Colloidal Single-Layer Quantum Dots with Lateral Confinement Effects on 2D Exciton

Ho Jin, Minji Ahn, Sohee Jeong, Jae Hyo Han, Dongwon Yoo, Dong Hee Son, Jinwoo Cheon

Research output: Contribution to journalArticle

18 Citations (Scopus)

Abstract

Controlled lateral quantum confinement in single-layer transition-metal chalcogenides (TMCs) can potentially combine the unique properties of two-dimensional (2D) exciton with the size-tunability of exciton energy, creating the single-layer quantum dots (SQDs) of 2D TMC materials. However, exploring such opportunities has been challenging due to the limited ability to produce well-defined SQDs with sufficiently high quality and size control, in conjunction with the commonly observed inconsistency in the optical properties. Here, we report an effective method to synthesize high-quality and size-controlled SQDs of WSe2 via multilayer quantum dots (MQDs) precursors, which enables grasping a clear picture of the role of lateral confinement on the optical properties of the 2D exciton. From the single-particle optical spectra and polarization anisotropy of WSe2 SQDs of varying sizes in addition to their ensemble data, we reveal how the properties of 2D exciton in single-layer TMCs evolve with increasing lateral quantum confinement.

Original languageEnglish
Pages (from-to)13253-13259
Number of pages7
JournalJournal of the American Chemical Society
Volume138
Issue number40
DOIs
Publication statusPublished - 2016 Oct 12

Fingerprint

Quantum Dots
Excitons
Semiconductor quantum dots
Chalcogenides
Transition metals
Quantum confinement
Metals
Optical properties
Anisotropy
Quality Control
Multilayers
LDS 751
Polarization

All Science Journal Classification (ASJC) codes

  • Catalysis
  • Chemistry(all)
  • Biochemistry
  • Colloid and Surface Chemistry

Cite this

Jin, Ho ; Ahn, Minji ; Jeong, Sohee ; Han, Jae Hyo ; Yoo, Dongwon ; Son, Dong Hee ; Cheon, Jinwoo. / Colloidal Single-Layer Quantum Dots with Lateral Confinement Effects on 2D Exciton. In: Journal of the American Chemical Society. 2016 ; Vol. 138, No. 40. pp. 13253-13259.
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Colloidal Single-Layer Quantum Dots with Lateral Confinement Effects on 2D Exciton. / Jin, Ho; Ahn, Minji; Jeong, Sohee; Han, Jae Hyo; Yoo, Dongwon; Son, Dong Hee; Cheon, Jinwoo.

In: Journal of the American Chemical Society, Vol. 138, No. 40, 12.10.2016, p. 13253-13259.

Research output: Contribution to journalArticle

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