Elucidation of the role of guanidinium incorporation in single-crystalline MAPbI3 perovskite on ion migration and activation energy

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dc.contributor.authorMahapatra, Apurba
dc.contributor.authorRunjhun, Rashmi
dc.contributor.authorNawrocki, Jan
dc.contributor.authorLewiński, Janusz
dc.contributor.authorKalam, Abul
dc.contributor.authorKumar, Pawan
dc.contributor.authorTrivedi, Suverna
dc.contributor.authorTavakoli, Mohammad Mahdi
dc.contributor.authorProchowicz, Daniel
dc.contributor.authorYadav, Pankaj
dc.contributor.organizationDepartment of Physics & Astronomy, National Institute of Technology, Rourkela, Indiaen
dc.contributor.organizationInstitute of Physical Chemistry, Polish Academy of Sciencesen
dc.contributor.organizationFaculty of Chemistry, Warsaw University of Technology, Polanden
dc.contributor.organizationDepartment of Chemistry, Faculty of Science, King Khalid University, Abha, Saudi Arabiaen
dc.contributor.organizationDepartment of Chemical Engineering, National Institute of Technology, Rourkela, Indiaen
dc.contributor.organizationDepartment of Electrical Engineering and Computer Science, Massachusetts Institute of Technology, Cambridge, United Statesen
dc.contributor.organizationDepartment of Solar Energy, School of Technology, Pandit Deendayal Petroleum University, Gandhinagar, Gujarat, Indiaen
dc.date.accessioned2022-03-15T13:55:25Z
dc.date.available2022-03-15T13:55:25Z
dc.date.issued2020
dc.description.abstractIon migration plays a significant role in the overall stability and power conversion efficiency of perovskite solar cells (PSCs). This process was found to be influenced by the compositional engineering of the A-site cation in the perovskite crystal structure. However, the effect of partial A-site cation substitution in a methylammonium lead iodide (MAPbI3) perovskite on the ion migration process and its activation energy is not fully understood. Here we study the effect of a guanidinium (GUA) cation on the ion transport dynamics in the single crystalline GUAxMA1−xPbI3 perovskite composition using temperature-dependent electrochemical impedance spectroscopy (EIS). We find that the small substitution of MA with GUA decreases the activation energy for iodide ion migration in comparison to pristine MAPbI3. The presence of a large GUA cation in the 3D perovskite structure induces lattice enlargement, which perturbs the atomic interactions within the perovskite lattice. Consequently, the GUAxMA1−xPbI3 crystal exhibits a higher degree of hysteresis during current–voltage (J–V) measurements than the single-crystalline MAPbI3 counterpart. Our results provide the fundamental understanding of hysteresis, which is commonly observed in GUA-based PSCs and a general protocol for in-depth electrical characterization of perovskite single crystals.en
dc.identifier.citationPhys. Chem. Chem. Phys., 2020,22, 11467-11473. https://doi.org/10.1039/D0CP01119Cen
dc.identifier.doi10.1039/D0CP01119C
dc.identifier.urihttps://open.icm.edu.pl/handle/123456789/21150
dc.language.isoen
dc.publisherRoyal Society of Chemistryen
dc.rightsUznanie autorstwa 4.0 Międzynarodowe*
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/legalcode
dc.subjectperovskite solar cellsen
dc.subjectperovskite single crystalsen
dc.subjecthysteresisen
dc.subjection migrationen
dc.titleElucidation of the role of guanidinium incorporation in single-crystalline MAPbI3 perovskite on ion migration and activation energyen
dc.typearticleen
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