Electrophotographic photosensitive member, and electrophotographic apparatus and process cartridge each including the electrophotographic photosensitive member
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United States of America Patent
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Jul 12, 2016
Grant Date -
Sep 11, 2014
app pub date -
Feb 26, 2014
filing date -
Mar 7, 2013
priority date (Note) -
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Abstract
Provided is an electrophotographic photosensitive member excellent in suppression of image deletion and electric potential variation. The surface layer of the electrophotographic photosensitive member comprises a hole transporting substance. The hole transporting substance is one of a compound consisting of a carbon atom and a hydrogen atom, or a compound consisting of a carbon atom, a hydrogen atom, and an oxygen atom. The hole transporting substance comprises a conjugate structure containing 24 or more sp2 carbon atoms. The conjugate structure comprises a condensed polycyclic structure comprising 12 or more sp2 carbon atoms. A ratio of a number of sp2 carbon atoms is 55% or more based on a total number of carbon atoms in the hole transporting substance, and a ratio of a number of sp3 carbon atoms is 10% or more based on a total number of carbon atoms in the hole transporting substance.
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