Perovskite solar cells are one of the most promising solar cell technologies, showing rapid development in power conversion efficiency (PCE). In this work, the performance and stability of triple-cation perovskite solar cells under continuous outdoor illumination in Bahir Dar climatic conditions and also the luminescence properties using steady-state photoluminescence (PL) spectroscopy has been studied. The work is conducted to study the electrical characterisation of the device under investigation in outdoor testing under ambient conditions to study the open-circuit voltage, short-circuit current density, fill factor, and efficiency of the device and obtained a PCE of above 16%, and a fill factor of above 60% with strong PL peak emission at 757 nm.