Proceedings of International Conference Asia-Pacific Hybrid and Organic Photovoltaics 2018 (AP-HOPV18)
Publication date: 27th October 2017
Organic-metal halide perovskites, such as methylammonium lead iodide (MAPbI3) and formamidinium lead iodide (FAPbI3), have attracted the attention of many research groups due to its promising optoelectronic characteristics, including appropriate and tunable band gap, high light-absorption coefficient in visible light range, and long carrier transport length, rendering it be widely used in solar cells. In past 10 years, the efficiency of perovskite solar cells has progressed rapidly from 3.8% to 22.7%. In the fabrication of perovskite layer, the commonly used perovskite precursor is lead iodide (PbI2) mainly dissolved in DMF or DMSO. The PbI2 precursor solution is coated on TiO2 layer, and then dipped into methylammonium iodide/isopropanol solution to form perovskite. Although the method mentioned above is easy to operate, the toxicity of DMF and DMSO in this process inhibit the perovskite solar cells in industrial application. Aim to minimize the toxicity during the process, we study to use lead nitrate (Pb(NO3)2) aqueous solution as the source of lead, and prepare perovskite layer by vapor-assisted solution process (VASP) instead of dipping process. The properties and surface morphology of perovskite film were measured by UV-Vis spectrometer, X-ray diffraction (XRD) and field-emission scanning electron microscopy (FESEM). The results showed that Pb(NO3)2 can successfully be converted to large grain-sized perovskite with complete coverage and good optical absorption. Preliminary test on the solar cell performance using this MAPbI3 is also reported.
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International Conference on Hybrid and Organic Photovoltaics
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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