Upconversion Nanocrystals for Sustainable Technology provides an overview of the current research directions in upconverting nanocrystals and their role in the development of sustainable technologies. This book focuses on the development of low-cost, nontoxic, and energy-efficient upconverting nanocrystals for a wide range of applications. It reviews size control synthesis techniques of nanostructured materials in different dimensions, size-dependent properties, and the relationship between material properties and performance. This book discusses the use of upconversion materials for lasers, display, lighting, energy, and biomedical applications-with a focus on the use of these materials to develop more sustainable technologies. This book is suitable for new entrants in academia and R&D with a scientific background in materials science and engineering, chemistry, and chemical engineering.