Dr. Aldo Di Carlo
Professor of Optoelectronics and Nanoelectronics
Co-director of the Centre for Hybrid and Organic Solar Energy (CHOSE)
Department Electronics Engineering
University of Rome Tor Vergata, Rome
Graphene and 2D materials for perovskite solar cells and modules
Abstract
CHOSE – Centre for Hybrid and Organic Solar Energy, University of Rome “Tor Vergata”, via del Politecnico 1, 00133 Roma, Italy aldo.dicarlo@uniroma2.it
In the energy field, the use of hybrid perovskite materials such as CH3NH3PbI3 has opened up new directions to fabricate cost effective and high efficient photovoltaic devices. Recent studies demonstrated that interface between layers forming Perovskite Solar Cells (PSCs) are crucial for the control of efficiency and stability of the cell. Owing to the bi-dimensional nature of Graphene and Related Materials (GRM), a new paradigm to tailor interface properties based on GRM was recently proposed and applied to PSC and modules with the aim to increase both power conversion efficiency (PCE) and stability of PSCs. [1-3] By dispersing Graphene flakes, produced by liquid phase exfoliation of pristine graphite, into the mesoporous TiO2 layer and by inserting graphene oxide (GO) as interlayer between perovskite and Spiro-OMeTAD layers, we demonstrate a PCE of 19.4%[2]. The proposed interface engineering strategy based on GRM has been exploited for the fabrication of state-of-the-art large area perovskite modules with a PCE of 12.6% on an active area exceeding 50 cm2. [3]
References
[1] A. Agresti et al., Advanced Functional Materials 2016, 26, 2686; A. Capasso et al. Adv. Energy Mat. 2016, 6, 1600920; T. Gatti et al. Adv. Funct. Mat. 2016, 26, 7443-7453; A. L. Palma et al. Nano Energy 2016, 22, 349
[2] A. Agresti et al. ChemSusChem 2016, 9, 2609
[3] A. Agresti et al. ACS Energy Lett. 2017, 2, 279−287