Perovskite solar cell performance assessment

Astounding progress in achieved power conversion efficiencies of solar cells based on metal-halide perovskite semiconductors has been achieved. Viable assessment of the long-term device performance is, therefore, now the most critical aspect to reliably predict device's long-term performance. Standard testing protocols to enable cross-laboratory comparison need to be established and adopted. Apart from protocols targeting the assessment of device performance and stability, procedures to investigate potential meta-stabilities in devices under different operation conditions are required to describe degradation mechanisms. This understanding will guide further optimization of materials and devices. In this perspective, we emphasize the importance of wide-spread reporting of experimental data in common databases to keep track of the state-of-the-art of perovskite solar cell performance and stability achieved.