Improved External Efficiency InGaN-Based Light-Emitting Diodes with Transparent Conductive Ga-Doped ZnO as p-Electrodes

Ken Nakahara, Kentaro Tamura, Mitsuhiko Sakai, Daisuke Nakagawa, Norikazu Ito, Masayuki Sonobe, Hidemi Takasu, Hitoshi Tampo, Paul Fons, Koji Matsubara, Kakuya Iwata, Akimasa Yamada, Shigeru Niki