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The microstructure of non-polar a-plane (11 2¯0) InGaN quantum wells
- Source :
- Griffiths, J T, Oehler, F, Tang, F, Zhang, S, Fu, W Y, Zhu, T, Findlay, S D, Zheng, C, Etheridge, J, Martin, T L, Bagot, P A J, Moody, M P, Sutherland, D, Dawson, P, Kappers, M J, Humphreys, C J & Oliver, R A 2016, ' The microstructure of non-polar a-plane (11 2 0) InGaN quantum wells ', Journal of Applied Physics, vol. 119, no. 17, 175703 . https://doi.org/10.1063/1.4948299, Griffiths, J T, Oehler, F, Tang, F, Zhang, S, Fu, W Y, Zhu, T, Findlay, S D, Zheng, C, Etheridge, J, Martin, T L, Bagot, P A J, Moody, M P, Sutherland, D, Dawson, P, Kappers, M J, Humphreys, C J & Oliver, R A 2016, ' The microstructure of non-polar a-plane (11 2¯ 0) InGaN quantum wells ', Journal of Applied Physics, vol. 119, no. 17, 175703 . https://doi.org/10.1063/1.4948299
- Publication Year :
- 2016
-
Abstract
- Atom probe tomography and quantitative scanning transmission electron microscopy are used to assess the composition of non-polar a-plane (11-20) InGaN quantum wells for applications in optoelectronics. The average quantum well composition measured by atom probe tomography and quantitative scanning transmission electron microscopy quantitatively agrees with measurements by X-ray diffraction. Atom probe tomography is further applied to study the distribution of indium atoms in non-polar a-plane (11-20) InGaN quantum wells. An inhomogeneous indium distribution is observed by frequency distribution analysis of the atom probe tomography measurements. The optical properties of non-polar (11-20) InGaN quantum wells with indium compositions varying from 7.9% to 20.6% are studied. In contrast to non-polar m-plane (1-100) InGaN quantum wells, the non-polar a-plane (11-20) InGaN quantum wells emit at longer emission wavelengths at the equivalent indium composition. The non-polar a-plane (11-20) quantum wells also show broader spectral linewidths. The longer emission wavelengths and broader spectral linewidths may be related to the observed inhomogeneous indium distribution.
- Subjects :
- Diffraction
Photoluminescence
Materials science
image sensors
General Physics and Astronomy
chemistry.chemical_element
indium
02 engineering and technology
Atom probe
Physics and Astronomy(all)
linewidths
01 natural sciences
Molecular physics
law.invention
law
0103 physical sciences
Scanning transmission electron microscopy
Quantum well
010302 applied physics
Condensed Matter::Quantum Gases
Condensed matter physics
Wide-bandgap semiconductor
021001 nanoscience & nanotechnology
Wavelength
quantum wells
x-ray diffraction
chemistry
0210 nano-technology
Indium
Subjects
Details
- ISSN :
- 10897550 and 00218979
- Volume :
- 119
- Issue :
- 17
- Database :
- OpenAIRE
- Journal :
- Journal of Applied Physics
- Accession number :
- edsair.doi.dedup.....e92e0b2589ed337b97d4e06530a20c0e