Upconversion Nanocrystals for Sustainable Technology focuses on the current research directions in upconverting nanocrystals and their role in the development of sustainable technology. The book focuses on the development of low-cost, nontoxic, and energy-efficient upconverting nanocrystals for a wide range of applications. In particular, it reviews size control synthesis techniques of nanostructured materials in different dimensions, size-dependent properties, and the relationship between material properties and performance, The 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. Upconversion Nanocrystals for Sustainable Technology is suitable for new entrants in academia and R&D with a scientific background in materials science and engineering, chemistry, and chemical engineering. – Introduces upconverting nanocrystals and their preparation and characterization strategies, properties, and applications- Reviews methods to develop low-cost and energy-efficient technologies based on upconverting nanocrystals- Discusses essential parameters including properties, materials performance, and their scope in the development of sustainable technology