Skip to main content
×
Home

Interface and Luminescence Properties of Pulsed Laser Deposited MgxZn1-xO/ZnO Quantum Wells with Strong Confinement

  • Susanne Heitsch (a1), Gregor Zimmermann (a2), Alexander Müller (a3), Jörg Lenzner (a4), Holger Hochmuth (a5), Gabriele Benndorf (a6), Michael Lorenz (a7) and Marius Grundmann (a8)...
Abstract
ABSTRACT

MgxZn1-xO/ZnO/MgxZn1-xO quantum wells (QWs) (0.12 ≤ x ≤ 0.15) have been grown on a-plane sapphire substrates by pulsed laser deposition. The nominal ZnO well layer thickness lies between 1.2 nm and 6 nm. Atomic force microscopy (AFM) investigations at ZnO/MgxZn1−xO heterostructures show the film-like structure of the ZnO layers. Their root mean square surface roughness of ∼ 0.5 nm gives information about the interface roughness in the QWs. AFM results from the MgxZn1−xO barrier layers show the same surface structure and roughness. We confirmed the lateral homogeneity of the Mg distribution in the MgxZn1−xO barrier layers by scanning cathodoluminescence measurements. The QWs show a bright and laterally homogeneous luminescence, suggesting good crystalline quality of the ZnO wells. The measured QW photoluminescence energies agree well with calculated values and display the presence of the quantum-confined Stark effect. As a result of quantum confinement a high-energy shift of the ZnO excitonic photoluminescence of 222 meV is observed in the thinnest QW.

Copyright
References
Hide All
1. See, for example, Makino T., Superlattice. Microst. 38, 231 (2005) and references therein.
2.Morhain C., Bretagnon T., Lefebvre P., Tang X., Valvin P., Guillet T., Gil B., Taliercio T., Teisseire-Doninelli M., Vinter B., Deparis C., Phys. Rev. B 72, 241305 (R) (2005).
3.Morhain C., Tang X., Teisseire-Doninelli M., Lo B., Laügt M., Chauveau J.-M., Vinter B., Tottereau O., Vennéguès P., Deparis C., Neu G., Superlattice. Microst. 38, 455 (2005).
4.Heitsch S., Benndorf G., Zimmermann G., Schulz C., Spemann D., Hochmuth H., Schmidt H., Nobis Th., Lorenz M., Grundmann M., Appl. Phys. A (in press), and references therein.
5.Ohtomo A., Kawasaki M., Ohkubo I., Koinuma H., Yasuda T., Segawa Y., Appl. Phys. Lett. 75, 980 (1999).
6.Sadofev S., Blumstengel S., Cui J., Puls J., Rogaschewski S., Schäfer P., Sadofyev Y. G., Henneberger F., Appl. Phys. Lett. 87, 091903 (2005).
7.Krishnamoorthy S., Iliadis A.A., Inumpudi A., Choopun S., Vispute R.D., Venkatesan T., Solid-State Electron. 46, 1633 (2002).
8.Muth J.F., Teng C.W., Sharma A.K., Kvit A., Kolbas R.M., Narayan J., Mat. Res. Soc. Symp. 617, J6.7 (2000).
9.Heitsch S., Zimmermann G., Fritsch D., Sturm C., Schmidt-Grund R., Schulz C., Hochmuth H., Spemann D., Benndorf G., Rheinländer B., Nobis Th., Lorenz M., and Grundmann M., J. Appl. Phys. (in press).
10.Coli G., Bajaj K. K., Appl. Phys. Lett. 78, 2861 (2001).
11.Button K. J., Cohn D. R., von Ortenbert M., Lax B., Mollwo E., Helbig R., Phys. Rev. Lett. 28, 1637 (1972).
12.Hümmer K., Phys. Status Solidi B 56, 249 (1973).
Recommend this journal

Email your librarian or administrator to recommend adding this journal to your organisation's collection.

MRS Online Proceedings Library (OPL)
  • ISSN: -
  • EISSN: 1946-4274
  • URL: /core/journals/mrs-online-proceedings-library-archive
Please enter your name
Please enter a valid email address
Who would you like to send this to? *
×

Keywords:

Metrics

Full text views

Total number of HTML views: 0
Total number of PDF views: 3 *
Loading metrics...

Abstract views

Total abstract views: 30 *
Loading metrics...

* Views captured on Cambridge Core between September 2016 - 23rd November 2017. This data will be updated every 24 hours.