Optoelectronic Properties and Applications of Quantum Dots

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Abstract

In semiconductor quantum dots (QDs) are called artificial atoms, sharing some of the optical and optoelectronic properties with atoms. This chapter focuses on the epitaxially grown QDs and presents the applications of colloidal QDs. It briefly discusses some different techniques for the epitaxial growth of semiconductor QDs of high optical quality. The elementary electronic excitation, the exciton, in semiconductor QDs is an electron–hole pair excited across the electronic bandgap within the QD as defined by the bulk energy gap and the quantization energies within the conduction and valence bands, respectively, and modified by the Coulomb interaction between electron and hole. Since quantitative absorption experiments are difficult to carry out on epitaxially grown QDs, the optical and optoelectronic properties of QDs are most conveniently studied in photoluminescence experiments where the QDs are excited via absorption in the barrier material and subsequent relaxation and capture of electrons and holes into their lowest quantized states in the QDs.

Original languageEnglish
Title of host publicationOptical Properties of Materials and Their Applications
EditorsJai Singh
PublisherWiley-Blackwell
Publication date2020
EditionSecond edition
Pages503-536
Chapter17
ISBN (Print)9781119506317
DOIs
Publication statusPublished - 2020

Keywords

  • Bulk energy gap
  • Coulomb interaction
  • Electronic bandgap
  • Elementary electronic excitation
  • Epitaxial growth
  • Optical properties
  • Optoelectronic properties
  • Quantization energies
  • Self‐assembled quantum dots
  • Site‐controlled growth

Cite this

Hvam, J. M. (2020). Optoelectronic Properties and Applications of Quantum Dots. In J. Singh (Ed.), Optical Properties of Materials and Their Applications (Second edition ed., pp. 503-536). Wiley-Blackwell. https://doi.org/10.1002/9781119506003.ch17