Journal
LASER & PHOTONICS REVIEWS
Volume 7, Issue 6, Pages 963-993Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/lpor.201300048
Keywords
Solid-state lighting; LEDs; LDs; light-emitting diodes; laser diodes; semiconductor laser; blue lasers; III-nitride; InGaN; AlInGaN; power-conversion efficiency; efficiency droop; quantum efficiency; phosphor-converted LEDs; PC-LEDs; gain; semipolar GaN; Auger recombination; cost of light; thermal management; heat management; heat sink; areal chip cost
Categories
Funding
- Sandia's Solid-State-Lighting Science Energy Frontier Research Center
- U.S. Department of Energy, Office of Basic Energy Sciences. Sandia National Laboratories
- U.S. Department of Energy's National Nuclear Security Administration [DE-AC04-94AL85000]
Ask authors/readers for more resources
Solid-state lighting (SSL) is now the most efficient source of high color quality white light ever created. Nevertheless, the blue InGaN light-emitting diodes (LEDs) that are the light engine of SSL still have significant performance limitations. Foremost among these is the decrease in efficiency at high input current densities widely known as efficiency droop. Efficiency droop limits input power densities, contrary to the desire to produce more photons per unit LED chip area and to make SSL more affordable. Pending a solution to efficiency droop, an alternative device could be a blue laser diode (LD). LDs, operated in stimulated emission, can have high efficiencies at much higher input power densities than LEDs can. In this article, LEDs and LDs for future SSL are explored by comparing: their current state-of-the-art input-power-density-dependent power-conversion efficiencies; potential improvements both in their peak power-conversion efficiencies and in the input power densities at which those efficiencies peak; and their economics for practical SSL.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available