Proceedings of International Conference Asia-Pacific Hybrid and Organic Photovoltaics 2018 (AP-HOPV18)
DOI: https://doi.org/10.29363/nanoge.ap-hopv.2018.065
Publication date: 27th October 2017
Lead/Tin(Sn/Pb) mixed perovskite solar cells give advantages such as reduced amount of lead content and improved photon harvesting towards higher wavelength [1]. Inspite of these benefits, Sn/Pb possess low air stability due to rapid oxidation of Sn2+ to Sn4+, which results in immediate degradation of solar cell performance and makes even difficult to correctly evaluate the performance. To solve the issue we tried to explore the role of multiple monovalent cations such as rubidium (Rb+)cesium(Cs+), formamidinium [(CH3(NH2)2+, FA+], methylammonium [(CH3NH3)+, MA+] etc. on the A position of ABX3 perovskite crystal structure[2], which has been reported as an approach to improve the stability and reproducibility of Pb based perovskite solar cells. The present research work discusses about the difference in performance of double and triple cation based perovskites answered by X-ray diffraction (XRD) pattern, thermogravimetric analysis (TGA), scanning electron microscopy etc. Solar cells fabricated were (FASnI3)0.6(MAPbI3)0.4 as (FAMA), (CsI)x[(FASnI3)0.6(MAPbI3)0.4]1-x as (Cs)x(FAMA)1-x. The optimized solar cell performance of ~16% will be reported with the further discussion on effect of addition of more monovalent cations at A position of ASn/PbX3 perovskite solar cell.
Reference
1. Y. Ogomi & S. Hayase et al, J. Phys. Chem. Lett., 2014, 5, 1004-1011.
2. M. Saliba & M. Gratzel et al, Energy & Environ. Sci., 2016, 9, 1989-1997.
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