STRUCTURE AND MORPHOLOGY OF QUANTUM DOTS MODIFYING TIO2 NANOPOROUS FILM IN DYE-SENSITIZED SOLAR CELLS

摘要

In this paper, A three-layer coating nano-sized PbS was synthesized by an in-situ method on TiO2 films. The structure and morphology of nano-sized PbS was studied, characterizations such as TEM and XRD were used. The results indicated that in the PbS clusters, particles of 2-3 nm take the principle part, while some 3-10 nm particles also exist. Such distribution played an important role in interface modifying dye-sensitized solar cells, and the nano-sized PbS modification results in a 21% improvement in overall photo-to-electrical conversion efficiency of the dye-sensitized solar cells