From Event: SPIE Optics + Photonics for Sustainable Energy, 2016
CH3NH3PbI3 perovskite solar cells are one of the most exciting technologies in the renewable energy field, resulting in over 20% power conversion efficiency. Deep understanding of the working principle is now required to turn the high efficiency solar cells into a reliable technology. In this work we have explored the role of deposition method on the crystallinity of perovskite films and its influence on the hysteresis behavior of the current-voltage characteristics. In addition Nb2O5 was used as hole blocking layer and its influence is also discussed. We have found that hysteresis is strongly dependent on both; perovskite deposition method and Nb2O5 thickness. The ideal condition where the hysteresis is suppressed or minimized was achieved by using the sequential deposition method for the perovskite semiconductor and a hole blocking layer of 50 nm.
Silvia Leticia Fernandes, Bruna Andressa Bregadiolli, Anna Christina Véron, Frank A. Nüesch, Maria Aparecida Zaghete, and Carlos Frederico de Oliveira Graeff, "Hysteresis dependence on CH3NH3PbI3 deposition method in perovskite solar cells," Proc. SPIE 9936, Thin Films for Solar and Energy Technology VIII, 99360B (Presented at SPIE Optics + Photonics for Sustainable Energy: August 29, 2016; Published: 23 September 2016); https://doi.org/10.1117/12.2236855.
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