Giulia Grancini1
University of Pavia1
Three-dimensional (3D)/low-dimensional (LD) perovskite solar cells (PSCs) offer an effective strategy to overcome the trade-off between perovskite solar cells device performance and stability. Improving the device longevity, while concomitantly simultaneously enhancing increasing the solar cell open circuit voltage and fill factor of the solar cell is the current challenge. Despite being one of the most popular and effective way processing techniques, whether the presence of this surface LDP layer would be - or not-represents the winning crucial path for the future of this technology remains elusive. In particular, atomic layer combined surface and bulk passivation using surface modifiers such as organic dopants, casts the doubts on the effective need for of having an homogeneous LDP cover capping layer. In this talk, I will discuss the interfacial passivation with different cations such as M-PEAI, M-PEABr, and M-PEACl, showing the role of the passivation and how different halides affect the device performance of the devices. In addition, I will discuss the use of low-dimensional carbon based systems - such as graphene monolayers- as additional interfacial modifiers on top of the 2D perovskites.. I will providing a comprehensive perspective on the benefits from of the passivation strategies, showing the effects on the interface processes such as charge transport[1,2].<br/><br/>Acknowledgements I acknowledge the “HY-NANO” project that has received funding from the European Research Council (ERC) Starting Grant 2018 under the European Union’s Horizon 2020 research and innovation programme (Grant agreement No. 802862).<br/><br/>Reference<br/>[1] Degani et al, Sci Advances 7, 49, 2021<br/>[2] Zanetta et al, submitted