CN100359407C - Laminated bilayer light conductor and its preparation method - Google Patents
Laminated bilayer light conductor and its preparation method Download PDFInfo
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- CN100359407C CN100359407C CNB2005100143824A CN200510014382A CN100359407C CN 100359407 C CN100359407 C CN 100359407C CN B2005100143824 A CNB2005100143824 A CN B2005100143824A CN 200510014382 A CN200510014382 A CN 200510014382A CN 100359407 C CN100359407 C CN 100359407C
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Abstract
The present invention relates to a laminated bilayer light conductor and a preparation method thereof, which belongs to the electrophotography. The light conductor is composed of a metallic aluminium or a copper electric conduction basal layer, a blocking layer, a charge generating layer and a charge transmitting layer, wherein the blocking layer which is arranged on the metallic aluminium or the copper electric conduction basal layer is composed of alcohol soluble polyamide; the charge generating layer is arranged on the blocking layer. The charge generating layer comprises more than two diazo molecular-level composite light and electric conduction materials; the charge transmitting layer comprises hydrazone or aryl ethylene tri-phenyl amine compositions. The thickness of the blocking layer, the charge generating layer and the charge transmitting layer is respectively 0 to 1 micron, 0.5 to 15 microns, and 5 to 25 microns. The laminated bilayer light conductor has the advantages of small dark attenuation rate, low residual potential and favorable photosensitivity.
Description
Technical field
The present invention relates to bilayer light conductor of a kind of lamination type and preparation method thereof, belong to Electronic Photographing Technology.
Background technology
Electronic Photographing Technology is widely used in aspects such as black and white and color photocopying, printing, fax, plate making.The key component of Electronic Photographing Technology is an optical conductor, at first requires optical conductor to form electrostatic latent image at the conditions of exposure lower surface, develops through developing material again, forms image by changeing shadow and photographic fixing on the target material at last.The photoconductive layer that uses in the optical conductor should possess following characteristic: 1. higher electric charge ability to accept.Photoconductive layer should make surface charge density remain on 0.5-1.5 * 10
-7Coulomb/centimetre 2 scopes.2. the charge decay speed of dark place is low.3. the response of illumination is wanted fast, and the efficient of charge decay wants high in available spectrum.In general, luminous sensitivity should be consistent with practical light source.4. rest potential is low.5. mechanical properties is good, as require smooth surface, thickness evenly, wearing quality etc.
Optical conductor the earliest adopts inorganic material substantially, as Se, ZnO, CdS etc.Subsequently, the organic light-guide electric material has progressively replaced the leading position of inorganic material because advantage such as good, wide in variety, good, the nuisanceless pollution of light transmission of its machine-shaping property, construction cycle be short, and organic material has accounted for 98% of light conductive material at present.
Initial organic photoconductor is selected the higher polyvinylcarbazole of intensity-trinitro-fluorenone charge transfer complex (PVK/TNF) for use, it be the current collection lotus produce and charge transfer in the single-layer type organic photoconductor of one.In the individual layer photoreceptor, optical conductor not only requires to have high photoproduction efficient, but also the excellent electric charge animal migration will be arranged, and excellent mechanical intensity, and these requirements sometimes are in opposition to each other.Therefore, to satisfy these requirements at the individual layer photoreceptor very big difficulty is arranged.
In the bilayer light conductor, charge generation realizes in two layers that separate with the charge transfer function: at first make the charging of CTM laminar surface homogeneous by corona discharge, exciting through irradiates light then makes CGM produce photo-generated carrier, and it is compound with charging charge by charge transport layer (or charge carrier) positive charge (negative charge) to be sent to CTL surface under electric field action, form electrostatic latent image at photosensitive surface, the negative carrier of exciton (positive carrier) then is transferred to the conduction base.Here the charge generation layer material lays particular emphasis on high luminous sensitivity, thereby absorb most of irradiates lights and produce a large amount of photo-generated carriers, the charge transfer layer material is then mainly considered its transmittability to electric charge, light transmission and physical strength, so just makes the various performances of photoreceptor all improve.
Entered since the eighties, double-deck function divergence type photoreceptor has had significant progress, has improved the generation and the transfer efficiency of electric charge greatly.Along with going deep into of research, to have developed in recent ten years and synthesized several thousand kinds of photoconductive materials, the organic light-guide pigment of different types of structure successfully is applied in the bilayer light conductor.
Along with the development of infotech, people are also more and more higher to capacity and the rate request that organic photoconductor can transmit information, and this is just to the demands for higher performance of organic photoconductor.And at function divergence type sandwich construction organic photoconductor, wherein the charge generating material performance especially photogenerated charge produce efficient and directly have influence on final resolution and the capacity that becomes image with density, and the speed of photoresponse of charge generating material, the carrier mobility speed of charge transport materials and the energy level coupling between the two etc. also directly affect the information transmission speed of organic photoconductor, therefore, the charge generating material of efficient stable and and charge transport materials between coupling be further to improve the OPC performance always, and further improve duplicating machine (or printer) resolution, the core of copying speed.
Summary of the invention
The object of the present invention is to provide bilayer light conductor of a kind of lamination type and preparation method thereof, not only the dark-decay rate is little for prepared lamination type bilayer light conductor, and rest potential is low, and light sensitivity is good.
The present invention is realized by following technical proposals.A kind of bilayer light conductor of lamination type, by conductive basal layer, being followed successively by the restraining barrier of thickness 0～1 μ m, the charge generating layer of thickness 0.5～15 μ m and the charge transport layer of thickness 5～25 μ m on the conductive basal layer forms, described conductive substrates is metallic aluminium or copper, described restraining barrier is pure dissolubility polyamide, it is characterized in that:
The compound that contains the following formula structure in the described charge transport layer is a kind of:
Contain two or more oxa anthracenes or the Benzooxazole kind bisdiazo complex light conducting material among following general formula I or the general formula I I in the described charge generating layer:
Coupling group X in the general formula
1, X
2Be respectively the some of following azoic coupling component structure:
The preparation method of the bilayer light conductor of above-mentioned lamination type is characterized in that comprising following process: the methanol solution of pure dissolubility polyamide 0.5-2% is coated on the clean conductive substrates, and its thickness of dry back is about 0～1 μ m; Be coated with charge generation layer (CGL) solution then thereon, described CGL solution is by above-mentioned composite optical material and polyvinyl butyral resin are dispersed in tetrahydrofuran or butanone and the cyclohexanone equal-volume mixed solvent according to 2: 1 ratio of weight ratio, adding diameter is the powerful mechanical raking of zirconium pearl, the grinding 3h of 1mm, separate the zirconium pearl and get, total concentration is 20-50g/L.Dry back charge generation layer thickness is about 0.5～15 μ m; Then be coated with charge transport layer (CTL) solution thereon again, described CTL solution is to be dissolved in the ethylene dichloride by weight 1: 1 by any above-mentioned charge transport materials and polycarbonate resin, and the solution resin concentration of final preparation is 10%.Dry back charge transfer layer thickness is about 5～25 μ m, and the device room temperature ageing in drying box with gained at last promptly got the lamination type bilayer light conductor more than 10 hours.
The invention has the advantages that applied bisdiazo class complex light conducting material photosensitivity is good, not only the dark-decay rate is little for prepared lamination type bilayer light conductor, and rest potential is low, and light sensitivity is good.
Description of drawings
Fig. 1 is the structural representation of lamination type bilayer light conductor of the present invention.
Among the figure: 1 is conductive basal layer, and 2 is the restraining barrier, and 3 is charge generating layer, and 4 is charge transport layer.
Embodiment
(1) preparation of lamination type bilayer light conductor
(1) preparation of charge generation layer (CGL) solution
To contain 3,8-2 (2-hydroxyl-3-formyl is for aniline naphthyl-azo group)-xanthone, 3,8-2 (2-hydroxyl-3-formyl is for o-chloraniline naphthyl azo base) xanthone, the molecular level composite optical material and the polyvinyl butyral resin (1.5g) of 3-(2-hydroxyl-3-formyl is for aniline naphthyl-azo group)-8-(2-hydroxyl-3-formyl is for the adjacent chloronaphthyl, methylnaphthyl azo group of aniline)-three kinds of compounds of xanthone are dispersed in the tetrahydrofuran (100ml) according to 2: 1 ratio of weight ratio, adding diameter is the powerful mechanical raking of zirconium pearl of 1mm, grind 3h, gained solution is charge generation layer (CGL) solution, and is standby.Wherein azoic coupling component AS structure and 3-hydroxyl in the composite optical material-2-naphthalene formyl is 1: 4 for the mol ratio of o-chloraniline structure.
(2) preparation of charge transport layer (CTL) solution
Will be to diethylin phenylnaphthalene phenylhydrazone or 4-diphenylethyllene triphenylamine or 4,4 '-" the diphenylethyllene triphenylamine is dissolved in the ethylene dichloride as charge transport materials and the polycarbonate resin weight ratio by 1: 1 dimethyl-4; finally be mixed with resin concentration and be 10% solution, and is standby.
(3) preparation of lamination type bilayer light conductor
Adopt dip coating that the methanol solution (concentration 5%) of pure dissolubility polyamide is coated in the clean aluminium flake substrate, behind 110 ℃ of dry 1h; Adopt dip coating to be coated with charge generation layer (CGL) solution thereon, in 80 ℃ of dry 2h; At last, adopt dip coating to be coated with charge transport layer (CTL) solution thereon,, promptly obtain the lamination type bilayer light conductor in 80 ℃ of dry 10h, the about 0.5 μ m of precoated shet thickness wherein, the about 2 μ m of charge generation layer thickness, charge transport layer become the about 25 μ m of thickness.
(2) photoelectric properties of lamination type bilayer light conductor
Adopt the photoelectric properties of the SP-428 of Electric Co., Ltd of Japanese Kawaguchi type photoelectric properties tester test lamination type bilayer light conductor.Charging voltage is-5000V, white light exposure, and illumination 5Lx, 18 ℃ of temperature, humidity (RH) 30%, dark-decay time and time shutter are 4s.The result is as follows:
| Charge transport materials | Charging voltage (V) | Dark-decay rate (V/Sec) | Rest potential (V) | T 1/2 (s) | E 1/2 (lux.s) |
| 1 2 3 | 880 990 930 | 26.7 5 7.5 | 40 120 30 | 1.5 3.2 2.16 | 7.5 16 10.8 |
The photoelectric properties of optical conductor generally characterize by charging voltage, exposure current potential, dark-decay, rest potential, these five parameters of light sensitivity.Wherein charging voltage is meant the surface potential after optical conductor passes through the corona charging process, and its numerical value is high more, shows that the electric charge load capacity of optical conductor is strong; The dark-decay rate is meant the minimizing value of unexposed optical conductor surface voltage in the unit interval, and its numerical value is more little, and it is high more to show that optical conductor is possessed the electric charge ability; T
1/2Expression reduces needed time shutter of a half, E with the optical conductor surface voltage
1/2(T
1/2Product with exposure intensity) with the light sensitivity S=1/E of optical conductor
1/2Be the direct indicator of the photoelectric properties quality of optical conductor, E
1/2More little, S is big more, shows that the photoelectric properties of optical conductor are good more.It is generally acknowledged the E of optical conductor
1/2＜13lux.s or S＞0.077lux
-1.s
-1The time optical conductor photoelectric properties just very good.Therefore, prepared optical conductor has very high photosensitivity in the present embodiment, and high comprehensive performance.
(1) preparation of lamination type bilayer light conductor
(1) preparation of charge generation layer (CGL) solution
Use contains 3,8-2 (2-hydroxyl-3-formyl is for aniline naphthyl-azo group)-benzoxazoles, 3, (2-hydroxyl-3-formyl is for o-chloraniline naphthyl azo base) benzoxazole for 8-2, the molecular level compound substance of the bis-azo compound of 3-(2-hydroxyl-3-formyl is for aniline naphthyl-azo group)-8-(2-hydroxyl-3-formyl is for the adjacent chloronaphthyl, methylnaphthyl azo group of aniline) three kinds of structures of-benzoxazoles is as charge generating material, wherein azoic coupling component AS structure and 3-hydroxyl in the composite optical material-2-naphthalene formyl is 1: 4 for the mol ratio of o-chloraniline structure, prepares charge generation layer (CGL) solution with this.In clean aluminium flake substrate, be coated with precoated shet, charge generation layer and charge transport layer successively at last.Wherein, precoated shet thickness is that 1 μ m, charge generation layer thickness are that 10 μ m, charge transfer layer thickness are 15 μ m.
(2) preparation of charge transport layer (CTL) solution
With example 1
(3) preparation of lamination type bilayer light conductor
With example 1
(2) photoelectric properties of lamination type bilayer light conductor
Operation and condition are with case study on implementation 1 (two), and the result is as follows, shows that optical conductor prepared in the present embodiment has very high photosensitivity, and high comprehensive performance.
| Charge transport materials | Charging voltage (V) | Dark-decay rate (V/Sec) | Rest potential (V) | T 1/2 (s) | E 1/2 (lux.s) |
| 1 2 3 | 800 490 490 | 20 7.5 7.5 | 120 5 3 | 0.8 1 0.92 | 4 5 4.6 |
Claims (2)
1. the bilayer light conductor of a lamination type, this bilayer light conductor is by conductive basal layer, being followed successively by the precoated shet of thickness 0.5～1 μ m, the charge generating layer of thickness 0.5～15 μ m and the charge transport layer of thickness 5～25 μ m on the conductive basal layer forms, described conductive basal layer is metallic aluminium or copper, described precoated shet is pure dissolubility polyamide, it is characterized in that:
The compound that contains the following formula structure in the described charge transport layer is a kind of:
Contain two or more the Benzooxazole kind bisdiazo complex light conducting material shown in the following general formula I in the described charge generating layer:
Coupling group X in the general formula
1, X
2Be respectively the some of following azoic coupling component structure:
2. method for preparing the bilayer light conductor of the described lamination type of claim 1, it is characterized in that comprising following process: adopt dip coating, the methanol solution of pure dissolubility polyamide 0.5-2% is coated on the clean conductive substrates, and its thickness of dry back is 0.5～1 μ m; Be coated with the solution of charge generation layer then thereon, the solution of described charge generation layer is to adopt the molecular level composite optical material and the polyvinyl butyral resin of above-mentioned azo-compound to be dispersed in tetrahydrofuran or the butanone-cyclohexanone equal-volume mixed solvent according to 2: 1 ratio of weight ratio, adding diameter is the powerful mechanical raking of zirconium pearl, the grinding 3h of 1mm, separate the zirconium pearl and get, total concentration is 20-50g/L, and dry back charge generation layer thickness is 0.5～15 μ m; Then be coated with charge transport layer solution thereon again, described charge transport layer solution is to adopt any above-mentioned charge transport materials and polycarbonate resin to be dissolved in the ethylene dichloride by weight 1: 1, the solution resin concentration of final preparation is 10%, dry back charge transfer layer thickness is 5～25 μ m, device room temperature ageing in drying box with gained at last promptly got the lamination type bilayer light conductor more than 10 hours.
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| Application Number | Priority Date | Filing Date | Title |
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| CNB2005100143824A CN100359407C (en) | 2005-07-05 | 2005-07-05 | Laminated bilayer light conductor and its preparation method |
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| CNB2005100143824A CN100359407C (en) | 2005-07-05 | 2005-07-05 | Laminated bilayer light conductor and its preparation method |
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| CN100359407C true CN100359407C (en) | 2008-01-02 |
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| CN101887220B (en) * | 2009-05-12 | 2012-08-22 | 株式会社理光 | Electrophotographic photoconductor, and electrophotographic method, electrophotographic apparatus and process cartridge containing the electrophotographic photoconductor |
| CN102998919B (en) * | 2012-11-20 | 2014-05-14 | 宁波舜韵光电科技有限公司 | Production line coating process of organic photoconductor drum |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5139910A (en) * | 1990-12-21 | 1992-08-18 | Xerox Corporation | Photoconductive imaging members with bisazo compositions |
| CN1226911A (en) * | 1997-03-19 | 1999-08-25 | 株式会社上野制药应用研究所 | Condensed azo compound and process for producing the same |
| US6087055A (en) * | 1997-03-04 | 2000-07-11 | Ricoh Company, Ltd. | Electrophotographic photoconductor |
| JP2004361984A (en) * | 2004-09-27 | 2004-12-24 | Ricoh Co Ltd | Electrophotographic photoreceptor, electrophotographic method, electrophotographic system, and process cartridge for it |
-
2005
- 2005-07-05 CN CNB2005100143824A patent/CN100359407C/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5139910A (en) * | 1990-12-21 | 1992-08-18 | Xerox Corporation | Photoconductive imaging members with bisazo compositions |
| US6087055A (en) * | 1997-03-04 | 2000-07-11 | Ricoh Company, Ltd. | Electrophotographic photoconductor |
| CN1226911A (en) * | 1997-03-19 | 1999-08-25 | 株式会社上野制药应用研究所 | Condensed azo compound and process for producing the same |
| JP2004361984A (en) * | 2004-09-27 | 2004-12-24 | Ricoh Co Ltd | Electrophotographic photoreceptor, electrophotographic method, electrophotographic system, and process cartridge for it |
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