The present invention provides novel polymer compositions comprising a
polymeric component and a novel organic iridium compound comprising at
least one cyclometallated ligand and at least one ketopyrrole ligand. The
organic iridium compounds used in the polymer compositions are referred
to as Type (1) organic iridium compositions and are constituted such that
no ligand of the novel organic iridium compound has a number average
molecular weight of 2,000 grams per mole or greater (as measured by gel
permeation chromatography). Type (1) organic iridium compositions are
referred to herein as comprising "organic iridium complexes". In one
aspect, the polymeric component may be an electroactive polymer. The
novel polymer compositions of the invention are useful in optoelectronic
electronic devices such as OLED devices and photovoltaic devices. In one
aspect, the invention provides novel polymer compositions useful in the
preparation of OLED devices exhibiting enhanced color properties and
light output efficiencies.