Proceedings of International Conference on Hybrid and Organic Photovoltaics (HOPV19)
DOI: https://doi.org/10.29363/nanoge.hopv.2020.090
Publication date: 6th February 2020
Recently organic-inorganic perovskite hybrid materials have been developed for solar cell applications reaching record efficiencies of more than 23%. Furthermore, these materials allow to move from a fundamentally 3D structure using small organic molecules to essentially 2D layered structures using larger organic molecules. This opens an avenue towards a quite new class of organic-inorganic nanocomposites in which the inorganic perovskite sheet acts as a template for the self-assembly of organic chromophores confined between the sheets of the inorganic layer. Thus the complexity of the organic interlayer in organic-inorganic hybrid perovskites can be increased by introducing additional secondary interactions between different organic components, e.g. pi-interactions. A fluent transition of electro-optical properties can be achieved of the inorganic part from confined 2D structures to strongly delocalized quasi-3D structures. The use of carbazole ammonium salts in 2D hybrid perovskites leads to materials for solar cells with enhanced photoconductivity and stronger resistance toward moisture yielding solar cells with enhanced stability [1]. Also, the use of pyrene ammonium salts to synthesize 2D hybrid perovskites has been explored and initial results on the structure and optoelectronic properties will be discussed [2]. In combination with the introduction of extra secondary interactions in the organic layer, a material is obtained with an exceptionally low bandgap.
[1] Multi-layered hybrid perovskites templated with carbazole derivatives: optical properties, enhanced moisture stability and solar cell characteristics. Roald Herckens, Wouter T. M. Van Gompel, Wenya Song,bc Maria C. Gelvez-Rueda, Arthur Maufort, Bart Ruttens, Jan D'Haen, Ferdinand C. Grozema, Tom Aernouts, Laurence Lutsen and Dirk Vanderzande. J. Mater. Chem. A, 2018, 6, 22899. DOI: 10.1039/c8ta08019d.
[2] Low-dimensional Hybrid Perovskites Containing an Organic Cation with an Extended Conjugated System: Tuning the Excitonic Absorption Features Wouter T.M. Van Gompel, Roald Herckens, Kristof Van Hecke, Bart Ruttens, Jan D’Haen, Laurence Lutsen and Dirk Vanderzande. ChemNanoMat 2019, 5. Accepted. DOI: 10.1002/cnma.201800561.
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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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