Publication detail

Correlative Imaging of Individual CsPbBr3 Nanocrystals: Role of Isolated Grains in Photoluminescence of Perovskite Polycrystalline Thin Films

LIŠKA, P. MUSÁLEK, T. ŠAMOŘIL, T. KRATOCHVÍL, M. MATULA, R. HORÁK, M. NEDVĚD, M. URBAN, J. PLANER, J. ROVENSKÁ, K. DVOŘÁK, P. KOLÍBAL, M. KŘÁPEK, V. KALOUSEK, R. ŠIKOLA, T.

English title

Correlative Imaging of Individual CsPbBr3 Nanocrystals: Role of Isolated Grains in Photoluminescence of Perovskite Polycrystalline Thin Films

Type

journal article in Web of Science

Language

en

Original abstract

We report on the optical properties of a CsPbBr3 polycrystallinethin film on a single grain level. A sample composed of isolated nanocrystals(NCs) mimicking the properties of the polycrystalline thin film grainsthat can be individually probed by photoluminescence spectroscopywas prepared. These NCs were analyzed using correlative microscopyallowing the examination of structural, chemical, and optical propertiesfrom identical sites. Our results show that the stoichiometry of theCsPbBr(3) NCs is uniform and independent of the NCs'morphology. The photoluminescence (PL) peak emission wavelength isslightly dependent on the dimensions of NCs, with a blue shift upto 9 nm for the smallest analyzed NCs. The magnitude of theblueshift is smaller than the emission line width, thus detectableonly by high-resolution PL mapping. By comparing the emission energiesobtained from the experiment and a rigorous effective mass model,we can fully attribute the observed variations to the size-dependentquantum confinement effect.

English abstract

We report on the optical properties of a CsPbBr3 polycrystallinethin film on a single grain level. A sample composed of isolated nanocrystals(NCs) mimicking the properties of the polycrystalline thin film grainsthat can be individually probed by photoluminescence spectroscopywas prepared. These NCs were analyzed using correlative microscopyallowing the examination of structural, chemical, and optical propertiesfrom identical sites. Our results show that the stoichiometry of theCsPbBr(3) NCs is uniform and independent of the NCs'morphology. The photoluminescence (PL) peak emission wavelength isslightly dependent on the dimensions of NCs, with a blue shift upto 9 nm for the smallest analyzed NCs. The magnitude of theblueshift is smaller than the emission line width, thus detectableonly by high-resolution PL mapping. By comparing the emission energiesobtained from the experiment and a rigorous effective mass model,we can fully attribute the observed variations to the size-dependentquantum confinement effect.

Keywords in English

TOTAL-ENERGY CALCULATIONS; QUANTUM CONFINEMENT; HALIDE PEROVSKITES; LUMINESCENT; EMISSION; SPECTRA; SIZE

Released

20.06.2023

Publisher

AMER CHEMICAL SOC

Location

WASHINGTON

ISSN

1932-7447

Volume

127

Number

25

Pages from–to

12404–12413

Pages count

10

BIBTEX


@article{BUT184172,
  author="Petr {Liška} and Tomáš {Musálek} and Tomáš {Šamořil} and Matouš {Kratochvíl} and Radovan {Matula} and Michal {Horák} and Matěj {Nedvěd} and Jakub {Urban} and Jakub {Planer} and Katarína {Rovenská} and Petr {Viewegh} and Miroslav {Kolíbal} and Vlastimil {Křápek} and Radek {Kalousek} and Tomáš {Šikola},
  title="Correlative Imaging of Individual CsPbBr3 Nanocrystals: Role of Isolated Grains in Photoluminescence of Perovskite Polycrystalline Thin Films",
  year="2023",
  volume="127",
  number="25",
  month="June",
  pages="12404--12413",
  publisher="AMER CHEMICAL SOC",
  address="WASHINGTON",
  issn="1932-7447"
}