[18a-P8-1~4] 13.6 Nanostructures, quantum phenomena, and nano quantum devices

▲ [18a-P8-1] N-Butylamine surface treatment to decompose ligands and 2D self-assembled controlled connected-nanocrystals arrays

〇(D)Wang Zhen¹, Gaurav Kapil¹, Chao Ding², Qing Shen², Kenji Yoshino³, Shuzi Hayase¹ (1.Univ.KIT, 2.Univ.Ecl Com, 3.Univ.Miyazaki)

Keywords:quantum dots, xanthate decomposition, 2D arrays

Colloidal quantum dots (QDs) are promising materials for photovoltaic and diode application due to their size-dependent bandgap and full energy spectrum. Herein; we demonstrate a novel strategy to realize inorganic ligand exchange on PbS nanocrystals selectively through ligand decomposition under room temperature without damage to nanocrystals, introduction of S^2- to form sulfur-connected PbS QDs enables highly oriented 2D QDs arrays and evenly distributed morphology. Finally bromide and Sulfur hybrid-capped QDs realized enhanced carrier mobility significantly measured by Hall Effect.