Organic electrophotographic recording medium

US4429029A · kind A · utility

Assignee

• BASF SE

Inventors

• Gerhard Hoffmann · Otterstadt, DE
• Fritz Graser · Ludwigshafen, DE
• Reinhold J. Leyrer · Schifferstadt, DE

Key dates

• Filing date: Mar 16, 1982
• Grant date: Jan 31, 1984
• Expiry date: Mar 16, 2002

Classification

• Technology area (CPC G): Physics
• CPC primary: G03G5/0659
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

An electrophotographic recording medium which consists essentially of an electrically conductive base and a photosemiconductive double layer which comprises a first layer containing charge carrier-producing dyes, and a second layer containing one or more compounds which are charge carrier-transporting when exposed to light, wherein the charge carrier-producing dyes are those of the formula I ##STR1## or of the formula II ##STR2## where R.sup.1 is hydrogen, alkyl, aralkyl, alkyl or alkylaryl, and Z may be a a fused aromatic system, and the degree to which the aromatic skeleton is halogen-substituted is from 45 to 75% of the maximum possible, and a process for the production of this electrophotographic recording medium.