Hysteretic photochromic switching (HPS) in doubly doped GaN(Mg):Eu—a summary of recent results

Paul R. Edwards, Kevin P. O'Donnell, Akhilesh K. Singh, Douglas Cameron, Katharina Lorenz, Mitsuo Yamaga, Jacob H. Leach, Menno J. Kappers, Michal Boćkowski

Research output: Contribution to journalArticle

Abstract

Europium is the most-studied and least-well-understood rare earth ion (REI) dopant in GaN. While attempting to increase the efficiency of red GaN light-emitting diodes (LEDs) by implanting Eu+ into p-type GaN templates, the Strathclyde University group, in collaboration with IST Lisbon and Unipress Warsaw, discovered hysteretic photochromic switching (HPS) in the photoluminescence spectrum of doubly doped GaN(Mg):Eu. Our recent work, summarised in this contribution, has used time-, temperature- and light-induced changes in the Eu intra-4f shell emission spectrum to deduce the microscopic nature of the Mg-Eu defects that form in this material. As well as shedding light on the Mg acceptor in GaN, we propose a possible role for these emission centres in quantum information and computing.
LanguageEnglish
Article number1800
Number of pages9
JournalMaterials
Volume11
Issue number10
DOIs
StatePublished - 22 Sep 2018

Fingerprint

Europium
Rare earths
Light emitting diodes
Photoluminescence
Doping (additives)
Ions
Defects
Temperature

Keywords

  • gallium nitride
  • rare earth ions
  • europium
  • photoluminescence
  • photochromism
  • qubit

Cite this

Edwards, Paul R. ; O'Donnell, Kevin P. ; Singh, Akhilesh K. ; Cameron, Douglas ; Lorenz, Katharina ; Yamaga, Mitsuo ; Leach, Jacob H. ; Kappers, Menno J. ; Boćkowski, Michal. / Hysteretic photochromic switching (HPS) in doubly doped GaN(Mg):Eu—a summary of recent results. In: Materials. 2018 ; Vol. 11, No. 10.
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Hysteretic photochromic switching (HPS) in doubly doped GaN(Mg):Eu—a summary of recent results. / Edwards, Paul R.; O'Donnell, Kevin P.; Singh, Akhilesh K.; Cameron, Douglas; Lorenz, Katharina; Yamaga, Mitsuo; Leach, Jacob H.; Kappers, Menno J.; Boćkowski, Michal.

In: Materials, Vol. 11, No. 10, 1800, 22.09.2018.

Research output: Contribution to journalArticle

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T1 - Hysteretic photochromic switching (HPS) in doubly doped GaN(Mg):Eu—a summary of recent results

AU - Edwards,Paul R.

AU - O'Donnell,Kevin P.

AU - Singh,Akhilesh K.

AU - Cameron,Douglas

AU - Lorenz,Katharina

AU - Yamaga,Mitsuo

AU - Leach,Jacob H.

AU - Kappers,Menno J.

AU - Boćkowski,Michal

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KW - europium

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