Shallow Donors and Acceptors in GaN; Bound Excitons and Pair Spectra

• Authors: R. Stępniewski , A. Wysmołek
• Languages of publication: EN

Abstracts

EN

Recent photoluminescence results obtained for homoepitaxial GaN layers are presented. Dominant photoluminescence structures observed for these layers can be assigned to excitons bound to neutral impurities. Different methods such as temperature dependent evolution, high magnetic field and time resolved spectroscopy have been used to study the exciton line properties. For the p-type samples sharp lines are observed, assigned to the donor-acceptor recombination for differently distant pairs. The analysis of the optical transitions related to donors and acceptors is in reasonable agreement with the effective mass approximation. Electron phonon interaction was found to strongly affect the optical properties of GaN. The dominant intrinsic defect has been identified as a donor located at a nitrogen site.

Keywords

EN

71.35.-y; 71.55.Eq; 71.38.+i

Discipline

• 71.55.Eq: III-V semiconductors
• 71.35.-y: Excitons and related phenomena

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 1996
• Volume: 90
• Issue: 4
• Pages: 681-690

Dates

published

1996-10

Contributors

author

R. Stępniewski

• Institute of Experimental Physics, University of Warsaw, Hoża 69, 00-681 Warsaw, Poland

author

A. Wysmołek

• Institute of Experimental Physics, University of Warsaw, Hoża 69, 00-681 Warsaw, Poland

Identifiers

DOI

10.12693/APhysPolA.90.681