Hot-Carrier Dynamics in Quantum Dots

This lecture by the instructor covers the topic of hot-carrier dynamics in quantum dots, focusing on spin-exchange Auger interactions and impact ionization due to Coulombic collisions. It discusses carrier multiplication in bulk semiconductors and colloidal quantum dots, emphasizing the efficiency of photon-to-exciton conversion. The lecture also explores the quantum efficiency of nanocrystals compared to bulk semiconductors and the mechanisms of energy transfer between quantum dots and Mn ions. Additionally, it delves into the spin-exchange interactions between QD excitons and Mn ions, as well as the intra-band cooling processes. The presentation concludes with insights on carrier multiplication engineering and the potential applications in photoconversion, photoemission, and photoconductance.