Perovskite solar cells are promising in terms of cost-effective solar energy. Thermal stability has always posed a problem, because it significantly limits the long-term efficiency of a solar cell. Scientists have successfully developed a Perovskite solar call containing Cesium which has attained an efficiency of 21.1%, as well as a world record for reproducibility.
In adding Cesium, the scientists at EPFL, let by Michael Saliba, have developed the first Perovskite compound with triple cations (Cs/MA/FA). These new films are more stable in hot conditions and less affected by fluctuations in environmental variables. They have confirmed efficiencies of 21.1%, and exit efficiency of 18% in operational conditions, even beyond 250 h. These properties are essential for commercial production where reproducibility and stability are prime requirements for a large scale cost-effective production of Perovskite solar cells. This study was the result of a collaboration between the laboratories of EPFL and Panasonic Corporation.
Publication : Saliba M, Matsui T, Seo J-Y, Domanski K, Correa-Baena J-P, Nazeeruddin MK, Zakeeruddin SM, Tress W, Abate A, Hagfeldt A, Grätzel M. Cesium-containing Triple Cation Perovskite Solar Cells: Improved Stability, Reproducibility and High Efficiency. Energy and Environmental Science 16-03-2016. [Source : EPFL|Mediacom]
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21.1 % efficiency with Perovskite solar cells
March 18, 2016 | 15:00
Scientists at EFPL have achieved a reproducibility never before attained for Perovskite solar cells, combined with an efficiency of 21.1% under normal usage conditions.