Surface oxidized Ti3C2 MXene: Lead-free Cs2AgBiBr6 double perovskite solar cell efficiency enhanced by interfacial engineering

•A bi-phasic titanium carbide MXene fabricated by thermal oxidation process.•TiO2-Ti3C2 MXene material shows excellent light harvesting behaviour.•The MXene interfacial layer as improve the interfacial electron extraction.•The surface oxidized interfacial layer is achieved high 1.06 Voc and 1.31% PC...

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Bibliographic Details
Published in:Materials letters 2023-12, Vol.352, p.135167, Article 135167
Main Authors: Eswaramoorthy, Nandhakumar, Rajendran, Sathish, Elangovan, Vivek, Kumar Bhunia, Susanta, Pitchaiya, Selvakumar, Rajaram, Kamatchi
Format: Article
Language:English
Subjects:
Cs2AgBiBr6 material
Interfaces
Interfacial engineering
Solar energy materials
Surface oxidized TiO2-Ti3C2
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Summary:•A bi-phasic titanium carbide MXene fabricated by thermal oxidation process.•TiO2-Ti3C2 MXene material shows excellent light harvesting behaviour.•The MXene interfacial layer as improve the interfacial electron extraction.•The surface oxidized interfacial layer is achieved high 1.06 Voc and 1.31% PCE. In this study, thermal oxidation method is followed to prepare surface oxidized titanium carbide (TiO2-Ti3C2) nanomaterial. Here, the formation of anatase phase TiO2 nanoparticles over the surfaces of Ti3C2 MXene is confirmed by UV–Vis, FT-IR, XRD and FE-SEM and HR-TEM studies. The TiO2-Ti3C2 MXene acts an interfacial layer in double perovskite solar cell that exhibits high open circuit voltage (Voc of 1.01 V), short circuit current density (Jsc of 2.64 mA/cm−2), fill factor (FF of 0.55) and power conversion efficiency (PCE of 1.35%) under ambient conditions. Hence, we suggest that this surface modified material will be useful for double perovskite photovoltaics applications.
ISSN:0167-577X
1873-4979
DOI:10.1016/j.matlet.2023.135167