WO2014054255A1 - Matière organique pour la formation de film et élément de conversion photoélectrique organique obtenu en l'utilisant, élément de capture d'image, procédé de formation de film et procédé de fabrication d'élément de conversion photoélectrique organique - Google Patents
Matière organique pour la formation de film et élément de conversion photoélectrique organique obtenu en l'utilisant, élément de capture d'image, procédé de formation de film et procédé de fabrication d'élément de conversion photoélectrique organique Download PDFInfo
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- WO2014054255A1 WO2014054255A1 PCT/JP2013/005763 JP2013005763W WO2014054255A1 WO 2014054255 A1 WO2014054255 A1 WO 2014054255A1 JP 2013005763 W JP2013005763 W JP 2013005763W WO 2014054255 A1 WO2014054255 A1 WO 2014054255A1
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- WIPO (PCT)
- Prior art keywords
- organic
- photoelectric conversion
- layer
- film formation
- ring
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Images
Classifications
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09B—ORGANIC DYES OR CLOSELY-RELATED COMPOUNDS FOR PRODUCING DYES, e.g. PIGMENTS; MORDANTS; LAKES
- C09B23/00—Methine or polymethine dyes, e.g. cyanine dyes
- C09B23/02—Methine or polymethine dyes, e.g. cyanine dyes the polymethine chain containing an odd number of >CH- or >C[alkyl]- groups
- C09B23/04—Methine or polymethine dyes, e.g. cyanine dyes the polymethine chain containing an odd number of >CH- or >C[alkyl]- groups one >CH- group, e.g. cyanines, isocyanines, pseudocyanines
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09B—ORGANIC DYES OR CLOSELY-RELATED COMPOUNDS FOR PRODUCING DYES, e.g. PIGMENTS; MORDANTS; LAKES
- C09B23/00—Methine or polymethine dyes, e.g. cyanine dyes
- C09B23/10—The polymethine chain containing an even number of >CH- groups
- C09B23/105—The polymethine chain containing an even number of >CH- groups two >CH- groups
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09B—ORGANIC DYES OR CLOSELY-RELATED COMPOUNDS FOR PRODUCING DYES, e.g. PIGMENTS; MORDANTS; LAKES
- C09B47/00—Porphines; Azaporphines
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09B—ORGANIC DYES OR CLOSELY-RELATED COMPOUNDS FOR PRODUCING DYES, e.g. PIGMENTS; MORDANTS; LAKES
- C09B47/00—Porphines; Azaporphines
- C09B47/04—Phthalocyanines abbreviation: Pc
- C09B47/045—Special non-pigmentary uses, e.g. catalyst, photosensitisers of phthalocyanine dyes or pigments
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09B—ORGANIC DYES OR CLOSELY-RELATED COMPOUNDS FOR PRODUCING DYES, e.g. PIGMENTS; MORDANTS; LAKES
- C09B48/00—Quinacridones
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- C—CHEMISTRY; METALLURGY
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- C09B—ORGANIC DYES OR CLOSELY-RELATED COMPOUNDS FOR PRODUCING DYES, e.g. PIGMENTS; MORDANTS; LAKES
- C09B57/00—Other synthetic dyes of known constitution
- C09B57/004—Diketopyrrolopyrrole dyes
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- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09B—ORGANIC DYES OR CLOSELY-RELATED COMPOUNDS FOR PRODUCING DYES, e.g. PIGMENTS; MORDANTS; LAKES
- C09B57/00—Other synthetic dyes of known constitution
- C09B57/008—Triarylamine dyes containing no other chromophores
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- H—ELECTRICITY
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- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K71/00—Manufacture or treatment specially adapted for the organic devices covered by this subclass
- H10K71/10—Deposition of organic active material
- H10K71/16—Deposition of organic active material using physical vapour deposition [PVD], e.g. vacuum deposition or sputtering
- H10K71/164—Deposition of organic active material using physical vapour deposition [PVD], e.g. vacuum deposition or sputtering using vacuum deposition
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- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K71/00—Manufacture or treatment specially adapted for the organic devices covered by this subclass
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- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K85/00—Organic materials used in the body or electrodes of devices covered by this subclass
- H10K85/60—Organic compounds having low molecular weight
- H10K85/615—Polycyclic condensed aromatic hydrocarbons, e.g. anthracene
- H10K85/621—Aromatic anhydride or imide compounds, e.g. perylene tetra-carboxylic dianhydride or perylene tetracarboxylic di-imide
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- H—ELECTRICITY
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- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K85/00—Organic materials used in the body or electrodes of devices covered by this subclass
- H10K85/60—Organic compounds having low molecular weight
- H10K85/631—Amine compounds having at least two aryl rest on at least one amine-nitrogen atom, e.g. triphenylamine
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- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K30/00—Organic devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation
- H10K30/20—Organic devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation comprising organic-organic junctions, e.g. donor-acceptor junctions
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- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K39/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic radiation-sensitive element covered by group H10K30/00
- H10K39/30—Devices controlled by radiation
- H10K39/32—Organic image sensors
Definitions
- the present invention relates to an organic material for film formation used for dry film formation of an organic photoelectric conversion element, and an organic photoelectric conversion element, an image pickup element, and an organic electroluminescence element obtained using the same.
- the present invention also relates to a method for forming an organic layer constituting the organic photoelectric conversion element and a method for manufacturing the organic photoelectric conversion element.
- organic photoelectric conversion film with features that can be manufactured by printing process and organic photoelectric conversion element equipped with it is an image sensor (imaging element) used for digital cameras etc.
- image sensor imaging element
- organic electroluminescent elements organic EL
- organic thin film solar cells organic thin film transistors used for electronic paper, and the like.
- the organic imaging device is expected because a high aperture ratio can be obtained compared to a conventional photoelectric conversion site in which a photodiode portion using a PN junction is formed in a semiconductor such as Si. It is growing.
- Organic thin-film solar cells are widely studied due to the advantages of easy manufacturing process and large area at low cost compared to inorganic solar cells typified by silicon, but low energy conversion efficiency. It has not yet reached a practical level.
- Organic electroluminescence (EL) elements are attracting attention as display elements and light-emitting elements because they can emit light with high luminance at a low voltage.
- Organic EL elements can be greatly reduced in power consumption, easily reduced in size, and increased in area, and research into practical use has been actively conducted as next-generation display elements and light-emitting elements.
- the present applicant has repeatedly studied an organic photoelectric conversion element including an organic layer in a light-receiving layer or a light-emitting layer, and an imaging element, an optical sensor, a solar cell, and an organic electroluminescence element including the organic photoelectric conversion element.
- an organic photoelectric conversion element including an organic layer in a light-receiving layer or a light-emitting layer, and an imaging element, an optical sensor, a solar cell, and an organic electroluminescence element including the organic photoelectric conversion element.
- exciton dissociation efficiency in the light receiving layer is good and charge transportability is good.
- optical sensors such as an image pick-up element
- the carrier amount in the dark can be controlled.
- the applicant of the present invention has a mixed layer of a p-type organic semiconductor and fullerene or a fullerene derivative (a bulk heterostructure in which two materials are co-evaporated).
- An organic photoelectric conversion element using a layer) has been filed (Patent Document 1).
- an organic photoelectric conversion element having high photoelectric conversion efficiency and a good S / N ratio of photocurrent / dark current can be provided.
- mainly dry film formation such as vapor deposition is preferably used.
- film formation is performed using a film formation material containing a constituent material such as a vapor deposition source or a sputtering target, and it is preferable to use a material having high purity as the film formation material.
- the purity of the film forming material is generally evaluated by high performance liquid chromatography (HPLC). Therefore, it is common to use a film-forming material having an HPLC purity close to 100%.
- HPLC high performance liquid chromatography
- the present inventors have formed a film having an HPLC purity of 95% or more.
- the light-receiving layer is formed using the material for use.
- the present inventor has confirmed the phenomenon that pixel defects vary even when organic materials for film formation having the same HPLC purity are used. This phenomenon is confirmed in the same manner even when a film-forming organic material having an HPLC purity of 100% is used.
- a pixel defect is a defect that causes a decrease in sensitivity of several pixels called white scratches or black scratches in a photoelectric conversion element used in an optical sensor such as an image sensor, and is a substance (foreign matter) that can be a defect in the light receiving layer. ) Is thought to be the cause. If a foreign substance larger than the pixel is mixed, it becomes a defect extending to a plurality of pixels, and correction is impossible. In particular, the influence is great in optical sensor applications in which the length of the long side of one pixel is 5 ⁇ m or less, such as an image sensor.
- the present invention has been made in view of the above circumstances, and in the production of an organic photoelectric conversion element used in an optical sensor, stably forming a light-receiving layer with little mixing of substances that can cause pixel defects, and
- An object of the present invention is to provide an organic material for film formation that makes it possible.
- Another object of the present invention is to stably produce an organic photoelectric conversion element with few pixel defects in an organic photoelectric conversion element used in an optical sensor.
- the present inventor causes the presence of metals and halogen elements that are considered to be negligible in terms of HPLC purity.
- the metal content is preferably less than 10 ppm
- the halogen element is preferably less than 100 ppm.
- the inventors have found that substances that adversely affect pixel defects are mixed in, and the present invention has been completed.
- the organic material for film formation of the present invention is used for dry film formation of a light receiving layer of an organic photoelectric conversion element used in an optical sensor, and is a film forming organic material mainly composed of organic substances constituting the light receiving layer. , Containing less than 1.0% by mass of a substance that cannot be detected by high performance liquid chromatography (hereinafter referred to as HPLC).
- HPLC high performance liquid chromatography
- the light-receiving layer film forming method of the present invention is a method for forming a light-receiving layer of an organic photoelectric conversion element used for an optical sensor by a dry film forming method, and the light-receiving layer is composed mainly of organic substances and measured by HPLC.
- Such a method is preferably used for forming a light receiving layer in a method of manufacturing an organic photoelectric conversion element having a pair of electrodes and a light receiving layer or a light emitting layer including at least a photoelectric conversion layer sandwiched between the pair of electrodes. it can.
- the “constituent organic substance” means all organic substances excluding inevitable impurities and substances unintentionally contained in the organic material for film formation among the organic substances contained in the organic material for film formation. To do.
- “substances that cannot be detected by HPLC measurement” means substances that remain on the filter after the filtration operation after being completely dissolved (judged by visual inspection) in the solvent used for HPLC detection. To do.
- the content of a substance that cannot be detected by HPLC measurement is obtained by filtering a solution obtained by completely dissolving (determining visually) an organic material for film formation into a solvent using a membrane filter having a pore size of 1 ⁇ m or less. The value calculated from the mass of the substance remaining on the top.
- the “purity of the organic material for film formation” means that the organic material for film formation is dissolved in a solvent and is suitable for HPLC using a UV / VIS (190 nm to 900 nm) detector. The absorbance is monitored by wavelength, and the peak area ratio of the main component of the constituent organic matter is obtained.
- substances that cannot be detected by HPLC are substances generated by the reaction of constituent organic substances and / or metals, intermediates generated in the manufacturing process of constituent organic substances, and The aspect which consists of at least 1 of the substance produced
- the present invention can be suitably used for forming a light receiving layer of an optical sensor in which the length of the longer side of one pixel is 5 ⁇ m or less.
- the content of a substance that cannot be detected by HPLC is preferably 0.8% by mass or less, and more preferably 0.5% by mass or less.
- the present invention is suitable when the substance that cannot be detected by HPLC has a higher sublimation temperature than the constituent organic substances.
- the sublimation temperature is higher than that of the constituent organic substances means that the sublimation pressure at a vacuum degree of 1 ⁇ 10 ⁇ 3 Pa or less is higher than the sublimation pressure of the constituent organic substances.
- the amount of each metal not contained in the constituent organic matter is preferably less than 10 ppm.
- the amount of residual solvent in the organic material for film formation is preferably 3 mol% or less.
- suitable organic materials include fullerene or fullerene derivatives.
- a vacuum resistance heating vapor deposition method may be mentioned.
- Examples of the light receiving layer include a photoelectric conversion layer, an electron blocking layer, and a hole blocking layer, and the present invention is particularly suitable for forming a photoelectric conversion layer and an electron blocking layer.
- the organic photoelectric conversion element of the present invention is an organic photoelectric conversion element having a pair of electrodes and a light receiving layer including at least the photoelectric conversion layer sandwiched between the pair of electrodes, at least one of the pair of electrodes being a transparent electrode
- the light-receiving layer includes a layer formed by dry film formation using the film-forming organic material of the present invention.
- a device including a plurality of organic photoelectric conversion elements and a circuit board on which a signal reading circuit that reads a signal corresponding to the electric charge generated in the photoelectric conversion layer of the photoelectric conversion element is formed is suitable as an optical sensor or an imaging element.
- the organic material for film formation according to the present invention is an organic material for film formation mainly composed of organic substances constituting the light receiving layer of an organic photoelectric conversion element used in an optical sensor, and has a high purity as evaluated by HPLC. Inclusion of substances remaining in organic materials and produced by reaction of constituent organic substances and / or metals, intermediates produced in the production process of constituent organic substances, and substances produced by reaction of these intermediates The amount is less than 1.0% by mass.
- Schematic perspective view (vacuum heating vapor deposition) showing vapor deposition method of light receiving layer 1 is a schematic cross-sectional schematic diagram illustrating an embodiment of an image sensor according to the present invention.
- FIG. 1 is a schematic cross-sectional view showing the configuration of the photoelectric conversion element of this embodiment.
- the scale of each part is appropriately changed and shown for easy visual recognition.
- the organic photoelectric conversion element 1 (photoelectric conversion element 1) includes a substrate 10, a lower electrode 20 formed on the substrate 10, an electron blocking layer 31 formed on the lower electrode 20, and , An organic photoelectric conversion layer (hereinafter referred to as a photoelectric conversion layer) 32 formed on the electron blocking layer 31, an electrode 40 formed on the photoelectric conversion layer 32, and a sealing layer 50 formed on the electrode 40.
- a light receiving layer 30 is formed by the electron blocking layer 31 and the photoelectric conversion layer 32.
- the light receiving layer 30 may be a layer including at least the photoelectric conversion layer 32, and may be a layer including a layer other than the electron blocking layer 31 (for example, a hole blocking layer).
- the electron blocking layer 31 included in the light receiving layer 30 suppresses the injection of electrons from the lower electrode 20 into the photoelectric conversion layer 32 and inhibits the electrons generated in the photoelectric conversion layer 32 from flowing to the electrode 20 side.
- the electron blocking layer 31 includes an organic material, an inorganic material, or both.
- the electrode 40 is an electrode that collects electrons out of charges generated in the photoelectric conversion layer 32.
- the electrode 40 is made of a conductive material (for example, ITO) that is sufficiently transparent to light having a wavelength with which the photoelectric conversion layer 32 has sensitivity in order to cause light to enter the photoelectric conversion layer 32.
- ITO a conductive material
- the photoelectric conversion element 1 configured as described above uses the upper electrode 40 as a light incident side electrode, and when light is incident from above the upper electrode 40, this light is transmitted through the upper electrode 40 and incident on the photoelectric conversion layer 32. Here, charges are generated. Holes in the generated charges move to the lower electrode 20. By converting the holes transferred to the lower electrode 20 into a voltage signal corresponding to the amount of the holes and reading out the light, the light can be converted into a voltage signal and extracted.
- a bias voltage may be applied so as to collect electrons at the electrode 20 and collect holes at the electrode 40.
- a hole blocking layer may be provided instead of the electron blocking layer 31.
- the hole blocking layer suppresses injection of holes from the electrode 20 into the photoelectric conversion layer 32, and an organic material for inhibiting holes generated in the photoelectric conversion layer 32 from flowing toward the electrode 20 side. It may be a layer composed of In either case, the portion sandwiched between the electrode 20 and the electrode 40 becomes the light receiving layer 30.
- the light receiving layer 30 including the photoelectric conversion layer 32 is a layer (organic layer) including an organic material, and is an organic film formed by a dry film forming method using the film forming organic material 60. Including layers.
- the dry film forming method is not particularly limited, and examples thereof include physical vapor deposition, sputtering, chemical vapor deposition, and the like, but vacuum resistance vapor deposition can be preferably used.
- FIG. 2 shows an example of a schematic diagram showing a state of film formation by vacuum resistance heating vapor deposition.
- the light-receiving layer is normally vapor-deposited with a substrate holder 90 provided above the opening of the vapor deposition cell 71 installed in the vapor deposition chamber 91, and with the substrate B installed in the holder 90.
- a film-forming organic material (vapor deposition material) 60 is installed in the vapor deposition cell 71 having a heating function, and since the inside of the vapor deposition chamber 91 has a high degree of vacuum, the vapor deposition material evaporated from the vapor deposition cell 71 has an opening portion. The film is emitted from the substrate and travels straight and is formed on the substrate B.
- the maximum emission angle ⁇ of the evaporated vapor deposition material can be adjusted.
- the deposition cell 71 and the substrate B are separated by 10 cm or more if possible.
- the evaporated deposition material is incident on the substrate surface while spreading in a substantially conical shape at an incident angle of 0 ° to ⁇ .
- the organic material 60 for film formation is installed in a vapor deposition source such as a boat type, a basket type, a hairpin type, or a crucible type, and is not particularly limited.
- the film-forming organic material 60 a high-purity film-forming organic material having a HPLC purity of 95% or more, preferably 98% or more is usually used.
- the high-purity organic material for film-forming shall mean the organic material for film-forming whose HPLC purity is 95% or more.
- the present inventor has investigated the cause of variation in the amount of substances that can cause pixel defects mixed in the light-receiving layer even when the light-receiving layer is formed using a high-purity organic material for film formation. Went.
- the organic material for film formation includes, in addition to inevitable impurities, substances generated by reactions such as decomposition and polymerization of constituent organic substances and / or metals, intermediates produced in the manufacturing process of constituent organic substances, and intermediates thereof.
- the present inventor found that even if such a substance is a substance having a sublimation temperature higher than that of the constituent organic substance, the substance is entrained and sublimated during sublimation of the constituent organic substance. I think that will cause.
- fullerenes when amorphous carbon formed by polymerization of fullerenes is contained, amorphous carbon is used for HPLC measurement. Since some materials are hardly soluble in the solvent to be used and cannot be detected by HPLC, even if the material is contained in several percent or more, it is used as a high-purity organic material for film formation without being removed as it is. Further, although the sublimation temperature of amorphous carbon is higher than that of fullerenes, the present inventor believes that it is likely to cause pixel defects because it is easily caught in fullerenes during sublimation of fullerenes.
- the high-purity organic material for film formation is further refined, and the content of foreign matter causing pixel defects is less than 1.0% by mass, preferably 0.8% by mass or less, more preferably 0%. It was found that a light-receiving layer having few pixel defects can be stably formed by forming a light-receiving layer after carrying out a step (purification step) of 0.5 mass% or less.
- the dry film formation of the light receiving layer 30 of the organic photoelectric conversion element 1 has a constituent organic substance of the light receiving layer 30 as a main component, a purity measured by HPLC of 98% or more, and a metal content of 10 ppm or less.
- Preparing a high-purity organic material for film formation (A), From this high-purity organic material for film formation, a foreign substance that causes pixel defects that cannot be detected by HPLC measurement, and the content of the foreign material in the organic material for film formation is less than 1.0% by mass (B )When, This is performed by a method including a film forming step (C) in which the light receiving layer 30 is formed by a dry film forming method using the organic material 60 for film formation after the purification step (B).
- the method for removing foreign substances that cause pixel defects is not particularly limited.
- a high-purity organic material for film formation is completely dissolved in a solvent in which decomposition of the material is not accelerated during melting, and a membrane having a pore size of 0.1 ⁇ m to 1 ⁇ m.
- Foreign matters can be removed by suction filtration with a filter and removing the solvent by concentrating the filtrate under reduced pressure.
- the solvent used in the HPLC detection is appropriately changed depending on the constituent organic substances, and the type thereof is not limited. Two or more kinds of solvents may be mixed.
- Examples include tetrachloromethane, dichlorobenzene, dichloroethane, trichlorobenzene, hexafluoroisopropanol, DMI, N-methylpyrrolidone, N-ethylpyrrolidone, water, or a mixture of two or more of these, but limited to the above solvents Not.
- the organic material for high-purity film formation may contain a solvent that remains undetectable by HPLC. Since this solvent affects characteristics such as photoelectric conversion efficiency, photocurrent / dark current S / N ratio, and response speed, a solvent removal step of 3 mol% or less of residual solvent is performed in the purification step. It is preferable to do.
- the mechanism by which the residual solvent affects these properties is not clear, but the present inventor has shown that the residual solvent, which is slightly contained, increases the thermal load because decomposition is accelerated by the thermal load or over time.
- the residual solvent reacts with the organic substance, the organic substance has an adverse effect such as partial decomposition, and the organic substance is sublimated to form a film, so that deterioration of the film characteristics is observed over time. I guess.
- the remaining solvent that cannot be detected by HPLC is 3 mol% or less, so that a photoelectric conversion element with a fast response speed can be stabilized while maintaining good photoelectric conversion efficiency and S / N ratio. Can be manufactured.
- the type of residual solvent is not limited, although the amount of influence is large or small.
- the solvent include water, alcohols, ethers, ketones, sulfoxides, carbonates, amides, carboxylic acids, esters, nitriles, halogens, aromatics and the like. More specifically, when two or more types of solvents are contained, the total content of the two or more types is preferably 3 mol% or less.
- solvents that may remain include methanol, ethanol, propanol, isopropanol, butanol, isobutanol, t-butyl alcohol, ethylene glycol, propylene glycol, glycerin, dimethyl ether, diethyl ether, 1,2-dimethoxyethane.
- the removal method of the residual solvent is not particularly limited in the method of performing the solvent removal step, but sublimation purification, recrystallization purification, column chromatography purification, reslurry, vacuum drying method, reprecipitation purification, liquid separation, water, solvent washing, filtration Filtering, ion exchange resin chromatography, activated carbon, diatomaceous earth, ion exchange resin, resin, adsorption with inorganic porous material (zeolite), air drying, heat drying method, freeze drying and the like.
- the step (A) includes a metal removal step so that the metal content is less than 10 ppm. It is preferable. It is preferable that the organic material 60 for film formation does not contain any metal such as Al, Fe, Cu, Zn, Zr, Ca, Mg, Cr, Ni, Mo, Mn, Na, Si, B, and K. It is preferable that halogen elements such as F, Cl, Br, and I are not included. In the step (A), it is more preferable to include a step of setting the halogen element content to less than 100 ppm. The metal removal step and the halogen element removal step may be performed in the purification step of step (B).
- a metal removal step or a purification step may be performed using a high-purity film-forming organic material obtained by a normal synthesis method, or in the purification step during synthesis. You may implement the refinement
- the film formation step (C) is performed using the organic material for film formation 60 by a predetermined dry film formation method. Then, the light receiving layer 30 (electron blocking layer 31 and photoelectric conversion layer 32) is formed.
- the formed organic material 60 is formed into a specific shape by pressurization, a sintered body obtained by firing and sintering, or a granule.
- the solvent removal step may be carried out after molding, granulating and sintering.
- the film formation speed is preferably 0.2 to 12 cm / s from the viewpoint of productivity.
- the film formation temperature may be any temperature that falls within the range of the film formation rate (evaporation rate), and is preferably in the range of 350 to 750 ° C.
- the relative sensitivity and the organic material 60 for film formation are used in the photoelectric conversion layer 32 and the electron blocking layer 31 constituting the light receiving layer 30.
- the result of evaluating the number of CMOS defective pixels is shown, it can be preferably applied to a hole blocking layer (not shown).
- the film-forming organic material 60 is mainly composed of the constituent organic matter of the light-receiving layer 30 of the organic photoelectric conversion element 1 used in the optical sensor, and is a film-forming organic material that is highly purified by HPLC evaluation. And the content of the substance produced by the reaction of the constituent organic substance and / or metal, the intermediate produced in the production process of the constituent organic substance, and the substance produced by the reaction of this intermediate Less than 0.0% by mass.
- the configuration of the photoelectric conversion element 1 shown in FIG. 1 will be described.
- the light receiving layer 30 such as the photoelectric conversion layer 32 and the electron blocking layer 31 which are organic layers is formed by the dry film formation method using the organic material 60 for film formation described above.
- the photoelectric conversion element 1 with few pixel defects can be manufactured stably.
- Substrate and electrode> There is no restriction
- the lower electrode 20 is an electrode for collecting holes out of charges generated in the photoelectric conversion layer 32.
- the lower electrode 20 is not particularly limited as long as it has good conductivity. However, depending on the application, there are cases where transparency is provided, and conversely, a case where a material that does not have transparency and reflects light is used. is there.
- conductive metal oxides such as tin oxide (ATO, FTO) doped with antimony or fluorine, tin oxide, zinc oxide, indium oxide, indium tin oxide (ITO), indium zinc oxide (IZO), Metals such as gold, silver, chromium, nickel, titanium, tungsten, and aluminum, and conductive compounds such as oxides and nitrides of these metals (for example, titanium nitride (TiN)), and these metals and conductivity Examples include mixtures or laminates with metal oxides, inorganic conductive materials such as copper iodide and copper sulfide, organic conductive materials such as polyaniline, polythiophene, and polypyrrole, and laminates of these with ITO or titanium nitride. .
- ATO tin oxide
- FTO tin oxide
- ITO indium tin oxide
- IZO indium zinc oxide
- Metals such as gold, silver, chromium, nickel, titanium, tungsten
- the upper electrode 40 is an electrode that collects electrons out of the charges generated in the photoelectric conversion layer 32.
- the upper electrode 40 is not particularly limited as long as it is a conductive material that is sufficiently transparent to light having a wavelength with which the photoelectric conversion layer 32 has sensitivity in order to allow light to enter the photoelectric conversion layer 32.
- conductive metal oxides such as tin oxide (ATO, FTO) doped with antimony or fluorine, tin oxide, zinc oxide, indium oxide, indium tin oxide (ITO), indium zinc oxide (IZO), Metal thin films such as gold, silver, chromium and nickel, and mixtures or laminates of these metals and conductive metal oxides, inorganic conductive materials such as copper iodide and copper sulfide, organic materials such as polyaniline, polythiophene and polypyrrole Examples thereof include conductive materials and laminates of these with ITO. Among these, conductive metal oxides are preferable from the viewpoint of high conductivity and transparency.
- the method for forming the electrode is not particularly limited, and can be appropriately selected in consideration of appropriateness with the electrode material. Specifically, it can be formed by a wet method such as a printing method or a coating method, a physical method such as a vacuum deposition method, a sputtering method, or an ion plating method, or a chemical method such as CVD or plasma CVD method.
- the electrode material When the electrode material is ITO, it can be formed by a method such as an electron beam method, a sputtering method, a resistance heating vapor deposition method, a chemical reaction method (sol-gel method or the like), or a dispersion of indium tin oxide. Furthermore, UV-ozone treatment, plasma treatment, or the like can be performed on a film formed using ITO. When the electrode material is TiN, various methods including a reactive sputtering method can be used, and further, UV-ozone treatment, plasma treatment, and the like can be performed.
- the upper electrode 40 is formed on the organic photoelectric conversion layer 32, it is preferable that the upper electrode 40 be formed by a method that does not deteriorate the characteristics of the organic photoelectric conversion layer 32. Therefore, the upper electrode 40 is preferably formed plasma-free.
- plasma free means that no plasma is generated during the deposition of the upper electrode 40, or that the distance from the plasma generation source to the substrate is 2 cm or more, preferably 10 cm or more, more preferably 20 cm or more. It means a state in which the plasma that reaches is reduced.
- Examples of apparatuses that do not generate plasma during the formation of the upper electrode 40 include an electron beam vapor deposition apparatus (EB vapor deposition apparatus) and a pulse laser vapor deposition apparatus.
- EB deposition equipment or pulse laser deposition equipment “Surveillance of Transparent Conductive Films” supervised by Yutaka Sawada (published by CMC, 1999), “New Development of Transparent Conductive Films II” supervised by Yutaka Sawada (published by CMC, 2002) ), “Transparent conductive film technology” by the Japan Society for the Promotion of Science (Ohm Co., 1999), and the references attached thereto, etc. can be used.
- an EB vapor deposition method a method of forming a transparent electrode film using an EB vapor deposition apparatus is referred to as an EB vapor deposition method
- a method of forming a transparent electrode film using a pulse laser vapor deposition apparatus is referred to as a pulse laser vapor deposition method.
- a plasma-free film forming apparatus For an apparatus that can realize a state in which the distance from the plasma generation source to the substrate is 2 cm or more and the arrival of plasma to the substrate is reduced (hereinafter referred to as a plasma-free film forming apparatus), for example, an opposed target sputtering Equipment, arc plasma deposition, etc. are considered, and these are supervised by Yutaka Sawada "New development of transparent conductive film” (published by CMC, 1999), and supervised by Yutaka Sawada "New development of transparent conductive film II” (published by CMC) 2002), “Transparent conductive film technology” (Ohm Co., 1999) by the Japan Society for the Promotion of Science, and references and the like attached thereto can be used.
- a transparent conductive film such as TCO When a transparent conductive film such as TCO is used as the upper electrode 40, a DC short circuit or an increase in leakage current may occur.
- TCO transparent conductive film
- One reason for this is thought to be that fine cracks introduced into the photoelectric conversion layer 32 are covered with a dense film such as TCO, and conduction between the lower electrode 20 on the opposite side is increased. For this reason, in the case of an electrode having a poor film quality such as Al, an increase in leakage current hardly occurs.
- the film thickness of the upper electrode 40 is 1/5 or less, preferably 1/10 or less of the thickness of the photoelectric conversion layer 32.
- the sheet resistance is preferably 100 to 10,000 ⁇ / ⁇ .
- the degree of freedom in the range of film thickness that can be made thin is great.
- the increase in light transmittance is very preferable because it increases the light absorption in the photoelectric conversion layer 32 and increases the photoelectric conversion ability.
- the thickness of the upper electrode 40 is preferably 5 to 100 nm, and more preferably 5 to 20 nm. preferable.
- the light receiving layer 30 is an organic layer including at least the photoelectric conversion layer 32, and includes an organic layer formed by a dry film forming method using the film forming organic material 60.
- the light receiving layer 30 includes an electron blocking layer 31 and a photoelectric conversion layer 32, and either or both of these are formed by a dry film forming method using the film forming organic material 60. ing.
- the light receiving layer 30 can be formed by a dry film forming method or a wet film forming method.
- the dry film formation method is preferable in that a uniform film formation is easy and impurities are not easily mixed, and that film thickness control and lamination on different materials are easy.
- the dry film forming method include a vacuum vapor deposition method, a sputtering method, an ion plating method, a physical vapor deposition method such as an MBE method, or a CVD method such as plasma polymerization.
- a vacuum deposition method is preferred, and in the case of forming a film by the vacuum deposition method, the production conditions such as the degree of vacuum and the deposition temperature can be set according to conventional methods.
- the decomposition temperature is higher than the vapor deposition possible temperature because thermal decomposition during vapor deposition can be suppressed.
- the degree of vacuum at the time of formation is preferably 1 ⁇ 10 ⁇ 3 Pa or less in consideration of preventing deterioration of element characteristics at the time of forming the light receiving layer. ⁇ 4 Pa or less is more preferable, and 1 ⁇ 10 ⁇ 4 Pa or less is particularly preferable.
- the thickness of the light receiving layer 30 is preferably 10 nm or more and 1000 nm or less, more preferably 50 nm or more and 800 nm or less, and particularly preferably 100 nm or more and 600 nm or less. By setting it to 10 nm or more, a suitable dark current suppressing effect is obtained, and by setting it to 1000 nm or less, suitable photoelectric conversion efficiency is obtained.
- the photoelectric conversion layer 32 receives light and generates an electric charge according to the amount of light, and includes an organic photoelectric conversion material.
- the photoelectric conversion element 1 of the present embodiment has a configuration in which a photoelectric conversion layer 32 includes a mixed layer (bulk hetero layer) in which a p-type organic semiconductor (p-type organic compound) and an n-type organic semiconductor are mixed.
- This mixed layer is preferably formed by co-evaporation of the organic material 60 for forming a p-type organic semiconductor material and the organic material 60 for forming an n-type organic semiconductor material.
- the mixed layer refers to a layer in which a plurality of materials are mixed or dispersed.
- the mixed layer is a layer formed by co-evaporating a p-type organic semiconductor and an n-type organic semiconductor. .
- fullerene or a fullerene derivative is a fullerene or a fullerene derivative.
- the fullerene derivative means a compound having a substituent added thereto.
- the substituent for the fullerene derivative is preferably an alkyl group, an aryl group, or a heterocyclic group.
- the alkyl group is more preferably an alkyl group having 1 to 12 carbon atoms, and the aryl group and the heterocyclic group are preferably a benzene ring, naphthalene ring, anthracene ring, phenanthrene ring, fluorene ring, triphenylene ring, naphthacene ring.
- substituents may further have a substituent, and the substituents may be bonded as much as possible to form a ring.
- substituents may be bonded as much as possible to form a ring.
- you may have a some substituent and they may be the same or different.
- a plurality of substituents may be combined as much as possible to form a ring.
- the p-type organic semiconductor (compound) constituting the photoelectric conversion layer 32 preferably has an appropriate particle size that does not greatly affect the stability of the deposition rate.
- the average particle size of the p-type organic semiconductor and the n-type organic semiconductor is preferably 10 to 800 ⁇ m, and more preferably 20 to 700 ⁇ m.
- the p-type organic semiconductor (compound) constituting the photoelectric conversion layer 32 is a donor organic semiconductor (compound), which is mainly represented by a hole-transporting organic compound and refers to an organic compound having a property of easily donating electrons. . More specifically, an organic compound having a smaller ionization potential when two organic materials are used in contact with each other. Therefore, any organic compound can be used as the donor organic compound as long as it is an electron-donating organic compound.
- a metal complex having a ring compound as a ligand can be used.
- the present invention is not limited thereto, and any organic compound having an ionization potential smaller than that of the organic compound used as the n-type organic semiconductor may be used as the donor organic semiconductor.
- triarylamine compounds preferred are triarylamine compounds, pyran compounds, quinacridone compounds, pyrrole compounds, phthalocyanine compounds, merocyanine compounds, and condensed aromatic carbocyclic compounds.
- Any organic dye may be used as the p-type organic semiconductor, but preferred are cyanine dye, styryl dye, hemicyanine dye, merocyanine dye (including zero methine merocyanine (simple merocyanine)), trinuclear merocyanine dye, 4 Nuclear merocyanine dye, rhodacyanine dye, complex cyanine dye, complex merocyanine dye, allopolar dye, oxonol dye, hemioxonol dye, squalium dye, croconium dye, azamethine dye, coumarin dye, arylidene dye, anthraquinone dye, triphenylmethane dye, azo Dye, azomethine dye, spiro compound, metallocene dye, fluorenone dye, fulgide dye, perylene dye, perinone dye, phenazine dye, phenothiazine dye, quinone color , Diphenyl
- Fullerenes that constitute the photoelectric conversion layer 32 is not particularly limited, fullerene C 60, fullerene C 70, fullerene C 76, fullerene C 78, fullerene C 80, fullerene C 82, fullerene C 84, fullerene C 90, fullerene C 96, Examples include fullerene C 240 , fullerene 540 , mixed fullerene, and fullerene nanotubes. A typical fullerene skeleton is shown below.
- the fullerene derivative means a compound having a substituent added thereto.
- the substituent for the fullerene derivative is preferably an alkyl group, an aryl group, or a heterocyclic group.
- the alkyl group is more preferably an alkyl group having 1 to 12 carbon atoms, and the aryl group and the heterocyclic group are preferably a benzene ring, naphthalene ring, anthracene ring, phenanthrene ring, fluorene ring, triphenylene ring, naphthacene ring.
- substituents may further have a substituent, and the substituents may be bonded as much as possible to form a ring.
- substituents may be bonded as much as possible to form a ring.
- you may have a some substituent and they may be the same or different.
- a plurality of substituents may be combined as much as possible to form a ring.
- the photoelectric conversion layer 32 contains fullerene or a fullerene derivative
- charges generated by photoelectric conversion can be quickly transported to the lower electrode 20 or the upper electrode 40 via the fullerene molecule or fullerene derivative molecule.
- fullerene molecules or fullerene derivative molecules are connected to form an electron path, the electron transport property is improved, and the high-speed response of the organic photoelectric conversion element can be realized.
- the fullerene or fullerene derivative is preferably contained in the photoelectric conversion layer 32 by 40% or more.
- the p-type organic semiconductor is reduced, the junction interface is reduced, and the exciton dissociation efficiency is lowered.
- the triarylamine compound described in Japanese Patent No. 4213832 is used as a p-type organic semiconductor mixed with fullerene or a fullerene derivative in the photoelectric conversion layer 32, a high SN ratio of the organic photoelectric conversion element can be expressed. Is particularly preferred. If the ratio of fullerene or fullerene derivative in the photoelectric conversion layer 32 is too large, the amount of the triarylamine compound is reduced and the amount of incident light absorbed is reduced. As a result, the photoelectric conversion efficiency is reduced, so that the fullerene or fullerene derivative contained in the photoelectric conversion layer 32 preferably has a composition of 85% or less.
- the mixed layer obtained by mixing the p-type organic semiconductor and the fullerene or the fullerene derivative is represented by D50% of the plurality of particles mainly composed of the fullerene or the fullerene derivative. It is assumed that vapor deposition is performed using a vapor deposition material for photoelectric conversion elements having an average particle diameter of 50 ⁇ m to 300 ⁇ m. A film containing fullerene or a fullerene derivative deposited using such a vapor deposition material is formed using a vapor deposition material in which the particle size of particles containing fullerene or a fullerene derivative is optimized. Therefore, as will be described later in Examples, the photoelectric conversion element 1 provided with such a photoelectric conversion layer 32 has high photoelectric conversion efficiency, good S / N ratio of photocurrent / dark current, and response speed. It will be fast.
- the p-type organic semiconductor is preferably a compound represented by the following general formula (1).
- L 2 and L 3 each independently represent an unsubstituted methine group or a substituted methine group.
- N represents an integer of 0 to 2.
- Ar 1 represents a divalent substituted arylene group or an unsubstituted arylene.
- Ar 3 represents a group independently represents a substituted aryl group, an unsubstituted aryl group, a substituted alkyl group, an unsubstituted alkyl group, .Ar 1 representing a heteroaryl group, or an unsubstituted heteroaryl group into substituted, Adjacent ones of Ar 2 and Ar 3 may be linked to each other to form a ring, L 1 is an unsubstituted methine group or a substituted methine group bonded to the following general formula (2), or the following general formula The group represented by (3) is represented.
- Z 1 is a ring containing a carbon atom bonded to L 1 and a carbonyl group adjacent to the carbon atom, and is a 5-membered ring, a 6-membered ring, or a 5-membered ring or a 6-membered ring.
- Z 2 is a ring containing X, and represents a 5-membered ring, a 6-membered ring, a 7-membered ring, or a condensed ring containing at least one of a 5-membered ring, a 6-membered ring, and a 7-membered ring.
- L 4 to L 6 each independently represents an unsubstituted methine group or a substituted methine group.
- R 6 and R 7 each independently represents a hydrogen atom or a substituent, and adjacent ones may be bonded to each other to form a ring.
- k represents an integer of 0-2. * In the general formula (2) represents a bonding position bonded to L 1, and * in the general formula (3) represents a bonding position bonded to L 2 or Ar 1 .
- Z 1 in the general formula (2) is a ring containing two carbon atoms and represents a 5-membered ring, a 6-membered ring, or a condensed ring containing at least one of a 5-membered ring and a 6-membered ring.
- a ring what is normally used as an acidic nucleus with a merocyanine dye is preferable, and specific examples thereof include the following.
- (B) pyrazolinone nucleus for example 1-phenyl-2-pyrazolin-5-one, 3-methyl-1-phenyl-2-pyrazolin-5-one, 1- (2-benzothiazoyl) -3-methyl-2 -Pyrazolin-5-one and the like.
- (D) Oxindole nucleus For example, 1-alkyl-2,3-dihydro-2-oxindole and the like.
- (E) 2,4,6-triketohexahydropyrimidine nucleus for example, barbituric acid or 2-thiobarbituric acid and derivatives thereof.
- the derivatives include 1-alkyl compounds such as 1-methyl and 1-ethyl, 1,3-dialkyl compounds such as 1,3-dimethyl, 1,3-diethyl and 1,3-dibutyl, 1,3-diphenyl, 1,3-diaryl compounds such as 1,3-di (p-chlorophenyl) and 1,3-di (p-ethoxycarbonylphenyl), 1-alkyl-1-aryl compounds such as 1-ethyl-3-phenyl, Examples include 1,3-di (2-pyridyl) 1,3-diheterocyclic substituents and the like.
- (F) 2-thio-2,4-thiazolidinedione nucleus for example, rhodanine and its derivatives.
- the derivatives include 3-alkylrhodanine such as 3-methylrhodanine, 3-ethylrhodanine and 3-allylrhodanine, 3-arylrhodanine such as 3-phenylrhodanine, and 3- (2-pyridyl) rhodanine. And the like.
- (J) 2,4-thiazolidinedione nucleus: for example, 2,4-thiazolidinedione, 3-ethyl-2,4-thiazolidinedione, 3-phenyl-2,4-thiazolidinedione and the like.
- (M) 2-thio-2,4-imidazolidinedione (2-thiohydantoin) nucleus for example, 2-thio-2,4-imidazolidinedione, 3-ethyl-2-thio-2,4-imidazolidinedione etc.
- (N) 2-imidazolin-5-one nucleus for example, 2-propylmercapto-2-imidazolin-5-one and the like.
- (O) 3,5-pyrazolidinedione nucleus for example, 1,2-diphenyl-3,5-pyrazolidinedione, 1,2-dimethyl-3,5-pyrazolidinedione and the like.
- Benzothiophen-3-one nucleus for example, benzothiophen-3-one, oxobenzothiophen-3-one, dioxobenzothiophen-3-one and the like.
- Indanone nucleus for example, 1-indanone, 3-phenyl-1-indanone, 3-methyl-1-indanone, 3,3-diphenyl-1-indanone, 3,3-dimethyl-1-indanone, etc.
- the ring represented by Z 1 is preferably a 1,3-dicarbonyl nucleus, a pyrazolinone nucleus, a 2,4,6-triketohexahydropyrimidine nucleus (including a thioketone body, for example, a barbituric acid nucleus, a 2-thiobarbituric acid nucleus ), 2-thio-2,4-thiazolidinedione nucleus, 2-thio-2,4-oxazolidinedione nucleus, 2-thio-2,5-thiazolidinedione nucleus, 2,4-thiazolidinedione nucleus, 2,4- An imidazolidinedione nucleus, a 2-thio-2,4-imidazolidinedione nucleus, a 2-imidazolin-5-one nucleus, a 3,5-pyrazolidinedione nucleus, a benzothiophen-3-one nucleus, an indanone nucleus,
- Z 1 What is preferable as a ring represented by Z 1 is represented by the following formula.
- Z 3 is a ring containing a carbon atom bonded to L 1 and two carbonyl groups adjacent to the carbon atom, and is a 5-membered ring, a 6-membered ring, or a 5-membered ring and a 6-membered ring.
- a condensed ring containing at least one of them is represented. * Represents a bonding position for coupling with L 1.
- the Z3 can be selected from the ring above Z 1 represents, preferably a 1,3-dicarbonyl nucleus or a 2,4,6-triketohexahydropyrimidine nucleus (including a thioketone form), particularly preferably 1,3-indandione nucleus, barbituric acid nucleus, 2-thiobarbituric acid nucleus and derivatives thereof.
- the ring represented by Z 1 is a 1,3-indandione nucleus, it is preferably a group represented by the following general formula (5).
- R 2 to R 5 each independently represents a hydrogen atom or a substituent, and adjacent ones may be bonded to each other to form a ring. * Represents a bonding position for coupling with L 1.
- K in the general formula (3) represents an integer of 0 to 2, preferably 0 or 1, more preferably 0.
- X is preferably O, S, or N—R10.
- a preferable ring represented by Z 2 is represented by the following formula (6).
- X represents O, S, or N—R 10 .
- R 10 represents a hydrogen atom or a substituent.
- R 1 , R 6 and R 7 each independently represent a hydrogen atom or a substituent, and adjacent ones may be bonded to each other to form a ring.
- m represents an integer of 1 to 3. When m is 2 or more, the plurality of R 1 may be the same or different. * Represents a bonding position bonded to L 2 or Ar 1 .
- the arylene group represented by Ar 1 is preferably an arylene group having 6 to 30 carbon atoms, and more preferably an arylene group having 6 to 18 carbon atoms.
- the arylene group may have a substituent, and is preferably an arylene group having 6 to 18 carbon atoms which may have an alkyl group having 1 to 4 carbon atoms. Examples include a phenylene group, a naphthylene group, a methylphenylene group, a dimethylphenylene group, and the like, and a phenylene group and a naphthylene group are preferable.
- the aryl groups represented by Ar 2 and Ar 3 are each independently preferably an aryl group having 6 to 30 carbon atoms, and more preferably an aryl group having 6 to 18 carbon atoms.
- the aryl group may have a substituent, preferably an alkyl group having 1 to 4 carbon atoms or an aryl group having 6 to 18 carbon atoms which may have an aryl group having 6 to 18 carbon atoms. is there.
- a phenyl group, a naphthyl group, a tolyl group, an anthryl group, a dimethylphenyl group, a biphenyl group etc. are mentioned, A phenyl group and a naphthyl group are preferable.
- the alkyl group represented by Ar 2 and Ar 3 is preferably an alkyl group having 1 to 6 carbon atoms, and more preferably an alkyl group having 1 to 4 carbon atoms. Examples thereof include a methyl group, an ethyl group, an n-propyl group, an isopropyl group, an n-butyl group, an isobutyl group, and a t-butyl group. A methyl group or an ethyl group is preferable, and a methyl group is more preferable.
- the heteroaryl groups represented by Ar 2 and Ar 3 are each independently preferably a heteroaryl group having 3 to 30 carbon atoms, more preferably a heteroaryl group having 3 to 18 carbon atoms.
- the heteroaryl group may have a substituent, preferably an alkyl group having 1 to 4 carbon atoms or an aryl group having 6 to 18 carbon atoms, and a heteroaryl having 3 to 18 carbon atoms It is a group.
- the heteroaryl group represented by Ar 2 or Ar 3 may have a condensed ring structure, such as a furan ring, a thiophene ring, a selenophene ring, a silole ring, a pyridine ring, a pyrazine ring, a pyrimidine ring, an oxazole ring, a thiazole ring, or a triazole.
- a condensed ring structure selected from a ring, an oxadiazole ring, and a thiadiazole ring (which may be the same) is preferable.
- a bithienothiophene ring is preferred.
- Ar 1 , Ar 2 , Ar 3 , R 1 , R 2 to R 7 , R 10 may be adjacent to each other to form a ring.
- the ring is preferably a ring formed of a hetero atom, an alkylene group, an aromatic ring, or the like.
- an aryl group for example, Ar 1 , Ar 2 , Ar 3 in the general formula (1)
- Ar 1 , Ar 2 , Ar 3 in the general formula (1) is linked via a single bond or a linking group, so that together with a nitrogen atom (N in the general formula (1))
- N nitrogen atom
- linking group examples include a hetero atom (eg, —O—, —S—, etc.), an alkylene group (eg, methylene group, ethylene group, etc.), and a group consisting of a combination thereof, —S—, A methylene group is preferred.
- a ring formed by a nitrogen atom (for example, N in the general formula (1)), an alkylene group (for example, a methylene group) and an aryl group (for example, Ar 1 , Ar 2 or Ar 3 in the general formula (1)) is preferable.
- the ring may further have a substituent, and examples of the substituent include an alkyl group (preferably an alkyl group having 1 to 4 carbon atoms, more preferably a methyl group). They may be connected to each other to further form a ring (for example, a benzene ring).
- R 3 and R 4 are preferably connected to each other to form a ring, and the ring is preferably a benzene ring.
- adjacent ones of the plurality of R 1 can be connected to each other to form a ring, and the ring is preferably a benzene ring.
- R 1 , Ar 2 , Ar 3 has a substituent
- the substituents of R 1 , R 2 to R 7 , R 10 include a halogen atom, an alkyl group (cycloalkyl group, bicycloalkyl group) , Including tricycloalkyl groups), substituted alkyl groups, alkenyl groups (including cycloalkenyl groups and bicycloalkenyl groups), alkynyl groups, aryl groups, substituted aryl groups, and heterocyclic groups (may be referred to as heterocyclic groups) Cyano group, hydroxy group, nitro group, carboxy group, alkoxy group, aryloxy group, silyloxy group, heterocyclic oxy group, acyloxy group, carbamoyloxy group, alkoxycarbonyl group, aryloxycarbonyl group, amino group (anilino group) ), Ammonio group, acylamino group, aminocarbonylamino group, alkoxy
- R1, R2 to R7, and R10 are particularly alkyl groups, substituted alkyl groups, aryl groups, substituted aryl groups, heteroaryl groups, cyano groups, nitro groups, alkoxy groups, aryloxy groups, amino groups, alkylthio groups. , An alkenyl group or a halogen atom is preferred.
- Ar 1 , Ar 2 , Ar 3 have a substituent, each independently a halogen atom, alkyl group, aryl group, heterocyclic group, hydroxy group, nitro group, alkoxy group, aryloxy group, heterocyclic oxy group, amino Group, alkylthio group, arylthio group, alkenyl group, cyano group or heterocyclic thio group is preferred.
- R 1 is more preferably an alkyl group or an aryl group.
- R 6 and R 7 are more preferably a cyano group.
- Examples of the substituent of the substituted alkyl group or the substituted aryl group include the substituents listed above.
- An alkyl group preferably an alkyl group having 1 to 4 carbon atoms, more preferably a methyl group
- an aryl group carbon
- An aryl group of 6 to 18 and more preferably a phenyl group is preferable.
- L 1 , L 2 , L 3 , L 4 , L 5 , and L 6 each independently represent an unsubstituted methine group or a substituted methine group
- the substituent of the substituted methine group is an alkyl group, an aryl group, or a heterocyclic ring
- a 6-membered ring (for example, benzene ring etc.) is mentioned as a ring.
- the substituents of L 1 or L 3 and Ar 1 may be bonded to form a ring.
- the substituents of L 6 and R 7 may be bonded to each other to form a ring.
- the alkyl group represented by R 1 , R 2 to R 7 , and R 10 is preferably an alkyl group having 1 to 6 carbon atoms, and more preferably an alkyl group having 1 to 4 carbon atoms. Examples thereof include a methyl group, an ethyl group, an n-propyl group, an isopropyl group, an n-butyl group, an isobutyl group, and a t-butyl group.
- R 2 to R 7 are preferably a methyl group or an ethyl group, and more preferably a methyl group.
- R 1 is preferably a methyl group, an ethyl group or a t-butyl group, more preferably a methyl group or a t-butyl group.
- n is preferably 0 or 1.
- the aryl groups represented by R 1 , R 2 to R 7 and R 10 are each independently preferably an aryl group having 6 to 30 carbon atoms, and more preferably an aryl group having 6 to 18 carbon atoms.
- the aryl group may have a substituent, preferably an alkyl group having 1 to 4 carbon atoms or an aryl group having 6 to 18 carbon atoms which may have an aryl group having 6 to 18 carbon atoms. is there.
- Examples include a phenyl group, a naphthyl group, an anthracenyl group, a pyrenyl group, a phenanthrenyl group, a methylphenyl group, a dimethylphenyl group, a biphenyl group, and the like, and a phenyl group, a naphthyl group, or an anthracenyl group is preferable.
- the heteroaryl groups represented by R 1 , R 2 to R 7 and R 10 are each independently preferably a heteroaryl group having 3 to 30 carbon atoms, more preferably a heteroaryl group having 3 to 18 carbon atoms. is there.
- the heteroaryl group may have a substituent, preferably an alkyl group having 1 to 4 carbon atoms or an aryl group having 6 to 18 carbon atoms, and a heteroaryl having 3 to 18 carbon atoms It is a group.
- the heteroaryl group represented by R 1 , R 2 to R 7 is preferably a heteroaryl group comprising a 5-membered, 6-membered or 7-membered ring or a condensed ring thereof.
- hetero atom contained in the heteroaryl group examples include an oxygen atom, a sulfur atom, and a nitrogen atom.
- ring constituting the heteroaryl group include a furan ring, a thiophene ring, a pyrrole ring, a pyrroline ring, a pyrrolidine ring, an oxazole ring, an isoxazole ring, a thiazole ring, an isothiazole ring, an imidazole ring, an imidazoline ring, and an imidazolidine.
- benzofuran ring isobenzofuran ring, benzothiophene ring, indole ring, indoline ring, isoindole ring, benzoxazole ring, benzothiazole ring, indazole ring, benzimidazole ring, quinoline ring, isoquinoline ring, cinnoline ring, Phthalazine ring, quinazoline ring, quinoxaline ring, dibenzofuran ring, carbazole ring, xanthene ring, acridine ring, phenanthridine ring, phenanthroline ring, phenazine ring, phenoxazine ring, thianthrene ring, thienothiophene ring, indolizine ring, quinolidine ring, A quinuclidine ring, a naphthyridine ring, a pur
- M represents an integer of 1 to 3, preferably 1 or 2, and more preferably 1.
- Electron blocking layer 31 included in the light receiving layer 30 suppresses the injection of electrons from the lower electrode 20 into the photoelectric conversion layer 32 and inhibits the electrons generated in the photoelectric conversion layer 32 from flowing to the electrode 2 side.
- the electron blocking layer 31 includes an organic material, an inorganic material, or both.
- the electron blocking layer 31 may be composed of a plurality of layers. By doing in this way, an interface is formed between each layer which comprises the electron blocking layer 31, and a discontinuity arises in the intermediate level which exists in each layer. As a result, it becomes difficult for the charge to move through the intermediate level and the like, so that the electron blocking effect can be enhanced.
- the layers constituting the electron blocking layer 31 are made of the same material, the intermediate levels existing in the layers may be exactly the same. Therefore, in order to further enhance the electron blocking effect, the materials constituting the layers are different. It is preferable to make it.
- An electron donating organic material can be used for the electron blocking layer 31.
- TPD N, N′-bis (3
- Polyphyrin compounds triazole derivatives, oxa Zazole derivatives, imidazole derivatives, polyarylalkane derivatives, pyrazoline derivatives, pyrazolone derivatives, phenylenediamine derivatives, arylamine derivatives, fluorene derivatives, amino-substituted chalcone derivatives, oxazole derivatives, styrylanthracene derivatives, fluorenone derivatives, hydrazone derivatives, silazane derivatives, etc.
- polymers such as phenylene vinylene, fluorene, carbazole, indole, pyrene, pyrrole, picoline, thiophene, acetylene, diacetylene, and derivatives thereof can be used. Even if it is not, it is possible to use a compound having sufficient hole transportability.
- Ea represents the electron affinity of the material
- Ip represents the ionization potential of the material.
- EB in EB-1, 2,... Stands for “electronic blocking”.
- An inorganic material can also be used as the electron blocking layer 31.
- an inorganic material has a dielectric constant larger than that of an organic material, when it is used for the electron blocking layer 31, a large voltage is applied to the photoelectric conversion layer 32, and the photoelectric conversion efficiency can be increased.
- Materials that can be the electron blocking layer 31 include calcium oxide, chromium oxide, chromium oxide copper, manganese oxide, cobalt oxide, nickel oxide, copper oxide, gallium copper oxide, strontium copper oxide, niobium oxide, molybdenum oxide, indium copper oxide, Examples include indium silver oxide and iridium oxide.
- the layer adjacent to the photoelectric conversion layer 32 among the plurality of layers is preferably a layer made of the same material as the p-type organic semiconductor contained in the photoelectric conversion layer 32.
- the same p-type organic semiconductor for the electron blocking layer 31 it is possible to suppress the formation of intermediate levels at the interface between the photoelectric conversion layer 32 and the adjacent layer, and to further suppress the dark current.
- the layer can be a layer made of an inorganic material, or in the case of a plurality of layers, one or more layers can be a layer made of an inorganic material. it can.
- the hole blocking layer suppresses injection of holes from the lower electrode 20 into the photoelectric conversion layer 32, and inhibits holes generated in the photoelectric conversion layer 32 from flowing toward the lower electrode 20 side.
- a layer formed of an organic material may be used. By making the hole blocking layer into a plurality of layers, the hole blocking effect can be enhanced.
- electrons or holes collected by the upper electrode 40 may be converted into a voltage signal corresponding to the amount and taken out to the outside.
- an electron blocking layer or a hole blocking layer may be provided between the upper electrode 40 and the photoelectric conversion layer 32. In either case, the portion sandwiched between the lower electrode 20 and the upper electrode 40 becomes the light receiving layer 30.
- An electron-accepting organic material can be used for the hole blocking layer.
- electron accepting materials include oxadiazole derivatives such as 1,3-bis (4-tert-butylphenyl-1,3,4-oxadiazolyl) phenylene (OXD-7), anthraquinodimethane derivatives, and diphenylquinone derivatives.
- OXD-7 1,3-bis (4-tert-butylphenyl-1,3,4-oxadiazolyl) phenylene
- anthraquinodimethane derivatives anthraquinodimethane derivatives
- diphenylquinone derivatives diphenylquinone derivatives.
- Bathocuproine, bathophenanthroline, and derivatives thereof triazole compounds, tris (8-hydroxyquinolinato) aluminum complexes, bis (4-methyl-8-quinolinato) aluminum complexes, distyrylarylene derivatives, silole compounds, etc. Can do.
- a porphyrin compound or a styryl compound such as DCM (4-dicyanomethylene-2-methyl-6- (4- (dimethylaminostyryl))-4H pyran) or a 4H pyran compound can be used.
- the p-type organic semiconductor (compound) constituting the photoelectric conversion layer 32 is a donor organic semiconductor (compound), which is mainly represented by a hole-transporting organic compound and refers to an organic compound having a property of easily donating electrons. . More specifically, an organic compound having a smaller ionization potential when two organic materials are used in contact with each other. Therefore, any organic compound can be used as the donor organic compound as long as it is an electron-donating organic compound.
- the hole blocking layer is also preferably formed using the organic material 60 for film formation.
- the sealing layer 50 is a layer for preventing a factor that degrades an organic material such as water and oxygen from entering the light receiving layer containing the organic material.
- the sealing layer 50 is formed so as to cover the lower electrode 20, the electron blocking layer 31, the photoelectric conversion layer 32, and the upper electrode 40.
- the photoelectric conversion layer 32 since incident light reaches the photoelectric conversion layer 32 through the sealing layer 50, the photoelectric conversion layer 32 has sufficient sensitivity to light having a wavelength with which the photoelectric conversion layer 32 has sensitivity. It must be transparent.
- the sealing layer 50 include ceramics such as dense metal oxide, metal nitride, and metal nitride oxide that do not allow water molecules to permeate, diamond-like carbon (DLC), and the like. Conventionally, aluminum oxide, silicon oxide, Silicon nitride, silicon nitride oxide, a laminated film thereof, a laminated film of them and an organic polymer, or the like is used.
- the sealing layer 50 can be composed of a thin film made of a single material, but by providing a separate function for each layer in a multi-layer structure, the stress relaxation of the entire sealing layer 50 and dust generation during the manufacturing process Such effects as the suppression of defects such as cracks and pinholes caused by the above, and the optimization of material development can be expected.
- the sealing layer 50 is formed by laminating a “sealing auxiliary layer” having a function that is difficult to achieve on the layer that serves the original purpose of preventing the penetration of deterioration factors such as water molecules.
- a two-layer structure can be formed. Although it is possible to have three or more layers, it is preferable that the number of layers is as small as possible in consideration of manufacturing costs.
- the formation method of the sealing layer 50 is not particularly limited, and is preferably formed by a method that does not deteriorate the performance and film quality of the already formed photoelectric conversion layer 32 and the like as much as possible.
- the film is generally formed by various vacuum film formation techniques, but the conventional sealing layer is a thin film at a step due to a structure on the substrate surface, minute defects on the substrate surface, particles adhering to the substrate surface, and the like. Is difficult to grow (because the step becomes a shadow), the film thickness is significantly thinner than the flat part. For this reason, the step portion becomes a path through which the deterioration factor penetrates.
- the degree of vacuum when forming the sealing layer is preferably 1 ⁇ 10 3 Pa or less, and more preferably 5 ⁇ 10 2 Pa or less.
- the atomic layer deposition (ALD) method is a kind of CVD method, and adsorption / reaction of organometallic compound molecules, metal halide molecules, and metal hydride molecules, which are thin film materials, onto the substrate surface and unreacted groups contained therein. Is a technique for forming a thin film by alternately repeating decomposition. When the thin film material reaches the substrate surface, it is in the above-mentioned low molecular state, so that the thin film can be grown in a very small space where the low molecule can enter.
- the step portion which was difficult with the conventional thin film formation method, is completely covered (the thickness of the thin film grown on the step portion is the same as the thickness of the thin film grown on the flat portion), that is, the step coverage is very high. Excellent. For this reason, steps due to structures on the substrate surface, minute defects on the substrate surface, particles adhering to the substrate surface, and the like can be completely covered, and such a step portion does not become an intrusion path for a deterioration factor of the photoelectric conversion material.
- the sealing layer 50 is formed by the atomic layer deposition method, the required sealing layer thickness can be effectively reduced as compared with the prior art.
- the sealing layer 50 is formed by the atomic layer deposition method, a material corresponding to the ceramics preferable for the sealing layer 50 described above can be selected as appropriate.
- the photoelectric conversion layer of the present invention uses an organic photoelectric conversion material, it is limited to a material capable of growing a thin film at a relatively low temperature so that the organic photoelectric conversion material does not deteriorate.
- a dense aluminum oxide thin film can be formed at less than 200 ° C. at which the organic photoelectric conversion material does not deteriorate.
- an aluminum oxide thin film can be formed even at about 100 ° C.
- Silicon oxide and titanium oxide are also preferable because a dense thin film can be formed at less than 200 ° C., similarly to aluminum oxide, by appropriately selecting materials.
- the thin film formed by the atomic layer deposition method can achieve a high-quality thin film formation at a low temperature that is unmatched in terms of step coverage and denseness.
- the physical properties of the thin film material may be deteriorated by chemicals used in the photolithography process. For example, since an aluminum oxide thin film formed by atomic layer deposition is amorphous, the surface is eroded by an alkaline solution such as a developer or a stripping solution.
- thin films formed by CVD such as atomic layer deposition
- CVD chemical vapor deposition
- atomic layer deposition often have tensile stresses with very large internal stress, such as processes that repeat intermittent heating and cooling, such as semiconductor manufacturing processes, Due to storage / use in a high temperature / high humidity atmosphere for a period, deterioration of the thin film itself may occur.
- the sealing layer 50 formed by the atomic layer deposition method it is preferable to form a sealing auxiliary layer that has excellent chemical resistance and can cancel the internal stress of the sealing layer 50.
- auxiliary sealing layer examples include any of ceramics such as metal oxide, metal nitride, and metal nitride oxide that are excellent in chemical resistance formed by physical vapor deposition (PVD) such as sputtering. Or a layer containing one of them. Ceramics formed by a PVD method such as sputtering often has a large compressive stress, and can cancel the tensile stress of the sealing layer 50 formed by an atomic layer deposition method.
- PVD physical vapor deposition
- the sealing layer 50 formed by the atomic layer deposition method preferably includes any of aluminum oxide, silicon oxide, and titanium oxide.
- the sealing auxiliary layer includes aluminum oxide, silicon oxide, silicon nitride, and silicon nitride oxide.
- a sputtered film containing any one of the above is preferable.
- the thickness of the sealing layer 50 is preferably 0.05 ⁇ m or more and 0.5 ⁇ m or less.
- the photoelectric conversion element 1 is configured.
- FIG. 3 is a schematic cross-sectional view showing a schematic configuration of an image sensor for explaining an embodiment of the present invention.
- This imaging device is used by being mounted on an imaging device such as a digital camera or a digital video camera, an imaging module such as an electronic endoscope or a mobile phone, or the like.
- the image pickup device 100 is a circuit board on which a plurality of organic photoelectric conversion elements 1 configured as shown in FIG. 1 and a readout circuit that reads out signals corresponding to charges generated in the photoelectric conversion layer of each organic photoelectric conversion element are formed. And a plurality of organic photoelectric conversion elements are arranged one-dimensionally or two-dimensionally on the same surface above the circuit board.
- the image sensor 100 includes a substrate 101, an insulating layer 102, a connection electrode 103, a pixel electrode 104, a connection portion 105, a connection portion 106, a light receiving layer 107, a counter electrode 108, a buffer layer 109, a sealing layer.
- a stop layer 110, a color filter (CF) 111, a partition wall 112, a light shielding layer 113, a protective layer 114, a counter electrode voltage supply unit 115, and a readout circuit 116 are provided.
- the pixel electrode 104 has the same function as the lower electrode 20 of the organic photoelectric conversion element 1 shown in FIG.
- the counter electrode 108 has the same function as the upper electrode 40 of the organic photoelectric conversion element 1 shown in FIG.
- the light receiving layer 107 has the same configuration as the light receiving layer 30 provided between the lower electrode 20 and the upper electrode 40 of the organic photoelectric conversion element 1 shown in FIG.
- the sealing layer 110 has the same function as the sealing layer 50 of the organic photoelectric conversion element 1 shown in FIG.
- the pixel electrode 104, a part of the counter electrode 108 facing the pixel electrode 104, the light receiving layer 107 sandwiched between the electrodes, and the buffer layer 109 and the part of the sealing layer 110 facing the pixel electrode 104 are subjected to organic photoelectric conversion.
- the element is configured.
- the substrate 101 is a glass substrate or a semiconductor substrate such as Si.
- An insulating layer 102 is formed on the substrate 101.
- a plurality of pixel electrodes 104 and a plurality of connection electrodes 103 are formed on the surface of the insulating layer 102.
- the light receiving layer 107 is a layer common to all the organic photoelectric conversion elements provided on the plurality of pixel electrodes 104 so as to cover them.
- the counter electrode 108 is one electrode provided on the light receiving layer 107 and common to all the organic photoelectric conversion elements.
- the counter electrode 108 is formed up to the connection electrode 103 disposed outside the light receiving layer 107 and is electrically connected to the connection electrode 103.
- connection part 106 is embedded in the insulating layer 102 and is a plug or the like for electrically connecting the connection electrode 103 and the counter electrode voltage supply part 115.
- the counter electrode voltage supply unit 115 is formed on the substrate 101 and applies a predetermined voltage to the counter electrode 108 via the connection unit 106 and the connection electrode 103.
- the power supply voltage is boosted by a booster circuit such as a charge pump to supply the predetermined voltage.
- the readout circuit 116 is provided on the substrate 101 corresponding to each of the plurality of pixel electrodes 104, and reads out a signal corresponding to the charge collected by the corresponding pixel electrode 104.
- the reading circuit 116 is configured by, for example, a CCD, a MOS circuit, or a TFT circuit, and is shielded from light by a light shielding layer (not shown) disposed in the insulating layer 102.
- the readout circuit 116 is electrically connected to the corresponding pixel electrode 104 via the connection unit 105.
- the buffer layer 109 is formed on the counter electrode 108 so as to cover the counter electrode 108.
- the sealing layer 110 is formed on the buffer layer 109 so as to cover the buffer layer 109.
- the color filter 111 is formed at a position facing each pixel electrode 104 on the sealing layer 110.
- the partition wall 112 is provided between the color filters 111 and is for improving the light transmission efficiency of the color filter 111.
- the light shielding layer 113 is formed in a region other than the region where the color filter 111 and the partition 112 are provided on the sealing layer 110, and prevents light from entering the light receiving layer 107 formed outside the effective pixel region.
- the protective layer 114 is formed on the color filter 111, the partition 112, and the light shielding layer 113, and protects the entire image sensor 100.
- the imaging device 100 when light is incident, the light is incident on the light receiving layer 107, and charges are generated here. Holes in the generated charges are collected by the pixel electrode 104, and a voltage signal corresponding to the amount is output to the outside of the image sensor 100 by the readout circuit 116.
- the manufacturing method of the image sensor 100 is as follows.
- connection portions 105 and 106, the plurality of connection electrodes 103, the plurality of pixel electrodes 104, and the insulating layer 102 are formed on the circuit substrate on which the counter electrode voltage supply portion 115 and the readout circuit 116 are formed.
- the plurality of pixel electrodes 104 are arranged on the surface of the insulating layer 102 in a square lattice pattern, for example.
- a light receiving layer 107, a counter electrode 108, a buffer layer 109, and a sealing layer 110 are sequentially formed on the plurality of pixel electrodes 104.
- the formation method of the light receiving layer 107, the counter electrode 108, and the sealing layer 110 is as described in the description of the photoelectric conversion element 1.
- the buffer layer 109 is formed by, for example, a vacuum resistance heating vapor deposition method.
- the protective layer 114 is formed, and the imaging element 100 is completed.
- the imaging element and the photoelectric conversion element suitable as the imaging element the aspect including the light receiving layer formed using the organic material for film formation of the present invention has been described.
- the organic material for film formation of the present invention has been described.
- 60 can also be preferably used for forming a light emitting layer in an organic electroluminescent device and a photoelectric conversion device suitable as an organic electroluminescent device.
- Examples 1 to 4 and Comparative Examples 1 and 2 A glass substrate was prepared, and an amorphous ITO lower electrode (thickness: 30 nm) was formed on the substrate by sputtering, and then the above-mentioned EB-3 was formed by vacuum resistance heating vapor deposition (100 nm thickness) as an electron blocking layer. ).
- fullerenes (C 60 ) having different amounts of foreign matters that could become pixel defects, and the compound 1 were prepared as film-forming organic materials for photoelectric conversion layers.
- Comparative Example 2 in Table 1 was used as a commercially available fullerene vapor deposition source, and the amount of foreign matter in each example was adjusted and used by the method shown below so that the amount of foreign matter shown in Table 1 was achieved.
- All the film-forming materials used had an HPLC purity of 99.5% or more, and the amount of metal impurities was less than 10 ppm each.
- Compound 1 was synthesized as follows, and the amount of foreign matter was common to the previous examples.
- the amount of foreign matter remaining in each example was such that 10 mg of the powder of each example was completely dissolved in 50 ml of toluene, the solution was suction filtered with a membrane filter having a pore size of 0.1 ⁇ m, and then no foreign matter adhered. It measured by measuring the mass of the foreign material which remained on the filter after air-drying.
- a photoelectric conversion layer was formed on the electron blocking layer by co-evaporation so as to have a film thickness of 500 nm (Examples 1 to 4, Comparative Examples 1 and 2). Co-evaporation was performed by vacuum resistance heating deposition. Vacuum deposition of the electron blocking layer and the photoelectric conversion layer was all performed at a vacuum degree of 4 ⁇ 10 ⁇ 4 Pa or less. The volume ratio of the fullerene C 60 in the photoelectric conversion layer which is formed with the Compound 1 was 3: 1 (thickness conversion).
- an amorphous ITO upper electrode (10 nm thick) was formed on the photoelectric conversion layer by a sputtering method to obtain the photoelectric conversion element of the present invention.
- a SiO film was formed as a sealing layer by heating vapor deposition, and an Al 2 O 3 layer was further formed by ALCVD.
- the image pickup device of each example was manufactured in the same manner as described above except that a CMOS substrate on which a readout circuit composed of a CMOS circuit and a connection electrode connected thereto was used as the substrate.
- Example 1 As shown in Table 1, the larger the amount of foreign matter, the greater the number of defects such as white scratches and black scratches.
- relative sensitivity and the number of pixel defects are shown with reference to Example 1 in which the content of foreign matter is 0% by mass.
- the allowable range is at least about 10 times that of Example 1, and the amount of foreign matter in the organic material for forming the light receiving layer is less than 1.0% by mass, preferably 0.8% by mass or less. It was confirmed that it was preferable.
- the organic material for film formation and the film forming method using the same of the present invention are applied to an organic imaging device mounted on a digital camera, a camera for a mobile phone, an endoscope camera, an organic EL display, an organic EL illumination, or the like. It can be preferably applied to film formation of an organic layer of an organic photoelectric conversion element used for an organic light emitting element to be mounted, an organic thin film transistor mounted on an electronic paper or a wireless tag, an optical sensor, or the like.
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Abstract
Le problème décrit par l'invention concerne la fabrication stable d'un élément de conversion photoélectrique organique, ayant peu de défauts de pixels, utilisé dans un capteur de lumière. La solution de l'invention porte sur une matière organique (60) destinée à la formation de film, utilisée pour la formation de film sec de la couche (30) de réception de lumière d'un élément de conversion photoélectrique organique (1) utilisé dans un capteur de lumière, qui constitue le composant principal de la matière organique constitutive de la couche (30) de réception de lumière et contient moins de 1,0 % en masse de substances ne pouvant pas être détectées à l'aide de chromatographie liquide haute performance.
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KR1020157011502A KR20150064180A (ko) | 2012-10-04 | 2013-09-27 | 성막용 유기 재료 및 그것을 사용하여 얻어진 유기 광전 변환 소자, 촬상 소자, 수광층 형성 방법, 유기 광전 변환 소자의 제조 방법 |
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EP3041060A1 (fr) | 2014-12-19 | 2016-07-06 | Samsung Electronics Co., Ltd | Composé pour dispositif photoélectrique organique et un tel dispositif, capteur d'image et dispositif électronique le comprenant |
DE112020004244T5 (de) | 2019-10-23 | 2022-06-15 | Japan Display Inc. | Halbleitervorrichtung |
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US9905837B2 (en) * | 2014-08-21 | 2018-02-27 | Sony Corporation | Imaging element, solid-state imaging device, and electronic device |
JP6371648B2 (ja) * | 2014-09-12 | 2018-08-08 | 富士フイルム株式会社 | 水分解用光触媒電極 |
WO2016120007A1 (fr) | 2015-01-30 | 2016-08-04 | Merck Patent Gmbh | Formulations à faible teneur en particules |
KR102421068B1 (ko) * | 2015-09-16 | 2022-07-14 | 엘지이노텍 주식회사 | 먼지 센서 |
KR20190126106A (ko) * | 2017-04-07 | 2019-11-08 | 후지필름 가부시키가이샤 | 광전 변환 소자, 광센서, 및 촬상 소자 |
EP3761346A4 (fr) * | 2018-03-02 | 2021-04-21 | Mitsubishi Gas Chemical Company, Inc. | Liquide protecteur d'alumine, procede de protection d'alumine et procede de fabrication de substrat semi-conducteur possedant une couche d'alumine mettant en oeuvre ce procede de protection d'alumine |
WO2024075812A1 (fr) * | 2022-10-05 | 2024-04-11 | 三菱ケミカル株式会社 | Composition d'encre semi-conductrice organique ainsi que procédé de fabrication de celle-ci, film de conversion photoélectrique organique, et élément de conversion photoélectrique organique |
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