Silsesquioxane compositions containing tertiary arylamines for hole transport
申请人:Heidelberger Druckmaschinen AG
公开号:US06517984B1
公开(公告)日:2003-02-11
An electrophotographic element comprises: an electrically conducting layer, a charge generating layer overlying the electrically conducting layer, and a charge transport layer overlying the electrically conducting layer. The charge transport layer, which can be an overcoat overlying the charge generating layer, comprises the reaction product in an aqueous medium of a mixture comprising a silsesquioxane polymer and a hole transport compound that comprises a tertiary arylamine containing at least one alcoholic or one phenolic hydroxy substituent.
An electrophotographic element comprises: an electrically conducting layer, a charge generating layer overlying the electrically conducting layer, and a charge transport layer overlying the electrically conducting layer. The charge transport layer, which can be an overcoat overlying the charge generating layer, comprises the reaction product in an aqueous medium of a mixture comprising a silsesquioxane polymer and a hole transport compound that comprises a tertiary arylamine containing at least one alcoholic or one phenolic hydroxy substituent.
An OLED device comprises a light-emitting layer containing a hydrocarbon host material and a light-emitting material of Formula (1):
wherein: each Ar represents an independently selected aromatic group;
each R
1
represents an independently selected alkyl group or aromatic group; n is 1 or 2;
Z
a
represents the atoms necessary to form an aromatic ring group; R represents hydrogen or a substituent group; Z represents hydrogen or a substituent group; and
L
1
and L
2
represent independently selected substituent groups; provided that any two adjacent substituents of any of the above groups may join to form a ring.