15 February 2008 ZnO cone-shaped blue light emitting diodes
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Abstract
We report on ZnO wafer bonded III-nitride light emitting diodes (LEDs). ZnO wafer was selectively etched to form a hexagonal pyramid shape. For enhancing light extraction and heat conductivity, two types of LED structures were demonstrated: one is having patterned GaN at the wafer bonded interface between GaN and ZnO, the other is the LED having no sapphire. The experimental results of electrical and optical characteristics indicate the high potential of these types of LEDs for solid state lighting sources.
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A. Murai, D. B. Thompson, U. K. Mishra, S. Nakamura, S. P. DenBaars, "ZnO cone-shaped blue light emitting diodes", Proc. SPIE 6895, Zinc Oxide Materials and Devices III, 68950N (15 February 2008); doi: 10.1117/12.778558; https://doi.org/10.1117/12.778558
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