Preparation and characterization of long afterglow M2MgSi2O7-based (M: Ca, Sr, Ba) photoluminescent phosphors

Autor:	D.R. Chen, Ce-Wen Nan, Yuanhua Lin, Junbo Wu, Haifeng Wang, Xisong Zhou, Shengming Xu
Rok vydání:	2003
Předmět:	Photoluminescence Chemistry Analytical chemistry Sintering General Materials Science Phosphor Emission spectrum Condensed Matter Physics Decay curve Afterglow
Zdroj:	Materials Chemistry and Physics. 82:860-863
ISSN:	0254-0584
Popis:	M 2 MgSi 2 O 7 :Eu, Dy (M: Ca, Sr, Ba) phosphors were prepared via sintering at 1300 °C for 3 h in a weak reductive atmosphere of flowing 5% H 2 –95% N 2 gas. The emission spectra of these phosphors showed that the main emissions are peaking at 537.5, 475.6 and 500.3 nm due to 4f → 5d transitions of Eu 2+ . The decay curves indicated that all of these phosphors have long afterglow feature, especially Sr 2 MgSi 2 O 7 :Eu, Dy phosphor. It is the Dy 3+ trap levels that resulted in the long afterglow in M 2 MgSi 2 O 7 hosts.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::6b44bb97e7bd2bca6376cd6c20142e13 https://doi.org/10.1016/j.matchemphys.2003.07.015 Zobrazit plný text záznamu Full Text from ScienceDirect