• Opto-Electronic Science
  • Vol. 1, Issue 4, 210005 (2022)
Efthymis Serpetzoglou1、*, Ioannis Konidakis1, George Kourmoulakis1、3, Ioanna Demeridou1、4, Konstantinos Chatzimanolis2, Christos Zervos2, George Kioseoglou1、3, Emmanuel Kymakis2, and Emmanuel Stratakis1、3、4、*
Author Affiliations
  • 1Institute of Electronic Structure and Laser (IESL), Foundation for Research and Technology-Hellas (FORTH), Herakleio 70013, Greece
  • 2Electrical and Computer Engineering Department, Hellenic Mediterranean University, Herakleio 71004, Greece
  • 3Department of Materials Science and Technology, University of Crete, Herakleio 70013, Greece
  • 4Department of Physics, University of Crete, Herakleio 70013, Greece
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    DOI: 10.29026/oes.2022.210005 Cite this Article
    Efthymis Serpetzoglou, Ioannis Konidakis, George Kourmoulakis, Ioanna Demeridou, Konstantinos Chatzimanolis, Christos Zervos, George Kioseoglou, Emmanuel Kymakis, Emmanuel Stratakis. Charge carrier dynamics in different crystal phases of CH3NH3PbI3 perovskite[J]. Opto-Electronic Science, 2022, 1(4): 210005 Copy Citation Text show less

    Abstract

    Despite that organic-inorganic lead halide perovskites have attracted enormous scientific attention for energy conversion applications over the recent years, the influence of temperature and the type of the employed hole transport layer (HTL) on the charge carrier dynamics and recombination processes in perovskite photovoltaic devices is still largely unexplored. In particular, significant knowledge is missing on how these crucial parameters for radiative and non-radiative recombinations, as well as for efficient charge extraction vary among different perovskite crystalline phases that are induced by temperature variation. Herein, we perform micro photoluminescence (μPL) and ultrafast time resolved transient absorption spectroscopy (TAS) in Glass/Perovskite and two different Glass/ITO/HTL/Perovskite configurations at temperatures below room temperature, in order to probe the charge carrier dynamics of different perovskite crystalline phases, while considering also the effect of the employed HTL polymer. Namely, CH3NH3PbI3 films were deposited on Glass, PEDOT:PSS and PTAA polymers, and the developed Glass/CH3NH3PbI3 and Glass/ITO/HTL/CH3NH3PbI3 architectures were studied from 85 K up to 215 K in order to explore the charge extraction dynamics of the CH3NH3PbI3 orthorhombic and tetragonal crystalline phases. It is observed an unusual blueshift of the bandgap with temperature and the dual emission at temperature below of 100 K and also, that the charge carrier dynamics, as expressed by hole injection times and free carrier recombination rates, are strongly depended on the actual pervoskite crystal phase, as well as, from the selected hole transport material.Despite that organic-inorganic lead halide perovskites have attracted enormous scientific attention for energy conversion applications over the recent years, the influence of temperature and the type of the employed hole transport layer (HTL) on the charge carrier dynamics and recombination processes in perovskite photovoltaic devices is still largely unexplored. In particular, significant knowledge is missing on how these crucial parameters for radiative and non-radiative recombinations, as well as for efficient charge extraction vary among different perovskite crystalline phases that are induced by temperature variation. Herein, we perform micro photoluminescence (μPL) and ultrafast time resolved transient absorption spectroscopy (TAS) in Glass/Perovskite and two different Glass/ITO/HTL/Perovskite configurations at temperatures below room temperature, in order to probe the charge carrier dynamics of different perovskite crystalline phases, while considering also the effect of the employed HTL polymer. Namely, CH3NH3PbI3 films were deposited on Glass, PEDOT:PSS and PTAA polymers, and the developed Glass/CH3NH3PbI3 and Glass/ITO/HTL/CH3NH3PbI3 architectures were studied from 85 K up to 215 K in order to explore the charge extraction dynamics of the CH3NH3PbI3 orthorhombic and tetragonal crystalline phases. It is observed an unusual blueshift of the bandgap with temperature and the dual emission at temperature below of 100 K and also, that the charge carrier dynamics, as expressed by hole injection times and free carrier recombination rates, are strongly depended on the actual pervoskite crystal phase, as well as, from the selected hole transport material.
    Supplementary Materials
    Efthymis Serpetzoglou, Ioannis Konidakis, George Kourmoulakis, Ioanna Demeridou, Konstantinos Chatzimanolis, Christos Zervos, George Kioseoglou, Emmanuel Kymakis, Emmanuel Stratakis. Charge carrier dynamics in different crystal phases of CH3NH3PbI3 perovskite[J]. Opto-Electronic Science, 2022, 1(4): 210005
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