GaN substrate and GaN homo-epitaxy for LEDs: Progress and challenges<xref ref-type="fn" rid="cpb150941fn1">*</xref>

GaN substrate and GaN homo-epitaxy for LEDs: Progress and challenges*

Wu Jie-Jun, Wang Kun, Yu Tong-Jun†, Zhang Guo-Yi

Photographs of 1-inch and 1.5-inch wafers by the basic ammonothermal method.^{[ 17 ]}