A novel red Ca8.5Pb0.5Eu(PO4)7 phosphor for light emitting diodes application

Deyneko, D.V.; Morozov, V.A.; Joke, H.; Savon, A.E.; Spassky, D.A.; Stefanovich, S.Y.; Belik, A.A.; Lazoryak, B.I.

Статья опубликована в высокорейтинговом журнале

Информация о цитировании статьи получена из Web of Science, Scopus
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 19 октября 2015 г.

Авторы: Deyneko Dina V., Morozov Vladimir A., Joke Hadermann, Savon Alexander E., Spassky Dmitry A., Stefanovich Sergey Yu, Belik Alexei A., Lazoryak Bogdan I.
Журнал: Journal of Alloys and Compounds
Том: 647
Год издания: 2015
Издательство: Elsevier BV
Местоположение издательства: Netherlands
Первая страница: 965
Последняя страница: 972
DOI: 10.1016/j.jallcom.2015.06.123
Аннотация: Ca9exPbxEu(PO4)7 (0 < x < 1) solid solutions with a whitlockite-type (or b-Ca3(PO4)2-type) structure (sp.gr. R3c) were prepared by a standard solid-state method in air. Their luminescent properties under near-ultraviolet (n-UV) light were investigated. Excitation spectra of Ca9exPbxEu(PO4)7 showed the strongest absorption at about 395 nm, which matches well with commercially available n-UV-emitting GaN-based LED chips. Emission spectra indicated an intense red emission due to the 5D0/7F2 transition of Eu3þ, with a maximum in the intensity for Ca8.5Pb0.5Eu(PO4)7. The emission intensity of Ca8.5Pb0.5Eu(PO4)7 was about 1.8 times higher than that of a Ca9Eu(PO4)7 phosphor. We suggest that the introduction of Pb2þ is an efficient approach to enhance luminescence properties of such phosphors. We clarified the influence of the Ca2þ / Pb2þ substitution on intensities of three bands for the 5D0 / 7F0 transition in excitation spectra of Ca9exPbxEu(PO4)7. In addition, we found a reversible first-order phase transition from R3с to R3с symmetry by second-harmonic generation in the range from 753 K (x = 1) to 846 K (x = 0).
Добавил в систему: Дейнеко Дина Валерьевна

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A novel red Ca8.5Pb0.5Eu(PO4)7 phosphor for light emitting diodes applicationстатья

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