STOICHIOMETRIC DOPING OF COPPER SULFIDE NANOCRYSTALS ASSEMBLIES WITH TUNABLE ELECTRONIC PROPERTIES
Abstract
A small number of copper escaped from lattice of copper sulfide nanocrystals yields stoichiometric mismatch between copper and sulfide atoms in the material, i.e. Cu2-xS NCs (where x represents the degree of mismatched stoichiometry). This mismatch in stoichiometry leads to generate extra holes in the material, providing it with self-doped p-type electronic characteristics. Thus, delicate control in the atomic stoichiometry of the material allows fine tuning in the material characteristics. When exploiting these NCs in electronic devices or in electrochemical systems, they must form thin-film assemblies and the constituent NCs should be electronically coupled to each other. In this project, we propose to develop a versatile conversion platform that allows delicate control in the atomic stoichiometry for highly coupled Cu2-xS NCs assemblies, which should be, in principle, directly applied to electronic devices (e.g., theremoelectric devices) or in electrochemical systems (electrocatalysts). Using the platform, we propose to investigate the fundamental electronic properties of the semiconductor nanocrystal assemblies, including the optical properties, charge transport properties, thermoelectrical properties, and electrocatalytic properties. The project is aimed to acquire fundamental understanding on nanostructured semiconductor systems.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Aug 11, 2021
- Source ID
- FA23862014088
Entities
People
- Wansoo Huh
Organizations
- Air Force Office of Scientific Research
- Soongsil University
- United States Air Force