NPLC-LED - Immersion Cooling Of Suspended And Coated NanoPhosphor Particles For Enhanced Thermal And Optıcal Extraction Of
Light Emitting Diodes For General Illumination
ABSTRACT
Mechanical Engineering
The introduction of high brightness light emitting diodes (LEDs) with white light and monochromatic colors has allowed LED
penetration into general illumination applications. The increased electrical currents used to drive these LEDs have resulted
in high heat fluxes, often exceeding those for average silicon computer chips. The output of a typical HB LED is today over
100 lumens, achieved with heat fluxes in excess of 300 W/cm2. Thermal management is, thus, a critical technology for
LED lighting. Much of the current LED thermal research and development is focusing on air cooling with heat sinks. While
these approaches provide significant heat removal capability, they are constrained by the presence of multiple interface
resistances and they cannot effectively address non-uniform chip temperatures and local phosphor hot spots. To overcome
the limitations imposed by air cooling, this research will investigate the potential of direct liquid cooling to provide an
additional thermal path for heat dissipated in the LEDs and phosphor layers. The introduction of topside liquid cooling with
optically-transparent liquids is expected to dramatically reduce average chip temperatures and to improve the uniformity of
chip and phosphor temperature, leading to higher light extraction efficiencies.
Doç. Dr.
Mehmet Arık
DEPARTMENT
Mechanical Engineering
CONTACT
[email protected]
FUNDING SCHEME
EC Marie Curie Career
Integration Grants
2012 International Grants
START DATE
01.06.2012
DURATION
48 months
OZU BUDGET
100.000,00 EUR
56