Fig. 1: Device structure and photovoltaic performance of MAPbI3 PSCs.
From: 2D materials for conducting holes from grain boundaries in perovskite solar cells
a, b Structural schematic diagram and energy-level band diagram of a BP-modified PSC with a normal structure. c, d Current density–voltage (J–V) curves (reverse scan) and external quantum efficiency (EQE) spectra of PSCs without (control) and with BP (1–3 times) deposited on the perovskite film surface. e Histogram of the power conversion efficiencies (PCEs) of PSCs without (control) and with the BP modification (2 coats of BP). The PCEs are derived from the reverse scans of the J–V curves. f Average PCE enhancement after the modification of perovskite films with different 2D materials. The error bar corresponds to the standard error for 30 devices
