Publication detail

In-situ thermal fabrication of photodetectors based on methylammonium lead bromide perovskite

GAVRANOVIĆ, S. BLAHUT, J. ZMEŠKAL, O. POSPÍŠIL, J. HARNA, V.

Original Title

In-situ thermal fabrication of photodetectors based on methylammonium lead bromide perovskite

Type

journal article in Scopus

Language

English

Original Abstract

This paper presents low cost fabrication method of MAPbBr3 crystalline structures directly on the polylactic acid (PLA) carbon-coated substrates. Fabrication was carried out using three different crystallization processes: inverse temperature crystallization (ITC), anti-solvent vapor-assisted crystallization (AVC) and combination of both methods. This paper also includes the study of crystallization kinetics for both the perovskite and its precursors. Moreover, temperature modulated space-charge-limited current method (TM-SCLC) was applied to the measured current-voltage characteristics to estimate the concentration of free and trapped charge carriers, the microscopic mobility of free charge carriers, the thermodynamic position of the Fermi level as well as the position of localized states and their concentration. Based on the acquired data we determined following microscopic carrier mobilities and thermodynamic Fermi level positions: μ+/μ− ≈ 0.2/4.0 cm2/V/s, ΔEF ≈ –0.48 eV for PbBr2, μ+/μ− ≈ 10/10 cm2/V/s, ΔEF ≈ –0.575 eV for MABr, and μ+/μ− ≈ 10/300 cm2/V/s, ΔEF ≈ –0.57 eV for MAPbBr3). By comparing our model with literature data (bandgap width, permittivity, effective mass of carriers, etc.) we found and characterized the monoenergetic (bi-exponential) localized states near Fermi level of the studied materials (deep traps for PbBr2, shallow traps for MAPbBr3, and states at the Fermi level for MABr).

Keywords

Electronic transport; Localized states; Current-voltage characteristic; Photodetectors; Crystal structure; Polymers; Perovskites

Authors

GAVRANOVIĆ, S.; BLAHUT, J.; ZMEŠKAL, O.; POSPÍŠIL, J.; HARNA, V.

Released

12. 9. 2023

Publisher

AIP Publishing

ISBN

1551-7616

Periodical

AIP Conference Proceedings

Year of study

2894

Number

2023

State

United States of America

Pages from

1

Pages to

9

Pages count

9

URL

https://doi.org/10.1063/5.0163726

BibTex

@article{BUT187645,
  author="Stevan {Gavranović} and Jan {Blahut} and Oldřich {Zmeškal} and Jan {Pospíšil} and Václav {Harna}",
  title="In-situ thermal fabrication of photodetectors based on methylammonium lead bromide perovskite",
  journal="AIP Conference Proceedings",
  year="2023",
  volume="2894",
  number="2023",
  pages="9",
  doi="10.1063/5.0163726",
  issn="1551-7616",
  url="https://doi.org/10.1063/5.0163726"
}