Electrophotographic photoreceptor
AssigneeMitsubishi Chemical Corporation
InventorsTeruyuki Mitsumori, Takayuki Shouda, Akiteru Fujii, Mikiko Sato
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Abstract
An electrophotographic photoreceptor having a photosensitive layer containing a charge generation material and a charge transport material on an electroconductive substrate, wherein the charge transport material has a polarizability .alpha. of the formula, .alpha.>100 (.ANG..sup.3) and a dipole moment P of the formula, P<1.6 (D).
Claims24
An electrophotographic photoreceptor having a photosensitive layer containing a charge generation material and a charge transport material on an electroconductive substrate, wherein the charge transport material has a polarizability .alpha. of the formula, .alpha.>130 (.ANG..sup.3) and a dipole moment P of the formula, P<1.6 (D).
An electrophotographic photoreceptor having a photosensitive layer containing a charge generation material and a charge transport material on an electroconductive substrate, wherein the charge transport material has a polarizability .alpha. of a calculated value .alpha.cal of the formula, .alpha.cal>90 (.ANG..sup.3) by structure-optimization calculation in accordance with semi-empirical molecular orbital calculation using PM3 parameter (hereinafter simply referred to as "semi-empirical molecular orbital calculation") and a dipole weight.
An electrophotographic photoreceptor having a photosensitive layer which is a laminate comprising a charge generation layer containing a charge generating material and a charge transport layer containing a charge transport material and contains an aryl amine compound of the following formula (1) on an electroconductive substrate:
- wherein in the formula (1), each of R.sub.1, R.sub.2, R.sub.3, R.sub.4, R.sub.5 and R.sub.6 is a halogen atom, an alkyl which may have a substituent, an alkoxy group which may have a substituent, an aryl group which may have a substituent or a substituted amino group, and they may be the same or different;
- each of k, l, m, n, o and p is zero or an integer of 1 to 4, and when the integer is 2 or more, a plurality of R.sub.1 or R.sub.6 may the same or different;
- X.sub.1 is a group of the formula (2),
- .paren open-st.CR.sub.7 .dbd.CR.sub.8 .paren close-st..sub.i CR.sub.9 .dbd.CR.sub.10 R.sub.11 ( 2)
- and each of X.sub.2, X.sub.3 and X.sub.4 is a group of the formula (2'),
- .paren open-st.CR.sub.12 .dbd.CR.sub.13 .paren close-st..sub.h CR.sub.14 .dbd.CR.sub.15 R.sub.16 ( 2')
- (in the formulas (2) and (2'), is an integer of at least 1, h is zero or an integer of 1 or more, each of R.sub.7, R.sub.8, R.sub.9, R.sub.10, R.sub.11, R.sub.12, R.sub.13, R.sub.14, R.sub.15 and R.sub.16 is a hydrogen atom, an alkyl group which may have a substituent, an alkoxy group which may have a substituent, an aryl group which may have a substituent or a heterocyclic group which may have a substituent, and they may the same or different, provided that with respect to the pair of R.sub.10 and R.sub.11 or the pair of R.sub.15 and R.sub.16, when one is a hydrogen atom or an alkyl group, the other is an aryl group or a heterocyclic group, or the pair of R.sub.10 and R.sub.11 or the pair of R.sub.15 and R.sub.16 may be condensed to form a carbocyclic group or a heterocyclic group, and when i is 2 or more, each of R.sub.7 and R.sub.8 may be the same or different, and when h is 2 or more, each of R.sub.12 and R.sub.13 may be the same or different), and they may be respectively the same or different;
- and each of a, b, c and d is an integer of 1 or 2.
Dependencies are inferred from the claim text.