Efficient Heterojunction Photovoltaic Cell Utilizing Nanocomposites of Lead Sulfide Nanocrystals and a Low-Bandgap Polymer

摘要

Hybrid polymer-inorganic nanocrystal (NC) solar cells consisting of a hole-conducting conjugated polymer and inorganic semiconducting quantum dots, like cadmium selenide (CdSe), lead sulfide (PbS) and lead selenide (PbSe), have attracted considerable research attention, since the advantages of two classes of materials can be effectively combined. Some of the potential advantages offered by this hybrid approach include: a) low fabrication costs due to easy solution-based processing; b) high optical absorbance and flexible substrate manufacturing of the conjugated polymer matrix; and c) high electron conductance, tunable optical bandgap, and carrier multiplication due to the semiconducting NCs.