Record high efficiencies for a polymer-based solar cell are reported here f
or an inorganic/organic composite photovoltaic device containing a single p
olymer film rather than a polymer/polymer or polymer/nanoparticle blend. Th
e high efficiencies are reported to be due to device construction (see Figu
re) and the electronic properties of the phenyl-amino-p-phenylenevinylene-b
ased polymer used.