Status of GaN-based green light-emitting diodes*
Liu Jun-Lin, Zhang Jian-Li†, Wang Guang-Xu, Mo Chun-Lan, Xu Long-Quan, Ding Jie, Quan Zhi-Jue, Wang Xiao-Lan, Pan Shuan, Zheng Chang-Da, Wu Xiao-Ming, Fang Wen-Qing, Jiang Feng-Yi
       
Images of V-pits: (a) schematic 3D view, (b) schematic cross section, (c) AFM image of surface, and (d) SEM image of a V-pit cross section.