Effects of Different Solvents on the Planar Hetero-junction Perovskite Solar CellsShunquan Lin, Wei Li, Haocheng Sun, Wei Xu, Wenping Guo, Min Xia and Kecheng YangMATEC Web of Conferences, 22 (2015) 05002DOI: https://doi.org/10.1051/matecconf/20152205002