Since the isolation of free standing graphene in 2004, graphene research has experienced a phenomenal growth.

Perovskite solar cells (PSCs) have proved their potential for delivering high power conversion efficiencies (PCE) alongside with low fabrication cost and high versatility. The stability and the efficiency of PSCs...

Perovskite solar cells (PSCs) have reshaped the thin-film photovoltaic technology owning to their exceptional high power conversion efficiency (PCE) in conjunction with their low-cost and facile production. PSCs are fabricated...

We report a cooperative study conducted between different laboratories to investigate organic solar cell degradation with respect to P3HT material properties and different solar cell architectures. Various batches of P3HT were collected from different suppliers reflecting commercial availability as well as properties variability. Among the materials properties explicitly considered were the molar mass, dispersity, regio-regularity, impurities by trace metals and intrinsic doping evaluated from radical concentrations. Each of the participating laboratories contributing test devices applied their own layer stack, i.e. their own device architecture and layout. This variation was appreciated as another parameter for evaluation. Even though a large amount of devices failed due to extrinsic degradation effects, indeed, some materials properties were found to be more important than others for obtaining long lifetimes and high stability of P3HT-based polymer solar cells.