Interrelated Characterizations of 2D/3D Perovskite Solar Cells Aged Under Damp Heat Conditions

Among alternative device structures, carbon-based perovskite solar cells look highly promising due to their inherent high stability. A one step perovskite solution with ammonium valeric acid iodide additive was pipetted to infiltrate the mesoporous layers through the carbon layer. To further investigate their stability, aging campaigns at 85°C/85%RH have been conducted during 1000 h. In this study, matured encapsulated system based on glass and a surlyn gasket was used, enabling the humidity permeation up to solar cells and inducing probably an accelerated degradation of devices. Thanks to dedicated characterization techniques, the local performances have been correlated to the degradation inhomogeneity.