Enhanced light extraction of GaN-based light-emitting diodes with periodic textured SiO2 on Al-doped ZnO transparent conductive layer
Zhao Yu1, 2, †, , Fan Bingfeng1, †, , Chen Yiting1, Zhuo Yi1, Pang Zhoujun2, Liu Zhen2, Wang Gang1, ‡,
       

(a) Cross-section SEM image and (b) top view SEM image of the surface patterned LED chip with AZO-TCL.