Xerographic property, optical absorption, and X-Ray diffraction study of azo/TiOPc composites

The photoconductivities of bilayer photoreceptor devices, containing azo pigments or titanium oxide phthalocyanine (TiOPc) or azo/TiOPc composites as the charge-generation materials (CGMs), and p-diethylaminobenzaldehyde-α-naphthalenyl-phenylhydrazone (DENPH) or p-dimethylaminobenzaldehyde diphenylhydrazone (DMDPH) as the charge-transportation materials (CTMs), have been studied. The results show that the photosensitivities of azo/TiOPc composites are higher than that of pure azo pigments or pure TiOPc. UV/Vis spectra indicate that the absorption spectra of the azo pigments can be broadened by blending with TiOPc. The X-ray diffraction patterns of the blended composites are also studied.