Proceedings of International Conference on Hybrid and Organic Photovoltaics (HOPV24)
Publication date: 6th February 2024
Carbon-based hole transport layer (HTL)-free printable perovskite solar cells (CPSCs) hold significant promise for commercialization thanks to their outstanding stability, low cost and scalable manufacturing.[1] In a standard CPSCs fabrication process, a compact TiO2 layer (c-TiO2) is usually created through spray pyrolysis, followed by the sequential screen printing of TiO2, ZrO2, and carbon layers to establish a mesoscopic scaffold for perovskite precursor infiltration.[2] In this study, the easily scalable screen-printing techniques are also employed to produce the c-TiO2 layer. Furthermore, to enhance commercial viability, perovskite infiltration is carried out entirely in ambient conditions. A two-step method is opted to obtain better pore filling and more uniform morphology of MAPbI3 perovskite absorber.[3] Enhancing the efficiency of CPSCs requires fine-tuning the thickness of scaffold layers and optimizing perovskite absorber formation, which involves adjusting various parameters including loading PbI2 amount, substrate and precursor temperature, annealing conditions, and immersion duration. Optimization of these parameters is crucial to achieve high-efficiency CPSCs fabricated under ambient conditions.
This work was supported by the Jane and Aatos Erkko Foundation and Technology Industries of Finland Centennial Foundation for CAPRINT project funding (#2430354811).
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