Investigation on Photovoltaic Performance based on Matchstick-Like Cu(2)S-In(2)S(3) Heterostructure Nanocrystals and Polymer.

In this paper, we synthesized a novel type II cuprous sulfide (Cu(2)S)-indium sulfide (In(2)S(3)) heterostructure nanocrystals with matchstick-like morphology in pure dodecanethiol. The photovoltaic properties of the heterostructure nanocrystals were investigated based on the blends of the nanocrystals and poly(2-methoxy-5-(2'-ethylhexoxy)-p-phenylenevinylene) (MEH-PPV). In comparison with the photovoltaic properties of the blends of Cu(2)S or In(2)S(3) nanocrystals alone and MEH-PPV, the power conversion efficiency of the hybrid device based on blend of Cu(2)S-In(2)S(3) and MEH-PPV is enhanced by ~3-5 times. This improvement is consistent with the improved exciton dissociation or separation and better charge transport abilities in type II heterostructure nanocrystals.