Carrier Transport in Colloidal Nanocrystal Arrays

Colloidal nanocrystals are an emerging type of solution-processed semiconductors that offer a powerful platform for the scalable manufacturing of optoelectronic devices. Understanding carrier dynamics and transport in nanocrystal is crucial for unlocking their full potential for optoelectronic applications. This presentation will introduce a novel optical methodology to investigate the nanoscale photophysics in thin film semiconductors and present the direct visualization of non-equilibrium carrier propagation in PbS nanocrystal arrays. I will discuss the impact of nanocrystal polydispersity on carrier dynamics, the influence of imbalanced carrier transport on solar cell performance, how these can be controlled and optimized through novel materials processing and structure engineering. These findings offer promising strategies to harness transport phenomena for more efficient optoelectronic devices.