Upconversion luminescence of Gd2O3:Er3+and Gd2O3:Er3+/silica nanophosphors fabricated by EDTA combustion method
来源期刊:JOURNAL OF RARE EARTHS2019年第11期
论文作者:Le Quoc Minh Tran Kim Anh Nguyen Duy Hung Pham Thi Minh Chau Nguyen Thi Quy Hai Ho Van Tuyen Vu Thi Thai Ha Vu Duc Tu Wieslaw Strek
文章页码:1126 - 1131
摘 要:Gd2O3:Er3+ nanophosphors were fabricated by the combustion method in presence of Na2 ethylene diamine tetra acetic acid(EDTA-Na2) as fuel at not high temperature(≤350℃) within a very short time of 5 min.The added concentration of Er3+ions in Gd2O3 matrix was changed from 0.5 mol% to 5.0 mol%.The X-ray diffraction pattern of samples indicates the monoclinic structure of Gd2O3:Er3+.The morphology and chemical composition analysis of the Gd2O3:Er3+ samples are characterized by a field emission scanning electron microscope(FESEM) and a Fourier-transform infrared spectrometer(FTIR).The photoluminescence(PL),photo luminescence excitation(PLE) and upconversion(UC) at room temperature of the prepared materials with different concentrations of Er3+ were investigated.The PL of Gd2O3:Er3+nanomaterials are shown in visible at 545,594,623,648,688 nm under excitation at 275 nm.The emission bands from transitions of Er3+ from 2P3/2 to 4F9/2 are observed,UC luminescent spectra of the Gd2O3:Er3+/silica nanocomposites under 976 nm excitation show the bands at 548 and 670 nm.The influence of excitation power at 980 nm for transitions were measured and calculated.The results indicate that the upconversion process of Gd2O3:Er3+/silica is two photons absorption mechanism.The low temperature dependence of UC luminescent intensities of the main bands of Gd2O3:Er3+was investigated towards development of a nanotemperature sensor in the range of 10-300 K.
Le Quoc Minh1,Tran Kim Anh1,Nguyen Duy Hung2,Pham Thi Minh Chau1,Nguyen Thi Quy Hai1,Ho Van Tuyen1,Vu Thi Thai Ha3,Vu Duc Tu3,Wieslaw Strek4
1. Institute of Theoretical and Applied Research,Duy Tan University2. Advanced Institute for Science and Technology,Hanoi University of Science and Technology3. Institute of Materials Science,Vietnam Academy of Science and Technology4. Institute of Low Temperature and Structure Research,Polish Academy of Science 2 Okolna
摘 要:Gd2O3:Er3+ nanophosphors were fabricated by the combustion method in presence of Na2 ethylene diamine tetra acetic acid(EDTA-Na2) as fuel at not high temperature(≤350℃) within a very short time of 5 min.The added concentration of Er3+ions in Gd2O3 matrix was changed from 0.5 mol% to 5.0 mol%.The X-ray diffraction pattern of samples indicates the monoclinic structure of Gd2O3:Er3+.The morphology and chemical composition analysis of the Gd2O3:Er3+ samples are characterized by a field emission scanning electron microscope(FESEM) and a Fourier-transform infrared spectrometer(FTIR).The photoluminescence(PL),photo luminescence excitation(PLE) and upconversion(UC) at room temperature of the prepared materials with different concentrations of Er3+ were investigated.The PL of Gd2O3:Er3+nanomaterials are shown in visible at 545,594,623,648,688 nm under excitation at 275 nm.The emission bands from transitions of Er3+ from 2P3/2 to 4F9/2 are observed,UC luminescent spectra of the Gd2O3:Er3+/silica nanocomposites under 976 nm excitation show the bands at 548 and 670 nm.The influence of excitation power at 980 nm for transitions were measured and calculated.The results indicate that the upconversion process of Gd2O3:Er3+/silica is two photons absorption mechanism.The low temperature dependence of UC luminescent intensities of the main bands of Gd2O3:Er3+was investigated towards development of a nanotemperature sensor in the range of 10-300 K.
关键词: