The impact of 3D compositional fluctuations on the external quantum efficiency and defect generation in nitride alloys with a low in or Al molar fraction

E. I. Shabunina; N. M. Shmidt; A. E. Chernyakov; N. A. Talnishnikh; A. Ya Polyakov; N. B. Smirnov; I. H. Lee

doi:10.1088/1742-6596/917/5/052018

The impact of 3D compositional fluctuations on the external quantum efficiency and defect generation in nitride alloys with a low in or Al molar fraction

E. I. Shabunina, N. M. Shmidt, A. E. Chernyakov, N. A. Talnishnikh, A. Ya Polyakov, N. B. Smirnov, I. H. Lee

Department of Materials Science and Engineering

Research output: Contribution to journal › Conference article › peer-review

Abstract

Peculiarities of the low-frequency noise, the evolution of the full width at half maximum (FWHM) in electroluminescence spectra with the injection current change were studied in InGanN/GaN and AlGaN/GaN MQW containing less than 10% of In and Al components. It was shown that one of the reasons behind the low values of the external quantum efficiency in the LEDs based on these structures is 3D fluctuations in the alloy composition with the local regions of the irregular compound. The results of the investigation of the I-V characteristics and spectral noise density dependences in the LEDs after different aging stages are presented. The defect generation under the injection current during the degradation is shown to occur locally in the extended defects and in the regions of the irregular alloy composition.

Original language	English
Article number	052018
Journal	Journal of Physics: Conference Series
Volume	917
Issue number	5
DOIs	https://doi.org/10.1088/1742-6596/917/5/052018
Publication status	Published - 2017 Nov 23
Event	4th International School and Conference "Saint Petersburg OPEN 2017" on Optoelectronics, Photonics, Engineering and Nanostructures - Saint-Petersburg, Russian Federation Duration: 2017 Apr 3 → 2017 Apr 6

ASJC Scopus subject areas

Physics and Astronomy(all)

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10.1088/1742-6596/917/5/052018

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Shabunina, E. I., Shmidt, N. M., Chernyakov, A. E., Talnishnikh, N. A., Polyakov, A. Y., Smirnov, N. B., & Lee, I. H. (2017). The impact of 3D compositional fluctuations on the external quantum efficiency and defect generation in nitride alloys with a low in or Al molar fraction. Journal of Physics: Conference Series, 917(5), [052018]. https://doi.org/10.1088/1742-6596/917/5/052018

The impact of 3D compositional fluctuations on the external quantum efficiency and defect generation in nitride alloys with a low in or Al molar fraction. / Shabunina, E. I.; Shmidt, N. M.; Chernyakov, A. E. et al.
In: Journal of Physics: Conference Series, Vol. 917, No. 5, 052018, 23.11.2017.

Research output: Contribution to journal › Conference article › peer-review

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title = "The impact of 3D compositional fluctuations on the external quantum efficiency and defect generation in nitride alloys with a low in or Al molar fraction",

abstract = "Peculiarities of the low-frequency noise, the evolution of the full width at half maximum (FWHM) in electroluminescence spectra with the injection current change were studied in InGanN/GaN and AlGaN/GaN MQW containing less than 10% of In and Al components. It was shown that one of the reasons behind the low values of the external quantum efficiency in the LEDs based on these structures is 3D fluctuations in the alloy composition with the local regions of the irregular compound. The results of the investigation of the I-V characteristics and spectral noise density dependences in the LEDs after different aging stages are presented. The defect generation under the injection current during the degradation is shown to occur locally in the extended defects and in the regions of the irregular alloy composition.",

author = "Shabunina, {E. I.} and Shmidt, {N. M.} and Chernyakov, {A. E.} and Talnishnikh, {N. A.} and Polyakov, {A. Ya} and Smirnov, {N. B.} and Lee, {I. H.}",

note = "Publisher Copyright: {\textcopyright} Published under licence by IOP Publishing Ltd.; 4th International School and Conference {"}Saint Petersburg OPEN 2017{"} on Optoelectronics, Photonics, Engineering and Nanostructures ; Conference date: 03-04-2017 Through 06-04-2017",

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T1 - The impact of 3D compositional fluctuations on the external quantum efficiency and defect generation in nitride alloys with a low in or Al molar fraction

AU - Shabunina, E. I.

AU - Shmidt, N. M.

AU - Chernyakov, A. E.

AU - Talnishnikh, N. A.

AU - Polyakov, A. Ya

AU - Smirnov, N. B.

AU - Lee, I. H.

PY - 2017/11/23

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N2 - Peculiarities of the low-frequency noise, the evolution of the full width at half maximum (FWHM) in electroluminescence spectra with the injection current change were studied in InGanN/GaN and AlGaN/GaN MQW containing less than 10% of In and Al components. It was shown that one of the reasons behind the low values of the external quantum efficiency in the LEDs based on these structures is 3D fluctuations in the alloy composition with the local regions of the irregular compound. The results of the investigation of the I-V characteristics and spectral noise density dependences in the LEDs after different aging stages are presented. The defect generation under the injection current during the degradation is shown to occur locally in the extended defects and in the regions of the irregular alloy composition.

AB - Peculiarities of the low-frequency noise, the evolution of the full width at half maximum (FWHM) in electroluminescence spectra with the injection current change were studied in InGanN/GaN and AlGaN/GaN MQW containing less than 10% of In and Al components. It was shown that one of the reasons behind the low values of the external quantum efficiency in the LEDs based on these structures is 3D fluctuations in the alloy composition with the local regions of the irregular compound. The results of the investigation of the I-V characteristics and spectral noise density dependences in the LEDs after different aging stages are presented. The defect generation under the injection current during the degradation is shown to occur locally in the extended defects and in the regions of the irregular alloy composition.

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The impact of 3D compositional fluctuations on the external quantum efficiency and defect generation in nitride alloys with a low in or Al molar fraction

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