This page provides an in-depth explanation of photoluminescence, dividing it into two categories: fluorescence and phosphorescence. It describes the processes, mechanisms, and factors influencing both...This page provides an in-depth explanation of photoluminescence, dividing it into two categories: fluorescence and phosphorescence. It describes the processes, mechanisms, and factors influencing both types, including radiative and non-radiative deactivation pathways. The page discusses the technological advancements in fluorescence and phosphorescence spectroscopy, related instrumentation, and depicts their quantitative applications for analyzing inorganic and organic analytes.