Self-Assembled PbSe Nanowire:Perovskite Hybrids

Author(s)

Yang, Zhenyu ^[1] ; Yassitepe, Emre ^[1] ; Voznyy, Oleksandr ^[1] ; Janmohamed, Alyf ^[1] ; Lan, Xinzheng ^[1] ; Levina, Larissa ^[1] ; Comin, Riccardo ^[1] ; Sargent, Edward H. ^[1]

Affiliation

^[1] Univ Toronto, Edward S Rogers Dept Elect & Comp Engn, Toronto, ON M5S 3G4 - Canada

• Document type: Journal article
• Source: Journal of the American Chemical Society; v. 137, n. 47, p. 14869-14872, DEC 2 2015.
• Web of Science Citations: 8

Abstract

Inorganic semiconductor nanowires are of interest in nano- and microscale photonic and electronic applications. Here we report the formation of PbSe nanowires based on directional quantum dot alignment and fusion regulated by hybrid organic inorganic perovskite surface ligands. All material synthesis is carried out at mild temperatures. Passivation of PbSe quantum dots was achieved via a new perovskite ligand exchange. Subsequent in situ ammonium/amine substitution by butylamine enables quantum dots to be capped by butylammonium lead iodide, and this further drives the formation of a PbSe nanowire superlattice in a two-dimensional (2D) perovskite matrix. The average spacing between two adjacent nanowires agrees well with the thickness of single atomic layer of 2D perovskite, consistent with the formation of a new self-assembled semiconductor nano-wire:perovskite heterocrystal hybrid. (AU)

• FAPESP's process: 14/18327-9 - Surface trap passivated colloidal quantum dots for application in p-n heterojunction thin film solar cells
• Grantee: Emre Yassitepe
• Support Opportunities: Scholarships abroad - Research Internship - Post-doctor