11, 12, the first main face 11 comprises:
- an organic electroluminescent system 3 for example an SM-OLED of following structure:
- the composite lower electrode 2 comprises first an aperiodic network conductor 21, 1 ⁇ m thick, formed of irregular strands based on silver, average width A of the order of 3 microns, and spaced between they have an average distance B of the order of 30 ⁇ m, with a B / A ratio of 10.
- B average width of the order of 3 microns
- a corrosion protection overcoat made of nickel and / or chromium, for example, or TCO, with a thickness of about ten nm, thus forming composite strands.
- the composite lower electrode 2 then comprises an electroconductive coating 22, the latter filling the space between strands and covering the strands so as to form a smoothed electrode outer surface.
- This electroconductive coating 22 is made of IZO material with a thickness above the strands of about 500 nm, and a resistivity pi of about 10 -2 ohm cm to better distribute the current.
- luminous T L of the composite electrode 2 is 60%.
- This electroconductive coating 22 is obtained, a sol-gel layer obtained from zinc acetate and indium nitrate dissolved in 2-methoxyethanol. Ethanolamine is used as a stabilizer. The molar ratio between zinc and indium is 0.5.
- the formulation is preferably deposited by dipping or liquid spraying. The deposited formulation is dried at 100 ° C. and then annealed at 500 ° C. for 1 hour.
- One variant consists in doping this material with gallium, the material is then called IGZO. This is accomplished by adding the desired amount of gallium nitrate to the soil.
- This electroconductive sol-gel coating 22 can also be obtained from InCl 3 and ZnCl 2 precursors.
- the electroconductive network 21 is manufactured by silver evaporation on a mask with a network of self-organized openings. The mask is removed afterwards. The irregular arrangement of the electroconductive network 21 with its strands 210 is shown in FIG.
- an opening of the composite electrode 2 near a longitudinal edge and preferably over its entire length is made for example by laser and is about 150 microns wide.
- This etched area is then passivated by means of an insulating resin 5 of acrylic type.
- bus bars 6 for example by serigraphing silver on the electrodes 2, 4.
- the device 100 produces a uniform illumination on a surface that can to be great. If it is desired to create a plurality of light zones, other suitable laser etchings, for example 150 ⁇ m wide, are made at the time of etching for the connection, and then passively.
- Figure 3a shows a sectional view of an organic electroluminescent device 200 which comprises a composite electrode 2 '. Only the modifications relative to the device 100 are detailed below.
- a filler layer 23 is used, formed of conductive oxide nanoparticles less than 50 nm in size. This layer 23 may be deposited with a solvent which is then evaporated.
- the electrically conductive filler layer is, for example, of resistivity p 2 between 10 -3 and 10 3 ohm-cm, preferably with p 2 less than 10 ⁇ -1, for which purpose a layer based on conductive transparent oxides, such as ZnO, SnO 2, is used.
- ITO, IZO deposited for example by dipping, by liquid spraying (in particular by gel sol) or by screen printing.To facilitate manufacture, its thickness is greater than that of the network 22, the filling layer then covering the network.
- the following products sold by Sumitomo Metal Mining Co. Ltd may be used:
- the electrically conductive coating 22 ' in PEDOT / PSS deposited by the liquid route, has a resistivity ⁇ 1 of the order of 10 -1 ohm ⁇ cm, with a thickness of the order of 100 nm, which covers the filling material further smoothing. the electrode 2 '.
- Example 2bis In a first variant of Example 2, to form the filler layer, a dispersion of SnO 2 : Sb (ATO) nanoparticles (for example 50% of ATO particles in water) is used up to cover the strands.
- the dispersion can be optionally diluted in water before it is deposited, for example by spin coating, depending on the desired thickness. It is for example to deposit the dispersion called Nanotek S1200W sold by Alfa Aesar pH ⁇ 3, dispersion which is diluted 2: 1 (by mass) in deionized water.
- the thickness of the layer is, for example, 1.5 ⁇ m (for a thickness of the strands of 1 ⁇ m).
- the T L of the substrate thus coated is greater than 80%.
- the resistivity varies from 3.5 to 9.2 ⁇ .cm for thicknesses between 0.45 to 2.3 ⁇ m.
- Figure 3b is a SEM image of the surface of the filler.
- the rms is 28 nm and the peak to valley is around 200 nm.
- a spin-coating layer is deposited, for example, a SnO 2 : Sb gel sol layer based on SnCI 2 and SbCl 3 precursors of thickness 200 nm.
- Heat treatment is carried out at 500 ° C. for 1 hour to consolidate the layer and obtain crystallization and electroconductivity.
- nanoparticles are not associated with a binder and the deposit is heat treated at 550 0 C.
- the gel sol layer penetrates at least the outer portion of the filler. By penetrating between the nanoparticles, it thus acts as a binder which has the effect of reinforcing the mechanical strength of the filling layer. Part of this gel sol layer covers the nanoparticles, thus forming the electroconductive coating giving a smoothed electrode surface.
- the rms of the surface can thus be lowered, for example less than or equal to 5 nm.
- the "peak to valley" can also be lowered, for example less than or equal to 20 nm.
- a thin conductive polymeric smoothing layer for example PEDOT, for example with a thickness of the order of 20 nm.
- the T L of the coated substrate remains greater than 80%.
- the formulation of SnO 2 : Sb based on organometallic precursors SnCl 2 and SbCl 3 in an alcoholic medium is specified here.
- the synthesis of SnO 2 : Sb soil is carried out in two steps.
- a first step are mixed in a 250 ml flask, 18 g of SnCl 2 , 2 H 2 O, 90 g of absolute ethanol. The mixture is heated at 60 ° C. under reflux and with stirring. The ethanol is then evaporated, open balloon,
- the mixture is stirred for 2 h at 50 ° C. and then cooled. Evaporation of the ethanol is carried out with stirring, until complete evaporation of the solvent. This step takes several hours. This step can be shortened by vacuum evaporation.
- a sol gel layer based on ZnO: Al is chosen as the electroconductive coating.
- a ZnO: Al gel sol layer based on Zn (CH3COO) 2 and AlCl 3 precursors is spin-coated.
- Heat treatment is carried out at 550 ° C. for 2 hours to consolidate the layer. It is preferred to perform the thermal treatment in a reducing atmosphere under N 2 , under N 2 and hydrogen (5% for example) for better electrical conductivity
- other dopants can be chosen: indium, yttrium, boron and zirconium.
- the ZnO: Al layer is however produced with less toxic precursors (zinc acetate and aluminum chloride, in the presence of complexing agent).
- the filling layer it is also possible to use a product of nanoparticles of ZnO: Al not in dispersion but in powder form marketed by Umicore, powder to be mixed for example with a sol gel type binder, for example ZnO: Al, such as as above, or a suitable organic binder.
- a sol gel type binder for example ZnO: Al, such as as above, or a suitable organic binder.
- Example 2bis it is also possible to insert SnO 2 : Sb nanoparticles into a sol, for example based on SnCl 2 / SbClI precursors.
- a water-based dispersion is unstable in the presence of ethanol in the soil. Also it is ensured that the two solutions are compatible, for example by choosing a compatible solvent-based dispersion (alcohol ).
- Example 2 In a second variant of Example 2, to form the filler layer, a dispersion of SnO 2 : I nanoparticles (ITO) (30% by weight) is deposited in a binder, forming a lacquer until covering the strands.
- the lacquer can be diluted in ethanol or diacetone alcohol. This is for example the lacquer called VP Adnano ITO LTH sold by EVONIK pH ⁇ 7, and which is diluted in ethanol (2: 1 by mass).
- the layer After deposition by spin-coating or alternatively by screen printing, the layer is consolidated at 120 ° C. to 1 h and preferably at 220 ° C., for example for 30 min, to improve the conductivity.
- a precursor colorless ink ITO gel sol, no toxic or polluting heavy solvent, ink called RBnano-ITO from RBnano ink called RBnano-ITO from RBnano.
- the deposit can be done by spraying, ink roller stamp, soaking. Drying is fast, in the air.
- the ink is fired between 400 ° C. and 600 ° C.
- Other products are sold by EVONIK:
- Coatings made with hybrid soils Mol.Cryst.Lig.Cryst.3374 (2002), 91, Al-Dahoudi et al., Have developed layers of 500 nm to 1 ⁇ m respectively by spin-coating and spray coating from nanoparticles. 25% by weight dispersed in an organosilane binder (epoxy or methacryloxy propyltriethoxysilane).
- organosilane binder epoxy or methacryloxy propyltriethoxysilane
- the thickness of the filler layer based on the lacquer is 1.5 ⁇ m (for a thickness of 1 ⁇ m strands). A lower thickness is nevertheless possible by changing the dilution of the EVONIK LTH lacquer in ethanol or by modifying the deposition parameters (higher spin-coating deposition rate, for example).
- the T L of the substrate thus coated is greater than 80%.
- the resistivity is 1 to 2 ⁇ .cm.
- Figure 3c shows the surface of the filler.
- the ITO layer made from EVONIK LTH lacquer consists of the agglomeration of nanoparticles. The nanoparticles are clearly visible on the surface. The area of the layer above a micro-grid strand may be slightly elevated.
- the aggregates of nanoparticles present on the surface generate a roughness that we measured by AFM.
- the rms roughness measured is about 15 nm for a micro-grid deposit and with a peak to valley is of the order of 100 nm.
- the layer of ITO nanoparticles is sufficiently conductive and does not modify the conductivity of the micro grid. Measured R & D remains unchanged.
- This transparent ITO-based layer fulfills the specifications in terms of thickness, electrical conductivity and mechanical resistance.
- electroconductive coating can be chosen (at least) a layer of PEDOT about 100 nm thick.
- the PEDOT polymer can then reduce the roughness rms of the conductive layer to 5 nm or less and the peak to valley to a value less than or equal to 20 nm.
- an electroconductive coating comprising a sol-gel layer, for example ITO, by synthesis based on indium (III) acetate, indium (III) chloride tetrahydrate precursors.
- Example 3 Figure 4 shows a sectional view of an organic electroluminescent device 300 which comprises a composite electrode 2. Only the modifications with respect to the device 100 are detailed below.
- the network 21 ' is less dense, with strands of average width A of the order of 10 microns, the average spacing between strands B being of the order of 100 microns.
- the space between the strands is filled by a diffusing filler layer 23 'formed for example of electroconductive particles of ITO 150 nm optionally dispersed in a binder for example a acrylic resin or in a mineral binder optionally electroconductive also.
- This layer may for example be screen printed.
- This electroconductive layer 23 ' has a resistivity p2 that is greater than the p1 resistivity, especially between 10 -1 and 10 ohm cm.
- its thickness is greater than that of the network 22, for example equal to 4 microns, the filling layer 23 'then covering the network 21'.
- the electroconductive coating 22 is an ITO gel sol layer deposited for example by dipping or by liquid spraying, having a thickness of the order of 200 nm or less (for example 150 nm)
- the electroconductive coating 22" completes the smoothing. Its resistivity pi is of the order of 10 -2 ohm cm.
- DX-400® sold by the company Sumitomo Metal Mining Co. Ltd. can be used. It is a paste based on tin and indium alkoxides, organic solvent and viscosity control agent.
- Example 4 Figure 5 shows a sectional view of an organic electroluminescent device 400 which comprises a composite electrode 20 '. Only the modifications with respect to the device 100 are detailed below.
- the electroconductive network 210 'of thickness 1 ⁇ m is partly in an etching network 110 of the glass 1, of 50 nm thick.
- a cracked sol-gel mask is used on the glass, for example based on hybrid or non-hybrid silica.
- the substrate is etched wet with an HF solution. Or, preferably, the mask with self-organized openings already described in Example 1 (and detailed later) is used and the fluorinated plasma substrate.
- the deposition of the material of the network is carried out by keeping the mask sol gel or nanoparticles based, the deposit being made through cracks.
- a vacuum deposit is preferably chosen, for example a silver deposit by evaporation, or a deposit of ITO or IZO by sputtering, possibly followed by an electrolytic deposition of copper and / or a nickel deposit. or chrome.
- the deposit thickness can be controlled to preferably completely fill the etched areas.
- PEDOT / PSS deposited by thick liquid from 1.5 ⁇ m.
- the outer surface of the coating is such that, starting from a so-called real profile of the external surface over the average period of the B + A grating and forming a profile corrected by nanometric filtering to eliminate the local microroughness, at any point of the corrected profile, an angle formed by the tangent to the corrected profile is obtained with the average plane of the corrected profile less than or equal to 45 °. Starting from the residual profile formed by the difference between the real profile and the corrected profile, a maximum altitude difference between the highest point and the lowest point of the residual profile in the corrected profile is obtained at any point in the corrected profile. less than 50 nm over the average period of the B + A network.
- the mask with self-generated openings is first made.
- a single emulsion of colloidal particles based on acrylic copolymer stabilized in water in a concentration of 40% by mass is deposited by liquid.
- the colloidal particles have a characteristic dimension of 80 to 100 nm and are marketed under the company DSM under the trademark Neocryl XK 52.
- the so-called masking layer incorporating the colloidal particles is then dried so as to evaporate the solvent.
- This drying can be carried out by any suitable method (hot air drying
- the system self-arranges and describes patterns according to a structure characterized by the average width of the pattern referred to as A1 and the mean distance between the patterns referred to below as Bl.
- This stabilized mask will be subsequently defined by the ratio Bl / Al.
- a stable mask is obtained without annealing.
- the ratio B1 / A1 can be modified by adapting, for example, the coefficient of friction between the compacted colloids and the surface of the substrate, or the size of the nanoparticles, or even the rate of evaporation, or the initial concentration of particles, or the nature of the solvent, or the thickness depending on the deposition technique.
- a single emulsion of colloidal particles based on acrylic copolymer stabilized in water is deposited in a mass concentration of 50%, a pH of 3, of viscosity equal to 200 mPa.s.
- the colloidal particles have a characteristic dimension of about 118 nm and are marketed under the company DSM under the trademark Neocryl XK 38® and have a Tg equal to 71 ° C.
- a 40% silica colloid solution with a characteristic dimension of about 10 to 20 nm, is deposited, for example the LUDOX® AS 40 product sold by Sigma Aldrich. The B / A ratio is about 30 or so.
- silica colloids typically, it is possible to deposit, for example, between 15% and 50% of silica colloids in an organic solvent (in particular aqueous).
- a plasma source as a source of cleaning the organic particles located at the bottom of the crack subsequently makes it possible to improve the adhesion of the electroconductive material serving for the electrode network.
- a cleaning using a plasma source at atmospheric pressure, blown plasma based on a mixture oxygen and helium allows both the improvement of the adhesion of the material deposited at the bottom of the interstices and the widening of the interstices. It is possible to use a plasma source of "ATOMFLOW" brand marketed by the company Surfx.
- the electroconductive network of the composite electrode according to the invention is produced.
- a metal it is preferable to choose silver or aluminum.
- conductive oxides it is preferable to choose ITO, IZO, IGZO.
- the average width of the conductive strands A is substantially equal to Al.
- the average distance between the conductive strands B is substantially equal to B1.
- the glass covered (optionally) with the adhesion promoting sublayer and the magnetron sputtering silver grid constitutes the cathode of the experimental device; the anode consists of a copper plate. Its role in dissolving, to maintain constant throughout the deposition process concentration of Cu 2+ ions and thus the deposition rate.
- the deposition conditions are: voltage ⁇ . 1.5 V and current ⁇ . 1 A.
- the anode and the cathode spaced 3 to 5 cm and of the same size, are positioned parallel to obtain lines of perpendicular fields.
- the copper layers are homogeneous on the silver grids.
- the thickness of the deposit increases with the duration of the electrolysis and the current density as well as the morphology of the deposit. The results are reported in the table below.
- a "lift off” operation is carried out.
- the colloidal mask is immersed in a solution containing water and acetone (the cleaning solution is chosen according to the nature of the colloidal particles) and then rinsed so as to remove all the parts coated with colloids.
- the space between the conductive strands is completely filled by a given material, preferably favoring the extraction of the guided modes in the OLED layers (high index, diffusing, etc.) and being electroconductive, and the coverage of the network and filler material by an electroconductive coating to complete the smoothing and having an electrical role of current distribution or maintaining a vertical conductivity.
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Abstract
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Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
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EP08855786A EP2220699A2 (fr) | 2007-11-22 | 2008-11-21 | Substrat porteur d'une electrode, dispositif electroluminescent organique l'incorporant, et sa fabrication |
JP2010534528A JP5547645B2 (ja) | 2007-11-22 | 2008-11-21 | 電極を支持している基材、該基材を含む有機エレクトロルミネセントデバイス及びその製造 |
US12/744,191 US8362686B2 (en) | 2007-11-22 | 2008-11-21 | Substrate bearing an electrode, organic light-emitting device incorporating it, and its manufacture |
CN200880125381.9A CN101926019B (zh) | 2007-11-22 | 2008-11-21 | 具有电极的基材、与其结合的有机发光装置、及其制造 |
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FR0759235A FR2924274B1 (fr) | 2007-11-22 | 2007-11-22 | Substrat porteur d'une electrode, dispositif electroluminescent organique l'incorporant, et sa fabrication |
FR0759235 | 2007-11-22 |
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WO2009071821A2 true WO2009071821A2 (fr) | 2009-06-11 |
WO2009071821A3 WO2009071821A3 (fr) | 2009-08-13 |
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PCT/FR2008/052108 WO2009071821A2 (fr) | 2007-11-22 | 2008-11-21 | Substrat porteur d'une electrode, dispositif electroluminescent organique l'incorporant, et sa fabrication |
PCT/FR2008/052109 WO2009071822A2 (fr) | 2007-11-22 | 2008-11-21 | Substrat porteur d'une electrode, dispositif electroluminescent organique l'incorporant, et sa fabrication |
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PCT/FR2008/052109 WO2009071822A2 (fr) | 2007-11-22 | 2008-11-21 | Substrat porteur d'une electrode, dispositif electroluminescent organique l'incorporant, et sa fabrication |
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US (2) | US8593055B2 (fr) |
EP (2) | EP2220699A2 (fr) |
JP (3) | JP5547645B2 (fr) |
KR (2) | KR20100106412A (fr) |
CN (3) | CN101926018A (fr) |
FR (1) | FR2924274B1 (fr) |
TW (2) | TWI496170B (fr) |
WO (2) | WO2009071821A2 (fr) |
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US20130032202A1 (en) * | 2010-01-11 | 2013-02-07 | Saint-Gobain Glass France | Photocatalytic material and glass sheet or photovoltaic cell including said material |
WO2012045949A1 (fr) | 2010-09-27 | 2012-04-12 | Saint-Gobain Glass France | Procede de connexion(s) electrique(s) d'un dispositif a diode electroluminescente organique encapsule et un tel dispositif oled |
CN103155194A (zh) * | 2010-10-07 | 2013-06-12 | 株式会社Lg化学 | 有机电子器件用衬底及其制造方法 |
US9448339B2 (en) | 2010-10-07 | 2016-09-20 | Lg Display Co., Ltd. | Substrate for an organic electronic element and a production method therefor |
WO2015092222A1 (fr) | 2013-12-17 | 2015-06-25 | Saint-Gobain Glass France | Support extracteur de lumière et dispositif oled l'incorporant |
WO2015155481A1 (fr) | 2014-04-09 | 2015-10-15 | Saint-Gobain Glass France | Support extracteur de lumière et dispositif oled l'incorporant |
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TWI746237B (zh) * | 2020-10-30 | 2021-11-11 | 啟耀光電股份有限公司 | 透光顯示模組的製造方法 |
Also Published As
Publication number | Publication date |
---|---|
KR101556423B1 (ko) | 2015-10-01 |
WO2009071822A3 (fr) | 2009-08-13 |
JP2011504639A (ja) | 2011-02-10 |
WO2009071822A2 (fr) | 2009-06-11 |
WO2009071821A3 (fr) | 2009-08-13 |
JP5547645B2 (ja) | 2014-07-16 |
JP2015149293A (ja) | 2015-08-20 |
JP2011504640A (ja) | 2011-02-10 |
CN101926018A (zh) | 2010-12-22 |
US8593055B2 (en) | 2013-11-26 |
EP2220700A2 (fr) | 2010-08-25 |
FR2924274B1 (fr) | 2012-11-30 |
KR20100106413A (ko) | 2010-10-01 |
US20110001153A1 (en) | 2011-01-06 |
KR20100106412A (ko) | 2010-10-01 |
FR2924274A1 (fr) | 2009-05-29 |
CN101926019B (zh) | 2014-04-09 |
TW200947783A (en) | 2009-11-16 |
CN105140415A (zh) | 2015-12-09 |
US20110001420A1 (en) | 2011-01-06 |
TW200949863A (en) | 2009-12-01 |
EP2220699A2 (fr) | 2010-08-25 |
US8362686B2 (en) | 2013-01-29 |
TWI496170B (zh) | 2015-08-11 |
CN101926019A (zh) | 2010-12-22 |
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