JP2001188372A5 - - Google Patents

Description

[0014]
That is, according to the present invention, (1) an electrophotograph in which a charge generating layer containing at least a charge generating substance, a charge transporting layer containing a low molecular charge transporting substance and an inert polymer are provided on a conductive support. In the photoreceptor, the charge generation layer has a maximum diffraction peak at least 27.2 ° as a diffraction peak (± 0.2 °) at a Bragg angle 2θ with respect to CuKα characteristic X-ray (wavelength 1.541 °), and It has a peak at 7.3 ° as the diffraction peak on the lowest angle side, and also has a peak at 26.3 °. The peak intensity at 26.3 ° is higher than the peak intensity at 27.2 °. And the mobility of the charge transporting layer is 1 × 10 ⁻⁵ (cm / Vsec) in the electric field strength at the time of writing image light when the electrophotographic photosensitive member is actually used. It is characterized by the above (2) The electron according to item (1), wherein the diffraction peak of the titanyl phthalocyanine in a region at an angle lower than 9.4 ° is 7.3 °. (3) The electrophotographic photoreceptor according to the above (1), wherein the titanyl phthalocyanine does not have a peak in the range of 7.4 to 9.4 °. (4) “If the titanyl phthalocyanine has a peak at 28.6 ° at the same time, the intensity is less than 20% of the intensity at 27.2 °, wherein (3) The electrophotographic photoreceptor according to any one of (1) to (5), wherein the titanyl phthalocyanine is synthesized without using a titanium halide. The electrophotographic photosensitive member according to any one of the above (4). , (6) characterized in that said "the charge transporting material is a compound represented by the following general formula (I) subsection (1), second (5) The electrophotographic photosensitive member according to claim;

（式中、Ｒ_１２、Ｒ_１３は水素原子、ハロゲン原子、ニトロ基、シアノ基、置換もしくは無置換のアルキル基等、Ｒ_１４、Ｒ_１５は水素原子、シアノ基、アルコキシカルボニル基、置換もしくは無置換のアルキル基、Ｒ_１６は水素原子、低級アルキル基又はアルコキシ基を表わす。Ｗは水素原子、置換もしくは無置換のアルキル基等、ｒは１〜５の整数、ｓは１〜４の整数、ｔは０〜２の整数、ｕは１〜３の整数、ｖは１〜２の整数を表わす。）」、（１２）「前記不活性高分子がポリカーボネートであることを特徴とする前記第（１）項乃至第（１１）項のいずれかに記載の電子写真感光体」、（１３）「前記電荷輸送層における電荷輸送物質濃度が４５ｗｔ％以下であることを特徴とする前記第（１）項乃至第（１２）項のいずれかに記載の電子写真感光体」、（１４）「導電性支持体上に少なくとも電荷発生物質を含有する電荷発生層と高分子電荷輸送物質を含有する電荷輸送層を設けた電子写真感光体において、該電荷発生層がＣｕＫαの特性Ｘ線（波長１．５４１Å）に対するブラッグ角２θの回折ピーク（±０．２°）として、少なくとも２７．２°に最大回折ピークを有し、且つ最も低角側の回折ピークとして７．３°にピークを有し、且つ２６．３°にもピークを有し、該２６．３°のピーク強度が、前記２７．２°のピーク強度に対して１〜１０％であるチタニルフタロシアニンを含有し、且つ、電子写真感光体の実使用時における画像光書き込み時の電界強度における該電荷輸送層の移動度が１×１０^−５（ｃｍ／Ｖｓｅｃ）以上であることを特徴とする電子写真感光体」、（１５）「前記高分子電荷輸送物質が、少なくともトリアリールアミン構造を主鎖及び／又は側鎖に含むポリカーボネートであることを特徴とする前記第（１４）項に記載の電子写真感光体」、（１６）「前記高分子電荷輸送物質が、下記一般式（ＶＩＩ）で表わされる化合物であることを特徴とする前記第（１５）項に記載の電子写真感光体；[0020]
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(Wherein, R ₁₂ and R ₁₃ represent a hydrogen atom, a halogen atom, a nitro group, a cyano group, a substituted or unsubstituted alkyl group, etc., and R ₁₄ and R ₁₅ represent a hydrogen atom, a cyano group, an alkoxycarbonyl group, a substituted or unsubstituted A substituted alkyl group, R ₁₆ represents a hydrogen atom, a lower alkyl group or an alkoxy group, W represents a hydrogen atom, a substituted or unsubstituted alkyl group, r is an integer of 1 to 5, s is an integer of 1 to 4, t is an integer of 0 to 2, u is an integer of 1 to 3, and v is an integer of 1 to 2) ", (12)" the inert polymer is polycarbonate. (13) The electrophotographic photoreceptor according to any one of the above items (1) to (11), (13) wherein the charge transport layer has a charge transport material concentration of 45 wt% or less. Any of paragraphs to (12) (14) An electrophotographic photoreceptor provided with a charge generation layer containing at least a charge generation substance and a charge transport layer containing a polymer charge transport substance on a conductive support, The charge generation layer has a maximum diffraction peak at at least 27.2 ° as a diffraction peak (± 0.2 °) at a Bragg angle of 2θ with respect to the characteristic X-ray (wavelength 1.541 °) of CuKα, and has the lowest diffraction peak. Has a peak at 7.3 ° and a peak at 26.3 °, and the peak intensity at 26.3 ° is 1 to 10 times the peak intensity at 27.2 °. % Of titanyl phthalocyanine, and the mobility of the charge transport layer in the electric field strength at the time of writing image light when the electrophotographic photosensitive member is actually used is 1 × 10 ⁻⁵ (cm / Vsec) or more. Electron characterized by (15) The electron according to item (14), wherein the polymer charge transporting material is a polycarbonate containing at least a triarylamine structure in a main chain and / or a side chain. (16) The electrophotographic photoreceptor according to the above (15), wherein the polymer charge transporting substance is a compound represented by the following general formula (VII):

Claims (2)

In an electrophotographic photoreceptor provided with a charge generation layer containing at least a charge generation substance and a charge transport layer containing a low molecular charge transport substance and an inert polymer on a conductive support, the charge generation layer has a characteristic of CuKα. It has a maximum diffraction peak at least at 27.2 ° as a diffraction peak (± 0.2 °) at a Bragg angle of 2θ with respect to X-rays (wavelength: 1.541 °) and 7.3 ° as a diffraction peak at the lowest angle side. A titanyl phthalocyanine having a peak intensity at 26.3 °, wherein the peak intensity at 26.3 ° is 1 to 10% of the peak intensity at 27.2 °. And the mobility of the charge transport layer in the electric field strength at the time of image light writing when the electrophotographic photoreceptor is actually used is 1 × 10 ⁻⁵ (cm / Vsec) or more. . In an electrophotographic photoreceptor provided with a charge generation layer containing at least a charge generation substance and a charge transport layer containing a polymer charge transport substance on a conductive support, the charge generation layer is formed of CuKα characteristic X-rays (wavelength 1 0.541 °), a maximum diffraction peak at at least 27.2 ° as a diffraction peak (± 0.2 °) at a Bragg angle of 2θ, and a peak at 7.3 ° as the lowest angle diffraction peak. And a titanyl phthalocyanine whose peak intensity at 26.3 ° is 1 to 10% of the peak intensity at 27.2 °, and electrophotography. An electrophotographic photoreceptor, wherein the mobility of the charge transport layer in electric field strength at the time of image light writing when the photoreceptor is actually used is 1 × 10 ⁻⁵ (cm / Vsec) or more.