Laminated Carbon: an Efficient, Low‐Cost Electrode for Perovskite Solar Cells
Paper ID : 1414-ICNS
Sara Mashhoun *
Nanoparticles & Coatings Laboratory, Sharif University of Technology
Lead halide perovskites are considered promising materials for photovoltaics due to their large absorption coefficient, high charge carrier mobility, and diffusion length as well as easy formation at low temperatures. However, there are serious concerns about the stability issue of perovskite solar cells (PSCs) along with calls to reduce the cost by finding substitutions for vacuum processed metal electrode. Herein, we present low-cost fully-solution-processed PSCs utilizing a laminated carbon electrode with comparable performance and superior lifetime compared to the reference cells with an evaporated top gold (Au) electrode. The composite carbon electrode consisting of carbon paper and a conducting adhesive was applied on the active layer architecture FTO/compact-TiO2/mesoporous-TiO2/FAMAPb(I1-xBrx)3/ Spiro-OMETAD. PSCs with laminated carbon electrode showed a power conversion efficiency (PCE) of 11.6% as compared to 12.8% for the reference cells. By optimizing the interface of carbon paper, the PCE of laminated-electrode-based cell increased to 13%. Stability measurements demonstrated that PSCs with laminated electrode kept 100% of their initial PCE for 15 days in ambient condition with no encapsulation, which decreased to 70% after 20 days while those with Au as top electrode degraded in 7 days.
carbon electrodes; laminate process; perovskite solar cells; low cost fabrication; stability
Status : Abstract Accepted (Poster Presentation)