New Frontiers for Perovskite Solar Cells: From Adhesion to Interfacial Fracture and Processing Effects on Device Performances

Ichwani, Reisya

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New Frontiers for Perovskite Solar Cells: From Adhesion to Interfacial Fracture and Processing Effects on Device Performances

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Perovskites are promising alternative materials to the silicon counterparts for making solar cells. Photovoltaic community has been focused on improving the power conversion efficiency and stability of perovskite solar cells (PSCs) over a decade. On the way from lab to market, highly efficient and stable of perovskite solar cells is not enough for PSCs to be realized. Reliability and scalability are important factors to be improved to bring a mature technology to the market. Interfaces of PSCs multilayer stack are one of problematic issues that can reduce the performance and durability of PSCs. The interfacial reliability of PSCs will be discussed with the results of adhesion interactions in nanoscale and interfacial fracture toughness in macroscale, and its associated toughening mechanisms as the effect of different processing of perovskite active layers. In terms of scalability, PSCs have potentials to be commercially grown using spray fabrication method that involves various parameters: nozzle speed, head-substrate spacing distance, substrate temperature, and applied pressure after spraying to produce a compact structure of perovskite active layer. Those various parameters are suitable for a data science framework for enabling process optimization with purpose of PSCs manufacturing with shorter timescale and lower experimental cost that was previously made. The results of optimization of spray-deposited perovskites conditions, interfacial properties, and toughening mechanism at interfaces of perovskite and charge transport layers, as well as machine learning model development of spray parameters optimization will be discussed as they relate to spray-assisted PSCs performances.

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