SEMINAIRE LMGP - 21.11.2022 - Prof. Dr. Aldo Di Carlo

“Mastering the performance and stability of perovskite photovoltaics with 2D materials”


Prof. Dr. Aldo Di Carlo

Head of the Institute for Structure of the Matter of the Italian National Research Council (CNR-ISM), Rome, Italy
Centre for Hybrid and Organic Solar Energy, Department of Electronics Engineering, University of Rome “Tor Vergata”, Rome, Italy.


Abstract

The large library of two-dimensional materials can be exploited to master interface properties of perovskite solar cells. 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 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). 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 n-i-p [1] and p-i-n [2] cells structure and exploited on large area modules [3]. We show that MXene interface engineering used on the n side of p-i-n cell (NiO/perovskite/C60/BCP/Cu) permits 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 outdoor test in a real environment will be presented and performance and stability will be discussed.
 

References

[1] Agresti, A., Pazniak, A., Pescetelli, S. et al. Nat. Mater. 18, 1228–1234 (2019).
[2] D. Saranin et al. Nano Energy 82, 105771 (2021)
[3] S. Pescetelli et al. Nano Energy 95, 107019 (2022)
[4] A. Yukasheva, D. Saranin et al. Small 18, 2201730 (2022)
[5 ] Pescetelli, S., Agresti, A., et al. Nat Energy 7, 597–607 (2022).

       
      

 



Infos date
Grenoble INP - Phelma
3 parvis Louis Néel - 38000 Grenoble
Accès : TRAM B arrêt Cité internationale
Infos lieu
14H - Salle des Séminaires
2ème étage - LMGP