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has been cited by the following article:

• TITLE: Influence of Photon Pump Fluence on Charge Carriers in FAPbI3 and Manganite Perovskites

  AUTHORS: Nam Joong Jeon, Jangwon Seo, Sanghee Nah, Jung-Keun Lee

  KEYWORDS: FAPbI3, Perovskite Manganites, Transient Absorption

  JOURNAL NAME: Advances in Chemical Engineering and Science, Vol.12 No.1, January 21, 2022

  ABSTRACT: FAPbI3 and FA(Mn:Pb)I3 perovskite films were prepared and evaluated through steady and transient absorption spectroscopy. According to the analysis using Elliot’s model, there were no considerable differences except for the absorption intensity between FAPbI3 and FA(Mn:Pb)I3 perovskite films: the value of the optical gap (Eg) and the position of exciton resonance (E0) were the same. The femtosecond transient absorption showed biexponential relaxation properties of the charge carriers, suggesting that biexcitons are more easily generated in FA(Mn:Pb)I3 than FAPbI3 perovskite. The generation of biexcitons in FA(Mn:Pb)I3 was also confirmed by the photon pump fluence dependence. Moreover, we were able to estimate the average number of absorbed photons directly from the photon pump power dependence without needing any further experimental measurements such as photoluminescence. Our findings may offer a new way of understanding photoinduced carrier dynamics in perovskite manganites.