Reliability Investigation of LED Devices for Public Light Applications Front Cover Reliability Investigation of LED Devices for Public Light Applications Copyright Contents Introduction Chapter 1. Light emitting Diodes: State of the Art GaN Technologies 1.1. Current economic context 1.2. State of the art GaN based LEDs 1.3. Positioning justification and objectives of the study 1.4. Conclusion Chapter 2. Tools and Analysis Methods of Encapsulated LEDs 2.1. Junction temperature measurement methodologies 2.2. Mechanisms and electrical models of an LED 2.3. Mechanisms and optical models of LED 2.4. Physicochemical characterizations of an LED 2.5. Conclusion Chapter 3. Failure Analysis Methodology of Blue LEDs 3.1. Mission and aging profile 3.2. Aging campaigns 3.3. Initial characterization of LEDs: electrical and optical aspects 3.4. Application of the methodology on low power LEDs 3.5. Summary of results and conclusions Chapter 4. Integration of the Methodology Starting from Component Design 4.1. Mission profile for public lighting 4.2. Aging campaign and component description 4.3. Physical failure analysis 4.4. Summary of results and conclusions Conclusion Bibliography Index Back Cover