Claims
- 1. A photoreceptor comprising a brominated anthanthrone pigment represented by the structural formula: ##STR23## contained in the photosensitive layer, said brominated anthanthrone pigment exhibiting an X-ray diffraction spectrum having the respective diffraction strengths S (18.4.degree.) and S (26.7.degree.) at 2.theta.=18.4.degree. and 26.7.degree. which satisfy the relationship of
- 0. 2.ltoreq.S(18.4.degree.)/S(26.7.degree.).ltoreq.1.0,
- and having a respective half-value width of diffraction strength which satisfies the relationship of
- {.DELTA..theta.(18.4.degree.).ltoreq.0.8} or {.DELTA..theta.(26.7.degree.).ltoreq.1}.
- 2. A photoreceptor according to claim 1, wherein particle shape of said brominated anthanthrone has b/a .gtoreq. 1.1 when a short axis length is defined as a and a long axis length as b.
- 3. A photoreceptor comprising a brominated anthanthrone pigment represented by the structural formula shown below: ##STR24## contained in the photosensitive layer, said brominated anthanthrone pigment exhibiting a X-ray diffraction spectrum having the respective half-value width of diffraction strengths .DELTA..theta.(18.4.degree.) and .DELTA..theta.( 26.7.degree.) at 2.theta.=18.4.degree. and 26.7.degree. which satisfy the relationship of
- {.DELTA..theta.(18.4.degree.).ltoreq.0.8.degree.} or {.DELTA..theta.(26.7.degree.).ltoreq.1.degree.}.
- 4. A photoreceptor according to claim 3, wherein particle shape of said brominated anthanthrone has b/a .gtoreq. 1.1 when a short axis length is defined as a and a long axis length as b.
- 5. A photoreceptor according to claim 4, wherein said a and b satisfies the relationship of 1.5 .ltoreq. b/a .ltoreq. 15.
- 6. A photoreceptor according to claim 4, wherein said long axis length is 2 .mu.m or less.
- 7. A photoreceptor having a carrier transporting layer and a carrier generating layer laminated successively on a support, said carrier generating layer containing a brominated anthanthrone represented by the structural formula: ##STR25## a carrier transporting substance and a binder resin, the content of said brominated anthanthrone in said carrier generating layer being 10 to 300 parts by weight per 100 parts by weight of said binder resin, the content of said carrier transporting substance in said carrier generating layer being 20 to 200 parts by weight per 100 parts by weight of said binder resin, and the ratio of said carrier transporting substance to said brominated anthanthrone being 0.2 to 3.0 in terms of weight ratio, said brominated anthanthrone pigment exhibiting an X-ray diffraction spectrum having the respective half-value widths of diffraction strength of .DELTA..theta.(18.4.degree.) and .DELTA..theta.(26.7.degree.) at 2.theta.=18.4.degree. and 26.7.degree. which satisfy the relationship of
- {.DELTA..theta.(18.4.degree.).ltoreq.0.8.degree.} or {.DELTA..theta.(26.7.degree.).ltoreq.1.degree.}.
- 8. A photoreceptor according to claim 7, wherein the ratio of said brominated anthanthrone:said carrier transporting substance is 1:0.2 to 3.
- 9. A photoreceptor according to claim 7, wherein said brominated anthanthrone pigment exhibiting a X-ray diffraction spectrum having the respective diffraction strengths S (18.4.degree.) and S (26.7.degree.) at 2.theta.=18.4.degree. and 26.7.degree. which satisfy the relationship of
- 0.2.ltoreq.S(18.4.degree.)/S(26.7.degree.).ltoreq.1.0.
- 10. A photoreceptor according to claim 9, wherein the ratio of said brominated anthanthrone:said carrier transporting substance is 1:0.2 to 3.
- 11. A photoreceptor according to claim 7, wherein particle shape of said brominated anthanthrone has b/a .gtoreq. 1.1 when a short axis length is defined as a and a long axis length as b.
- 12. A photoreceptor according to claim 11, wherein the ratio of said brominated anthanthrone:said carrier transporting substance is 1:0.2 to 3.
- 13. A photoreceptor according to claim 11, wherein said a and b satisfies the relationship of 1.5.ltoreq. b/a .ltoreq.15.
- 14. A photoreceptor according to claim 13, wherein the ratio of said brominated anthanthrone:said carrier transporting substance is 1:0.2 to 3.
- 15. A photoreceptor according to claim 11, wherein said long axis length is 2 .mu.m or less.
- 16. A photoreceptor according to claim 15, wherein the ratio of said brominated anthanthrone:said carrier transporting substance is 1:0.2 to 3.
- 17. A photoreceptor according to claim 7, wherein said carrier transporting layer is applied by coating a dispersion thereof on said support.
Priority Claims (3)
Number |
Date |
Country |
Kind |
60-233872 |
Oct 1985 |
JPX |
|
60-233873 |
Oct 1985 |
JPX |
|
60-233874 |
Oct 1985 |
JPX |
|
Parent Case Info
This application is a continuation-in part of our application Ser. No. 920,120, filed Oct. 17, 1986 now abandoned.
US Referenced Citations (2)
Number |
Name |
Date |
Kind |
3877935 |
Regeusburger |
Apr 1975 |
|
4148638 |
Ohta et al. |
Apr 1979 |
|
Continuation in Parts (1)
|
Number |
Date |
Country |
Parent |
920120 |
Oct 1986 |
|