کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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1332436 | 979042 | 2011 | 8 صفحه PDF | دانلود رایگان |
In this work, Sr3Al2O6: Eu2+ (Eu3+), Dy3+ phosphors have been prepared by hydrothermal treatment and subsequently postannealing approach, using Sr(NO3)2, Al(NO3)3·9H2O, and CO(NH2)2 as starting materials. The as-obtained phosphors were characterized by means of XRPD, FESEM, and PL techniques. In addition, many reaction parameters were studied in detail, including the initial mole ratios, hydrothermal reaction temperature, calcination temperature and calcination atmosphere. Remarkably, two scientific merits exist herein: Sr3Al2O6: Eu2+ (Eu3+), Dy3+ phosphors can be selectively obtained in a reducing atmosphere (H2/Ar, 20%+80%) and in air, respectively; adding certain amount of sodium citrate can alter the shape and size of Sr3Al2O6: Eu2+ (Eu3+), Dy3+ phosphors in essence. Besides, the luminescent properties of Sr3Al2O6: Eu2+ (Eu3+), Dy3+ phosphors were studied by excitation spectra, emission spectra and decay curves.
We present a simple and efficient hydrothermal treatment and subsequently postannealing approach to prepare Sr3Al2O6: Eu2+ (Eu3+), Dy3+ phosphors on a large scale.Figure optionsDownload as PowerPoint slide
Journal: Journal of Solid State Chemistry - Volume 183, Issue 9, September 2010, Pages 2004–2011