Influences of screw dislocations on electroluminescence of AlGaN/AlN-based UVC LEDs oleh Dong Liu, Sang June Cho, Huilong Zhang, Corey R. Carlos, Akhil R. K. Kalapala, Jeongpil Park, Jisoo Kim, Rafael Dalmau, Jiarui Gong, Baxter Moody, Xudong Wang, John D. Albrecht, Weidong Zhou, Zhenqiang Ma