Excitation wavelength dependent interfacial charge transfer dynamics in a CH3NH3PbI3 perovskite film

Liu, Maning; Endo, Masaru; Shimazaki, Ai; Wakamiya, Atsushi; Tachibana, Yasuhiro

Excitation wavelength dependent interfacial charge transfer dynamics in a CH₃NH₃PbI₃ perovskite film

Mark

Liu, Maning ^LU

; Endo, Masaru ; Shimazaki, Ai ; Wakamiya, Atsushi and Tachibana, Yasuhiro (2018) In Journal of Photopolymer Science and Technology 31(5). p.633-642

Abstract: Elucidation of interfacial charge separation and recombination mechanisms is crucial to improve performance of organic-inorganic metal halide perovskite solar cells. Here, we have investigated influence of initially populated electron and hole potential levels in a perovskite conduction band (CB) and valence band (VB), respectively, by altering an excitation wavelength on interfacial charge separation and recombination dynamics in a CH₃NH₃PbI₃ perovskite film sandwiched by a mesoporous TiO₂ structure as an electron transport material (ETM) and a spiro-OMeTAD film as a hole transport material (HTM). Multi-phasic electron injection reactions are observed over <1.2 to several tens of... (More); Elucidation of interfacial charge separation and recombination mechanisms is crucial to improve performance of organic-inorganic metal halide perovskite solar cells. Here, we have investigated influence of initially populated electron and hole potential levels in a perovskite conduction band (CB) and valence band (VB), respectively, by altering an excitation wavelength on interfacial charge separation and recombination dynamics in a CH₃NH₃PbI₃ perovskite film sandwiched by a mesoporous TiO₂ structure as an electron transport material (ETM) and a spiro-OMeTAD film as a hole transport material (HTM). Multi-phasic electron injection reactions are observed over <1.2 to several tens of nanoseconds, while most of holes are injected to a spiro-OMeTAD layer within the transient emission spectroscopy instrument response time (1.2 ns). In contrast, interfacial charge recombination rates are slower (from 5 ms to 1.3 s) with the increase of the excitation wavelength. These kinetics suggest that as long as low excitation intensity is employed, e.g. 10 nJ/cm² or 1 sun (100 mW/cm²), the APCE of ~100% can be expected at any excitation wavelength for the solar cells based on FTO/c-TiO₂/m-TiO₂/MAPbI₃/OMeTAD films.
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Please use this url to cite or link to this publication: https://lup.lub.lu.se/record/97915f78-7c73-41df-8063-8981f13d2367

author

Liu, Maning ^LU

; Endo, Masaru ; Shimazaki, Ai ; Wakamiya, Atsushi and Tachibana, Yasuhiro

publishing date

2018

type

Contribution to journal

publication status

published

subject

Physical Chemistry

keywords

CHNHPbI perovskite film, Electron injection, Excitation wavelength dependence, Hole injection, Interfacial charge recombination

in

Journal of Photopolymer Science and Technology

volume

31

issue

5

pages

10 pages

publisher

Tokai University

external identifiers

scopus:85053283083

ISSN

0914-9244

DOI

10.2494/photopolymer.31.633

language

English

LU publication?

no

id

97915f78-7c73-41df-8063-8981f13d2367

date added to LUP

2023-08-24 12:38:50

date last changed

2023-08-28 10:48:57

@article{97915f78-7c73-41df-8063-8981f13d2367,
  abstract     = {{<p>Elucidation of interfacial charge separation and recombination mechanisms is crucial to improve performance of organic-inorganic metal halide perovskite solar cells. Here, we have investigated influence of initially populated electron and hole potential levels in a perovskite conduction band (CB) and valence band (VB), respectively, by altering an excitation wavelength on interfacial charge separation and recombination dynamics in a CH<sub>3</sub>NH<sub>3</sub>PbI<sub>3</sub> perovskite film sandwiched by a mesoporous TiO<sub>2</sub> structure as an electron transport material (ETM) and a spiro-OMeTAD film as a hole transport material (HTM). Multi-phasic electron injection reactions are observed over &lt;1.2 to several tens of nanoseconds, while most of holes are injected to a spiro-OMeTAD layer within the transient emission spectroscopy instrument response time (1.2 ns). In contrast, interfacial charge recombination rates are slower (from 5 ms to 1.3 s) with the increase of the excitation wavelength. These kinetics suggest that as long as low excitation intensity is employed, e.g. 10 nJ/cm<sup>2</sup> or 1 sun (100 mW/cm<sup>2</sup>), the APCE of ~100% can be expected at any excitation wavelength for the solar cells based on FTO/c-TiO<sub>2</sub>/m-TiO<sub>2</sub>/MAPbI<sub>3</sub>/OMeTAD films.</p>}},
  author       = {{Liu, Maning and Endo, Masaru and Shimazaki, Ai and Wakamiya, Atsushi and Tachibana, Yasuhiro}},
  issn         = {{0914-9244}},
  keywords     = {{CHNHPbI perovskite film; Electron injection; Excitation wavelength dependence; Hole injection; Interfacial charge recombination}},
  language     = {{eng}},
  number       = {{5}},
  pages        = {{633--642}},
  publisher    = {{Tokai University}},
  series       = {{Journal of Photopolymer Science and Technology}},
  title        = {{Excitation wavelength dependent interfacial charge transfer dynamics in a CH<sub>3</sub>NH<sub>3</sub>PbI<sub>3</sub> perovskite film}},
  url          = {{http://dx.doi.org/10.2494/photopolymer.31.633}},
  doi          = {{10.2494/photopolymer.31.633}},
  volume       = {{31}},
  year         = {{2018}},
}

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Excitation wavelength dependent interfacial charge transfer dynamics in a CH₃NH₃PbI₃ perovskite film