Enhancing Efficiency and Stability of Lead-Free Sn-Perovskite Solar Cells
Muhammad Okash Ur Rehman a
a Department of Chemical, Materials and Production Engineering, University of Naples Federico II, Piazzale Tecchio 80, 80125, Fuorigrotta, Italy
Materials for Sustainable Development Conference (MATSUS)
Proceedings of MATSUS Fall 2024 Conference (MATSUSFall24)
#PeroMAT- Halide perovskite and perovskite- inspired materials: synthesis and applications
Lausanne, Switzerland, 2024 November 12th - 15th
Organizers: Raquel Galian, Lakshminarayana Polavarapu and Paola Vivo
Oral, Muhammad Okash Ur Rehman, presentation 130
DOI: https://doi.org/10.29363/nanoge.matsusfall.2024.130
Publication date: 28th August 2024

Perovskite solar cells (PCSc) have emerged as a highly promising photovoltaic technology due to their cost effective fabrication processes and remarkable power conversion efficiencies. In 2009, PSCs were initially proposed as visible light sensitisers for photovoltaics, with 3.8% power conversion efficiency (PCE) at the laboratory scale to date, reaching an extraordinary 26.1%. However, the environmental and health concerns are associated with lead (Pb) in high performing PCSs. Tin perovskite solar cells (Sn-PSCs) are considered as eco friendly alternatives to Pb based PSCs. Ploy (3,4-ethylenedioxythiophene) polystyrene sulphonic acid (PEDOT.PSS) as hole transport layer (HTL) and dimethyl sulfoxide (DMSO) employed for Sn-PCSs approaching 15% but they are leading towards fast Sn oxidisations. Here we presented the PEDOT.SS and DMSO free compositions FA0.95EDAI0.05SnI3 in p-i-n structure for Sn-PSCs. The perovskite film achieved good morphology using ploy (3,4-ethylenedioxythiophene) as HTL along with Al2O3 nanoparticles as inter layer in a DMSO-free solvent system. The fabricated device achieved a remarkable PCE of 8.72 % under simulated AM 1.5G illumination.

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