ФТП, 2007, том 41, выпуск 5
ФТП, 2007, том 41, выпуск 5
| Содержание | Предыдущая статья | Следующая статья | Поиск |
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Cathodoluminescence properties of yttrium alluminium garnet doped
with Eu and Eu ions
A.N.Trofimov, M.A.Petrova, M.V.Zamoryanskaya
Ioffe Physicotechnical Institute, Russian Academy of Sciences,
194021 St. Petersburg, Russia
Khlopin Radium Institute,
194021 St. Petersburg, Russia
(Получена 12 сентября 2006 г. Принята к печати 3 октября 2006 г.)
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Yttrium aluminium garnet (YAG) doped with Eu and Eu ions is very interesting as a phosphor for conversion of light-emitting diode light for white light sources. Europium ion occupies the structural position of yttrium in yttrium aluminium garnet and has valence state Eu. Our sample was doped with Zr, that is why part of europium ions had valence state Eu. As a rule luminescence of Eu ions is observed in orange and red range of spectrum. The luminescence of Eu in yttrium aluminium garnet is characterized by intensive broad band with maximum of intensity at about 560 nm (green color). In this work it was studied the intensity and decay time dependences on europium concentration, and the influence of excitation power density on cathodoluminescence of the sample. The more interesting result is the change of visible cathodoluminescence color in dependence on the density of exciting power. PACS: 78.60.Hk, 71.55.Ht, 78.47.+p, 85.60.Jb |
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