Exciton Dynamics and Optical Properties of Lead Halide
Perovskite Nanocrystals: From Nanorods to Nanocubes
Name
sverko_tsverk_phd_chem_2025_thesis.pdf
Description
Thesis PDF
Size
59.25 MB
Format
Adobe PDF
Checksum (MD5)
87f53cf311c1ee04e89161c02ece3a3b
Author(s)
Šverko, Tara
Advisor(s)
Bawendi, Moungi G.
Date Issued
February 2025
Publisher
Massachusetts Institute of Technology
Abstract
Lead halide perovskites, particularly CsPbBr3, have emerged as leading light emitters for their spectral purity, brightness, and facile synthesis. Their soft, ionic lattice makes them unusually defect tolerant but introduces problems with stability. Additionally, dephasing mechanisms and coupling to phonons are not yet well understood in these semiconductors.
In the first part of the thesis, I investigate highly confined, anisotropic CsPbBr3 nanorods, elucidating the photophysics governing their broad single-particle linewidths. I utilize ensemble and single particle photoluminescence techniques across a wide temperature range in order to pinpoint exciton-phonon coupling mechanisms, structural and surface effects, and spin mixing in these novel materials.
In the second part of the thesis, I focus on the opposite size regime, where collective behaviour dominates the optical properties. I develop a novel spectroscopy to pinpoint dephasing mechanisms that could reduce superradiant and coherent emission in order to promote rational design and future integration of these nanocrystals into quantum information devices.
MIT Department
Massachusetts Institute of Technology. Department of Chemistry
Terms of Use
In Copyright - Educational Use Permitted
Copyright retained by author(s)
Persistent DSpace Link
