Photoluminescence spectra from GaN(Mg,Eu) showing photodissociation of Eu-Mg defects

Dataset

Description

We have investigated temperature-dependent photoluminescence (TDPL) profiles of Eu3+ ions implanted in an HVPE-grown bulk GaN sample doped with Mg and of donor-acceptor pairs (DAP) involving the shallow Mg acceptor in GaN(Mg) (unimplanted) and GaN(Mg):Eu samples. Below 125 K, the TDPL of Eu3+ in GaN(Mg):Eu correlates with that of the DAP. Below 75 K, the intensity of Eu3+ emission saturates, indicating a limitation of the numbers of Eu-Mg defects available to receive excitation transferred from the host, while the DAP continues to increase, albeit more slowly in the implanted than the unimplanted sample. Prolonged exposure to UV light at low temperature results in the photodissociation of Eu-Mg defects, in their Eu1(Mg) configuration, with a corresponding increase in shallow DAP emission and the emergence of emission from unassociated EuGa (Eu2) defects.

Further discussion of these results can be found in the associated paper in the Journal of Physics D: Applied Physics by A. K. Singh et al.: "Eu-Mg defects and donor-acceptor pairs in GaN: photodissociation and the excitation transfer problem". File names correspond to figures in this paper.
Date made available8 Dec 2017
PublisherUniversity of Strathclyde
Date of data production2017

Research Output

Eu-Mg defects and donor-acceptor pairs in GaN: photodissociation and the excitation transfer problem

Singh, A. K., O'Donnell, K. P., Edwards, P. R., Lorenz, K., Leach, J. H. & Boćkowski, M., 22 Jan 2018, In : Journal of Physics D: Applied Physics. 51, 6, 5 p., 065106.

Research output: Contribution to journalArticle

Open Access
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  • 4 Citations (Scopus)
    27 Downloads (Pure)

    Projects

    Activities

    • 1 Participation in conference

    UK Nitrides Consortium Winter Conference 2018

    Paul Edwards (Speaker)
    10 Jan 2018

    Activity: Participating in or organising an event typesParticipation in conference

    Cite this

    Singh, A. (Creator), O'Donnell, K. (Creator), Edwards, P. (Creator) (8 Dec 2017). Photoluminescence spectra from GaN(Mg,Eu) showing photodissociation of Eu-Mg defects. University of Strathclyde. Data_description(.txt), Figure1(.txt), Figure1_inset(.txt), Figure2(.txt), Figure3(.txt), Figure4(.txt), Figure5(.txt), FigureS1(.txt), FigureS2(.txt). 10.15129/b5965c02-9c07-4459-ad04-91197abfe40f