| 摘要 |
The invention relates to illumination devices (1) with a light source (2) and an afterglow surface (4) comprising a phosphor. The phosphor has an afterglow emission peak at a temperature above about 100° C. and/or has the formula (Sr1-zMz)4Al14O25:Eu, Ln, Xk with M &egr; {Ca, Ba, Mg}, Ln &egr; {Dy, Nd}, X &egr; {Yb, Tm, Sm}.
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