Perspective: Nonequilibrium dynamics of localized and delocalized excitons in colloidal quantum dot solids

• Main Authors: Lee, Elizabeth M. Y. (Author), Tisdale, William (Author), Willard, Adam P. (Author)
• Other Authors: Massachusetts Institute of Technology. Department of Chemical Engineering (Contributor), Massachusetts Institute of Technology. Department of Chemistry (Contributor)
• Format: Article
• Language: English
• Published: American Vacuum Society, 2020-07-24T22:23:38Z.
• Subjects: Article
• Online Access: Get fulltext

Self-assembled quantum dot (QD) solids are a highly tunable class of materials with a wide range of applications in solid-state electronics and optoelectronic devices. In this perspective, the authors highlight how the presence of microscopic disorder in these materials can influence their macroscopic optoelectronic properties. Specifically, they consider the dynamics of excitons in energetically disordered QD solids using a theoretical model framework for both localized and delocalized excitonic regimes. In both cases, they emphasize the tendency of energetic disorder to promote nonequilibrium relaxation dynamics and discuss how the signatures of these nonequilibrium effects manifest in time-dependent spectral measurements. Moreover, they describe the connection between the microscopic dynamics of excitons within the material and the measurement of material specific parameters, such as emission linewidth broadening and energetic dissipation rate. ©2018 Author(s).
2017 AIChE Annual Meeting's Electronic and Photonic Material Graduate Student Award
Center for Excitonics, funded by the US DOE, Office of Science, Office of Basic Energy Sciences (Award No. DE-SC0001088)