@article{Spectroscopies:1817,
      recid = {1817},
      author = {Williams, Nicholas Edward},
      title = {Probing Quantum Dynamics and Spectral Broadening in  Semiconductor Nanocrystals With Nonlinear Spectroscopies},
      publisher = {University of Chicago},
      school = {Ph.D.},
      address = {2019-06},
      pages = {178},
      abstract = {Semiconductor nanocrystals (NCs) are becoming increasingly  entrenched in modern consumer technologies. Their  versatility and capability to produce light emitting  devices with high photoluminescence quantum yield, solar  cells with excellent power conversion efficiencies, and  extendibility to many other applications and industries  including biotechnology have made NCs an exciting area of  research and engineering. To realize the next generation of  devices that use NCs effectively, it is important to  understand how these nanoscale materials function at the  quantum level using an array of techniques that can probe  the electronic structure, morphology and size  distributions, and ultrafast carrier dynamics that result  in their remarkable macroscopic behavior. In this thesis I  use two-dimensional electronic spectroscopy (2DES) to  examine these properties and aid synthetic efforts to  optimize these materials for various applications. In  chapter 3, InP quantum dots are examined using many  techniques includes 2DES to explain their broad emission  spectra by understanding the electronic structure of  emissive defects in the nanocrystalline lattice. Chapter 4  presents work in developing a novel synthesis of  methylammonium lead-halide perovskites and using 2DES to  probe the ultrafast dynamics of these NCs that are used in  effective solar harvesting devices. In chapter 5, thin  films of CdSe nanoplatelets are probed using 2DES with  various pump laser powers, both at room temperature and 77K  to gain insight into these materials that are used in  low-threshold laser applications. Finally, chapter 6  concludes the thesis by proposing some future directions  for our group as we continue to explore the quantum  dynamics and electronic structure of interesting  nanomaterials.},
      url = {http://knowledge.uchicago.edu/record/1817},
      doi = {https://doi.org/10.6082/uchicago.1817},
}