Long Thermal Stability of Inverted Perovskite Photovoltaics Incorporating Fullerene‐Based Diffusion Blocking Layer

Abstract

In this article, the stability of p-i-n perovskite solar cells is studied under accelerated heat lifetime conditions (60 o C ,85 o C and N2 atmosphere). By using a combination of buffer layer engineering, impedance spectroscopy and other characterization techniques, we propose the interaction of the perovskite active layer with the top Al metal electrode through diffusion mechanisms as the major thermal degradation pathway for planar inverted perovskite photovoltaics (PVs) under 85 o C heat conditions. We show that by using thick solution processed fullerene buffer layer the perovskite active layer can be isolated from the top metal electrode and improve the lifetime performance of the inverted perovskite photovoltaics at 85 o C. Finally, we

Influence of Chloride/Iodide Ratio in MAPbI3-xClx Perovskite Solar Devices: Case of Low Temperature Processable AZO Sub-Layer

“…This specific AZO layer has however already proven its potential as ETL. The exact same commercial reference has been used with success in both organic and perovskite cells, but usually in inverted architectures [57][58][59]. In addition, other low temperature processed AZO materials made by completely different methods [60] have already been used as ETL in normal PSC architecture setups close to the one studied in this paper.…”

Inverted Perovskite Photovoltaics Using Flame Spray Pyrolysis Solution Based CuAlO2/Cu–O Hole-Selective Contact

“…We have proposed thick fullerenes diffusion blocking layers to improve the thermal stability of inverted perovskite PVs. 49…”

Electron/hole blocking layers as ionic blocking layers in perovskite solar cells

“…In the context of device stability there are several experimental reports highlighting the process of ion migration into the electron/hole blocking layers. 18,19,34 Hence, while most simulation results, today, contain the ''hidden'' assumption that the electron/hole blocking layers also function as ion blocking, we will examine the effect of ion migration into the electron/hole blocking layers. 35 This work was primarily inspired by Rivkin et al 19 who quantified the anion density within the hole blocking layer (HBL) and by Galatopoulos et al 18 which showed that the HBL may function as an ion blocking layer (IBL) too.…”