Proceedings of International Conference on Hybrid and Organic Photovoltaics (HOPV16)
Publication date: 28th March 2016
Recently perovskite solar cells (PSC) have attracted a lot of attention due to high achievable efficiencies using abundant hybrid organic-inorganic perovskite absorber materials. The benchmark perovskite absorber material is methylammonium lead iodide (CH3NH3PbI3). One of the main issues of this material is its sensitivity to moisture. One approach to more stable materials is the incorporation of larger organic cations into the perovskite structure.
Since, besides CH3NH3PbX3, formamidinium lead trihalides were found to be efficient light absorbing materials in PSCs, we explore lead halides containing larger derivatives of the formamidinium cation (e.g. guanidinium, imidazolium) with the aim to achieve absorber materials for PSCs with increased moisture stability. The materials were investigated with respect to their structural and optical properties by PXRD, microscopy, DSC and DRS. We studied the impact of the alternative cations on the moisture stability of the materials. In order to evaluate the suitability as absorber materials in solar cells, films were grown and their optical absorption behavior and morphology were investigated by SEM and AFM.
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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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