Leila Rizzo
Optimization of transport layers and interfaces in FAPbI3 based perovskite solar cells.
Rel. Elena Maria Tresso. Politecnico di Torino, Master of science program in Nanotechnologies For Icts, 2025
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Abstract
Perovskite solar cells (PSCs) are a promising photovoltaic technology with the potential to achieve high power conversion efficiencies while maintaining a low-cost fabrication process. However, a critical performance bottleneck in PSCs is the high defect density at the interface between the perovskite absorber and the charge transport layers, leading to significant non-radiative recombination and thus limiting the overall efficiency. In this research, formamidinium lead triiodide (FAPbI3) has been investigated as a perovskite composition with a suitable bandgap for high-efficiency single-junction devices. This work explored strategies to mitigate interfacial recombination losses to enhance efficiency. The quality of the interfaces was analyzed through photoluminescence measurements.
While the bare perovskite on glass exhibited a strong photoluminescence signal, the addition of the hole transport layer (HTL) 2,2',7,7'-tetrakis(N,N-di-pmethoxyphenyl- amine)9,9'-spirobifluorene (Spiro-MeOTAD) increases the non-radiative recombination
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