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Doping silicon nanocrystals and quantum dots.

Brittany L Oliva-Chatelain1, Thomas M Ticich2, Andrew R Barron3

  • 1Department of Chemistry, Rice University, Houston, TX 77005, USA.

Nanoscale
|January 5, 2016
PubMed
Summary

Doping silicon quantum dots (QDs) and nanocrystals (NCs) is challenging due to dopant location (crystal, surface, or matrix). This review covers synthesis and characterization methods for effective doping in optoelectronic applications.

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Area of Science:

  • Materials Science
  • Nanotechnology
  • Semiconductor Physics

Background:

  • Incorporating dopants into silicon nanocrystals (NCs) and quantum dots (QDs) is crucial for optoelectronic applications.
  • Dopant location (crystal, surface, or matrix) significantly impacts material properties, unlike in bulk semiconductors.
  • Controlling dopant placement is a key challenge hindering the widespread use of silicon NCs and QDs.

Purpose of the Study:

  • To review synthetic strategies for doping silicon NCs and QDs.
  • To evaluate the efficacy of in situ and post-synthesis methods for controlling dopant location and level.
  • To guide researchers in selecting appropriate characterization techniques for doped silicon nanomaterials.

Main Methods:

  • Comprehensive review of existing literature on doping silicon NCs and QDs.
  • Analysis of various synthetic approaches, including in situ and post-synthesis methods.
  • Summary of characterization techniques used to determine dopant concentration, location, and electronic/photonic effects.

Main Results:

  • Various synthetic strategies exist for doping silicon NCs and QDs, with differing efficiencies in controlling dopant location and level.
  • Characterization methods provide crucial information on dopant distribution and its impact on material properties.
  • Specific techniques are highlighted for accurately assessing dopant concentration, location, and functional effectiveness.

Conclusions:

  • Effective doping of silicon NCs and QDs requires careful selection of synthesis and characterization methods.
  • Understanding dopant location (c-doping, s-doping, m-doping) is essential for optimizing optoelectronic performance.
  • This review serves as a guide for researchers developing doped silicon nanomaterials for advanced applications.