| 초록 |
PbS quantum dots (QDs) have been considered as promising candidate replacing the conventional Ru/organic dye sensitizer because of their prominent properties such as high optical absorption, facile bandgap tunability by size controlling, multiple exciton generation, and easy charge separation by large dipole moment. Despite great potential of PbS QDs in sensitized solar cells, the PbS QDs have problems in efficient charge injection and transportation due to the long chain organic ligands act as insulator. Therefore, the formation of PbS QDs without insulating ligands is still challenging, so we synthesized PbS QDs by spin-assisted SILAR (successive ionic layer adsorption and reaction) method. And furthermore, to deposit more uniform PbS QDs, lead halide precursors are used by precipitation and anion exchange reaction. |
