Temperature-dependent photoluminescence spectra of GaN epitaxial layer grown on Si (111) substrate
Zhao Dan-Mei, Zhao De-Gang†, Jiang De-Sheng, Liu Zong-Shun, Zhu Jian-Jun, Chen Ping, Liu Wei, Li Xiang, Shi Ming
       
Raman spectra of GaN films grown on different substrates or conditions: sample A (red), sample B (black), and sample C (green).