Investigation on AgGaSe2 for water splitting from first-principles calculations Dan Huang, Clas Persson, Zhiping Ju, Maofeng Dou, Chunmei Yao and Jin Guo EPL, 105 3 (2014) 37007 Published online: 24 February 2014 DOI: 10.1209/0295-5075/105/37007