Proceedings of International Conference on Hybrid and Organic Photovoltaics (HOPV18)
DOI: https://doi.org/10.29363/nanoge.hopv.2018.192
Publication date: 21st February 2018
Perovskite solar cells demonstrate an enormous potential for next generation photovoltaics because of their ease and low cost of fabrication in combination with their excellent light-harvesting properties. These devices usually consist of ca. 300-500 nm thick layer of an organometallic halide perovskite, sandwiched between two charge-transporting layers. It is well documented that charge generation in these perovskites is fast and efficient while recombination is slow, meaning that the device properties are largely limited by processes at the internal interfaces or within the charge-transporting layers.
Here, we present the results of a detailed study on hybrid perovskite solar cells comprising all-organic charge transport layers. We show the energetics of the organic semiconductor affects the device performance through the rate of interfacial charge recombination, and how these recombination processes are severely reduced through the proper choice of the organic material.[1] We also highlight the role of the charge transport material in determining the speed of charge extraction and with that the fill factor of the device.[2,3] Through proper design of all layers and interfaces, stable 1 cm2 – sized perovskite solar cells with record fill factors (> 81%) and high open circuit voltages (1.17 V), approaching a power conversion efficiency of 20 %, could be realized.[4]
[1] C.M. Wolff, F. Zu, A. Paulke, L.P. Toro, N. Koch, and D. Neher, Adv. Mater. 1700159 (2017).
[2] M. Stolterfoht, C.M. Wolff, Y. Amir, A. Paulke, L. Perdigon-Toro, P. Caprioglio, and D. Neher, Energy Environ. Sci. 10, 1530 (2017).
[3] J.A. Love, M. Feuerstein, C.M. Wolff, A. Facchetti, and D. Neher, ACS Appl. Mater. &Interf. online DOI 10.1021/acsami.7b10361 (2017).
[4] M. Stolterfoht, C.M. Wolff, S. Zhang, J.A.M. Prieto, C.J. Hages, Th. Unold, S. Albrecht, P.L. Burn, P. Meredith, D. Neher, submitted
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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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