SrMoO4:Er3+-Yb3+ upconverting phosphor for photonic and forensic applications |
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| Affiliation: | 1. College of Science, Northwest A&F University, Yangling, Shaanxi 712100, PR China;2. Department of Physics, Pukyong National University, Busan 608-737, Republic of Korea;1. College of Sciences, Chongqing University of Posts and Telecommunications, Chongqing, 400065, PR China;2. Institute of Physics, Polish Academy of Sciences, Al. Lotników 32/46, Warsaw, 02-668, Poland;3. Key Laboratory for Renewable Energy, Beijing Key Laboratory for New Energy Materials and Devices, Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing, 100190, PR China;4. University of Chinese Academy of Sciences, Beijing, 100049, PR China;5. Institute of Physics, University of Tartu, Ravila 14C Tartu, 50411, Estonia;6. Institute of Physics, Jan Dlugosz University, Al. Armii Krajowej 13/15, Czestochowa PL, 42200, Poland;1. Vinča Institute of Nuclear Sciences, University of Belgrade, P.O. Box 522, 11001 Belgrade, Serbia;2. Institute of Solid State Physics, University of Latvia, 8 Kengaraga Street, Riga, LV 1063, Latvia;1. College of Sciences, Chongqing University of Posts and Telecommunications, Chongqing, 400065, PR China;2. Institute of Physics, Polish Academy of Sciences, Al. Lotników 32/46, Warsaw, 02-668, Poland;3. College of Optoelectronic Engineering, Chongqing University of Posts and Telecommunications, Chongqing, 400065, PR China;4. National Engineering Research Center for Rare Earth Materials, General Research Institute for Nonferrous Metals, and Grirem Advanced Materials Co., Ltd., Beijing, 100088, PR China |
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| Abstract: | The Er3+-Yb3+ codoped strontium molybdate (SrMoO4) phosphors have been synthesized via chemical co-precipitation method by adding ammonium hydroxide as a base reagent. The phase, crystal structure and formation of spindle-like particles present in the prepared phosphors have been recognized by using the X-ray powder diffraction (XRPD) and Field emission scanning electron microscopy (FE-SEM) techniques. The Fourier transform infrared (FTIR) spectroscopy of the developed phosphors has been analyzed to mark the different functional groups present in synthesized phosphors. The multicolour upconversion emissions observed upon excitation with 980 nm and 808 nm laser diode have been explained on the basis of dopants ions concentration, pump power dependence, energy level structure and decay curve analysis. The colour co-ordinate study confirmed that the codoped phosphor emits non-tunable green colour when excited with the 980 nm laser diode, whereas it shows the colour tunability from yellow to green region upon excitation with the 808 nm laser diode. The applicability of non-tunable green colour emission has been demonstrated in the security ink and latent finger print detection. This shows the utility of the developed phosphors in the photonic and forensic applications. |
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| Keywords: | Strontium molybdate Rare earth Colour coordinate Decay time Photonic devices |
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