Trigonal selenium photoconductive element

Claim 2

An imaging member comprising a layer of particulate photoconductive material dispersed in an organic resinous binder, said photoconductive material comprising trigonal selenium containing a mixture of alkaline earth metal selenite and alkaline earth metal carbonate of from about 0.01 to about 12.0 percent total weight based on the weight of the trigonal selenium wherein ratio of the selenite to carbonate ranges from 90 to 10 parts by weight to 10 to 90 parts by weight.

Claim 3

The member according to claim 1 wherein the ratio of selenite to carbonate is approximately equal.

Claim 4

The member according to claim 2 wherein the alkaline earth metal is barium or calcium.

Claim 5

The member according to claim 3 wherein both the selenite and carbonate are present in about 0.01 to about 1.0 percent.

Claim 6

The member according to claim 4 wherein the size of the particulate trigonal selenium is from about 0.01 micron to about 10 microns in diameter.

Claim 7

The member according to claim 5 wherein the size of the particulate trigonal selenium is from about 0.1 micron to about 0.5 micron in diameter.

Claim 8

The member according to claim 1 wherein the member is overcoated with an electrically insulating organic resinous material.

Claim 9

An imaging member comprising a charge generation layer comprising a particulate photoconductive material comprising trigonal selenium dispersed in an organic resinous binder, said trigonal selenium containing a mixture of alkaline earth metal selenite and alkaline earth metal carbonate of from about 0.01 to about 12.0 percent total weight based on the weight of trigonal selenium wherein the ratio of the selenite to carbonate ranges from 90 to 10 parts by weight to 10 to 90 parts by weight and a contiguous charge transport layer, said photoconductive material exhibiting the capability of photogeneration of charge carriers and injection of said charge carriers and said charge transport layer being substantially nonabsorbing in the spectral region at which the photoconductive material generates and injects photo-generated charge carriers but being capable of supporting the injection of photogenerated charge carriers from said photoconductive material and transporting said charge carriers through said charge transport layer.

Claim 10

An imaging member comprising a charge generation layer comprising a particulate photoconductive material comprising trigonal selenium dispersed in an organic resinous binder, said trigonal selenium containing a mixture of alkaline earth metal selenite and alkaline earth metal carbonate of from about 0.01 to about 12.0 percent total weight based on the weight of trigonal selenium wherein the ratio of the selenite to carbonate ranges from 90 to 10 parts by weight to 10 to 90 parts by weight and a contiguous charge transport layer, said photoconductive material exhibiting the capability of photogeneration of charge carriers and injection of said charge carriers and said charge transport layer being substantially nonabsorbing in the spectral region at which the photoconductive material generates and injects photo-generated charge carriers but being capable of supporting the injection of photogenerated charge carriers from said photoconductive material and transporting said charge carriers through said charge transport layer.

Claim 11

The member according to claim 8 wherein the photogenerated charge carriers are photogenerated holes.

Claim 12

The member according to claim 8 wherein the photogenerated charge carriers are photogenerated electrons.

Claim 13

The member according to claim 8 wherein the mole ratio of selenite to carbonate is approximately equal.

Claim 14

The member according to claim 11 wherein the alkaline earth metal is barium or calcium.

Claim 15

The member according to claim 12 wherein both the selenite and carbonate are present in about 0.01 to about 1.0 percent by weight.

Claim 16

The member according to claim 13 wherein the size of the particulate trigonal selenium is from about 0.01 micron to about 10 microns in diameter.

Claim 17

The member according to claim 14 wherein the size of the particulate trigonal selenium is from about 0.1 micron to about 0.5 micron in diameter.

Claim 18

The member according to claim 8 wherein a substrate has a charge injecting layer thereon, said charge transport layer deposited on said injecting layer, said charge generation layer of trigonal selenium in said organic binder deposited on said transport layer and an electrically insulating organic resinous layer deposited on said charge generation layer.