Theoretical investigation of exciton formation and recombination assisted by phonons in colloidal quantum dots with InP core

The project is devoted to the theoretical study of the role of exciton-phonon interactions in colloidal quantum dots (QDs) of the core/shell type with an InP core with the aim to reveal the maximum controllability of radiative recombination of excitons through the phonon density of states. This research is important from the point of view of improving optoelectronic devices which are based on colloidal QDs, in particular lasers, light-emitting diodes, solar cells. To better understand the phenomena of recombination in colloidal QDs, electronic states will be considered within the framework of eight-band k∙p -theory, and phonon modes will be considered taking into account the elastic and optical characteristics of structural materials and the geometric parameters of the system. The main goal of the project is to develop a theoretical approach to predict the possibility of increasing the quantum yield and suppression of nonradiative recombination, building on the recently obtained experimental results on the fluorescence spectra of InP-based colloidal QDs. The results of the theoretical work will also allow us to evaluate the radiation efficiency of other colloidal QDs from the applied point of view, presenting ways to improve the characteristics of optoelectronic devices.