Using the two-step metalorganic vapor phase epitaxial growth on ZrB2 substrate, we demonstrate violet and UV light-emitting diodes (LEDs). The violet LED shows extremely linear L–I characteristics and a sharp single spectrum with a peak wavelength of 410 nm. In the UV-LED on ZrB2, we confirmed that the vertical conduction through the ZrB2/AlGaN interface is superior to the conventional lateral conduction. The use of ZrB2 substrate is promising for UV light emitting devices with low operating voltage. (© 2003 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim)
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Kamiyama et al. (2003) studied this question.
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