Charge carrier dynamics in different crystal phases of CH3NH3PbI3 perovskite

Efthymis Serpetzoglou; Ioannis Konidakis; George Kourmoulakis; Ioanna Demeridou; Konstantinos Chatzimanolis; Christos Zervos; George Kioseoglou; Emmanuel Kymakis; Emmanuel Stratakis

doi:10.29026/oes.2022.210005

Journals >Opto-Electronic Science >Volume 1 >Issue 4 >Page 210005 > Article

Opto-Electronic Science
Vol. 1, Issue 4, 210005 (2022)

Charge carrier dynamics in different crystal phases of CH₃NH₃PbI₃ perovskite

Efthymis Serpetzoglou^1、*, Ioannis Konidakis¹, George Kourmoulakis^1、3, Ioanna Demeridou^1、4, Konstantinos Chatzimanolis², Christos Zervos², George Kioseoglou^1、3, Emmanuel Kymakis², and Emmanuel Stratakis^{1、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

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μPL spectra following excitation at 543 nm of the (a) Glass/CH3NH3PbI3, (b) Glass/ITO/PEDOT:PSS/CH3NH3PbI3 and (c) Glass/ITO/PTAA/CH3NH3PbI3 architectures.

Fig. 1. μPL spectra following excitation at 543 nm of the (a) Glass/CH₃NH₃PbI₃, (b) Glass/ITO/PEDOT:PSS/CH₃NH₃PbI₃ and (c) Glass/ITO/PTAA/CH₃NH₃PbI₃ architectures.

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Shift of the μPL emission peak as a function of temperature for (a) Glass/CH3NH3PbI3,(b) Glass/ITO/PEDOT:PSS/CH3NH3PbI3 and (c) Glass/ITO/PTAA/CH3NH3PbI3 architectures for the orthorhombic (red solid circles) and tetragonal (blue solid circles) perovskite crystal phases.

Fig. 2. Shift of the μPL emission peak as a function of temperature for (a) Glass/CH₃NH₃PbI_3,(b) Glass/ITO/PEDOT:PSS/CH₃NH₃PbI₃ and (c) Glass/ITO/PTAA/CH₃NH₃PbI₃ architectures for the orthorhombic (red solid circles) and tetragonal (blue solid circles) perovskite crystal phases.

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Fig. 3. FWHM of the PL peaks corresponding to the orthorhombic (black diamonds) and tetragonal (red circles) phases of CH₃NH₃PbI₃ as a function of temperature (a) Glass/CH₃NH₃PbI₃, (b) Glass/ITO/PEDOT:PSS/CH₃NH₃PbI₃ and (c) Glass/ITO/PTAA/CH₃NH₃PbI₃. Green solid lines show the fitting acquired by the temperature-independent inhomogeneous broadening (Γ₀) and the interaction between charge carriers and longitudinal optical phonons (LO-phonons), as described by the Fröhlich Hamiltonian.

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Fig. 4. Optical density (ΔOD) vs. wavelength at various delay times for Glass/ITO/PEDOT:PSS/CH₃NH₃PbI₃ architecture at (a) 85 K, (b) 120 K and (c) 180 K.

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Fig. 5. Optical density ΔOD vs. wavelength at various delay times for Glass/ITO/PTAA/CH₃NH₃PbI₃ configuration at (a) 85 K, (b) 120 K and (c) 180 K.

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Fig. 6. Optical density (ΔOD) peaks wavelength as a function of temperature for Glass/ITO/PEDOT:PSS/CH₃NH₃PbI₃ architecture and Glass/ITO/PTAA/CH₃NH₃PbI₃configurations, as extracted from TAS spectra at t = 0 ps (see Fig. 4 and Fig. 5 blue lines).

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Fig. 7. Normalized optical density (ΔOD) vs. delay time for Glass/ITO/PEDOT:PSS/CH₃NH₃PbI₃and Glass/ITO/PTAA/CH₃NH₃PbI₃configurations for the orthorhombic phase at (a) 85 K, (b) 120 K and for the tetragonal phase at (c) 120 K and (d) 180 K. Symbols present the transient band edge bleach kinetics, while solid lined present the decay exponential fitting. Insets are shown the initial time scale for Glass/ITO/PTAA/CH₃NH₃PbI₃.

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Temperature (K)	PEDOT: PSS					PTAA
Temperature (K)	λ_max (nm)	$τ_{1}$ ± 2 (ps)	$τ_{2}$ ± 8 (ps)	$τ_{3}$ ± 13 (ps)	k₂±0.2×10^–10 (cm³s^–1)	λ_max (nm)	$τ_{1}$ ± 2 (ps)	$τ_{2}$ ± 8 (ps)	$τ_{3}$ ± 13 (ps)	k₂±0.2×10^–10 (cm³s^–1)
85	737	6.1	562	562	9.9×10^–10	727	6.2	296	296	9.1×10^–10
120	730	12	171	962	9.9×10^–10	724	5.7	64	324	3.8×10^–10
120	766	16.7	449	995	1.3×10^–9	760	7.3	137	362	6.6×10^–10
180	752	14.7	266	933	1.2×10^–10	766	5.7	57	1839	1.0×10^–10