Perovskite solar modules: a new era for thin film PV technology
Fabio Matteocci a, Emanuele Calabrò a, Luigi Vesce a, Alessandro Lorenzo Palma a, Valentina Mirruzzo a, Enrico Lamanna a, Aldo Di carlo a
a CHOSE - Centre for Hybrid and Organic Solar Energy, University of Rome ‘‘Tor Vergata’’, Via del Politecnico, 1, Roma, Italy
International Conference on Hybrid and Organic Photovoltaics
Proceedings of International Conference on Hybrid and Organic Photovoltaics (HOPV18)
Benidorm, Spain, 2018 May 28th - 31st
Organizers: Emilio Palomares and Rene Janssen
Oral, Fabio Matteocci, presentation 181
Publication date: 21st February 2018

This work is based on the development and characterization of perovskite solar modules. In particular, we report on the state of art of the PV performance for modules on a substrate area of 10x10cm2. The main topic is the optimization of the perovskite and the ETL/HTL layers deposited by solution processing. Morphology and thickness of the layers and its interfaces are challenging issues to reach high PV performance. The improvement of photovoltaic parameters on substrate areas equal to 10x10 cm2 is helpful to evaluate the scaling up of this technology. We performed different experiments in order to improve VOC and FF of the PK modules. In particular, the design of an optimized layout for PK modules is one of the more important action done to reach our goal. Firstly, we fabricated modules with non-optimized layout formed on 10 cells with 7mm width. The results show an efficiency of 10.9% on as substrate area of 10x10cm2. It can be seen that the main factors limiting the efficiency are both low FF and low Jsc values, equal to 58.8% and 16.7mA/cm2, respectively. In order to improve these crucial parameters, two kinds of optimization steps were realized regarding the PK layer and the module layout. The light absorption of the PK layer was increased by varying the spin-coating program during the PK deposition. Furthermore, an optimized layout was designed in order to reduce the impact of the ohmic losses due to the FTO substrate. The new layout is formed by 15 series connected cells with a cell width of 4.5mm. An optimized condition for P1-P2-P3 laser ablations was used to pattern the module. The results show an active area (47.2 cm2) efficiency of 15% for a module fabricated with planar architecture on a SnO2 ETL and substrate area of 10x10cm2. Furthermore, a Maximum Power Point Tracking was used to assess the stabilized efficiency of the modules which results to be equal to 12% after 300s.

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