铈铕共掺杂铌酸锶钡的结构和光致发光研究

N. John
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Photoluminescence studies shows the broad emission peaks at 419, 447, 493 nm due to 5d-4f Ce3+ transition levels. The peaks at 440, 449 nm were also observed due to the emission from SBN and less intense peaks at 558, 576, 588 nm due to the 5D0—7F0, 7F1 transitions of Eu3+ when excited at 305 nm wavelength. From the measured luminescence decay profiles, the tri-exponential lifetime of the 0.1% Cerium, Europium co-doped SBN nano system was calculated at 440 nm emission wavelength. Therefore the cerium europium co-doped SBN can be used for optical applications.Cerium Europium co-doped Strontium barium niobate (SBN) nano ceramic systems at different concentrations were prepared by sol gel method. The structural properties were characterised by X-ray diffraction, FTIR and Raman spectroscopy. X-ray diffraction analysis confirms the tetragonal structure of the prepared system. EDAX analysis confirms the components present in the sample. 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引用次数: 0

摘要

采用溶胶-凝胶法制备了不同浓度的铈铕共掺杂铌酸锶钡纳米陶瓷体系。用x射线衍射、红外光谱和拉曼光谱对其结构性质进行了表征。x射线衍射分析证实了所制备体系的四边形结构。EDAX分析证实了样品中存在的成分。SEM图像显示了纳米体系的针状形态。XRD图像证实了制备的纳米铕铈掺杂SBN的粒径和晶面符合标准值。0.1、0.2%铈、铕共掺杂的SBN纳米体系在291和273 nm处有宽吸收峰。样品中的吸收来自于直接跃迁,计算出能隙值为2.11 eV和。2.27 eV。光致发光研究表明,由于5d-4f Ce3+的跃迁水平,在419、447、493 nm处有宽发射峰。由于SBN的发射,在440、449 nm处也观测到了峰;在305 nm激发下,由于Eu3+的5D0-7F0、7F1跃迁,在558,576,588 nm处也观测到了较弱的峰。根据测量的发光衰减曲线,计算了在440 nm发射波长下0.1%铈、铕共掺杂SBN纳米体系的三指数寿命。因此,铈铕共掺杂SBN可用于光学领域。采用溶胶-凝胶法制备了不同浓度的铈铕共掺杂铌酸锶钡纳米陶瓷体系。用x射线衍射、红外光谱和拉曼光谱对其结构性质进行了表征。x射线衍射分析证实了所制备体系的四边形结构。EDAX分析证实了样品中存在的成分。SEM图像显示了纳米体系的针状形态。XRD图像证实了制备的纳米铕铈掺杂SBN的粒径和晶面符合标准值。0.1、0.2%铈、铕共掺杂的SBN纳米体系在291和273 nm处有宽吸收峰。样品中的吸收来自于直接跃迁,计算出能隙值为2.11 eV和。2.27 eV。光致发光研究表明,由于5d-4f Ce3+的跃迁水平,在419、447、493 nm处有宽发射峰。由于SBN的发射,在440,449 nm处也观察到峰,而在…
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Structural and photoluminescence studies of cerium europium co-doped Strontium barium niobate
Cerium Europium co-doped Strontium barium niobate (SBN) nano ceramic systems at different concentrations were prepared by sol gel method. The structural properties were characterised by X-ray diffraction, FTIR and Raman spectroscopy. X-ray diffraction analysis confirms the tetragonal structure of the prepared system. EDAX analysis confirms the components present in the sample. SEM image shows the needle like morphology of the nano system. XRD image confirms the particle size and crystalline planes of the prepared nanosized cerium europium doped SBN with the standard value. The broad absorption peak at 291 and 273 nm were observed for 0.1, 0.2 % Cerium, Europium co-doped SBN nano system. The absorption in the samples is from direct transition and the values of energy gap were calculated as 2.11 eV and. 2.27 eV. Photoluminescence studies shows the broad emission peaks at 419, 447, 493 nm due to 5d-4f Ce3+ transition levels. The peaks at 440, 449 nm were also observed due to the emission from SBN and less intense peaks at 558, 576, 588 nm due to the 5D0—7F0, 7F1 transitions of Eu3+ when excited at 305 nm wavelength. From the measured luminescence decay profiles, the tri-exponential lifetime of the 0.1% Cerium, Europium co-doped SBN nano system was calculated at 440 nm emission wavelength. Therefore the cerium europium co-doped SBN can be used for optical applications.Cerium Europium co-doped Strontium barium niobate (SBN) nano ceramic systems at different concentrations were prepared by sol gel method. The structural properties were characterised by X-ray diffraction, FTIR and Raman spectroscopy. X-ray diffraction analysis confirms the tetragonal structure of the prepared system. EDAX analysis confirms the components present in the sample. SEM image shows the needle like morphology of the nano system. XRD image confirms the particle size and crystalline planes of the prepared nanosized cerium europium doped SBN with the standard value. The broad absorption peak at 291 and 273 nm were observed for 0.1, 0.2 % Cerium, Europium co-doped SBN nano system. The absorption in the samples is from direct transition and the values of energy gap were calculated as 2.11 eV and. 2.27 eV. Photoluminescence studies shows the broad emission peaks at 419, 447, 493 nm due to 5d-4f Ce3+ transition levels. The peaks at 440, 449 nm were also observed due to the emission from SBN and less in...
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