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IEEE EDL 37, 615 (2016) Flipchip LED on Flexible YSZ

by molenick
Tue, Apr 26th 2016 07:00 am
IEEE EDL 37, 615 (2016)

Abstract—We demonstrate flip-chip light-emitting
diodes (FC-LEDs) on a flexible yttria-stabilized zirconia (YSZ)
substrate and compare them with FC-LEDs on a polymeric
substrate. Degradation of luminescence intensity and red-shift
of peak wavelength are not observed for the LED on the flexible
YSZ, unlike one on the polyimide substrate, due to improved
capability to remove the generated heat from the chip to the
substrate. Thermal distribution measurements and finite-element
simulations show improved thermal management by the flexible
ceramic as compared with previously developed flexible LEDs on
polymeric substrates. The results present an improved solution
to high power operation of flexible LEDs.
Index Terms—Flexible display, light-emitting diodes (LEDs),
thermal management, yttria-stabilized zirconia, polyimide.

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