Towards 2D Layered Hybrid Perovskites with Enhanced Functionality
Laurence Lutsen a, Dirk Vanderzance a b, Wouter Van Gompel b, Roald Herckens b, Paul-Henri Denis b, Martijn Mertens b, Tom Aernouts c, Jan D'Haen d, Bart Ruttens d, Kristof Van Hecke e
a 1 IMEC, Imomec, Diepenbeek (Belgium)
b Hasselt University, WET/OBPC/HyMat, Diepenbeek (Belgium)
c IMEC, Leuven, Leuven, Belgium
d Hasselt University, IMO, Diepenbeek (Belgium)
e Gent University, Department of Chemistry, Gent (Belgium)
Proceedings of International Conference on Hybrid and Organic Photovoltaics (HOPV19)
Roma, Italy, 2019 May 12th - 15th
Organizers: Prashant Kamat, Filippo De Angelis and Aldo Di Carlo
Oral, Laurence Lutsen, presentation 090
Publication date: 11th February 2019

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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