50% Sn‐Based Planar Perovskite Solar Cell with Power Conversion Efficiency up to 13.6%. Issue 24 (29th August 2016) - Li, Yunlong
Abstract : In the present work, a Pb‐assisted two step method is successfully proposed to fabricate high‐quality CH3 NH3 Sn0.5 Pb0.5 I3 (MASn0.5 Pb0.5 I3 ) perovskite film on the indium tin oxide (ITO) glass/poly(3, 4‐ethylenedioxythiophene):poly(styrene sulfonate) (PEDOT:PSS) substrate. The film shows regular crystalline grains with a flat and compact morphology as well as full coverage on the planar PEDOT:PSS substrate. Remarkably, corresponding devices ITO/PEDOT:PSS/MASn0.5 Pb0.5 I3 /C60 /2, 9‐dimethyl‐4, 7‐diphenyl‐1, 10‐phenanthroline/Ag are fabricated with high reproducibility, achieving a high power conversion efficiency of 13.6%, which is, to the best of knowledge, the most efficient solar cell based on Sn‐based perovskite. Abstract : A high efficiency inverted planar Sn‐based perovskite solar cell is fabricated by utilizing a two‐step solution processing technique. Through use of PbI2 in combination with SnI2, the Sn‐based perovskite film quality is improved obviously. The lead contents are successfully reduced to 50% in the perovskite layer, and the power conversion efficiency of the best corresponding device reaches up to 13.6%.