ABSTRACT

Planar perovskite solar cells and modules were realized by using low temperature solution-process fabrication procedures. The photovoltaic performance was improved by optimizing a SnO2 electron transport layer and its interface with the perovskite layer. We achieved a power conversion efficiency (PCE) of 17.3% on small area cell (0.09 cm2) with negligible hysteresis and a steady-state PCE equal to 17.4%. Furthermore, shelf life tests showed a relative decrease of only 5% in PCE from its initial value after 1000 h of storage in dark conditions in air (RH 20%). Up-scaling of the technology was implemented entirely in air with fabrication of modules with a high aperture ratio of 91%. The modules delivered a maximum PCE of 13.1% obtained on an active area of 13.8 cm2and of 11.9% on an aperture area of 15.2 cm2 representing state of art performance for fully low temperature solution processed planar perovskite solar modules.

Emanuele Calabrò, Fabio Matteocci, Alessandro Lorenzo Palma, Luigi Vesce, Babak Taheri, Laura Carlini, Igor Pis, Silvia Nappini, Janardan Dagar, Chiara Battocchio, Thomas M. Brown

DOI: 10.1016/j.solmat.2018.05.001

https://www.sciencedirect.com/science/article/pii/S0927024818302150