• Kim, Young-Hoon
• Luther, Joey
• Gish, Melissa
• Myers, Alexis
• Lu, Haipeng
• Blackburn, Jeff
• Hao, Ji

Abstract

<jats:p>Low-dimensional semiconductors provide a rich tapestry of tunable optical and electrical properties for a wide variety of applications. Semiconducting single-walled carbon nanotubes (s-SWCNTs) have shown tremendous potential in applications ranging from digital logic, biological imaging, quantum information processing, photovoltaics, and thermoelectric energy harvesting. Energy harvesting applications rely critically upon the creation of tailored interfaces that enable the movement of energetic species (excitons, electrons, holes) in specified directions. While organic energy harvesting devices often employ interfaces between distinct organic species such as polymers, fullerenes, and carbon nanotubes, hybrid interfaces between organic and inorganic semiconductors have unique properties that are relatively unexplored.</jats:p><jats:p>In this talk, I will discuss our recent efforts at constructing novel hybrid interfaces between s-SWCNTs and other low-dimensional semiconductors, including monolayer transition metal dichalcogenides and metal-halide perovskites. I will discuss time-resolved spectroscopy results exploring photoinduced separation of (in some case spin-polarized) charges across such interfaces, demonstrating utility for photovoltaics and novel photodetectors. Complementary device studies demonstrate exceptional efficiencies for conversion of photons into stable photocurrent, and I will highlight several novel applications in which these interfaces can be employed.</jats:p>

Topics

• perovskite
• polymer
• Carbon
• nanotube
• semiconductor
• spectroscopy