A flexible back-contact perovskite solar micro-module

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Abstract

Back-contact perovskite solar cells are fabricated by depositing methylammonium lead iodide perovskite into micron-sized grooves, with opposite walls of each groove being coated with either n- or p-type selective contacts. V-Shaped grooves are created by embossing a polymeric substrate, with the different charge-selective electrodes deposited onto the walls of the groove using a directional evaporation technique. We show that individual grooves act as photovoltaic devices, having a power conversion efficiency of up to 7.3%. By series-connecting multiple grooves, we create integrated micro-modules that build open circuit voltages up to nearly 15 V and power conversion efficiencies over 4%. The devices created are fully flexible, do not include rare metals, and are processed using techniques applicable to roll-to-roll processing.

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Wong-Stringer, M., Routledge, T. J., McArdle, T., Wood, C. J., Game, O. S., Smith, J. A., … Lidzey, D. G. (2019). A flexible back-contact perovskite solar micro-module. Energy and Environmental Science, 12(6), 1928–1937. https://doi.org/10.1039/c8ee03517b

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