Nanostructured bismuth chloride based ((CH3NH3)3Bi2IxCl9-x) active layers for lead-free perovskite solar cells Pavithrakumar Palanichamy, Venkatraman Madurai Ramakrishnan, Rajesh Govindaraj, Agilan Santhanam, Dhayalan Velauthapillai Zeitschrift Fur Physikalische Chemie, 2025 Bismuth is one of the promising elements that can replace toxic lead in perovskite solar cells. However, surface roughness and inhomogeneous morphology with voids on the bismuth perovskite films limits their photovoltaic performance. In the present work, a scalable doctor-blade technique is employed to prepare perovskite thin film with high surface coverage. Methylammonium bismuth halide (MABiH) ((CH3NH3)3Bi2ClxI9-x) nanoparticles were synthesized by conventional sol-gel technique. The formation of perovskite structure was confirmed by X-ray diffraction measurement which confirmed that MABiH perovskite films were in hexagonal symmetry with polycrystalline nature. The prepared perovskite nanoparticles were deposited on mesoporous TiO2-coated FTO substrates through the spin coating technique and doctor blade method. Morphology analysis of MABiH perovskite revealed the formation of an orange Lily-like structure with higher surface coverage. Lead-free mesoporous perovskite solar cells prepared using MABiH perovskite material with carbon as hole extraction layer showed a maximum power conversion efficiency (PCE) of 0.004 %, with short circuit current density of 89 μA/cm2, open circuit voltage of 0.12 V and fill factor of 38 %. These results allow us to step toward fabricating bulk MABiH lead-free perovskite solar cells.
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MOST CITED SCHOLAR PUBLICATIONS
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Rubik’s cube shaped organic template free hydrothermal synthesis and characterization of zeolite NaA for CO2 adsorption J Madhu, VM Ramakrishnan, P Palanichamy, A Santhanam, M Natarajan, ... Fuel 317, 123492 , 2022 2022 Citations: 17
Semi-transparent dye-sensitized solar cells (DSSC) for energy-efficient windows with microwave-prepared TiO2 nanoparticles as photoanodes MR Venkatraman, G Rajesh, S Rajkumar, MR Ananthan, G Balaji Materials Letters 360, 135953 , 2024 2024 Citations: 15
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