A flexible imaging member comprising: a flexible substrate; a charge generating layer disposed on the substrate; and at least one charge transport layer disposed on the charge generating layer, wherein the charge transport layer is formed from a binary solid solution comprises a charge transport component and a polycarbonate binder plasticized with a plasticizer mixture consisting of a phthalate plasticizing liquid and a plasticizer compound; wherein the binary solid solution charge transport layer comprises N,N'-diphenyl-N,N'-bis[3-methylphenyl]-[1,1'-biphenyl]-4,4'-diamine; and further wherein the plasticizing liquid phthalate is a dimethyl phthalate having the molecular structure of Formula or wherein the plasticizing liquid phthalate is a diethyl phthalate having the molecular structure of Formula shown below: and further wherein the plasticizer compound is selected from one of the group consisting of aromatic carbonates having Formulas and; one of the group consisting of aromatic carboxylates having Formulas and; one of the group consisting of diphenyl carbonate monomers having Formulas to; and one of the group consisting of liquid oligomeric polystyrenes having Formulas and all shown in the following molecular structures: wherein R is selected from the group consisting of H, CH 3, CH 2 CH 3, and CH=CH 2, and wherein m is between 0 and 3, and and further wherein the mixture of the plasticizing liquid phthalate and plasticizer compound is present in the charge transport layer in an amount of from 10 percent to 20 percent by weight based on the combined weight of the N,N'-diphenyl-N,N'-bis(3-methylphenyl)-[1,1'-biphenyl]-4,4'-diamine and polycarbonate binder present in the charge transport layer. a flexible substrate; a charge generating layer disposed on the substrate; and at least one charge transport layer disposed on the charge generating layer, wherein the charge transport layer is formed from a binary solid solution comprises a charge transport component and a polycarbonate binder plasticized with a plasticizer mixture consisting of a phthalate plasticizing liquid and a plasticizer compound; wherein the binary solid solution charge transport layer comprises N,N'-diphenyl-N,N'-bis[3-methylphenyl]-[1,1'-biphenyl]-4,4'-diamine; and further wherein the plasticizing liquid phthalate is a dimethyl phthalate having the molecular structure of Formula or wherein the plasticizing liquid phthalate is a diethyl phthalate having the molecular structure of Formula shown below: and further wherein the plasticizer compound is selected from one of the group consisting of aromatic carbonates having Formulas and; one of the group consisting of aromatic carboxylates having Formulas and; one of the group consisting of diphenyl carbonate monomers having Formulas to; and one of the group consisting of liquid oligomeric polystyrenes having Formulas and all shown in the following molecular structures: wherein R is selected from the group consisting of H, CH 3, CH 2 CH 3, and CH=CH 2, and wherein m is between 0 and 3, and and further wherein the mixture of the plasticizing liquid phthalate and plasticizer compound is present in the charge transport layer in an amount of from 10 percent to 20 percent by weight based on the combined weight of the N,N'-diphenyl-N,N'-bis(3-methylphenyl)-[1,1'-biphenyl]-4,4'-diamine and polycarbonate binder present in the charge transport layer.