Advances in GaN semiconductors for energy efficient solid state lighting

2012 ◽  
Author(s):  
S. P. DenBaars ◽  
Chih-Chien Pan ◽  
N. Pfaff ◽  
S. Tanaka ◽  
J. S. Speck ◽  
...  
Keyword(s):  
Solid State ◽  
Energy Efficient ◽  
Solid State Lighting

Solid-State Lighting: An Approach to Energy-Efficient Illumination

2016 ◽  
pp. 693-751
Author(s):  
Mariano Perálvarez ◽  
Jorge Higuera ◽  
Wim Hertog ◽  
Óscar Motto ◽  
Josep Carreras
Keyword(s):  
Solid State ◽  
Energy Efficient ◽  
Solid State Lighting

Phosphorescent White OLEDs for Solid-state Lighting

2009 ◽  
Vol 1212 ◽  
Author(s):  
Sean Xia ◽  
Peter Levermore ◽  
Vadim Adamovich ◽  
Chun Lin ◽  
Raymond C. Kwong ◽  
...  
Keyword(s):  
Energy Transfer ◽  
Solid State ◽  
Energy Efficient ◽  
High Efficiency ◽  
Solid State Lighting ◽  
Energy Star ◽  
Lighting Industry ◽  
Partial Energy ◽  
White Oleds ◽  
Color Rendering

AbstractWhite OLEDs (WOLEDTMs) fabricated using energy efficient phosphorescent OLED (PHOLEDTM) technology open up exciting new ways to develop efficient white lighting. WOLEDs have the potential to transform the lighting industry. In this presentation, phosphorescent WOLEDs with high conductivity transport layers will be discussed. White light can be generated by partial energy transfer from blue to green and red. Single WOLED stacks are demonstrated that match the Energy Star® lighting color criteria for 2700K and 3000K with high efficiency (˜80 lm/W) and high color rendering indices (˜80). Both devices had operational lifetimes (LT70%) over 30,000 hours measured from an initial luminance of 1,000 cd/m2. Different techniques to improve optical outcoupling will also be discussed.

scholarly journals Energy-efficient control of solid-state lighting

SPIE Newsroom ◽  
2011 ◽  
Author(s):  
Joseph A. Paradiso ◽  
Matthew Aldrich ◽  
Nan Zhao
Keyword(s):  
Solid State ◽  
Energy Efficient ◽  
Solid State Lighting ◽  
Efficient Control

Importance of Eco-Friendly OLED Lighting

2014 ◽  
Vol 357 ◽  
pp. 1-27 ◽  
Author(s):  
N. Thejokalyani ◽  
S.J. Dhoble
Keyword(s):  
Solid State ◽  
Energy Efficient ◽  
High Efficiency ◽  
Life Time ◽  
Solid State Lighting ◽  
Future Application ◽  
Future Research ◽  
Driving Voltage ◽  
Design Strategies ◽  
Practical Applications

The importance of artificial light has long been recognized as it extends the day. Copious corporations and academic institutions are investing cosmic treasures in tracking down the advanced artificial lighting applications with a vision towards energy efficient and eco-friendly solid state lighting. In this regard, organic light-emitting diodes (OLEDs) are going to change the human lifestyle, by offering a promising avenue to develop future energy saving solid-state lighting sources because of their intrinsic characteristics such as low driving voltage, high resolution, high brightness, large viewing angle, large color gamut, high contrast, less weight and size, efficiency etc., there by dictating their ability to reach the pinnacle in the field of flat panel displays and solid state lighting sources. With the goal towards future application, many design strategies like synthesis of novel materials, well judged anatomy of device configuration, development of refined and low cost fabrication techniques have been put forward to achieve high efficiency, good color stability and quality lighting. Practical applications, which enrich the ideas of the specialists in this field to develop new routes for future research development of OLEDs are enumerated and illustrated by specific examples. This chapter also integrates the novel approaches for energy efficient and eco-friendly solid state lighting as well as the limitations and global haphazards of currently used lighting systems. The current state of the art, ongoing challenges and future perspectives of this research frontier to reduce the driving voltage, minimization of degradation issues, enhance their life time are illustrated. Review on the status and future outlook of these OLEDs strongly reveals their emergence in the next few years.

The Evolution of LED Packaging: New Approaches for Solid State Lighting

2012 ◽  
Vol 2012 (DPC) ◽  
pp. 000738-000755
Author(s):  
Robert F. Karlicek
Keyword(s):  
Solid State ◽  
Energy Efficient ◽  
Rapid Evolution ◽  
Input Power ◽  
Solid State Lighting ◽  
Thermal Dissipation ◽  
System Level ◽  
Wafer Level ◽  
Cost Constraints ◽  
Practical Reality

The rapid evolution of solid state lighting is driving rapid and innovative approaches to LED packaging. While the bulk of LEDs are still packaged using decades old technology, the cost and performance needs of solid state lighting are forcing the development of new light emitter packaging technology, some of it being imported from more conventional electronic packaging. Concepts like wafer level packaging, chip on flex technology and SIP technology are infiltrating the LED packaging landscape, but with innovations developing from the need to simultaneously manage input power, thermal dissipation and light extraction for energy efficient lighting. Lighting cost constraints are also driving new requirements for higher packaging speeds and LED integration directly into lighting fixtures rather than through the conventional die-to-package-to-board-to-system sequence. Finally, lighting system performance specifications like intensity, color quality, glare, and beam pattern, all dependent on how light moves from inside the die to the user, are forcing new system level requirements into the LED packaging arena. This talk will discuss how the development and evolution of solid state lighting systems are working to drive innovation and evolution in the development of LED packaging materials, structures and methods. With the need for energy efficient lighting driving a rapid transition from bulbs and tubes to solid state devices, LED packaging is poised for a revolution where the conventional roles of semiconductor packaging are redefined in new and exciting ways that are needed to make solid state lighting a practical reality.

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