This Authorea document template can be used to prepare documents according to the citation style and authoring guidelines of Numerical  analysis of highly efficient lead-free Cs2SnI6 based perovskite  solar cells with fullerene C60 as an inverted hole-free transport  layer by SCAPS-1D             . Note: the citation style and format (paragraph spacing, line numbers, etc.) will be applied upon document export, making it easy for you to switch from one journal to another.