Proceedings of International Conference on Hybrid and Organic Photovoltaics (HOPV16)
Publication date: 28th March 2016
To improve the performance and stability of hybrid perovskite solar cells using mixed halide and cation alloys show promise as an alternative to using methylammounium lead iodide (MAPI) in the active layer. Recently, devices using a bottom-cathode architecture with a mesoporous TiO2 layer (FTO/sTiO2/mp-TiO2/perov/Spiro-OMeTAD/Au) were demonstrated to show an energy conversion efficiency of 20.8% and Voc > 1.1 V with no appreciable hysteresis.1 The high Voc was attributed to the role of excess of PbI2 in reducing trap-mediated recombination. We have performed a systematic comparison of these alloyed perovskites with methylammounium lead bromide (MAPBr) and MAPI perovskite solar cells with both bottom-cathode and top-cathode architectures (ITO/PEDOT:PSS/perov/PCBM/Ca/Al) using transient optoelectronic measurements of voltage and current. Our measurements allow us to understand the effects of alloyed lattice components on device performance and the J-V hysteresis.
Reference
1. D. Bi, et al. Efficient luminescent solar cells based on tailored mixed-cation perovskites. Sci. Adv. 2016, 2, e1501170
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International Conference on Hybrid and Organic Photovoltaics (HOPV) is celebrated yearly in May. The main topics are the development, function and modeling of materials and devices for hybrid and organic solar cells. The field is now dominated by perovskite solar cells but also other hybrid technologies, as organic solar cells, quantum dot solar cells, and dye-sensitized solar cells and their integration into devices for photoelectrochemical solar fuel production.
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