Tuning the structural and photophysical behaviour of non-toxic CsSnCl3 using reduced graphene oxide for optoelectronic applications

Ajay Kumar; Nivedita Pandey; Deepak Punetha; Rajib Saha; Subhananda Chakrabarti

doi:10.1117/12.2648289

10 March 2023 Tuning the structural and photophysical behavior of non-toxic CsSnCl₃ using reduced graphene oxide for optoelectronic applications

Ajay Kumar, Nivedita Pandey, Deepak Punetha, Rajib Saha, Subhananda Chakrabarti

Author Affiliations +

Proceedings Volume 12415, Physics and Simulation of Optoelectronic Devices XXXI; 124150M (2023) https://doi.org/10.1117/12.2648289
Event: SPIE OPTO, 2023, San Francisco, California, United States

Conference Poster

Abstract

The non-toxic metal halide-based perovskite materials can be a greener alternative to leadbased perovskites because of their stability and high-scale production. Herein, we have tuned the structural and photophysical behaviour of non-toxic halide-based perovskite CsSnCl₃ by forming a heterostructure with reduced graphene oxide (rGO) owing to its high carrier mobility and thermal conductivity. The crystal structure of CsSnCl₃ and CsSnCl₃/rGO heterostructure has been analyzed using the X-ray diffraction (XRD) technique which confirms the formation of a highly crystalline cubic phase. The high absorption behaviour of CsSnCl₃ and CsSnCl3/rGO can be clearly seen from the ultraviolet-visible (UV-vis) spectrum. A direct bandgap of 3.24 eV and 3.19 eV has been calculated from the Tauc plot for CsSnCl₃ and CsSnCl₃/rGO heterostructure respectively. The Photoluminescence (PL) plot shows a high quenching blue shift phenomenon in CsSnCl3/rGO heterostructure as compared to pristine CsSnCl3 material due to the faster separation and transfer of charges from photogenerated electron-hole pairs. Further, the surface morphology of CsSnCl₃ and rGO/CsSnCl₃ heterostructure has been noticed by utilizing the Field Emission Gun-Scanning Electron Microscope (FEG-SEM) representing a very good morphology of synthesized materials in which CsSnCl₃ comprises a granular kind of structure which is spread over the rGO sheet. This study suggests the tenability of structural and optical properties with enhancement in stability of pristine CsSnCl₃ by forming heterostructure with rGO for their future utility in highly stable, and efficient photovoltaic and optical devices.

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Ajay Kumar, Nivedita Pandey, Deepak Punetha, Rajib Saha, and Subhananda Chakrabarti "Tuning the structural and photophysical behavior of non-toxic CsSnCl₃ using reduced graphene oxide for optoelectronic applications", Proc. SPIE 12415, Physics and Simulation of Optoelectronic Devices XXXI, 124150M (10 March 2023); https://doi.org/10.1117/12.2648289

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