Improved eco-friendly CsSn0.5Ge0.5I3 perovskite photovoltaic efficiency beyond 20% with SMe-TATPyr hole-transporting layer

Perovskites composed of inorganic cesium (Cs) halide provide a route to thermally resistant solar cells. Nevertheless, the use of hole-transporting layers (HTLs) with hydrophobic additives is constrained by moisture-induced phase deterioration. Due to significant electrical loss, dopant-free HTLs ar...

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Published in:Physical chemistry chemical physics : PCCP 2024-01, Vol.26 (4), p.3229-3239
Main Authors: Mohammed, Mustafa K A, Al-Gazally, Moaed E, Khaleel, Omar A, Al-Mousoi, Ali K, Zuhair Mohammed Ali Jeddoa, Hasan Sh Majdi, Jabir, Majid S, M Khalid Hossain, Hatshan, Mohammad Rafe, Md Ferdous Rahman, Dastan, Davoud
Format: Article
Language:English
Subjects:
Additives
Cesium
Energy conversion efficiency
Fluorine
Germanium
Lead free
Perovskites
Photovoltaic cells
Solar cells
Thickness
Tin
Tin oxides
Titanium dioxide
Valence band
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Summary:Perovskites composed of inorganic cesium (Cs) halide provide a route to thermally resistant solar cells. Nevertheless, the use of hole-transporting layers (HTLs) with hydrophobic additives is constrained by moisture-induced phase deterioration. Due to significant electrical loss, dopant-free HTLs are unable to produce practical solar cells. In this article, we designed a two-dimensional 1,3,6,8-tetrakis[5-(N,N-di(p-(methylthio)phenyl)amino-p-phenyl)-thiophen-2-yl]pyrene (termed SMe-TATPyr) molecule as a new HTL to regulate electrical loss in lead-free perovskite solar cells (PSCs). We optimized the power conversion efficiency (PCE) of PSCs based on mixed tin (Sn)/germanium (Ge) halide perovskite (CsSn0.5Ge0.5I3) by exploring different factors, such as the deep and shallow levels of defects, density of states at the valence band (NV), thickness of the perovskite film, p-type doping concentration (NA) of HTL, the series and shunt resistances, and so on. We carried out comparative research by employing the 1D-SCAPS (a solar cell capacitance simulator) analysis tool. Through optimization of the PSC, we obtained the highest parameters in the simulated solar cell structure of fluorine tin oxide (FTO)/titanium dioxide (TiO2)/CsSn0.5Ge0.5I3/SMe-TATPyr/gold (Au), and the PCE reached up to 20% with a fill factor (FF) of 81.89%.
ISSN:1463-9076
1463-9084
DOI:10.1039/d3cp05445d