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

Abstract

We present the functionalization process of a conductive and transparent CuAlO2/Cu–O hole-transporting layer (HTL). The CuAlO2/Cu–O powders were developed by flame spray pyrolysis and their stabilized dispersions were treated by sonication and centrifugation methods. We show that when the supernatant part of the treated CuAlO2/Cu–O dispersions is used for the development of CuAlO2/Cu–O HTLs the corresponding inverted perovskite-based solar cells show improved functionality and power conversion efficiency of up to 16.3% with negligible hysteresis effect.

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.…”

A Cu2O–CuSCN Nanocomposite as a Hole-Transport Material of Perovskite Solar Cells for Enhanced Carrier Transport and Suppressed Interfacial Degradation

“…In the case of the nanocomposite material, the band gap is ∼2.2 eV, which deviates from that of Cu 2 O (∼2.1 eV), possibly due to a structural disorder or changed bonding nature caused by the coexistence of O and S components. 49,50 Figure 2(b,c) shows the electronic structure of individual and nanocomposite materials. As illustrated, the work functions and valance-band maxima (VBM) of the nanocomposite and CuSCN are similar, due to the effective nanometer-scale depth of ultraviolet photoelectron spectroscopy (UPS).…”

Interfaces and Interfacial Layers in Inorganic Perovskite Solar Cells

“…However,o rganic HTLs,e ither spiro-OMeTAD or other dopant-free alternatives,a re still sensitive to ambient atmosphere and temperature,a nd some of them are expensive. [22] From ap ractical point of view,i ti so fg reat significance to develop inorganic HTLs with low cost and robust environmental stability.I norganic p-type semiconductors,s uch as NiO x , [28] CuI, [29] CuSCN, [30] CuO x , [31] Co 3 O 4 , [32] and delafossite materials (ABO 2 ,A= Cu + ,B= Al 3+ , [33] Cr 3+ , [34] Ga 3+ , [35] etc.) have all been applied as HTLs in inorganic PSCs,all of which show significantly improved device stability.A mong them, NiO x has gained great attention because of its suitable valence band for hole injection.…”