Supported by National Natural Science Foundation of China(11574301,61274008,61674147,11404239);the Opening Project of Guangxi Key Laboratory of Precision Navigation Technology and Application;the National Science Foundation for Post-doctoral Scientists of China(2016M600231);National Natural Sciences Foundation of Tianjin(14JCQNJC01000)
supported by the National Natural Science Foundation of China(Nos.61274040,61274008);the National Basic Research Program of China(No.2011CB301902);the National High Technology Program of China(No.2011AA03A103)
The light extraction enhancement of freestanding GaN-based flip-chip light-emitting diodes (FS- FCLEDs) using two-step roughening methods is investigated. The output power of LEDs fabricated by using one-step and tw...