Conclusion The output power of lamped LEDs with ITO p-contact was found to be 8.4 mW and at 20 mA, and the external quantum efficiency of 13.9% was obtained, which is substantially larger than the other normal Ni–Au LEDs (i.e., 4.1 mW and 6.9%). References S. Nakamura, T. Mukai, and M. Senoh, “Candela-class high-brightness InGaN/AlGaN double-hetrostructure blue light-emitting diodes,” Appl. Phys. Lett., vol. 64, pp. 1687– 1689, 1994.  C. H. Chen, S. J. Chang, Y. K. Su, J. K. Sheu, J. F. Chen, C. H. Kuo,and Y. C. Lin, “Nitride-based cascade near white light emitting diodes,”IEEE Photon. Technol. Lett., vol. 14, pp. 908–910, July 2002.