MXenes and other two-dimensional materials for perovskite photovoltaics
Aldo Di Carlo a
a ISM-CNR and CHOSE - Centre for Hybrid and Organic Solar Energy, University of Rome ‘‘Tor Vergata’’, IT, Via Cracovia, 50, Roma, Italy
nanoGe Fall Meeting
Proceedings of Materials for Sustainable Development Conference (MAT-SUS) (NFM22)
#2DNanoMat - 2D Nanomaterials for Energy and Environmental Applications
Barcelona, Spain, 2022 October 24th - 28th
Invited Speaker, Aldo Di Carlo, presentation 255
Publication date: 11th July 2022

The large library of two-dimensional materials can be exploited to master interface properties of perovskite solar cells. Here, I will present the results of the use of 2D materials in perovskite cells, modules and panels. In particular I will focus on a new class of 2D, namely Titanium Carbide MXenes (such as Ti3C2). Beside exceptional chemical and mechanical properties, MXenes offer a wide tunabilty of work function (WF) by varying their surface termination. WF can ranges from ≈2 eV (for OH-termination) to ≈6 eV (for O-termination). In particular, by producing well exfoliated Ti3C2Tx MXenes with a relatively low WF (~3.7eV) we demonstrate the capability to tune both perovskite absorber and electron transporting layer (ETL) WFs.[1] This strategy has been applied to nip [1] and pin [2] cells structure and exploited on large area modules [3]. We show that MXene interface engineering used on the n side of pin cell (NiO/perovskite/C60/BCP/Cu) permitx to increase enormously the stability of the cell with a T90 exceeding the 2000 h under continuous light soaking at Maximum Power Point (in ambient conditions) and T80>1000h for thermal stress (85 °C). [4]

The use of a combination of 2D materials to improve performance and stability of perovskite technology has been extended to panels (9 panels of 0.5 sqm each) that have been tested for more than a year in a Solar Farm in Crete.[5] The results of this outodoor test in a real environment will be presented and performance and stability will be discussed.

I gratefully acknowledges the support of European Union’s Horizon 2020 research and innovation programme under grant agreement number 881603—GrapheneCore3

We use our own and third party cookies for analysing and measuring usage of our website to improve our services. If you continue browsing, we consider accepting its use. You can check our Cookies Policy in which you will also find how to configure your web browser for the use of cookies. More info