Investigation on the photoconductive composites: TiOPc with various AZOs

• Published in: Materials chemistry and physics 2002-01, Vol.73 (1), p.70-73
• Main Authors: Zhou, Xue Qin, Wang, Mang, Yang, Shi Ling
• Format: Article
• Language: English
• Subjects: Charge transfer; Composites; Condensed matter: electronic structure, electrical, magnetic, and optical properties; Electronic transport in condensed matter; Exact sciences and technology; Photoconduction and photovoltaic effects; Photoconduction and photovoltaic effects; photodielectric effects; Photoconductivity; Physics
• ISSN: 0254-0584; 1879-3312
• DOI: 10.1016/S0254-0584(01)00353-4

The relationship between photoconductivity and content of azo has been studied in double-layered photoreceptor devices where azo/titanium oxide phthalocyanine (TiOPc) composites were used as the charge generation materials (CGMs) and N, N′-diethyl- p-phenyl aldehyde biphenyl hydrazone (DENH) served as the charge transporting material (CTM). Composites of 3,3′-dichloro-4,4′-bis(1″-azo-2″-hydroxy-3″-naphthoyl- o-chloroanide) biphenyl (DBCL) and TiOPc change photosensitivity with the content of DBCL, and two maximums were observed at 5 and 60% (by weight), respectively. Composites of 4,4′-bis (1″-azo-2″-hydroxy-3″-naphthoyl- o-chloroanide)biphenyl ether (DBO) and TiOPc show two maximums at 25 and 68%, respectively, while two maximums at 8 and 70% were recorded for composites of TiOPc with 4,4′-bis(1″-azo-2″-hydroxy-3″-naphthoyl- o-chloroanide) biphenyl (AZO-AS). Results from ESR measurements indicate that there exists a charge transfer from azos to TiOPc. Different contents of TiOPc change the degree of the charge transfer, resulting in various xerographic properties of the composites.