Synthesis and characterization study of a novel lead-free hybrid organic-inorganic halide double perovskite (MA)2NaBiCl6 for photonics applications

Neelu Sharma; Nivedita Pandey; Subhananda Chakrabarti

doi:10.1117/12.3004210

30 November 2023 Synthesis and characterization study of a novel lead-free hybrid organic-inorganic halide double perovskite (MA)₂NaBiCl₆ for photonics applications

Neelu Sharma, Nivedita Pandey, Subhananda Chakrabarti

Author Affiliations +

Proceedings Volume 12796, Functional Material Applications: From Energy to Sensing; 127960H (2023) https://doi.org/10.1117/12.3004210
Event: SPIE Photonex, 2023, Glasgow, United Kingdom

Conference Poster

Abstract

In the last decade, lead perovskites have shown a remarkable performance in photovoltaic applications, but they are vulnerable to stability problems. Therefore, in order to obtain lead-free materials that could successfully replace the single perovskites, we have experimentally realized methylammonium (MA) based double perovskite (MA)₂NaBiCl₆ for the very first time by the single-step method of hydrothermal which could be a potential analog of lead-based single perovskite for various semiconducting applications. We have investigated the structural characteristics of ((MA)₂NaBiCl₆ from X-Ray Diffraction (XRD) measurement. The observed diffraction peaks confirm the phase formation of the (MA)₂NaBiCl₆ and are in accordance with the reference data. To look into the optical behavior of (MA)₂NaBiCl₆, we have done a room temperature Photoluminescence (PL) spectroscopy experiment and observed a broad PL peak at 480 eV corresponding to an optical band gap of 2.58 eV attributed to the phenomena of phonon-assisted carrier recombination and band-to-band transition in the synthesized material. Moreover, an excellent absorbance peak has been seen from the ultraviolet-visible (UV-vis) spectroscopy plot. Furthermore, a direct and indirect bandgap of 2.25 eV and 2.01 eV respectively has been observed from the Tauc plot extracted using UV-vis data. Also, we have observed a good transmittance behavior from Fourier Transform Infrared (FTIR) spectroscopy plot. The Scanning Electron Microscopy (SEM) images were observed for (MA)₂NaBiCl₆ which indicate the presence of a uniform nanorod-like structure. This novel finding provides a stable and greener alternative for lead halide-based single perovskite to the research and scientific community for numerous semiconducting applications.

(2023) Published by SPIE. Downloading of the abstract is permitted for personal use only.

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Neelu Sharma, Nivedita Pandey, and Subhananda Chakrabarti "Synthesis and characterization study of a novel lead-free hybrid organic-inorganic halide double perovskite (MA)₂NaBiCl₆ for photonics applications", Proc. SPIE 12796, Functional Material Applications: From Energy to Sensing, 127960H (30 November 2023); https://doi.org/10.1117/12.3004210

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