Proceedings of International Conference on Perovskite and Organic Photovoltaics and Optoelectronics (IPEROP19)
DOI: https://doi.org/10.29363/nanoge.iperop.2019.017
Publication date: 23rd October 2018
Recently, perovskite solar cells have received much attention due to their rapid progress in efficiency with certified efficiency of 23.3%. On the other hand, one of the biggest concerns for commercialization remains stability. Especially, compatibility of high efficiency and thermal stability is one of the biggest challenges since stability at high temperature frequently suffers significant reductions in efficiency due to limited choice of the materials or device structure. Here, we achieved 92% retention at 85 ̊C /85% RH stress test, which is specified in international standard (IEC 61215), with exceeding 20% power conversion efficiency (certified efficiency of 20.8% at 1 cm2) by engineering perovskite compositions. Furthermore, we demonstrated the world highest level of 12.6% power conversion efficiency at 20cm×20cm size module (aperture area of 354.45cm2, 35 cells in series). The latest result of module development will be reported in the conference. These results show great feasibility for practical use of perovskite solar cells.
The authors acknowledge Ecole polytechnique fédérale de Lausanne (EPFL) and New Energy and Industrial Technology Development Organization (NEDO,Japan) for thier support.
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