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Updated: May 15, 2026
11:13
Analysis of Contact Interfaces for Single GaN Nanowire Devices
Published on: November 15, 2013
Recombination dynamics in InGaN/GaN nanowire heterostructures on Si(111).
V Cardin1, L I Dion-Bertrand, P Grégoire
1Département de Physique and Regroupement Québécois sur Matériaux de Pointe, Université de Montréal, Case Postale 6128, Succursale Centre-ville, Montréal, QC, H3C 3J7, Canada.
Nanotechnology
|January 10, 2013
Summary
Room-temperature photoluminescence reveals complex carrier dynamics in Indium Gallium Nitride (InGaN) embedded in Gallium Nitride (GaN) nanowires. Emission originates from In-rich nanoclusters, showcasing power-law decay linked to charge-separated states.
Area of Science:
- Semiconductor physics
- Materials science
- Nanotechnology
Background:
- Gallium Nitride (GaN) and Indium Gallium Nitride (InGaN) are crucial for optoelectronic devices.
- Understanding carrier dynamics in nanowire heterostructures is key for device efficiency.
Purpose of the Study:
- Investigate carrier recombination dynamics in InGaN-embedded GaN nanowires.
- Elucidate the role of In-rich nanoclusters in light emission.
- Analyze the relationship between emission energy and recombination behavior.
Main Methods:
- Room-temperature time-resolved photoluminescence (TRPL) spectroscopy.
- Analysis of photoluminescence decay curves.
- Modeling carrier dynamics involving radiative and metastable states.
Main Results:
- Observed non-exponential recombination dynamics in InGaN/GaN nanowires.
- Decay curves exhibited power-law behavior at longer timescales.
- Power-law exponent correlated with emission photon energy.
- Model of radiative and metastable states successfully explained the data.
Conclusions:
- Emission is dominated by carriers localized in In-rich nanoclusters within InGaN insertions.
- Spontaneous formation of these nanoclusters influences recombination pathways.
- The findings provide insight into light emission mechanisms in InGaN-based nanostructures.
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