Effect of non-stoichiometry on the occurrence of Er3+ luminescence sites in erbium-implanted zinc selenide |
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| Affiliation: | 1. SATIE, ENS Cachan, CNRS, Universite Paris-Saclay, 61 av President Wilson, F-94230 Cachan, France;2. Imperial College, London SW7 2AZ, United Kingdom;3. CMTR, ICMPE, CNRS-UPEC, 2-8 rue Henri Dunant, F-94320 Thiais, France;1. Faculty of Physics, Hanoi University of Science, Vietnam National University, 334 Nguyen Trai, Thanh Xuan, Hanoi, Vietnam;2. Center for Materials Science, Faculty of Physics, Hanoi University of Science, Vietnam National University, 334 Nguyen Trai, Thanh Xuan, Hanoi, Vietnam;1. Department of Chemistry, King’s College London, London, United Kingdom;2. Chemistry Research Laboratory, University of Oxford, Oxford, United Kingdom;3. Living Systems Institute & Department of Physics, University of Exeter, Exeter, United Kingdom;4. Department of Physics, King’s College London, London, United Kingdom |
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| Abstract: | Erbium-implanted ZnSe cubic crystals with a high VZn concentration gave luminescence due to Er3+ ions at Znsub sites (Centre C) but no luminescence due to Er3+ ions at Znint sites (Centre A) or Sesub sites (Centre B). On the other hand, Centres A and B were detected in samples with low VZn concentrations but Centre C was absent. To detect luminescence due to all three erbium centres moderate VZn concentrations were necessary. In such samples post-implantation annealing at 250–325°C caused Er3+ ions to occupy Sesub and Znint sites but annealing at 400°C caused Er3+ ions to migrate from the Sesub sites and be detected at Znsub sites. |
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