کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1526490 | 995371 | 2009 | 4 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Luminescent properties of a new blue long-lasting phosphor Ca2P2O7:Eu2+, Y3+ Luminescent properties of a new blue long-lasting phosphor Ca2P2O7:Eu2+, Y3+](/preview/png/1526490.png)
A new pyrophosphate long-lasting phosphor with composition of Ca1.96P2O7:0.02Eu2+, 0.02Y3+ is synthesized via the high-temperature solid-state reaction method. Its properties are systematically investigated utilizing XRD, photoluminescence, phosphorescence and thermoluminescence (TL) spectra. The phosphor emits blue light that is related to the characteristic emission of Eu2+ due to 5d–4f transitions. For the optimized sample, bright blue long-lasting phosphorescence (LLP) could be observed by naked eyes even 6 h after the excitation source is removed. The TL spectra show that the doping of Y3+ ions greatly enhanced intensity of 335 K peak and created new TL peak at about 373 K that is also responsible for the blue LLP. Based on our study, Y3+ ions are suggested to act as electron traps to improve the performance of the blue phosphorescence of Eu2+ such as intensity and persistent time.
Journal: Materials Chemistry and Physics - Volume 113, Issue 1, 15 January 2009, Pages 215–218