High Performance Lead-Reduced Mixed-Cation Perovskite Solar Cells

摘要

In summary, we try to increase the device performance by adding FA~+ to MA~+. As the concentration of MA_(0.8)FA_(0.2) -PbI_(3-y)Cl_y increases, the PCE will increase, and 1.7 M MA_(0.8)FA_(0.2)PbI_(3-y)Cl_y gives the best photovoltaic performance. To get high performance lead-reduced PSCs, we combine Ba~(2+) substitution of Pb~(2+) with 1.7 M MA_(0.8)FA_(0.2) -PbI_(3-y)Cl_y. When 5.0 mol% Ba~(2+) is doped, the best MA_(0.8)FA_(0.2)Ba_(0.05)Pb_(0.95)I_(3-y)Cl_y device gives V_(oc) of 1.06 V, J_(sc) of 22.3 mA/cm~2, FF of 70.4% and PCE of 16.6%.