Growth of highly conductive Al-rich AlGaN:Si with low group-III vacancy concentration oleh Abdullah S. Almogbel, Christian J. Zollner, Burhan K. Saifaddin, Michael Iza, Jianfeng Wang, Yifan Yao, Michael Wang, Humberto Foronda, Igor Prozheev, Filip Tuomisto, Abdulrahman Albadri, Shuji Nakamura, Steven P. DenBaars, James S. Speck