JIAN-JANG HUANGCHIH-CHUNG YANG2018-09-102018-09-102008-07http://scholars.lib.ntu.edu.tw/handle/123456789/340870Improvement of External Extraction Efficiency in GaN-Based LEDs by <formula formulatype="inline"><tex Notation="TeX">$ \\hbox{SiO}_{2}$</tex></formula> Nanosphere Lithographyjournal article10.1109/led.2008.2000918