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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