title: [Photoionization spectrum measurement and analysis of deep level in GaN epilayers].
authors.affiliation: School of Electronic Science and Technology, Anhui University, Hefei 230039, China. iwangying@163.com
authors.forename: Ying
authors.initials: Y
authors.lastname: Wang
authors.forename: Su-yun
authors.initials: SY
authors.lastname: Li
authors.forename: Zhi-jun
authors.initials: ZJ
authors.lastname: Yin