Methylammonium Compensation Effects in MAPbI Perovskite Solar Cells for High-Quality Inorganic CuSCN Hole Transport Layers.

Recent studies have demonstrated that copper (I) thiocyanate (CuSCN) has huge potential as a hole extraction material (HEM) for perovskite solar cells. Here, we used CuSCN as a HEM and analyzed its relationships with a methylammonium lead iodide (MAPbI) perovskite layer. The CuSCN dissolved in diethyl sulfide (DES) was spin-coated on the MAPbI layer.