Synthesis and characterization of Ruddlesden-Popper Perovskites for photovoltaic applications
Susana Ramos Terrón a, Gustavo de Miguel Rojas a, Luis Camacho Delgado a
a Departamento de Química Física y Termodinámica Aplicada, Universidad de Córdoba, Campus de Rabanales. Edificio Marie Curie, Córdoba, Spain
International Conference on Hybrid and Organic Photovoltaics
Proceedings of 13th Conference on Hybrid and Organic Photovoltaics (HOPV21)
Online, Spain, 2021 May 24th - 28th
Organizers: Marina Freitag, Feng Gao and Sam Stranks
Poster, Susana Ramos Terrón, 136
Publication date: 11th May 2021
ePoster: 

The partial incorporation of large organic cations into the octahedral sites of 3D perovskites has been widely investigated but few works have reported their addition in 2D Ruddlesden–Popper (RP) perovskites. Here, the gradual substitution of the methylammonium (MA) cation in thin films of 2D RP perovskites (BA)2(MA)2Pb3I10 (BA = n-butylammonium) by guanidinium (Gua), dimethylammonium (DA), ethylammonium (EA), rubidium (Rb), propylammonium (PA), cesium (Cs) or formamidinium (FA) to synthesize mixed A-cation (BA)2(MA1-xAx)2Pb3I10 perovskites has been studied. The limit in the percentage of the A-site cation at which it is homogeneously incorporated in all n phases without destabilizing the overall structure is determined. It is found that the structural changes in the 2D RP perovskites may lead to modifications of the optoelectronic properties as larger bandgap (EA), blue-shift of the PL peak position (above the threshold), strong quenching of the PL (Cs) or reduced concentration of trap states (Gua and EA). Solar devices fabricated with the different mixed A-cation 2D RP display an enhanced performance for those perovskites containing low percentages of Gua or EA cations. This characterization is very valuable to correlate the size and shape of the A-cation with the changes of the properties of the material.

This work was financially supported by the Ministerio de Economía y Competitividad (MINECO) through project CTQ2017-84221-R.

© FUNDACIO DE LA COMUNITAT VALENCIANA SCITO
We use our own and third party cookies for analysing and measuring usage of our website to improve our services. If you continue browsing, we consider accepting its use. You can check our Cookies Policy in which you will also find how to configure your web browser for the use of cookies. More info