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Related Experiment Video

Updated: Jun 17, 2026

Monolayer Contact Doping of Silicon Surfaces and Nanowires Using Organophosphorus Compounds

Monolayer Contact Doping of Silicon Surfaces and Nanowires Using Organophosphorus Compounds

Published on: December 2, 2013

Cluster-doping in silicon nanocrystals.

Atta Ul Haq¹, Marius Buerkle², Bruno Alessi²

¹School of Engineering, Ulster University, York Street, Belfast BT15 1ED, UK.

Nanoscale Horizons

|September 13, 2024

Summary

This summary is machine-generated.

This study introduces tin cluster-doping for silicon nanocrystals, enabling tunable bandgaps without instability. The novel method achieves smaller bandgaps and unique size-dependent behavior, confirmed experimentally.

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Area of Science:

Materials Science
Nanotechnology
Quantum Chemistry

Background:

Tailoring bandgap values in tin-alloyed silicon nanocrystals is challenging due to the high tin concentration required for electronic structure modification, which compromises nanocrystal stability.
Existing methods like isolated atom doping or alloying struggle to achieve desired electronic properties without stability issues.

Purpose of the Study:

To develop a novel approach for doping silicon nanocrystals using tin clusters to achieve tunable bandgaps and enhanced stability.
To investigate the electronic and structural properties of tin cluster-doped silicon nanocrystals through combined theoretical and experimental methods.

Main Methods:

First-principles modeling to predict the electronic structure and bandgap behavior of tin cluster-doped silicon nanocrystals.
Atmospheric pressure microplasma synthesis for experimental fabrication of the silicon-tin nanocrystals.
Characterization of nanocrystal stability and bandgap properties through experimental verification.

Main Results:

Tin cluster-doping significantly reduces the bandgap of silicon nanocrystals even at modest tin concentrations.
An atypical inverse relationship between nanocrystal size and bandgap was observed, contrary to typical quantum confinement effects.
The synthesized silicon-tin nanocrystals demonstrated stability under ambient conditions.

Conclusions:

Tin cluster-doping offers a promising route to engineer the electronic properties of silicon nanocrystals.
The observed atypical size-dependent bandgap behavior opens new avenues for nanoscale material design.
This approach provides stable silicon-tin nanocrystals with tunable bandgaps for potential optoelectronic applications.