Proceedings of International Conference on Hybrid and Organic Photovoltaics (HOPV18)
Publication date: 21st February 2018
Hybrid perovskites have been considered as a promising photovoltaic material, and recent progress on interface and material synthesis allows excellent performances and stability. [1].
Perovskite solar cells are commonly fabricated in nitrogen atmosphere or in air with low moisture due to its strong impact on the initial growth of perovskite crystals and consequently on the device performance. In our case, perovskite solar cells are constructed with the inverted structure. The conductive substrate is indium tin oxide (ITO), and a thin layer of PEDOT: PSS is spin-coated as the hole transport layer (HTL) before perovskite deposition. The electron transport layer (ETL) is obtained by PCBM deposition. The final top electrode is grown by Aluminum evaporation. The final inverted structure is formed by all these layers: ITO/ PEDOT: PSS / CH3NH3PbI3-xClx / PCBM/ Al. Here, we present a method for the development of perovskite based solar cells under moisture conditions. In particular, we demonstrated that by using an annealing step during the spin coating of the perovskite precursor solution we reduce the effect of the air conditions leading to 5.8% efficiency. Same structure have been developed in nitrogen glove box and show an efficiency around 9.5 %. The influence of the thickness and annealing temperature on the perovskite morphology was analyzed by scanning electron microscopy and atomic force microscopy. In this study we report that the efficiencies of perovskite solar cells are strongly dependent on the film thickness and annealing temperature.
[1] G. Grancini, C. Roldán-Carmona, I. Zimmermann, E. Mosconi, X. Lee, D. Martineau, S. Narbey, F. Oswald, F. De Angelis, M. Graetzel & Mohammad Khaja Nazeeruddin, Nature Communications volume 8, Article number: 15684 (2017) doi:10.1038/ncomms15684
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International Conference on Hybrid and Organic Photovoltaics
International Conference on Hybrid and Organic Photovoltaics (HOPV) is celebrated yearly in May. The main topics are the development, function and modeling of materials and devices for hybrid and organic solar cells. The field is now dominated by perovskite solar cells but also other hybrid technologies, as organic solar cells, quantum dot solar cells, and dye-sensitized solar cells and their integration into devices for photoelectrochemical solar fuel production.
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