High-energy exciton transitions in quasi-two-dimensional cadmium chalcogenide nanoplatelets

  title={High-energy exciton transitions in quasi-two-dimensional cadmium chalcogenide nanoplatelets},
  author={Roman B. Vasiliev and Alexander I. Lebedev and Elizabeth P. Lazareva and Natalia N. Shlenskaya and Vladimir B. Zaytsev and Alexei Grigorievich Vitukhnovsky and Yuanzhao Yao and Kazuaki Sakoda},
  journal={Physical Review B},
Semiconductor nanoparticles of cadmium chalcogenides are known to exhibit pronounced thickness-dependent $E_0$ series of exciton transitions at the $\Gamma$ point of the Brillouin zone (BZ). In this work, we report an experimental evidence for high-energy series of exciton transitions, which originates from BZ points different from the $\Gamma$ point, in the family of cadmium chalcogenide quasi-2D nanoplatelets (NPLs). Intensive UV absorption bands demonstrating a pronounced size effect are… 

Figures and Tables from this paper

Tuning optoelectronic response of lateral core-alloyed crown nanoplatelets: type-II CdSe–CdSe1−x Te x

The CdSe–CdSe1−x Te x core-alloyed crown NPLs are proposed as a promising contender for the near-infrared-emitting heterostructures preparation used for light-harvesting applications.

Dielectric Screening Modulates Semiconductor Nanoplatelet Excitons.

The influence of external dielectric environments is well understood for 2D semiconductor materials but overlooked for colloidally grown II-VI nanoplatelets (NPLs). In this work, we synthesize MX (M

Negative thermal expansion in CdSe quasi-two-dimensional nanoplatelets

The in-plane coefficient of thermal expansion (CTE) for CdSe nanoplatelets with the zinc-blende structure containing from two to five monolayers is calculated from first principles within the

Atomically-Thin CdSe and CdTe Colloidal Nanosheets: Growth, Crystal Structure, and Optical Properties

The article describes the main features of a new class of colloidal nanoparticles with the electronic structure of semiconductor quantum wells – atomically-thin cadmium selinide CdSe and cadmium

Saturation of Exciton Absorption in CdSe/CdS Nanoplatelets under Transient Excitation Conditions

Nonlinear absorption of light by colloidal CdSe nanoplatelets with a CdS shell is investigated under the conditions of transient single-photon generation of excitons. By changing the shell thickness,

Nanosilicon stabilized with ligands: Effect of high‐energy electron beam on luminescent properties

Silicon nanopowders with nitrogen heterocyclic carbene (NHC) and butyl as stabilizing ligands were synthesized by bottom up chemical methods. Transmission electron microscopy (TEM) was used to obtain

Nonlinear effects in colloidal nanoplatelets with two-dimensional electronic structure

We have investigated the nonlinear absorption of CdSe-based nanoplatelets (NPLs) with different thicknesses of shell in the case of resonant one-photon stationary excitation of exciton transitions by

Photochromic systems with photoinduced emission modulation of colloidal CdSe quantum wells.

  • V. BarachevskyO. V. Venidiktova S. Maskevich
  • Chemistry, Physics
    Photochemical & photobiological sciences : Official journal of the European Photochemistry Association and the European Society for Photobiology
  • 2019
Photochromic systems containing two-dimensional CdSe nanoparticles (colloidal quantum wells) and photochromic compounds of the thermally relaxing chromene and thermally irreversible diarylethene classes in solutions were found to exhibit modulation of emission of two- dimensional nanoparticles in accordance with thephotochromic transformations of compounds due to Förster resonance energy transfer.