An overcoat layer for an organic photoconductor drum includes a curable composition having about 20 to about 80 percent by weight of a charge transport molecule containing four radical polymerizable functional groups as exemplified below: ##STR00001##
where R.sub.1 and R.sub.2 contain a spacer group and a radical polymerizable functional group, R.sub.3 and R.sub.4 are hydrogen atoms, and R.sub.5 and R.sub.6 contain a spacer group and a radical polymerizable functional group. The curable composition may also include a non-radical polymerizable additive, such as a surfactant, and/or a curing agent.

An overcoat layer for an organic photoconductor drum includes a curable composition having about 20 to about 80 percent by weight of a charge transport molecule containing four radical polymerizable functional groups as exemplified below: ##STR00001##
where R.sub.1 and R.sub.2 contain a spacer group and a radical polymerizable functional group, R.sub.3 and R.sub.4 are hydrogen atoms, and R.sub.5 and R.sub.6 contain a spacer group and a radical polymerizable functional group. The curable composition may also include a non-radical polymerizable additive, such as a surfactant, and/or a curing agent.

The present invention relates to the provision of an organic compound or compounds containing a fluorenone derivative structure or its substituted derivatives to enhance the thermal stability of organic solar cells.

The present invention relates to the provision of an organic compound or compounds containing a fluorenone derivative structure or its substituted derivatives to enhance the thermal stability of organic solar cells.

A condensed cyclic compound represented by Formula 1, a composition including the same, and an organic light-emitting device including the condensed cyclic compound:

##STR00001##

wherein R.sub.1-R.sub.6, L.sub.1-L.sub.2, Ar.sub.1, n1, a1-a2, and b3-b6 are described in the specification.

A condensed cyclic compound represented by Formula 1, a composition including the same, and an organic light-emitting device including the condensed cyclic compound:

##STR00001##

wherein R.sub.1-R.sub.6, L.sub.1-L.sub.2, Ar.sub.1, n1, a1-a2, and b3-b6 are described in the specification.

The present invention relates to a ring closure reaction useful in synthesizing fused aromatic or heteroaromatic ring systems, which may, for example, be used as organic semiconductor materials.

The present invention relates to a ring closure reaction useful in synthesizing fused aromatic or heteroaromatic ring systems, which may, for example, be used as organic semiconductor materials.

The present specification relates to a novel compound and an organic light emitting device including the same.

The present specification relates to a novel compound and an organic light emitting device including the same.