Structure and band gap engineering of Fe-doped SrSnO3 epitaxial films Qinzhuang Liu, Hong Li, Bing Li, Wei Wang, Qiangchun Liu, Yongxing Zhang and Jianming Dai EPL, 108 3 (2014) 37003 Published online: 05 November 2014 DOI: 10.1209/0295-5075/108/37003