Presentation Information
[23a-22C-6]Hole Mobility in the Film of Lead(II) Sulfide Quantum Dots with Cross-linked Ligands
〇Koichi Tamaki1, Haibin Wang2, Takaya Kubo1, Hiroshi Segawa1,2 (1.RCAST, UTokyo, 2.Grad. School Arts Sciences, UTokyo)
Keywords:
quantum dot solar cells,hole mobility,ligand engineering
To improve energy conversion efficiency of bulk heterojunction solar cells consisting of lead sulfide colloidal quantum dots densely infiltrated among zinc oxide nanowires, it is effective to increase the hole mobility in the part of quantum dots (QDs). Reducing defect on the surface of QDs and increaing electronic coupling between QDs are effective for the increment. To achieve this, development of engineering ligands that coordinate to the QDs is one of the most important issues. For this purpose, we focus on cross-linked QD ligands with coordination sites at both terminals of the molecule. And, we report on our investigation of the effect of the ligand size and its electron donor/acceptor property on the hole mobility of solid-state films of QD.