Modern Luminescence from Fundamental Concepts to Materials and Applications: Volume Two: Luminescence in Materials is part of a multivolume work that reviews the fundamental principles, properties and applications of luminescent materials. Topics addressed include 1) The key concepts of luminescence with a focus on important characterization techniques to understand a wide category of luminescent materials, 2) The most relevant luminescent materials categories, including both current and emerging materials, and 3) The applications of luminescent materials in biomedicine, solid state devices, and the development of hybrid materials. This updated volume reviews the most relevant luminescent materials, including transition metals, rare-earth materials, actinide-based materials, and organic materials. In addition, the book reviews luminescence mechanisms in relevant, emerging materials and the optical techniques used to characterize these materials.