Introduction to Special Issue: Colloidal Quantum Dots

Matthew Beard, Xiaogang Peng, Zeger Hens, Emily Weiss

Research output: Contribution to journalArticlepeer-review

5 Scopus Citations

Abstract

The quantum confinement effect has driven the development and exploration of colloidal semiconductor nanocrystals over approximately the past three decades. These semiconductor nanostructures are typically synthesized as stable colloidal dispersions in solution-phase chemical batch reactions at relatively low temperatures. Researchers have developed a wide range of reaction conditions to produce a variety of shapes, compositions, and structures with well-controlled sizes and low polydispersities. The shape can be controlled to produce confinement in one, two, or all three spatial dimensions, the latter defining a “quantum dot.” Combining two or more semiconductors within the various nanostructures produces additional optical and electronic degrees of freedom. These mixed compositional nanostructures have properties not accessible in bulk semiconductor systems. Researchers have fabricated novel nanoheterostructures, such as “dot-in-rods,” quantum wells, core/shell structures, giant-core/shell tetrapods where the core is one material and the arm is another, Janus structures that consist of spherical structures with well-defined internal heterostructures, nano-dumbbells, hollow-core structures, and many other novel and interesting structures. The structural variations are seemingly only limited by the creativity of the various researchers engaged in these endeavors.
Original languageAmerican English
Article numberArticle No. 240401
Number of pages5
JournalThe Journal of Chemical Physics
Volume153
Issue number24
DOIs
StatePublished - 28 Dec 2020

NREL Publication Number

  • NREL/JA-5900-78373

Keywords

  • colloidal quantum dots
  • doping
  • heterostructures
  • materials
  • nanocrystals
  • perovskites
  • photocatalysis
  • quantum dots
  • recombination reactions
  • semiconductors
  • spin-orbit interactions

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