Using the spray pyrolysis process

the work shows the production of pristine and 6% Ag-doped methylammonium lead iodide bromide (MAPbI2Br) film. Through X-ray diffraction analysis

it was found that Ag doping led to a significant increase in grain size to 29.64 nm

alongside reductions in dislocation line density to 5.39 × 1014 m−2 and d-spacing to 3.18 Å

while maintaining the native cubic crystal structure of MAPbI2Br. This research demonstrates a reduction in deep-level trap states with Ag doping

along with a significant narrowing of the band gap to 1.91 eV in the 6% Ag-doped MAPbI2Br. Moreover

the refractive index and extinction coefficient increased to 2.54 and 2.13

respectively. Regarding solar cell performance

all cells demonstrated encouraging outcomes; still

the 6% Ag-doped cell distinguished itself with a fill factor of 0.82

an open-circuit voltage of 1.07 V

an outstanding short-circuit current density of 11.31 mA/cm²

and an efficiency of 10.03%. These results highlight the effectiveness of Ag doping in improving perovskite solar cell technology

marking a notable progress in this field.