JPH0756367A - Electrophotographic photoreceptor - Google Patents

Electrophotographic photoreceptor

Info

Publication number
JPH0756367A
JPH0756367A JP20676393A JP20676393A JPH0756367A JP H0756367 A JPH0756367 A JP H0756367A JP 20676393 A JP20676393 A JP 20676393A JP 20676393 A JP20676393 A JP 20676393A JP H0756367 A JPH0756367 A JP H0756367A
Authority
JP
Japan
Prior art keywords
charge
layer
photosensitive layer
compd
photoreceptor
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP20676393A
Other languages
Japanese (ja)
Inventor
Mikio Yamazaki
幹夫 山崎
Masayo Amano
雅世 天野
Masami Kuroda
昌美 黒田
Osamu Nabeta
修 鍋田
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fuji Electric Co Ltd
Original Assignee
Fuji Electric Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Fuji Electric Co Ltd filed Critical Fuji Electric Co Ltd
Priority to JP20676393A priority Critical patent/JPH0756367A/en
Publication of JPH0756367A publication Critical patent/JPH0756367A/en
Pending legal-status Critical Current

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  • Photoreceptors In Electrophotography (AREA)

Abstract

PURPOSE:To obtain an electrophotographic photoreceptor for copying and for a printer having high sensitivity and excellent in repetitive characteristics by incorporating a styryl compd. as an electric charge transferring material into a photosensitive layer. CONSTITUTION:Electrophotographic characteristics can be improved by using a compd. having a specified skeleton represented by general formula I (where each of R<1>-R<8> is H, alkyl or aryl and Ar<1> is aryl or a heterocyclic group) or general formula II (where each of R<9>-R<12> is H, alkyl or aryl and Ar<2> is aryl or a heterocyclic group) as an electric charge transferring material. A proper material may be selected as an electric charge generating material in accordance with the kind of a light source for exposure. For example, when a phthalocyanine compd., a squarylium compd. or a bisazo compd. is used, a photoreceptor usable in a semiconductor laser printer is obtd.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】この発明は電子写真用感光体の感
光層に係り、特に感光層に用いられる電荷輸送物質に関
する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a photosensitive layer of an electrophotographic photoreceptor, and more particularly to a charge transport material used in the photosensitive layer.

【0002】[0002]

【従来の技術】従来より電子写真用感光体(以下感光体
とも称する)の感光材料としてはセレンまたはセレン合
金などの無機光導電性物質、酸化亜鉛あるいは硫化カド
ミウムなどの無機光導電性物質を樹脂結着剤中に分散さ
せたもの、ポリ−N−ビニルカルバゾールまたはポリビ
ニルアントラセンなどの有機光導電性物質、フタロシア
ニン化合物あるいはビスアゾ化合物などの有機光導電性
物質を樹脂結着剤中に分散させたものや真空蒸着させた
ものなどが利用されている。
2. Description of the Related Art Conventionally, as a photosensitive material for an electrophotographic photoreceptor (hereinafter also referred to as a photoreceptor), an inorganic photoconductive substance such as selenium or a selenium alloy, or an inorganic photoconductive substance such as zinc oxide or cadmium sulfide is used as a resin. Those dispersed in a binder, organic photoconductive substances such as poly-N-vinylcarbazole or polyvinylanthracene, and organic photoconductive substances such as phthalocyanine compounds or bisazo compounds dispersed in a resin binder And those that are vacuum-deposited are used.

【0003】また感光体には暗所で表面電荷を保持する
機能、光を受容して電荷を発生する機能、同じく光を受
容して電荷を輸送する機能とが必要であるが、一つの層
でこれらの機能をあわせもったいわゆる単層型感光体
と、主として電荷発生に寄与する層と暗所での表面電荷
の保持と光受容時の電荷輸送に寄与する層とに機能分離
した層を積層したいわゆる積層型感光体がある。これら
の感光体を用いた電子写真法による画像形成には、例え
ばカールソン方式が適用される。この方式での画像形成
は暗所での感光体へのコロナ放電による帯電、帯電され
た感光体表面上への原稿の文字や絵などの静電潜像の形
成、形成された静電潜像のトナーによる現像、現像され
たトナー像の紙などの支持体への定着により行われ、ト
ナー像転写後の感光体は除電、残留トナーの除去、など
を行った後再使用に供される。
Further, the photoreceptor is required to have a function of retaining surface charges in a dark place, a function of receiving light to generate charges, and a function of receiving light to transport charges as well. Then, a so-called single-layer type photoconductor having these functions together, and a layer having a function separated mainly into a layer that contributes to charge generation and a layer that contributes to retention of surface charge in a dark place and charge transport during light reception. There is a so-called laminated type photoreceptor in which the layers are laminated. For example, the Carlson method is applied to the image formation by the electrophotographic method using these photoconductors. Image formation by this method is charging by corona discharge to a photoconductor in a dark place, formation of an electrostatic latent image such as characters and pictures of an original on the charged surface of the photoconductor, electrostatic latent image formed The toner is used for development, and the developed toner image is fixed on a support such as paper. After the toner image is transferred, the photosensitive member is subjected to static elimination, residual toner removal, and the like, and then reused.

【0004】近年、可とう性、熱安定性、膜形成性など
の利点により、電荷輸送能の優れた光導電性有機化合物
の感光体への応用が数多く提案されている。例えばオキ
サジアゾール化合物としては、米国特許第318944
7号明細書、ピラゾリン化合物としては、特公昭59−
2023号公報、またヒドラゾン化合物としては、特公
昭55−42380号公報、特開昭57−101844
号公報、特開昭54−150128号公報などにより種
々の電荷輸送材料が知られている。
In recent years, many applications of photoconductive organic compounds having excellent charge transporting ability to photoconductors have been proposed due to advantages such as flexibility, thermal stability, and film forming property. For example, as an oxadiazole compound, US Pat.
No. 7, as a pyrazoline compound, Japanese Patent Publication No. 59-
No. 2023, and as hydrazone compounds, JP-B-55-42380 and JP-A-57-101844.
Various charge-transporting materials are known from Japanese Patent Application Laid-Open No. 54-150128, and the like.

【0005】[0005]

【発明が解決しようとする課題】上述のように有機材料
は無機材料にない多くの長所を持つが、また同時に電子
写真用感光体に要求されるすべての特性を充分に満足す
るものが得られていないのが現状であり、特に光感度お
よび繰り返し連続使用時の特性に問題があった。この発
明は、上述の点に鑑みてなされたものであって、感光層
に電荷輸送物質として今までに用いられたことのない新
しい有機材料を用いることにより、高感度で繰り返し特
性の優れた複写機用およびプリンター用電子写真用感光
体を提供することにある。
As described above, the organic material has many advantages that the inorganic material does not have, but at the same time, an organic material sufficiently satisfying all the characteristics required for the electrophotographic photoreceptor can be obtained. However, there is a problem with the photosensitivity and the characteristics during repeated continuous use. The present invention has been made in view of the above points, and by using a new organic material which has never been used as a charge transport material in a photosensitive layer, it is possible to obtain a copy having high sensitivity and excellent repeatability. An object is to provide an electrophotographic photoreceptor for machines and printers.

【0006】[0006]

【課題を解決するための手段】この発明によれば前述の
目的は、感光層を有し、感光層は下記一般式 (I) で示
されるスチリル化合物のうち少なくとも一種電荷輸送物
質として含むこと、
According to the present invention, the above object has a photosensitive layer, and the photosensitive layer contains at least one charge transporting substance of a styryl compound represented by the following general formula (I):

【0007】[0007]

【化3】 [Chemical 3]

【0008】〔式中、Rn (n=1ないし8)は水素原
子、アルキル基または置換もしくは無置換のアリール基
を表し、Ar1 は置換もしくは無置換のアリール基また
は複素環基を表す。〕さらに感光層を有し、感光層は下
記一般式 (II) で示されるスチリル化合物のうち少なく
とも一種電荷輸送物質として含むことにより達成され
る。
[In the formula, R n (n = 1 to 8) represents a hydrogen atom, an alkyl group or a substituted or unsubstituted aryl group, and Ar 1 represents a substituted or unsubstituted aryl group or a heterocyclic group. This is further achieved by having a photosensitive layer, and the photosensitive layer containing at least one of the styryl compounds represented by the following general formula (II) as a charge transporting substance.

【0009】[0009]

【化4】 [Chemical 4]

【0010】〔式中、Rn (n=9ないし12)は水素
原子、アルキル基または置換もしくは無置換のアリール
基を表し、Ar2 は置換もしくは無置換のアリール基ま
たは複素環基を表す。〕さらには、感光層は電荷発生層
と電荷輸送層の積層されたものであることとする。
[In the formula, R n (n = 9 to 12) represents a hydrogen atom, an alkyl group or a substituted or unsubstituted aryl group, and Ar 2 represents a substituted or unsubstituted aryl group or a heterocyclic group. Furthermore, the photosensitive layer is a laminate of a charge generation layer and a charge transport layer.

【0011】[0011]

【作用】前記一般式 (I) あるいは (II) で示されるス
チリル化合物を感光層に用いた例は知られていない。こ
れら発明者は、前記目的を達成するために各種有機材料
について鋭意検討するなかで、これら化合物について数
多くの実験を行った結果、その技術的解明はまだ充分な
されてはいないが、このような一般式 (I) あるいは
(II) で示される特定の骨格を有する化合物を電荷輸送
物質として使用することが、電子写真特性の向上に極め
て有効であることを見出し、高感度で繰り返し特性の優
れた感光体を得るに至ったのである。
There is no known example in which the styryl compound represented by the general formula (I) or (II) is used in the photosensitive layer. These inventors have conducted a number of experiments on these compounds in the course of earnestly studying various organic materials in order to achieve the above-mentioned object, and as a result, their technical elucidation has not been sufficiently conducted. Formula (I) or
It was found that the use of a compound having a specific skeleton represented by (II) as a charge-transporting substance is extremely effective in improving electrophotographic properties, leading to the development of a photoreceptor having high sensitivity and excellent repeating properties. It was.

【0012】[0012]

【実施例】この発明に用いられる前記一般式 (I) ある
いは (II) で示される化合物の合成は公知の反応を行う
ことにより容易に得られる。例えば後述する化合物(I
−1)および(I−5)は下記の反応式に示す化合物
(a)と(b)とを用いて得られる。
EXAMPLES Synthesis of the compound represented by the general formula (I) or (II) used in the present invention can be easily obtained by carrying out a known reaction. For example, the compound (I
-1) and (I-5) are obtained by using the compounds (a) and (b) shown in the following reaction formulas.

【0013】[0013]

【化5】 [Chemical 5]

【0014】また化合物(II−1)は化合物(a)と
(e)とを用いて得られる。
The compound (II-1) can be obtained by using the compounds (a) and (e).

【0015】[0015]

【化6】 [Chemical 6]

【0016】前記一般式 (I) で示される化合物の具体
例を例示すると次の通りである。
Specific examples of the compound represented by the general formula (I) are as follows.

【0017】[0017]

【化7】 [Chemical 7]

【0018】[0018]

【化8】 [Chemical 8]

【0019】[0019]

【化9】 [Chemical 9]

【0020】前記一般式(II) で示される化合物の具体
例を例示すると次の通りである。
Specific examples of the compound represented by the general formula (II) are as follows.

【0021】[0021]

【化10】 [Chemical 10]

【0022】この発明の感光体は前述のようなスチリル
化合物を感光層中に含有させたものであるが、それら誘
導体の応用の仕方によって、図1、図2あるいは図3に
示した如くに用いることが出来る。図1はこの発明の実
施例にかかる単層型感光体を示す断面図、図2はこの発
明の実施例にかかる負帯電の積層型感光体を示す断面
図、図3はこの発明の実施例にかかる正帯電の積層型感
光体を示す断面図である。1は導電性基体、20、2
1、22は感光層、3は電荷発生物質、4は電荷発生
層、5は電荷輸送物質、6は電荷輸送層、7は被覆層で
ある。図1は、導電性基体1上に電荷発生物質3と電荷
輸送物質5を樹脂バインダー(結着剤)に分散した感光
層20(通常単層型感光体と称せられる構成)が設けら
れたものである。図2は導電性基体1上に電荷発生物質
3を主体とする電荷発生層4と、電荷輸送物質5である
化合物を含有する電荷輸送層6との積層からなる感光層
21(通常積層型感光体と称せられる構成)が設けられ
たものである。図3は図2の逆の層構成のものである。
この場合には、電荷発生層4を保護するため、さらに被
覆層7を設けるのが一般的である。
The photoreceptor of the present invention contains the above-mentioned styryl compound in the photosensitive layer. Depending on how the derivative is applied, it is used as shown in FIG. 1, FIG. 2 or FIG. You can 1 is a cross-sectional view showing a single-layer type photoconductor according to an embodiment of the present invention, FIG. 2 is a cross-sectional view showing a negatively charged laminated type photoconductor according to the embodiment of the present invention, and FIG. 3 is an embodiment of the present invention. FIG. 3 is a cross-sectional view showing a positively charged layered type photosensitive member according to the first embodiment. 1 is a conductive substrate, 20 and 2
Reference numerals 1 and 22 are photosensitive layers, 3 is a charge generating substance, 4 is a charge generating layer, 5 is a charge transporting substance, 6 is a charge transporting layer, and 7 is a coating layer. In FIG. 1, a photosensitive layer 20 (a structure usually called a single-layer type photoreceptor) in which a charge generating substance 3 and a charge transporting substance 5 are dispersed in a resin binder (binder) is provided on a conductive substrate 1. Is. FIG. 2 shows a photosensitive layer 21 (usually a laminated type photosensitive layer) formed by stacking a charge generation layer 4 mainly composed of a charge generation substance 3 and a charge transport layer 6 containing a compound which is a charge transport substance 5 on a conductive substrate 1. The structure called the body) is provided. FIG. 3 shows a layer structure opposite to that of FIG.
In this case, it is general to further provide a coating layer 7 to protect the charge generation layer 4.

【0023】図2および図3に示す2種類の層構成とす
る理由は、負帯電方式として通常用いられる図2の層構
成で正帯電方式で用いようとしても、これに適合する電
荷輸送物質がまだ見つかっておらず、従って正帯電方式
の感光体として現段階では図3に示した層構成とするこ
とが必要なためである。図1の感光体は、電荷発生物質
を電荷輸送物質及び樹脂バインダーを溶解した溶液中に
分散させ、この分散液を導電性基体上に塗布することに
よって作製できる。
The reason why the two types of layer structures shown in FIGS. 2 and 3 are used is that even if the layer structure shown in FIG. 2 which is normally used as a negative charging system is used in the positive charging system, a charge transport material suitable for this is used. This is because the layer structure shown in FIG. 3 is required at the present stage as a positive charging type photosensitive member. The photoreceptor of FIG. 1 can be prepared by dispersing a charge generating substance in a solution in which a charge transporting substance and a resin binder are dissolved, and applying this dispersion liquid onto a conductive substrate.

【0024】図2の感光体は、導電性基体上に電荷発生
物質を真空蒸着するか、あるいは電荷発生物質の粒子を
溶剤又は樹脂バインダー中に分散して得た分散液を塗
布、乾燥しその上に電荷輸送物質及び樹脂バインダーを
溶解した溶液を塗布、乾燥することにより作製できる。
図3の感光体は、電荷輸送物質及び樹脂バインダーを溶
解した溶液を、導電性基体上に塗布、乾燥しその上に電
荷発生物質を真空蒸着するか、あるいは電荷発生物質の
粒子を溶剤又は樹脂バインダー中に分散して得た分散液
を塗布、乾燥しさらに被覆層を形成することにより作製
できる。
The photosensitive member of FIG. 2 is obtained by vacuum-depositing a charge-generating substance on a conductive substrate, or by coating a dispersion obtained by dispersing particles of the charge-generating substance in a solvent or a resin binder and drying the dispersion. It can be prepared by applying a solution in which a charge-transporting substance and a resin binder are dissolved thereon and drying it.
In the photoreceptor of FIG. 3, a solution in which a charge transporting substance and a resin binder are dissolved is applied on a conductive substrate and dried, and the charge generating substance is vacuum-deposited thereon, or particles of the charge generating substance are dissolved in a solvent or a resin. It can be prepared by coating a dispersion obtained by dispersing in a binder, drying and further forming a coating layer.

【0025】導電性基体1は、感光体の電極としての役
目と同時に他の各層の支持体となっており、円筒状、板
状、フィルム状のいずれでもよく、材質的にはアルミニ
ウム、ステンレス鋼、ニッケルなどの金属、あるいはガ
ラス、樹脂などの上に導電処理をほどこしたものでもよ
い。電荷発生層4は、前述のように電荷発生物質3の粒
子を樹脂バインダー中に分散させた材料を塗布するか、
あるいは真空蒸着などの方法により形成され、光を受容
し電荷を発生する。またその電荷発生効率が高いことと
同時に発生した電荷の電荷輸送層6および被覆層7への
注入性が重要で、電場依存性が少なく低電場でも注入の
良いことが望ましい。電荷発生物質としては無金属フタ
ロシアニン、チタニルフタロシアニンなどのフタロシア
ニン化合物、各種アゾ、キノン、インジゴ顔料あるいは
シアニン、スクアリリウム、アズレニウム、ピリリウム
化合物などの染料や、セレンまたはセレン化合物などが
用いられ、画像形成に使用される露光光源の光波長領域
に応じて好適な物質を選ぶことができる。電荷発生層は
電荷発生機能を有すればよいので、その膜厚は電荷発生
物質の光吸収係数より決まり一般的には5μm以下であ
り、好適には1μm以下である。電荷発生層は電荷発生
物質を主体としてこれに電荷輸送物質などを添加して使
用することも可能である。樹脂バインダーとしては、ポ
リカーボネート、ポリエステル、ポリアミド、ポリウレ
タン、エポキシ、シリコン樹脂、メタクリル酸エステル
の重合体および共重合体などを適宜組合わせて使用する
ことが可能である。
The conductive substrate 1 serves not only as an electrode of the photosensitive member but also as a support for other layers, and may be cylindrical, plate-shaped or film-shaped, and is made of aluminum or stainless steel. A metal such as nickel, glass, resin, or the like that has been subjected to a conductive treatment may be used. The charge generation layer 4 is formed by applying a material in which particles of the charge generation substance 3 are dispersed in a resin binder as described above, or
Alternatively, it is formed by a method such as vacuum deposition and receives light to generate an electric charge. Further, it is important that the charge generation efficiency is high, and at the same time that the generated charge is injectable into the charge transport layer 6 and the coating layer 7 and that the electric field dependency is small and the injection is good even in a low electric field. As the charge generating substance, phthalocyanine compounds such as metal-free phthalocyanine and titanyl phthalocyanine, various azo, quinone, indigo pigment or dyes such as cyanine, squarylium, azurenium and pyrylium compounds, selenium or selenium compounds, etc. are used and used for image formation. A suitable substance can be selected according to the light wavelength region of the exposure light source used. Since the charge generating layer has only to have a charge generating function, its thickness is determined by the light absorption coefficient of the charge generating substance and is generally 5 μm or less, preferably 1 μm or less. The charge generation layer may be mainly composed of a charge generation material and a charge transport material may be added to the charge generation layer. As the resin binder, it is possible to use polycarbonate, polyester, polyamide, polyurethane, epoxy, silicone resin, a polymer or copolymer of methacrylic acid ester in an appropriate combination.

【0026】電荷輸送層6は樹脂バインダー中に有機電
荷輸送物質として前記一般式 (I)または (II) で示さ
れる化合物を分散させた塗膜であり、暗所では絶縁体層
として感光体の電荷を保持し、光受容時には電荷発生層
から注入される電荷を輸送する機能を発揮する。樹脂バ
インダーとしてはポリカーボネート、ポリエステルなど
の重合体および共重合体などを用いることができる。
The charge transport layer 6 is a coating film in which a compound represented by the above general formula (I) or (II) is dispersed as an organic charge transport substance in a resin binder. It retains an electric charge and exhibits a function of transporting an electric charge injected from the electric charge generation layer when receiving light. As the resin binder, polymers and copolymers such as polycarbonate and polyester can be used.

【0027】被覆層7は暗所ではコロナ放電の電荷を受
容して保持する機能を有しており、かつ電荷発生層が感
応する光を透過する性能を有し、露光時に光を透過し、
電荷発生層に到達させ、発生した電荷の注入を受けて表
面電荷を中和消滅させることが必要である。被覆材料と
しては、ポリエステル、ポリアミドなどの有機絶縁性皮
膜形成材料が適用できる。またこれら有機材料とSiO
2 などの無機材料さらには金属、金属酸化物などの電気
抵抗を低減せしめる材料とを混合して用いることもでき
る。被覆材料としては有機絶縁性皮膜形成材料に限定さ
れることはなくSiO2 などの無機材料さらには金属、
金属酸化物などを蒸着、スパッタリングなどの方法によ
り形成することも可能である。被覆材料は前述の通り電
荷発生物質の光の吸収極大の波長領域においてできるだ
け透明であることが望ましい。
The coating layer 7 has a function of receiving and holding a charge of corona discharge in a dark place, and also has a property of transmitting the light to which the charge generation layer is sensitive, and transmits the light at the time of exposure,
It is necessary to reach the charge generation layer and receive the injection of the generated charges to neutralize and eliminate the surface charges. As the coating material, an organic insulating film forming material such as polyester or polyamide can be applied. In addition, these organic materials and SiO
It is also possible to mix and use an inorganic material such as 2 or a material such as a metal or a metal oxide that reduces electric resistance. The coating material is not limited to the organic insulating film forming material, but an inorganic material such as SiO 2 or a metal,
It is also possible to form a metal oxide or the like by a method such as vapor deposition or sputtering. As described above, it is desirable that the coating material be as transparent as possible in the wavelength region of the maximum light absorption of the charge generating substance.

【0028】被覆層自体の膜厚は被覆層の混合組成にも
依存するが、繰り返し連続使用したとき残留電位が増大
するなどの悪影響がでない範囲で任意に設定できる。以
下、この発明の実施例について説明する。 〔実施例1〕x型無金属フタロシアニン(H2Pc)5
0重量部と前記化合物No. I−1で示される化合物1
00重量部をポリエステル樹脂(商品名バイロン20
0:東洋紡製)100重量部とテトラヒドロフラン(T
HF)溶剤とともに3時間混合機により混練して塗布液
を調整し、導電性基体であるアルミ蒸着ポリエステルフ
ィルム(Al−PET)上に、ワイヤーバー法にて塗布
して、乾燥後の膜厚が20μmになるように感光体を作
製した。 〔実施例2〕前記化合物No. I−2で示される化合物
80重量部とポリカーボネート樹脂(商品名パンライト
L−1225:帝人化成製)100重量部を塩化メチレ
ンに溶解してできた塗液をアルミ蒸着ポリエステルフィ
ルム基体上に、ワイヤーバー法にて塗布して、乾燥後の
膜厚が20μmになるように電荷輸送層を形成した。こ
のようにして得られた電荷輸送層上に、ボールミルによ
り150時間粉砕処理したチタニルフタロシアニン(T
iOPc)50重量部、ポリエステル樹脂(商品名バイ
ロン200:東洋紡製)50重量部、THF溶剤ととも
に3時間混合機により混練して塗布液を調整し、ワイヤ
ーバー法にて塗布して、乾燥後の膜厚が1μmになるよ
うに電荷発生層を形成し、感光体を作製した。 〔実施例3〕実施例2において、TiOPcに替えて下
記構造式(III) で示される化合物を用い、電荷輸送物質
を前記化合物No. I−3で示される化合物に替えて実
施例2と同様に感光体を作製した。
The film thickness of the coating layer itself depends on the mixed composition of the coating layer, but can be arbitrarily set within a range that does not have an adverse effect such as an increase in residual potential when repeatedly used continuously. Examples of the present invention will be described below. [Example 1] x-type metal-free phthalocyanine (H 2 Pc) 5
0 parts by weight and the compound No. Represented by I-1 Compound 1
00 parts by weight of polyester resin (trade name: Byron 20
0: 100 parts by weight of Toyobo and tetrahydrofuran (T
HF) Kneading with a solvent for 3 hours with a mixer to prepare a coating solution, which is applied by a wire bar method onto an aluminum vapor-deposited polyester film (Al-PET) which is a conductive substrate, and the film thickness after drying is A photoconductor was prepared so as to have a thickness of 20 μm. . EXAMPLE 2 The Compound No I-2 compound represented by 80 parts by weight of a polycarbonate resin (trade name: Panlite L-1225 of Teijin Chemicals Ltd.) coating solution to 100 parts by weight Deki was dissolved in methylene chloride A charge transport layer was formed on the aluminum vapor-deposited polyester film substrate by a wire bar method so that the film thickness after drying was 20 μm. On the charge transport layer thus obtained, titanyl phthalocyanine (T
50 parts by weight of iOPc), 50 parts by weight of polyester resin (trade name: Byron 200, manufactured by Toyobo), and a THF solvent are kneaded with a mixer for 3 hours to prepare a coating solution, which is coated by a wire bar method and dried. A charge generation layer was formed so that the film thickness was 1 μm, and a photoconductor was produced. [Example 3] The same as Example 2 except that the compound represented by the following structural formula (III) was used in place of TiOPc, and the charge transport material was replaced by the compound represented by the above compound No. I-3 . A photoconductor was prepared.

【0029】[0029]

【化11】 [Chemical 11]

【0030】〔実施例4〕実施例2において、TiOP
cに替えて例えば特開昭47−37543号公報に示さ
れるようなビスアゾ顔料であるクロロダイアンブルーを
用い、電荷輸送物質を前記化合物No. I−10で示さ
れる化合物に替えて実施例2と同様に感光体を作製し
た。
[Embodiment 4] In Embodiment 2, TiOP
For example, chlorodian blue, which is a bisazo pigment as disclosed in JP-A-47-37543, was used instead of c, and the charge transporting material was replaced with the compound represented by the above compound No. I-10 . Similarly, a photoconductor was prepared.

【0031】このようにして得られた感光体の電子写真
特性を川口電機製静電記録紙試験装置「SP−428」
を用いて測定した。感光体の表面電位Vs(V)は暗所
で+6.0kVのコロナ放電を10秒間行って感光体表
面を正帯電せしめたときの初期の表面電位であり、続い
てコロナ放電を中止した状態で2秒間暗所保持したとき
の表面電位Vd(V)を測定し、さらに続いて感光体表
面に照度2lxの白色光を照射してVdが半分になるま
での時間(s)を求め半減衰露光量E1/2 (lx・s)
とした。また照度2lxの白色光を10秒間照射したと
きの表面電位を残留電位Vr(V)とした。また実施例
1〜2については長波長光での高感度が期待できるの
で、波長780nmの単色光をもちいたときの電子写真
特性も同時に測定した。すなわちVdまでは同様に測定
し、次に白色光の替わりに1μWの単色光(780n
m)を照射し半減衰露光量(μJ/cm2 )を求め、ま
たこの光を10秒間感光体表面に照射したときの残留電
位Vr(V)を測定した。測定結果を表1に示す。
The electrophotographic characteristics of the photoconductor thus obtained were measured by the electrostatic recording paper testing apparatus "SP-428" manufactured by Kawaguchi Electric Co., Ltd.
Was measured using. The surface potential Vs (V) of the photoconductor is the initial surface potential when the surface of the photoconductor is positively charged by performing +6.0 kV corona discharge for 10 seconds in a dark place, and then in the state where the corona discharge is stopped. The surface potential Vd (V) when kept in the dark for 2 seconds is measured, and then the time (s) until Vd is halved by irradiating the surface of the photoconductor with white light having an illuminance of 2 lx is obtained and a half-attenuation exposure is performed. Quantity E 1/2 (lx ・ s)
And The surface potential when white light with an illuminance of 2 lx was applied for 10 seconds was defined as the residual potential Vr (V). In addition, since high sensitivity for long-wavelength light can be expected in Examples 1 and 2, electrophotographic characteristics when monochromatic light having a wavelength of 780 nm was used were also measured. That is, the same measurement is performed up to Vd, and then 1 μW monochromatic light (780 n
m) was applied to determine the half-attenuated exposure dose (μJ / cm 2 ), and the residual potential Vr (V) when the surface of the photoconductor was irradiated with this light for 10 seconds was measured. The measurement results are shown in Table 1.

【0032】[0032]

【表1】 表1に見られるように、実施例1〜4は半減衰露光量、
残留電位ともに良好であり、表面電位でも良好な特性を
示している。また実施例1〜2においては波長780n
mの長波長光でも高感度を示し、半導体レーザプリンタ
用として充分使用可能であることがわかる。 〔実施例5〕厚さ500μmのアルミニウム板上にセレ
ンを厚さ1.5μmに真空蒸着し電荷発生層を形成し、
次に化合物No. I−5で示される化合物100重量部
とポリカーボネート樹脂(商品名PCZ200:三菱ガ
ス化学製)100重量部を塩化メチレンに溶解してでき
た塗液をワイヤーバーにて塗布し、乾燥後の膜厚が20
μmになるように電荷輸送層を形成し感光体を作製し
た。この感光体に−6.0kVのコロナ帯電を10秒間
行ったところ、白色光下でVs=−750V、Vr=−
20V、E1/2 =1.2lx・sと良好な結果が得られ
た。 〔実施例6〕x型無金属フタロシアニン50重量部、塩
化ビニル共重合体(商品名MR−110:日本ゼオン
製)50重量部を塩化メチレンとともに3時間混合機に
より混練して塗布液を調整し、アルミニウム支持体上に
約1μmになるように塗布し電荷発生層を形成した。
[Table 1] As can be seen in Table 1, Examples 1-4 have a half-attenuated exposure dose,
The residual potential is good, and the surface potential shows good characteristics. Further, in Examples 1 and 2, the wavelength is 780n.
It can be seen that even with a long-wavelength light of m, it exhibits high sensitivity and can be sufficiently used for semiconductor laser printers. Example 5 Selenium was vacuum-deposited to a thickness of 1.5 μm on an aluminum plate having a thickness of 500 μm to form a charge generation layer,
Next, a coating solution prepared by dissolving 100 parts by weight of the compound represented by Compound No. I-5 and 100 parts by weight of a polycarbonate resin (trade name PCZ200: manufactured by Mitsubishi Gas Chemical Co., Ltd.) in methylene chloride is applied with a wire bar, The film thickness after drying is 20
A charge transport layer was formed so as to have a thickness of μm to prepare a photoconductor. When the photoreceptor was charged with a corona of -6.0 kV for 10 seconds, Vs = -750 V and Vr =-under white light.
Good results were obtained at 20 V and E 1/2 = 1.2 lx · s. [Example 6] 50 parts by weight of x-type metal-free phthalocyanine and 50 parts by weight of vinyl chloride copolymer (trade name MR-110: manufactured by Nippon Zeon Co., Ltd.) were mixed with methylene chloride for 3 hours to prepare a coating solution. A charge generation layer was formed by coating the aluminum support on the substrate to a thickness of about 1 μm.

【0033】次に化合物No. II−1で示される化合物
100重量部、ポリカーボネート樹脂(商品名パンライ
トL−1250:帝人化成製)100重量部、シリコン
オイル0.1重量部を塩化メチレンで混合し、電荷発生
層の上に約20μmとなるように塗布し電荷輸送層を形
成し感光体を作製した。このようにして得られた感光体
を実施例5と同様にして、−6.0kVのコロナ帯電を
10秒間行ったところ、白色光下で、Vs=−745
V、E1/2 =0.9lx・sと良好な結果が得られた。 〔実施例7〕実施例6において、無金属フタロシアニン
に替えて下記構造式(IV)で示されるビスアゾ顔料を用
い、また電荷輸送物質を化合物No. II−5で示される
化合物に替えて実施例5と同様に感光体を作製した。こ
のようにして得られた感光体を、実施例5と同様にし
て、−6.0kVのコロナ帯電を10秒間行ったとこ
ろ、白色光下でVs=−760V、E1/2 =1.2lx
・sと良好な結果が得られた。
Next, 100 parts by weight of the compound represented by Compound No. II-1, 100 parts by weight of a polycarbonate resin (trade name: Panlite L-1250, manufactured by Teijin Chemicals), and 0.1 part by weight of silicone oil are mixed with methylene chloride. Then, it was coated on the charge generation layer so as to have a thickness of about 20 μm to form a charge transport layer, thereby preparing a photoreceptor. The photoreceptor thus obtained was subjected to corona charging at -6.0 kV for 10 seconds in the same manner as in Example 5, and Vs = -745 under white light.
Good results were obtained with V, E 1/2 = 0.9 lx · s. [Example 7] In Example 6, the metal-free phthalocyanine was replaced with a bisazo pigment represented by the following structural formula (IV), and the charge transporting material was replaced with the compound represented by Compound No. II-5. A photoconductor was prepared in the same manner as in No. 5. The photoreceptor thus obtained was subjected to corona charging at -6.0 kV for 10 seconds in the same manner as in Example 5. As a result, Vs = -760 V, E 1/2 = 1.2 lx under white light.
・ S and good results were obtained.

【0034】[0034]

【化12】 [Chemical 12]

【0035】[0035]

【発明の効果】この発明によれば、導電性基体上に電荷
輸送物質として前記一般式(I)または(II)で示され
るスチリル化合物を用いることとしたため、正帯電およ
び負帯電においても高感度でしかも繰り返し特性の優れ
た感光体を得ることができる。また電荷発生物質は露光
光源の種類に対応して好適な物質を選ぶことができ、一
例をあげるとフタロシアニン化合物、スクアリリウム化
合物およびある種のビスアゾ化合物などを用いれば半導
体レーザプリンターに使用可能な感光体を得ることがで
きる。さらに必要に応じて表面に被覆層を設置して耐久
性を向上することが可能である。
According to the present invention, since the styryl compound represented by the general formula (I) or (II) is used as the charge transporting material on the conductive substrate, it has high sensitivity even in positive charging and negative charging. Moreover, it is possible to obtain a photoreceptor having excellent repeating characteristics. Further, as the charge generating substance, a suitable substance can be selected according to the type of the exposure light source. For example, a phthalocyanine compound, a squarylium compound, and a certain bisazo compound can be used as a photoconductor which can be used in a semiconductor laser printer. Can be obtained. Further, if necessary, a coating layer may be provided on the surface to improve durability.

【図面の簡単な説明】[Brief description of drawings]

【図1】この発明の実施例にかかる単層型感光体を示す
断面図
FIG. 1 is a sectional view showing a single-layer type photoconductor according to an embodiment of the present invention.

【図2】この発明の実施例にかかる負帯電の積層型感光
体を示す断面図
FIG. 2 is a cross-sectional view showing a negatively charged laminated type photoreceptor according to an embodiment of the present invention.

【図3】この発明の実施例にかかる正帯電の積層型感光
体を示す断面図
FIG. 3 is a cross-sectional view showing a positively charged laminated type photoreceptor according to an embodiment of the present invention.

【符号の説明】[Explanation of symbols]

1 導電性基体 3 電荷発生物質 4 電荷発生層 5 電荷輸送物質 6 電荷輸送層 7 被覆層 20 感光層 21 感光層 22 感光層 1 Conductive Substrate 3 Charge Generating Material 4 Charge Generating Layer 5 Charge Transporting Material 6 Charge Transporting Layer 7 Covering Layer 20 Photosensitive Layer 21 Photosensitive Layer 22 Photosensitive Layer

───────────────────────────────────────────────────── フロントページの続き (72)発明者 鍋田 修 神奈川県川崎市川崎区田辺新田1番1号 富士電機株式会社内 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Osamu Nabeta 1-1 1-1 Tanabe Nitta, Kawasaki-ku, Kawasaki-shi, Kanagawa Prefecture Fuji Electric Co., Ltd.

Claims (3)

【特許請求の範囲】[Claims] 【請求項1】感光層が積層された導電性基体を有し、感
光層は下記一般式 (I) で示されるスチリル化合物のう
ち少なくとも一種電荷輸送物質として含むことを特徴と
する電子写真用感光体。 【化1】 〔式中、Rn (n=1ないし8)は水素原子、アルキル
基または置換もしくは無置換のアリール基を表し、Ar
1 は置換もしくは無置換のアリール基または複素環基を
表す。〕
1. A photosensitive material for electrophotography, comprising a conductive substrate on which a photosensitive layer is laminated, and the photosensitive layer contains at least one of styryl compounds represented by the following general formula (I) as a charge transporting substance. body. [Chemical 1] [Wherein R n (n = 1 to 8) represents a hydrogen atom, an alkyl group or a substituted or unsubstituted aryl group, and Ar
1 represents a substituted or unsubstituted aryl group or heterocyclic group. ]
【請求項2】感光層が積層された導電性基体を有し、感
光層は下記一般式 (II) で示されるスチリル化合物のう
ち少なくとも一種電荷輸送物質として含むことを特徴と
する電子写真用感光体。 【化2】 〔式中、Rn (n=9ないし12)は水素原子、アルキ
ル基または置換もしくは無置換のアリール基を表し、A
2 は置換もしくは無置換のアリール基または複素環基
を表す。〕
2. A photosensitive material for electrophotography, comprising a conductive substrate on which a photosensitive layer is laminated, and the photosensitive layer contains at least one kind of styryl compound represented by the following general formula (II) as a charge transporting substance. body. [Chemical 2] [Wherein R n (n = 9 to 12) represents a hydrogen atom, an alkyl group or a substituted or unsubstituted aryl group, and A n
r 2 represents a substituted or unsubstituted aryl group or heterocyclic group. ]
【請求項3】請求項1または2記載の電子写真用感光体
において、感光層は電荷発生層と電荷輸送層の積層され
たものであることを特徴とする電子写真用感光体。
3. The electrophotographic photoreceptor according to claim 1, wherein the photosensitive layer is a laminate of a charge generation layer and a charge transport layer.
JP20676393A 1993-08-23 1993-08-23 Electrophotographic photoreceptor Pending JPH0756367A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP20676393A JPH0756367A (en) 1993-08-23 1993-08-23 Electrophotographic photoreceptor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP20676393A JPH0756367A (en) 1993-08-23 1993-08-23 Electrophotographic photoreceptor

Publications (1)

Publication Number Publication Date
JPH0756367A true JPH0756367A (en) 1995-03-03

Family

ID=16528689

Family Applications (1)

Application Number Title Priority Date Filing Date
JP20676393A Pending JPH0756367A (en) 1993-08-23 1993-08-23 Electrophotographic photoreceptor

Country Status (1)

Country Link
JP (1) JPH0756367A (en)

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