This project aims to elucidate the excited-state dynamics of aggregation-induced emission (AIE) materials using ultrafast spectroscopic techniques, including femtosecond transient absorption (TA) and time-resolved fluorescence spectroscopy. By systematically investigating AIE-active molecules (e.g., tetraphenylethene derivatives) in dispersed and aggregated states, we will resolve the temporal evolution of non-radiative decay pathways, intersystem crossing rates, and exciton migration dynamics. Key objectives include correlating aggregation-dependent spectral shifts with excited-state lifetimes, identifying structural motifs that enhance radiative transitions, and quantifying the role of restricted intramolecular motion in emission enhancement. These mechanistic insights will advance the rational design of AIE materials with tailored photophysical properties for applications in optoelectronics, bioimaging, and sensing technologies. Experimental data will be complemented by computational modeling to establish structure-dynamics-function relationships, addressing critical gaps in understanding how supramolecular architectures govern ultrafast photophysical behavior.