(168)Low-temperature SnO2-based electron selective contact for efficient and stable perovskite solar cells, Jiaxing Song,a Enqiang Zheng,b Ji Bian,a Xiao-Feng Wang,*b Wenjing Tian,*a Yoshitaka Sanehirac, Tsutomu Miyasakac, J. Mater. Chem. A, 2015, 3, 10837-10844.