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Effect of c-axis inclination angle on the properties of ZnO/Zn1-xCdxO/ZnO quantum wells
Linköping University, Department of Physics, Chemistry and Biology. Linköping University, Faculty of Science & Engineering. Frantsevich Institute Problems Mat Science NAS Ukraine, Ukraine.
Linköping University, Department of Physics, Chemistry and Biology, Semiconductor Materials. Linköping University, Faculty of Science & Engineering.
Linköping University, Department of Physics, Chemistry and Biology, Semiconductor Materials. Linköping University, Faculty of Science & Engineering.
2016 (English)In: Thin Solid Films, ISSN 0040-6090, E-ISSN 1879-2731, Vol. 603, 139-148 p.Article in journal (Refereed) PublishedText
Abstract [en]

The development of optoelectronic devices based on highly-promising Zn1 - xCdxO semiconductor system demands deep understanding of the properties of the Zn1 - xCdxO-based quantum wells (QWs). In this regard, we carried out a numerical study of the polarization-related effects in polar, semi-polar and non-polar ZnO/ Zn1 - xCd xO/ZnO QWs with different parameters of the quantum well structure. The effects of well width, barrier thickness, cadmium content in the active layer and c-axis inclination angle on the distribution of the electron and hole wave function and transition energy were investigated using the 6 x 6 k center dot p Hamiltonian and one-dimensional self-consistent solutions of nonlinear Schrodinger-Poisson equations with consideration of spatially varying dielectric constant and effective mass. The strong sensitivity of the internal electric field, transition energy and overlap integral to cadmium content and well thickness in the angle range from 0 to 40 degrees was revealed. An unexpected change of the internal electric fields sign was observed at the angles ranging from 70 to 90 degrees. We also found a difference in the electronic properties between (0001)-, (11 (2) over bar2)-and (10 (1) over bar0)-oriented QWs.

Place, publisher, year, edition, pages
ELSEVIER SCIENCE SA , 2016. Vol. 603, 139-148 p.
Keyword [en]
Inclination angle; Quantum well; Polarization; ZnCdO alloy; Transition energy
National Category
Chemical Sciences
Identifiers
URN: urn:nbn:se:liu:diva-127431DOI: 10.1016/j.tsf.2016.02.007ISI: 000372794900022OAI: oai:DiVA.org:liu-127431DiVA: diva2:925258
Note

Funding Agencies|Swedish Institute scholarship

Available from: 2016-05-01 Created: 2016-04-26 Last updated: 2016-05-24

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Shtepliuk, IvanKhranovskyy, VolodymyrYakimova, Rositsa
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