The Role of the Built-In Electric Field in Recombination Processes of GaN/AlGaN Quantum Wells: Temperature- and Pressure-Dependent Study of Polar and Non-Polar Structures
Abstract
:1. Introduction
2. Samples and Experimental Techniques
2.1. Sample Growth and Structural Characterization
2.2. Experimental Spectroscopic Techniques
3. Results and Discussion
3.1. Temperature-Dependent Photoluminescence at Ambient Pressure
3.2. Energy Dependence of the PL Decay Times
3.3. Temperature Dependence of PL Decay Times
3.4. Pressure Dependence of the Luminescence Spectra at Low Temperature
4. Conclusions
Author Contributions
Funding
Institutional Review Board Statement
Informed Consent Statement
Data Availability Statement
Acknowledgments
Conflicts of Interest
References
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MQWs Type | Layer | c (Å) | a (Å) | (%) | (%) | (%) | Dislocation Density (109 cm−2) | ||
---|---|---|---|---|---|---|---|---|---|
Non-polar structure | GaN template | 5.1944 | 3.1888 | 0.179 | −0.016 | - | - | 0.11 | |
SL | GaN | 5.1389 | 3.1685 | −0.899 | - | −1.068 | - | 1.76 | |
AlGaN | 0.329 | − | - | ||||||
Polar structure | GaN template | 5.1859 | 3.1866 | 0.0154 | −0.085 | - | - | 1.38 | |
SL | GaN | 5.1363 | 3.1805 | - | −0.277 | - | −0.191 | 1.63 | |
AlGaN | - | 0.299 | - |
MQWs Type | E0 (eV) | α (meV) | Θ (K) |
---|---|---|---|
Non-polar | 3.596 | 52 ± 8 | 326 ± 29 |
Polar | 3.388 | 100 | 326 |
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Koronski, K.; Korona, K.P.; Kryvyi, S.; Wierzbicka, A.; Sobczak, K.; Krukowski, S.; Strak, P.; Monroy, E.; Kaminska, A. The Role of the Built-In Electric Field in Recombination Processes of GaN/AlGaN Quantum Wells: Temperature- and Pressure-Dependent Study of Polar and Non-Polar Structures. Materials 2022, 15, 2756. https://doi.org/10.3390/ma15082756
Koronski K, Korona KP, Kryvyi S, Wierzbicka A, Sobczak K, Krukowski S, Strak P, Monroy E, Kaminska A. The Role of the Built-In Electric Field in Recombination Processes of GaN/AlGaN Quantum Wells: Temperature- and Pressure-Dependent Study of Polar and Non-Polar Structures. Materials. 2022; 15(8):2756. https://doi.org/10.3390/ma15082756
Chicago/Turabian StyleKoronski, Kamil, Krzysztof P. Korona, Serhii Kryvyi, Aleksandra Wierzbicka, Kamil Sobczak, Stanislaw Krukowski, Pawel Strak, Eva Monroy, and Agata Kaminska. 2022. "The Role of the Built-In Electric Field in Recombination Processes of GaN/AlGaN Quantum Wells: Temperature- and Pressure-Dependent Study of Polar and Non-Polar Structures" Materials 15, no. 8: 2756. https://doi.org/10.3390/ma15082756