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dc.contributor.authorKumar, Abhisheken
dc.contributor.authorPriyadarshi, Anishen
dc.contributor.authorShukla, Sudhanshuen
dc.contributor.authorManjappa, Manukumaraen
dc.contributor.authorHaur, Lew Jiaen
dc.contributor.authorMhaisalkar, Subodh Gautamen
dc.contributor.authorSingh, Ranjanen
dc.identifier.citationKumar, A., Priyadarshi, A., Shukla, S., Manjappa, M., Haur, L. J., Mhaisalkar, S. G., & Singh, R. (2018). Ultrafast THz photophysics of solvent engineered triple-cation halide perovskites. Journal of Applied Physics, 124(21), 215106-. doi:10.1063/1.5051561en
dc.description.abstractSolution processed thin film organic-inorganic perovskites are key to the large scale manufacturing of next generation wafer scale solar cell devices. The high efficiency of the hybrid perovskite solar cells is derived mainly from the large carrier mobility and the charge dynamics of films, which heavily depend on the type of solvent used for the material preparation. Here, we investigate the nature of conduction and charge carrier dynamics of mixed organic-inorganic cations [methylammonium (MA), formamidinium (FA), and cesium (Cs)] along with the mixed halides [iodine (I) and bromine (Br)] perovskite material [Cs0.05(MA0.17FA0.83)0.95Pb(I0.83Br0.17)3] synthesized in different solvents using optical pump terahertz probe (OPTP) spectroscopy. Our findings reveal that carrier mobilities and diffusion lengths strongly depend on the type of solvent used for the preparation of the mixed cation perovskite film. The mixed cation perovskite film prepared using dimethylformamide/dimethylsulfoxide solvent shows greater mobility and diffusion length compared to γ-butyrolactone solvent. Our findings provide valuable insights to improve the charge carrier transport in mixed cation perovskites through solvent engineering.en
dc.description.sponsorshipMOE (Min. of Education, S’pore)en
dc.format.extent4 p.en
dc.relation.ispartofseriesJournal of Applied Physicsen
dc.rights© 2018 American Institute of Physics. All rights reserved. This paper was published in Journal of Applied Physics and is made available with permission of American Institute of Physics.en
dc.subjectThin Filmsen
dc.titleUltrafast THz photophysics of solvent engineered triple-cation halide perovskitesen
dc.typeJournal Articleen
dc.contributor.schoolSchool of Materials Science and Engineeringen
dc.contributor.schoolSchool of Physical and Mathematical Sciencesen
dc.contributor.researchEnergy Research Institute @ NTU (ERI@N)en
dc.description.versionPublished versionen
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