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E-grāmata: Reliability Investigation of LED Devices for Public Light Applications

(R&D Director, Sunna Design SA), (Associate Professor, University of Bordeaux, France)
  • Formāts: PDF+DRM
  • Izdošanas datums: 09-Mar-2017
  • Izdevniecība: ISTE Press Ltd - Elsevier Inc
  • Valoda: eng
  • ISBN-13: 9780081010921
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Reliability Investigation of LED Devices for Public Light ApplicationsPalielināt
  • Formāts: PDF+DRM
  • Izdošanas datums: 09-Mar-2017
  • Izdevniecība: ISTE Press Ltd - Elsevier Inc
  • Valoda: eng
  • ISBN-13: 9780081010921
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Reliability Investigation of LED Devices for Public Light Applications, based on the work of two main Phd dissertations in 2011 and 2014, describes state-of-the-art GaN technology focusing on the specific electrical and spectral model which is proposed in the second chapter. The authors study the typical failure mechanisms on public lighting applications. The last chapter deals with the degradation and robustness of the automotive applications.

This unique research proposes the technology and methodologies to understand failure mechanisms, exposing the physical and chemical analyses.

  • Based on the work of two main Phd results in 2011 and 2014
  • Describes GaN technology in the state-of-the-art, focusing on the specific electrical and spectral model
  • Proposes the technology and methodologies to understand failure mechanisms

Papildus informācija

Explores GaN technology, specifically the main failure mechanisms centered on plastic packaging, with a specific focus on the electrical and spectral model
Introduction ix
Chapter 1 Light-emitting Diodes: State-of-the-Art GaN Technologies
1(42)
1.1 Current economic context
2(9)
1.1.1 Global LED market
2(3)
1.1.2 Societal and market issues of GaN LEDs for public lighting
5(6)
1.2 State-of-the-art GaN-based LEDs
11(23)
1.2.1 Nitrides: from the wurtzite structure to band engineering
11(7)
1.2.2 Electroluminescent GaN-based diodes
18(16)
1.3 Positioning, justification and objectives of the study
34(8)
1.3.1 Positioning and justification of the study
35(3)
1.3.2 Objectives of the study
38(4)
1.4 Conclusion
42(1)
Chapter 2 Tools and Analysis Methods of Encapsulated LEDs
43(64)
2.1 Junction temperature measurement methodologies
44(9)
2.1.1 Electrical methods
46(4)
2.1.2 Optical methods
50(1)
2.1.3 Methodology synthesis and thermal parameters
51(2)
2.2 Mechanisms and electrical models of an LED
53(8)
2.2.1 Current-voltage measurement bench I(V)
54(1)
2.2.2 Electronic transport phenomena
55(6)
2.3 Mechanisms and optical models of LED
61(21)
2.3.1 Bench optical power measurements
61(2)
2.3.2 Model of optical power
63(6)
2.3.3 Bench spectral measurements
69(2)
2.3.4 Phenomena of electronic transitions of a DH LED
71(5)
2.3.5 Optical parameters of a DH LED
76(2)
2.3.6 Phenomena of electronic transitions of a MQ W LED
78(3)
2.3.7 Optical parameters of a MQW LED
81(1)
2.4 Physicochemical characterizations of an LED
82(23)
2.4.1 Sample preparation techniques
83(2)
2.4.2 Nuclear analyses
85(8)
2.4.3 Electronic analyses
93(4)
2.4.4 Optical analyses
97(5)
2.4.5 Temperature analysis: differential scanning calorimetry
102(2)
2.4.6 Summary of physicochemical analyses
104(1)
2.5 Conclusion
105(2)
Chapter 3 Failure Analysis Methodology of Blue LEDs
107(40)
3.1 Mission and aging profile
108(2)
3.1.1 Component definition
108(1)
3.1.2 Environmental stresses and acceleration factor
109(1)
3.2 Aging campaigns
110(5)
3.2.1 Specifications of accelerated aging
110(1)
3.2.2 Aging campaign
111(4)
3.3 Initial characterization of LEDs: electrical and optical aspects
115(16)
3.3.1 LEDs' technological description
116(3)
3.3.2 Extraction of LEDs' electro-optical parameters
119(12)
3.4 Application of the methodology on low-power LEDs
131(11)
3.4.1 Impact of aging on the optical power
131(1)
3.4.2 Electrical failure signatures
132(2)
3.4.3 Optical failure signatures
134(1)
3.4.4 Confirmation of failure mechanisms: physicochemical analyses
135(7)
3.5 Summary of results and conclusions
142(5)
Chapter 4 Integration of the Methodology Starting from Component Design
147(40)
4.1 Mission profile for public lighting
148(5)
4.1.1 Context and project objectives
149(1)
4.1.2 Environmental requirements and constraints in public lighting
150(2)
4.1.3 Studied technologies
152(1)
4.2 Aging campaign and component description
153(3)
4.2.1 Aging campaign specifications
153(1)
4.2.2 Technological description of LEDs
154(2)
4.3 Physical failure analysis
156(29)
4.3.1 Location of degraded areas: electro-optical and thermal failure signature
157(14)
4.3.2 Validation of failure mechanisms by using physiochemical analyses
171(13)
4.3.3 Technological solutions
184(1)
4.4 Summary of results and conclusions
185(2)
Conclusion 187(8)
Bibliography 195(14)
Index 209
Raphael Baillot is R&D and innovation director of Sunna Design SA. He leads the overall R&D and innovation roadmap of Sunna Design focused on the development of LED-based solar street lights to bring sustainable solutions to the global market of rural electrification. Yannick Deshayes is Associate Professor at the University of Bordeaux, France. His research focuses on the physics of failure, from photonics materials to complex devices. He develops quantum theory to establish degradation laws on photonics devices for LED, laser and photonics applications..
Biežāk uzdotie jautājumi par e-grāmatām Biežāk uzdotie jautājumi par e-grāmatām
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