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Harvesting Solar Energy by Means of Charge-Separating Nanocrystals and Their Solids

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Published on: August 23, 2012

Si-CdSSe core/shell nanowires with continuously tunable light emission.

An Lian Pan¹, Lide Yao, Yong Qin

¹MPI of Microstructure Physics, Weinberg 2, Halle 06120, Germany. pananlian@hotmail.com

|August 30, 2008

Summary

Uniform silicon-cadmium sulfide selenide core/shell nanowires were synthesized for tunable light emission. This method offers potential for multicolor nanoscale light-emitting devices.

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Synthesis, Characterization, and Functionalization of Hybrid Au/CdS and Au/ZnS Core/Shell Nanoparticles

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Published on: March 2, 2016

Area of Science:

Materials Science
Nanotechnology
Semiconductor Physics

Background:

Core/shell nanowires offer unique electronic and optical properties.
Controllable synthesis of heterostructures is crucial for advanced device applications.

Purpose of the Study:

To develop a controllable synthesis route for uniform Si-CdSSe core/shell nanowires.
To investigate the tunable light emission properties of these heterostructures.

Main Methods:

Multisource thermal evaporation.
Gold-catalyzed vapor-liquid-solid (VLS) growth for silicon cores.
Deposition of alloyed CdSSe shells with modulated S/Se ratios.

Main Results:

High-quality, single-crystalline Si-CdSSe core/shell nanowires were successfully synthesized.
Continuous modulation of shell composition and band gap was achieved by varying the S/Se ratio.
Strong, tunable light emission in the visible region was observed.

Conclusions:

The developed multisource thermal evaporation route enables controllable synthesis of Si-CdSSe core/shell nanowires.
These heterostructures exhibit tunable light emission, showing potential for multicolor nanoscaled light-emitting devices.
The synthesis approach is adaptable for other Si wire-containing heterostructures.