JPS58120260A - Electrophotographic receptor - Google Patents

Abstract

PURPOSE:To obtain a long-lived photoreceptor having characteristics hardly deteriorated by irradiation of UV rays, by adding a specified carbazole deriv. to a carrier transfer layer, and a specified triazole deriv. to the currier transfer layer and/or a carrier generating layer. CONSTITUTION:A carrier transfer layer contains a UV absorber represented by formulaIin which R1 is OH or alkyl, alkoxy, or amino each optionally substd. by CH3, OCH3, or the like; R2 is H, halogen, OH, or alkyl, alkoxy, or amino, each optionally substd. by methyl, ethoxy, or the like; and R3 is aryl or heterocyclic each optionally substd. This layer or a carrier generating layer contains as a UV absorber a triazole deriv. having formula II in which R4 is H, halogen NO2, or alkyl or aryl, each optionally substd., and R5, R6 are each H or alkyl or aryl, respectively optionally substd. by methyl, tertiary butyl, or the like. The carrier transfer layer contains the benzotriazole deriv. by 0.1- 20wt% of the carbazole deriv., and consequently, a photoreceptor high in photosensitivity, low in deterioration of characteristics due to UV irradiation, and high in durability can be obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an electrophotographic photoreceptor, and more particularly to an electrophotographic photoreceptor having a carrier transport layer combined with a material layer that absorbs light and generates electrostatic carriers.

To date, carrier-like organisms that absorb visible light and generate electrokinetic carriers (hereinafter simply referred to as "carriers") have been developed.
Hereinafter referred to as lGGMJ. ) containing a carrier generation layer (hereinafter referred to as ``CGL''), and a carrier transport material front (hereinafter referred to as ``CGL'') that transports either or both of positive and negative carriers generated in this CGL. A carrier transport collapse (hereinafter referred to as ``0TL
It's called J. ), it has been proposed to increase the photoreceptor IW k h 6 of a 14-photoreceptor. In this way, by assigning the two fundamental functions of carrier generation and transport, which are also necessary for light production, to another word, the range of materials that can be used in the composition of the photosensitive layer is expanded. In addition, it becomes easy to independently select a material or material system that best fulfills each function, and by doing so, it is possible to obtain the various characteristics required in the electrophotographic process, for example. It becomes possible to construct an electrophotographic photoreceptor having excellent characteristics such as a static potential, high electric holding ability, high photosensitivity, and high stability in repeated use.

Conventionally, as such a photosensitive layer, the following ones are known, for example.

(1) CGL made of amorphous selenium or sulfur cadmium
and an OTL made of poly-N-vinylcarbazole are set as a seed layer.

(2) 0GL made of amorphous selenium or sulfur cadmium
- and an OTL containing 2,4.7-dolinitro-9-fluorenone.

(3) A structure in which an OGL made of a perylene derivative and an OTL having three oxadiazole derivatives are laminated (see US Pat. No. 8,871,882).

(4) CT containing OGL consisting of chlordiane blue or methylscalyllium and a pyrazoline derivative
A structure in which L is laminated (see Japanese Patent Laid-Open No. 51-90827).

(5) A structure in which OGL made of amorphous selenium or its alloy and OTL containing a polyarylalkane aromatic amino compound are laminated (Japanese Patent Application No. 52-147!
Specification No. 51).

(6) CGL containing a perylene derivative and CTL containing a polyarylalkane thread aromatic amino compound
W4 structure (Japanese Patent Application No. 19907/1983).

As described above, there are many types of photosensitive layers of this type of citron, and in conventional electrophotographic photoreceptors having such photosensitive layers, the photoreceptor is exposed to sunlight or fluorescent lamps during maintenance or paper jam treatment. In this case, the photoreceptor may be exposed to sunlight or ultraviolet rays from a fluorescent lamp, causing its properties to deteriorate.
It has the disadvantage that the I-reality decreases.

For this reason, for the purpose of preventing deterioration of characteristics due to ultraviolet rays, for example, Japanese Patent Application Laid-Open No. 56-33652 discloses an electrophotographic photoreceptor containing triarylmethane and benzotriazole. JP-A-56-52756 discloses an electrophotographic photoreceptor containing biphenylamine and benzotriazole, and JP-A-56-52756 discloses an electrophotographic photoreceptor containing biphenylamine and diarylmethane or triarylmethane. It has been disclosed,
In these examples, the effect of preventing the deterioration of characteristics due to ultraviolet rays can be recognized, but the degree of the effect is so small that it is impractical.

It is an object of the present invention to eliminate the above-mentioned drawbacks and to provide an electrophotographic photoreceptor that shows little deterioration in characteristics even when irradiated with ultraviolet rays, and therefore has high durability for practical use.

The electrophotographic photoreceptor of the present invention is characterized by:
A support, and OGL and OGL provided on the conductive support.
a photosensitive layer consisting of a laminate of TL, the OTL contains a carbazole derivative represented by the following general formula (I), and at least one of the OTL or OGL is a benzene compound represented by the following general formula (1). The point is that it contains a triazole derivative.

General formula [C] 1 (In the formula, R represents a substituted or unsubstituted aryl group, and R2 is a hydrogen atom, a halogen atom, a substituted or unsubstituted alkyl acid, an alkoxy group, an amino group, a substituted amino acid, or a water R3 represents a substituted or unsubstituted aryl group or a substituted or unsubstituted heavy atom.) In formula 1, R4 is a hydrogen atom, a halogen atom, III
It represents a substituted or unsubstituted alkyl acid, an aryl group, or a diF group, and R5 and R6 each represent a hydrogen atom, a tIt-pinned or unsubstituted alkyl acid, or an aryl group. ) That is, in the present invention, the lucarhazole derivative represented by the general formula CI) is used as an OTM to form (3T) of the photosensitive layer.
In addition to containing the benzotriazole derivative represented by the above general formula [Gu] as an ultraviolet absorber in OTL.
CGL is added to one or both surfaces of CGL
By combining with GM-, carrier generation and transport are performed by separate substances, so-called! A photosensitive layer of an M-type photoreceptor is formed. And with this,
It is possible to provide an electrophotographic photoreceptor RTM with high durability against ultraviolet rays.

Specific examples of the carbazole derivatives represented by the n+1 general formula [E] that can be effectively used in the present invention include those having the following IIf # formula, but of course they are not limited to these. isn't it.

false convex type (1) [8] [4] (I-6) [I-7] [I-8] [l-1i:] (I-IJ) (I-183 [l-14] SuLi fl 3 CI-15) (I-1?) a, c”:; 02H.

(J to M, base [:I-g4] Cl-25) (I-2!tl) (I-27) (I-!8) [knee 29] (I-30) [l-31] [l -812] As an example of a benzo ε lyazole derivative σ) that is effectively used in the general formula (indicated by In, given in 4171 of the present invention), for example, a member σ] having the following structure However, the present invention is not limited to these examples.

[16] ] [19] Next, the mechanical formation of the electrophotographic photoreceptor of the present invention will be explained.

In one example of the present invention, as shown in FIG. 1, a CGL 2 containing GGM as a main component, which will be described later, is formed on a conductive support 1, and a CGL 2 containing GTM, which will be described later as a main component, is formed on this OGLg. The photosensitive layer 4 is formed by forming one IJ layer of 0TL8 comprising 0GL2 and 0TL3.

Examples of the materials of the conductive support 1 include GJ aluminum, nickel, -1 zinc, palladium, silver, indium, tin, platinum, gold, stainless steel, and KPGL.
A gold sheet such as the following can be used. However, the invention is not limited to these, and for example, as shown in FIG. The body material is suitably flexible, such as paper or plastic sheet F, and has sufficient strength against stress such as bending and bending. The conductor IICM 11B can also be provided by laminating gold sheets or vacuum depositing gold, or by other methods.

The CGL2 can be formed by OGM alone, which will be described later, by adding an appropriate binder resin to it, or by adding O'l'M, which is a substance that has high mobility for carriers of specific or non-specific polarity. It can be formed by

Specific methods include a method in which OGM is deposited on the support, and a method in which OGM is dissolved or fractionated in an appropriate solvent and coated and dried.

In this latter method, (3GL2 can be made to contain a benzotriazole derivative used as an ultraviolet absorber in the present invention. In this case, the content ratio of benzotriazole derivative m form to 0GL2 is 0.1
It is preferable that the content is 1 to 10% by weight, particularly 1 to 10% by weight.By doing so, the ultraviolet absorption effect can be increased and the deterioration of OGM due to ultraviolet rays can be effectively prevented. When the content of the benzocyriazole derivative is less than 0.1% by weight, a sufficient effect of preventing UV deterioration cannot be obtained, and when it exceeds 20% by weight, the sensitivity decreases. In this case, a binder resin or OTM may be added to OGM, and in that case,
GGM: Binder resin: (3-fold M-) is 1:0 to 100:0 to 500 in Ekihi, especially 1:0 to 10:0 to
Preferably, it is 50.

As OGM, as long as it absorbs visible light and generates free carriers, pigment-free and organic colored OGMs can be used. Amorphous selenium, tricrystalline selenium, selenium-arsenic metal, selenium-tellurium alloy, sulfur (hycadmium, cadmium selenide, (bo1 cadmium selenide,
Organic pigments such as mercury sulfide, sulfuric lead, inorganic pigments such as sulfide, and the following representative examples may also be used.

(1) Azo dyes such as 27 dyes, polyazo dyes, gold-complex azo dyes, pyrazolone azo dyes, stilbene dyes and thiazole azo dyes; (2) Perylene-based dyes such as perylene anhydride and perylene imide Pigment (3) anthraquinone derivative, anthanthrone derivative, dibenzpyrenequinone derivative, vilantrone derivative,
Anthraquinone or 4-quinone dyes such as violanthrone derivatives and isobiquinone derivatives (4) Indigoid yarn dyes such as indigo conductors and thioindigo derivatives (5) Gold-7 thalocyanine and gold-free phthalocyanine, etc. 7 Talocyanine dyes (6) Carbonium dyes such as diphenylmethane dyes, triphenylmethane dyes, xanthine dyes and acridine dyes (7) Quinoneimine dyes such as azine dyes, oxazine dyes and thiazine dyes (8) Cyanine dyes and methine dyes such as azomethine dyes (9) quinoline dyes (10) di-Japanese dyes (111 nitroso dyes (recognized) benzoquinone and 7-toquinone dyes (13) 7-talimide thread dyes (14) bisbenzimidazole Perinone dyes such as island conductors (quinacridone dyes) Among these organic dyes, particularly polycyclic quinone dyes are used in the present invention (they bond well with the carbazole derivative used as triple M and provide high sensitivity). It is preferable to do so.

Also, binder 1r can be included in CGL.
f is, for example, polyethylene, polypropylene, acrylic resin, methacrylic resin f'M, salted vinyl resin, vinyl acetate resin, epoxy resin, polyurethane, phenol I, polyester, alkyd resin, polycarbonate resin. , silicone resins, melamine resins, addition polymerization type resins, car-adding type 461 resins, polycondensation type resins, and copolymers containing two or more of the -return units of these resins. Saltf
In addition to insulating resins such as anhydrous maleic acid copolymer resin, polymeric organic semiconductors such as poly-N-vinylcarbazole can be used.

As the OTM having high mobility for carriers of specific or non-specific polarity that can be added to the CGL, CTM used in the configuration of 0TL8 etc. in the present invention can be used as a part or whole thereof, or electrophotographic photosensitive Other CTMk may be used in consideration of the performance as a whole.

Historically, this CGL has improved sensitivity, remaining 1M 1st place or anti-O
For the purpose of reducing fatigue when using II, a portion or two or more of three Lewis acids may be provided.

Examples of such Lewis rebellions include succinic anhydride, maleic anhydride, dibromaleic anhydride, tetrachloride anhydride, tetrabromide anhydride, and tetrabromide anhydride.
Taru brew, 8-nitro anhydrous 7 taru, 4-nitro anhydrous 7 taru version, anhydrous pyromellitic brew, mellitic anhydride, tetracyanoethylene, tetracyanoquinodimethane, 0-dinitrobenzene, m-dinitrobenzene, l, 3 .5-) Dinitrobenzene, paranitrobenzonitrile, picryl chloride, quinone chlorimide, chloranil, fluoranil, dichlorodicyanobarabenzoquinone, anthraquinone, dinitroanthraquinone, 2゜7-sinitrofluorenone, 2.4.7-dolinitro Fluorenone, 2
, 4,5.7-titranitrofluorenone, 9-fluorenylidene [dicyanomethylenemalonodinitrile],
Polynitro-9-fluorenylidene [dicyanomethylenemalonodinitrile], picric acid, o-nitroben, frog pea, p-nitrobenzojo, 8.5-dinitrobenzojo, pentafluorobenzoic acid, 5 -Nitrosalinal rod, 8
, 5-dinitrosalicylic acid, 7-thalene, Merit-1
Other compounds with high electron affinities can be inhibited.

The thickness of the 0GL2 formed as described above is preferably 0.005 to 20 microns, particularly preferably 0.
．． 05-5 microns. If it is less than 0.005 micron, sufficient photosensitivity cannot be obtained, and if it exceeds 20 micron, sufficient charge retention property cannot be obtained. It can be formed by applying and drying a coating solution obtained by dissolving or fractionating in water, or by other methods.

Robylene, acrylic resin, methacrylic IIm 1m,
IfIllll table type resins such as chloride vinyl packing fat, vinegared vinyl resin, epoxy resin, polyurethane resin, phenol resin IJh, polyester super resin, alkyd resin, polycarbonate resin, silicone resin, melamine 1/M resin, heavy weight Fill-type resins, polycondensation-type resins, and coelectrolyte resins containing two or more repeating units of these resins, such as vinyl chloride-vinyl acetate coelectrolyte-fat, vinyl chloride-vinyl acetate-maleic anhydride In addition to insulating resins such as copolymer resins, sieve molecular organic semiconductors such as BoIJ-N-vinylcarbazole can be used.

This OTL3 can contain a benzotriazole derivative used as an ultraviolet absorption side in the present invention. In this case benzotriazole in CTL3,
18211 iii cals? <Iris to Solume conductor; #i ratio is 0.1 to 20*-≦, especially 1 to 10 M
%, and by doing this, ultraviolet &!
@ CTM's ultraviolet 4il can increase the absorption effect! Inferiority caused by j can be reliably prevented. If the content of this benzotriazole derivative is less than 0.1% of fine wrinkles, a sufficient effect of preventing the deterioration of ultraviolet rays cannot be obtained, and if it exceeds 2% of fine wrinkles, li! ! ! Vomited once.

In the present invention, the content ratio of the binder resin and Cal/(V-ru derivative used in (3TL) is as follows:
Carbazole derivative 20-400 for 100 true birth capital
The car size is preferably 50 to 200 cars.

In the present invention, OTL has the same sensitivity and remains (\!
and anti-a (for the purpose of significantly reducing fatigue during use,
It is also possible to contain a Lewis acid similar to iii.

In this case, the content is OTM100 weight 11 Ling (
to 0.001 to 10 parts of Lewis acid, preferably 0.001 to 10 parts of Lewis acid. O1 to 5 are densely packed. Below 0.001 M, the increase in the image background potential (white paper potential) is large, and beyond the 1O overlapped area, the image potential (black M W, position) drops significantly and both are stable repetition +Ft' l: I can't get it.

The thickness of GTL 3 formed in this way is 2~
100 microns, preferably 5-80 microns.

The present invention has been described above according to the specific example shown in FIG. It is sufficient to publish five derivatives, and the mechanical structure of the electrophotographic photoreceptor can be modified.

For example, as shown in FIG. 8, 0GLz may be formed on a conductive support l by placing it in a suitable medium 1m5' through cholera, and C and TL8 may be formed on this 0GLZ. This intermediate layer 5 contains @at, which prevents a carrier from being injected into the photosensitive layer 4 from the conductive support 1 when the photosensitive layer 4 is exposed, or which prevents the photosensitive layer 4 from being injected into the photosensitive layer 4 from the conductive support. It can be made to function as an adhesive layer that can be integrally bonded. 14r+Karu intermediate PpI
The materials of 5 include aluminum oxide, gold such as indium, acrylic resin, methacrylic resin, and salt f.
Hivinyl resin, vinyl acetate resin, epoxy resin, polyurethane (Tsubaki: fat, phenol resin, polyester resin, alkyd resin, polycarbonate) & fat, silicone resin,
Melamine fat, vinyl chloride-vinyl acetate copolymer resin,
Other molecular materials such as vinyl-vinyl acetate-anhydrous maleic combination resin can be used.

Further, as shown in FIG. 4, on the conductive support 1, 1411
0TLa via or without IbIIv5
lliXL, 3GL2 may be formed on this 0TLa to produce photosensitive IYI4.

In the above, 'vNw of 0GL2 and O'l'L8
It is also effective to include a benzotriazole derivative in i.

Since the pendulum copy kt=nine body of the present invention has the above configuration, as can be understood from the preferred embodiments, it acts as a benzotriazole derivative or ultraviolet #@ abrasion (3
The deterioration caused by GM and <3TM ultraviolet rays can be prevented, and therefore the properties of the carbazole derivative used as OTM can be developed well, and medical properties can be obtained.

That is, according to the photoreceptor of the present invention, even if the photoreceptor is irradiated with ultraviolet rays during maintenance or paper jam treatment, the image quality is 1 [! l
I-images can be stably obtained over a period of time, and extremely long durability can be obtained.

Although it is not clear why the Kameko photographic photoreceptor of the present invention can stably obtain good characteristics over a long period of time, it is clear that the ultraviolet eI of benzotriazole derivatives and carbazole derivatives is
It is presumed that this is because the absorption spectra overlap greatly, and one benzotriazole derivative does not act as a lapping agent for the carrier.

FIG. 5 shows carbazole derivatives represented by the structural formula [l-14] and benzotriazole derivatives represented by the 114M formula (11-6') according to the present invention, and conventionally used triarylmethane (comparative example 5 described later). ), and shows the ultraviolet absorption spectra for each of the curves kf
The curve f2 is a carbazole derivative represented by the formula [l-14'), the curve f2 is a benzotriazole derivative represented by the formula (II-6), and the curve f3 is a triarylmethane. From this figure, the ultraviolet absorption spectra of the carbazole derivative represented by the one-tooth formula [Nie 14] and the benzotriazole derivative represented by the 1116 formula (Il-6) are in good agreement;
It can be seen that the deterioration of the 1ltj 4 form can be effectively prevented by adding the benzotriazole derivative. In the case of triarylmethane, 4j JIIJ
The absorption band overlap with the lupesol derivative is small, and the effect of preventing deterioration is small.

Examples of the present invention will be described below, but the present invention is not limited thereto. An intermediate layer with a thickness of about 0.05 microns made of a combination of vinyl chloride, vinyl acetate, and maleic anhydride [Eslec MF-10J (4111 Hyokaji] - manufactured by Gyosha) is provided, and 2 to 8
In a vacuum atmosphere of X 10 Torr, +
The quinone thread pigment 4,IO-dibromanthanthrone [Monolite Red 2YJ (0,I.

A39800 1. (3.1, made by the company) at a temperature of 50”c
The mixture was heated for 3 minutes to evaporate and deposited on the mesodia to form a CGL with a thickness of about 0.5 microns.

On the other hand, a carbazole derivative 11.25 of the 1M formula Cl-24), a benzotriazole derivative 0.249 of the pseudotooth formula [11-6:1] and a polycarbonate resin Panlite L-1250J (Seiki Kasei Co., Ltd. (manufactured by) 15
9 and 1,2-dichloroethane were dissolved in 100% of 1,2-dichloroethane, and applied onto the obtained OTL-forming CGL using a doctor blade, and dried at a temperature of 80°C for 1 hour to obtain a 12-micron thick film. An OTL was formed, thereby producing an electrophotographic photoreceptor of the present invention. This will be referred to as "Sample 1".

Furthermore, 1,2-dichloroethane was added to the above CTL forming solution to dilute it 10 times, and the resulting solution was coated on a quartz glass plate by a spin coating method to give an absorption spectrum of about 0.1 micron. /Measurement river trial was created. This is l-l1
! "Standard sample 1".

Example 2 An OTL having a thickness of 12 microns was formed in the same manner as in Example 1, except that a benzotriazole derivative represented by the one-tooth formula (II-7) was used, and thus an electrophotographic photoreceptor of the present invention was prepared. was prepared. This will be referred to as "Sample 2."

A sample for absorption spectrum measurement was operated in the same manner as in Example 1. This will be referred to as "measurement V sample 2."

Example 8 An OTL having a thickness of 12 microns was formed in the same manner as in Example 1, except that a carbazole derivative represented by structural formula (I-14) was used, and an electrophotographic photoreceptor of the present invention was thus prepared. Created. This will be referred to as "Sample 8."

A sample for absorption spectrum measurement was prepared in the same manner as in Practical Example 1. This will be referred to as "measurement sample 8."

Practical IItlI Example 1 On a conductive support provided with the same intermediate layer as in Example 1, an OTL with a thickness of 12 microns was formed using the same CTL forming solution as in Example 1.

On the other hand, polycarbonate resin [Panlite L-1/25
0J (serious Kasha 111 [-) 2 g and Uzuyabu style (I-
24) and 1 g of the carbazole derivative represented by the structural formula (I
l-6] benzotriazole m conductor 0.29
was dissolved in 100% of 1,2-dichloroethane, and 0.6% of 4,10-dibromanthanthrone was added to the resulting bath solution.
Ultrasonic dispersion was performed with g set to υ0, and the resulting dispersion was applied onto the OTL to form an OGL with a thickness of 2 microns, thereby producing an electrophotographic photoreceptor of the present invention. This will be referred to as 1 sample 4.

Comparative Example 1-4 Comparative electrophotographic photoreceptors were prepared in the same manner as in Examples 1-4 except that the benzotriazole derivative was not used in each of Examples 1-4. These are referred to as "comparative sample 1" to "comparative sample 4", respectively.

Comparative Example 5 The following w was used instead of the carbazole derivative in Example 1.
An electrophotographic AF light body for comparison was prepared in the same manner as in Example 1 (2) except that t-realylmethane represented by formula i was used.

This will be referred to as "comparative sample 5."

Samples for absorption spectrum measurement were prepared in the same manner as in Examples 1 to 3. These are respectively referred to as "comparative measurement sample 1" to "comparative measurement sample 8."

Samples 1-4 and Comparative Samples 1 to 5 according to the above Examples and Comparative Examples were mounted on an "Electrometer Model 5P-428" (manufactured by Kawaguchi 11 Sho Seisakusho), and their electrophotographic properties were measured using a dynamic method. That is, the surface potential vA (v) when charged at a charging potential of -6.0 kV is about th11kL V, t-500m Kara 50 (V)! Corridor light @ K5o (jux-seo) and a that are essential for T attenuation
o (lux-sec) Residual potential VR (V
) was measured.

Next, in order to examine the stability against ultraviolet rays, sample 1-4
And in each of Comparative Samples 1 to 5, silver [1'-8H
Light was irradiated from L-100UVJ (Tokyo Shibaura wo Keisha PA) for 60 seconds at a distance of 5 ell, and then the same measurements as above were performed again. The results are shown in Table 1.

From the results in Table 1, the characteristics of Samples 1-4 according to the present invention did not change even after being irradiated with ultraviolet rays, and the initial good characteristics were stably maintained, but Comparative Sample 1 -5, the characteristics changed significantly when exposed to ultraviolet irradiation, and the initial good characteristics could not be maintained.

Furthermore, using the “880 type spectrophotometer” (newly manufactured by Hitachi),
The ultraviolet absorption spectrum was measured for each of the measurement samples 1 to 8 and comparative measurement samples 1 to 8 obtained in Examples 1 to 8 and Comparative Example 1 to 8, and the absorbance ABS 1 at a wavelength of 888 nm was determined.

Next, light was irradiated in the same manner as above using the same ultra-high pressure mercury lamp as above, and then the ultraviolet absorption spectrum was measured again to determine the luminous intensity ABI at a wave of 1 aasnm. From this, the ratio ABS2/ABSI between ABS 2 and ABSI was determined. The results are shown in Table 2.

As is clear from the Examples and Comparative Examples shown in Table 2 and above, the electrophotographic photoreceptor samples of this 56-day light show less change in characteristics such as acceptance potential, sensitivity, and residual potential due to ultraviolet light irradiation than the comparative samples, and furthermore, the absorption spectrum changes. It is understood that there are few changes and it exhibits vague stability.

[Brief explanation of the drawing]

FIG. 1 is an explanatory cross-sectional view showing an example of the structure of the electrophotographic photoreceptor of the present invention, FIG. 2 is an explanatory cross-sectional view showing another example of the electrophotographic photoreceptor of the present invention, and FIGS. 8FyJ and 4 6 are explanatory cross-sectional views showing still other examples of the electrophotographic photoreceptor of the present invention, and FIG. It is a line diagram showing the ultraviolet absorption spectrum in each. 1... Conductive support 2... Carrier generation layer (CGL) 8... Carrier transport layer (OTL) 4...
・Photosensitive layer 5...Intermediate layer IA...Insulating substrate IB...Conductive layer, -+ 乍Figure 1'JP2Figure'$3Decoy #5Figure Deeply roasted (nm)

Claims (1)

[Scope of Claims] 1) A conductive support, and a photosensitive layer provided on the conductive support and comprising a carrier generation layer and a carrier transport layer, the carrier transport layer having the following properties: General formula CI)
Ichikosha I4 photoreceptor, which contains a carpezole connecting conductor represented by the following, and at least one of the carrier N-containing layer or the carrier generation layer contains a benzotriazole derivative represented by the following general formula (It). . General formula [Engine] 1 (wherein, R1 represents a substituted or non-substituted aryl, and R2 represents a hydrogen atom, a halogen atom, a directly substituted or non-substituted alkyl group, an alkoxy group, an amino group, li! 7
R3 represents a substituted or uncooperative aryl machine or a substituted or non-cooperative aryl machine. ) General formula (It) I (wherein R1 represents a water ≠ atom, a halogen atom, a substituted or unsubstituted alkyl group, an aryl group, or a nitro group, and R5v and R6 each represent a hydrogen atom, fIi substituted or non-t
Represents an alkyl or aryl group of t*. 2) The carrier transport layer contains the benzotriazole derivative listed above, and the content ratio of the benzotriazole derivative listed above to the carbazole derivative listed above in the carrier transport layer is 0.1 to 20%. The electrophotographic photoreceptor according to scope 1. 3) The electrophotographic photosensitive material according to claim 1, wherein the carrier generation layer contains the benzotriazole derivative, and the content of the benzotriazole derivative in the carrier generation layer is 0.1 to 20%. body.