Copyright © 2011 Jia-Ming Chang et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. Antrodia camphorata is used in folk medicine

Copyright © 2011 Jia-Ming Chang et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. Carthamus tinctorius (CT), also named

In this study, temperature-dependent current-voltage characteristics and electroluminescence (EL) spectra of GaN/InGaN multi-ple-quantum well light-emitting diodes (LEDs), which were sliced down to a few micrometers by focused ion beam technique, were researched. Compared with electrical property of broad-area LEDs, relatively larger recombination current in the tempera-ture-dependent current-voltage (I-V) characteristics of slice LEDs was observed, indicating that most of defects created by ion damage were activated under elevated temperatures. However, approximately constant peak wavelength of slice LEDs at high current density is attributed to the competition effects of charge screening and joule heating. VC 2011 The Electrochemical Society. [DOI: 10.1149/1.3594750] All rights reserved. Manuscript submitted April 14, 2011; revised manuscript received May 5, 2011. Published May 25, 2011. Recently, wide bandgap GaN-based materials have been used to develop high performance devices such as light-emitting and laser diodes.1–3 Even though device performances have been continu-ously boosted during the past decade, a number of problems have still remained unsolved, such as efficiency droop4–6 at high injection current density and emission wavelength shifting with injection cur-rent. The latter case arises from the divergence effect of spontaneous