Patent ID: 7955768

Claim:
An electrophotographic photoconductor comprising: a conductive substrate, and a photosensitive layer, wherein the photosensitive layer is disposed on the conductive substrate and comprises a charge transporting material having a triarylamine structure represented by General Formula 1, and when peak heights in raman scattering spectra of the triarylamine structure are measured at a wavenumber of 1,324±2 cm −1 by a confocal raman spectroscopy using z-polarized light, the photosensitive layer satisfies Mathematical Formula 1: where Ar 1 , Ar 2 , and Ar 3 are substituted or unsubstituted aromatic hydrocarbon groups, and Ar 1 and Ar 2 , Ar 2 and Ar 3 , and Ar 3 and Ar 1 are optionally combined to form heterocyclic rings, respectively, ε= I (inside) /I (surface) ≧1.1 Mathematical Formula 1 where I (inside) represents the peak height in the raman scattering spectrum obtained by measuring at a depth of 5 μm or more from a surface of the photosensitive layer and I (surface) represents the peak height in the raman scattering spectrum obtained by measuring at a depth of less than 5 μm from the surface of the photosensitive layer, wherein the charge transporting material is vertically oriented to the substrate.