The Effects of Disorder and Dimensionality on the Environment Assisted Quantum Transport of Excitons in Quantum Dot Superlattices

Understanding the fundamentals of exciton transport is essential to better inform the design and application of quantum dot superlattices (QDSLs) in light harvesting systems. Exciton transport is subject to a complex energy landscape where the forces that govern delocalization distances are a result of the wavefunction of the exciton and environmental incoherent forces. By changing the temperature of the surroundings, the exciton will transition between two motivating transport methods: a wave-like ballistic method of diffusion and a particle-like Brownian method of diffusion. Mixing these regimes of transport demonstrates how ENAQT can motivate a maximum amount of transport at an intermediate temperature. This thesis examines measurements made on CsPbBr₃ QDSLs, demonstrating the difference between these two transport mechanisms and the role of dimensionality on the ability of excitons to transport.