Luminescence Luminescence The book you are about to read addresses this need. It contains 9 chapters. From Chapter 1 to Chapter 8, each chapter is on one kind of phosphors, while Chapter 9 is on experimental techniques. The authors describe clearly the physical principles, related backgrounds and research directions for almost every popular luminescent material. Various subjects are covered, such as physics, nonlinear optics, chemistry, quantum mechanism and spectroscopy. Many clear diagrams and illustrations are given to help readers understand and remember the principles well. Definitions are made precisely and much attention has been paid to the differences (even small) the among various concepts. All the equations used in this book are very basic as the authors want to give readers a clear insight into the related physics. No puzzling mathematics or complicated calculations are involved. The book is easy to read and thus very suitable for students who want to get an overall picture of luminescence. Cees Ronda is both an academic professor and a research fellow of Philips. He has given a series of excellent lectures on luminescence in our center during the past several years and we enjoyed very much his style of making everything crystal clear. His personal experience and contacts in industry and academia are essential in putting together such an impressive book. Each theory explained here has practical applications. Many classical papers and books have been cited, as well as the latest developments. R & D histories, current markets and future trends and challenges in luminescence technology are given. Therefore, the book is also very suitable for researchers.