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Carbon-based top electrodes for hole-transporting-layer-free perovskite solar cells (PSCs) were made by hot press (HP) transfer of a free-standing carbon-aluminum foil at 100 C and at a pressure of 0.1 MPa on a methylammonium lead iodide (MAPbI 3) layer. Under these conditions, the perovskite surface was preserved from interaction with the solvent. Over a timescale of 90 days, HP-PSCs were systematically compared to reference cells with carbon-based top electrodes deposited by doctor blading (DB). We found that all the photovoltaic parameters recorded in HP-PSCs during time under ambient conditions settled on values systematically higher than those measured in the reference DB-PSCs, with efficiency stabilized at around 6% within the first few measurements. On the other hand, in DB-PSCs, a long-lasting (~ 14 days) degrading transient of the performances was observed, with a loss of efficiency from …
Frontiers Media SA
Publication date: 
1 Jan 2020

Salvatore Valastro, Emanuele Smecca, Salvatore Sanzaro, Ioannis Deretzis, Antonino La Magna, Youhei Numata, Ajay Kumar Jena, Tsutomu Miyasaka, Antonio Gagliano, Alessandra Alberti

Biblio References: 
Volume: 8
Frontiers in Chemistry