کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
606567 | 1454535 | 2015 | 8 صفحه PDF | دانلود رایگان |
• We reported a simple and mass-production method to synthesize the LaOF crystals.
• Several morphologies were obtained by fluoride sources.
• The Ln-doped LaOF exhibit strong characteristic emission with different colors.
• The multicolor emissions were obtained in LaOF:Tb3+,Eu3+ samples.
In this paper, well defined LaOF crystals with multiform morphologies were first prepared via the urea-based precipitation method followed by a heat treatment. The morphologies of the LaOF samples, including nanospheres and nanorods, can be easily modulated by changing the fluorine sources. XRD, FT-IR, SEM, TEM, and emission spectra were used to characterize the prepared samples. Under ultraviolet excitation, the LaOF:Ln3+ nanospheres display the characteristic f–f transitions of Ln3+ (Ln = Eu, Tb) ions and give bright red, and green emissions, respectively. Furthermore, by codoping the Tb3+ and Eu3+ ions into LaOF host and varying the doping concentration of the Eu3+ ions, multicolor tunable emissions have been obtained under the irradiation of 379 nm. These results show this material may have potential applications in field-emission displays.
This work investigates a facile and mass-production method to synthesize multiform morphologies of LaOF and obtains multicolor emissions in LaOF:Tb3+,Eu3+ samples.Figure optionsDownload high-quality image (198 K)Download as PowerPoint slide
Journal: Journal of Colloid and Interface Science - Volume 460, 15 December 2015, Pages 273–280