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Bai Y, Li Y, Wang R, Li Y. NIR Laser‐Treatment, Anti‐Oxidation Upconversion Nanoparticles for Optical Temperature Sensing. ChemistrySelect 2021. [DOI: 10.1002/slct.202102487] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Yandong Bai
- Tianjin Union Medical Center No.190 Jieyuan Road, Hongqiao District Tianjin 300121 China
| | - Yuemei Li
- Xiamen Cardiovascular Hospital Xiamen University No.2999 Jinshan Road, Huli District Xiamen Fujian 361015 China
| | - Rui Wang
- School of Chemistry and Chemical Engineering Harbin Institute of Technology No.92 Xidazhi Street, Nangang District Harbin Heilongjiang 150001 China
| | - Yongmei Li
- NHC Key Laboratory of Hormones and Development Tianjin Key Laboratory of Metabolic Diseases Tianjin Medical University Chu Hsien-I Memorial Hospital & Tianjin Institute of Endocrinology Tianjin Medical University No.6 Huanrui North Road, Ruijing Street, Beichen District Tianjin 300134 China
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Limbu S, Singh LR, Okram GS. The effect of lithium on structural and luminescence performance of tunable light-emitting nanophosphors for white LEDs. RSC Adv 2020; 10:35619-35635. [PMID: 35517071 PMCID: PMC9056912 DOI: 10.1039/d0ra05433j] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2020] [Accepted: 09/17/2020] [Indexed: 12/02/2022] Open
Abstract
Li+ incorporated tunable Y2O3:Eu3+ red-emitting nanophosphors were synthesized using a wet chemical method. The effect of Li+ on structural and luminescence properties of the nanophosphors were studied in detail. The structural results exhibited that nanophosphors have a body-centered cubic (I) phase with point group symmetry m3̄. No additional impurity peaks were observed within the range of the XRD pattern due to the Li+ ion. FTIR spectra reveal the formation of the pure and crystalline structure of the nanophosphors. TEM results show the prepared nanophosphors were highly crystalline and polycrystalline in nature. PL studies show the highly enhanced emission band due to the flux effect, greatly improved crystallinity caused by the Li+ ion, and the different excitation wavelengths. The most intense luminescence band was observed at 612 nm for red emission ascribed to the 5D0 → 7F2 transition of Eu3+ ion upon 254, 393, and 465 nm excitations in the C3i and C2 symmetry site of Y2O3 respectively. The highly enhanced emission band was observed under excitation at 254 nm and is 6.9 and 3.67 times higher than the emission band excited at 393 and 466 nm, respectively. The average lifetime also varies with different concentrations of Li+ ions. The chromaticity color coordinates, CCT values, were tuned in the red region of the color space. Hence, the results indicate that the prepared nanophosphor can be used as a red component to construct the white light for light-emitting diode applications. Li+ incorporated tunable Y2O3:Eu3+ red-emitting nanophosphors were synthesized using a wet chemical method.![]()
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Affiliation(s)
- Sanjeeb Limbu
- Department of Nanotechnology, North-Eastern Hill University Shillong-793022 India +91-364-2723903
| | - Laishram Robindro Singh
- Department of Nanotechnology, North-Eastern Hill University Shillong-793022 India +91-364-2723903
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Tiwari N, Dubey V. Luminescence studies and infrared emission of erbium-doped calcium zirconate phosphor. LUMINESCENCE 2015; 31:837-42. [PMID: 26456020 DOI: 10.1002/bio.3039] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2015] [Revised: 06/09/2015] [Accepted: 08/18/2015] [Indexed: 11/11/2022]
Abstract
The near-infrared-to-visible upconversion luminescence behaviour of Er(3+)-doped CaZrO3 phosphor is discussed in this manuscript. The phosphor was prepared by a combustion synthesis technique that is suitable for less-time-taking techniques for nanophosphors. The starting materials used for sample preparation were Ca(NO3)2.4H2O, Zr(NO3)4 and Er(NO3)2, and urea was used as a fuel. The prepared sample was characterized by X-ray diffraction (XRD). The surface morphology of prepared phosphor was determined by field emission gun scanning electron microscopy (FEGSEM). The functional group analysis was determined by Fourier transform infrared (FTIR) spectroscopy. All prepared phosphors with variable Er(3+) concentrations (0.5-2.5 mol%) were studied by photoluminescence analysis. It was found that the excitation spectra of the prepared phosphor showed a sharp excitation peak centred at 980 nm. The emission spectra with variable Er(3+) concentrations showed strong peaks in the 555 nm and 567 nm range, with a dominant peak at 555 nm due to the ((2)H(11/2),(4)S(3/2)) transition and a weaker transition at 567 nm associated with 527 nm. Spectrophotometric determination of the peak was evaluated by the Commission Internationale de I'Eclairage (CIE) method These upconverted emissions were attributed to a two-photon process. The excitation wavelength dependence of the upconverted luminescence, together with its time evolution after infrared pulsed excitation, suggested that energy transfer upconversion processes were responsible for the upconversion luminescence. The upconversion mechanisms were studied in detail through laser power dependence. Excited state absorption and energy transfer processes were discussed as possible upconversion mechanisms. The cross-relaxation process in Er(3+) was also investigated.
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Affiliation(s)
- Neha Tiwari
- Department of Physics Govt. Model Science College, Jabalpur, India
| | - Vikas Dubey
- Department of Physics, Bhilai Institute of Technology, Raipur, India
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Som S, Das S, Dutta S, Visser HG, Pandey MK, Kumar P, Dubey RK, Sharma SK. Synthesis of strong red emitting Y2O3:Eu3+ phosphor by potential chemical routes: comparative investigations on the structural evolutions, photometric properties and Judd–Ofelt analysis. RSC Adv 2015. [DOI: 10.1039/c5ra13247a] [Citation(s) in RCA: 111] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
Abstract
A comparative investigation on the structural and photoluminescence properties of Y2O3:Eu3+ phosphor prepared by different routes such as sol-lyophilisation, combustion, hydrothermal and microwave assisted hydrothermal combustion, has been reported for the first time.
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Affiliation(s)
- S. Som
- Department of Chemical Engineering
- National Taiwan University
- Taipei
- Taiwan
- Department of Applied Physics
| | - Subrata Das
- Department of Chemical Engineering
- National Taiwan University
- Taipei
- Taiwan
- Department of Applied Physics
| | - S. Dutta
- Department of Applied Physics
- Indian School of Mines
- Dhanbad
- India
- Department of Chemistry
| | - Hendrik G. Visser
- Department of Chemistry
- University of the Free State
- Bloemfontein 9300
- South Africa
| | | | - Pushpendra Kumar
- Institute of Atomic and Molecular Sciences
- Academia Sinica
- Taipei
- Taiwan
| | - Ritesh Kumar Dubey
- Department of Physics
- S.G.R.P.G. College
- Purvanchal University
- Jaunpur
- India
| | - S. K. Sharma
- Department of Applied Physics
- Indian School of Mines
- Dhanbad
- India
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Dubey V, Kaur J, Agrawal S. Effect of europium concentration on photoluminescence and thermoluminescence behavior of Y2O3:Eu3+ phosphor. RESEARCH ON CHEMICAL INTERMEDIATES 2014. [DOI: 10.1007/s11164-014-1563-3] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Shi J, Ye J, Ma L, Ouyang S, Jing D, Guo L. Site-Selected Doping of Upconversion Luminescent Er3+into SrTiO3for Visible-Light-Driven Photocatalytic H2or O2Evolution. Chemistry 2012; 18:7543-51. [PMID: 22532311 DOI: 10.1002/chem.201102807] [Citation(s) in RCA: 83] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2011] [Revised: 02/03/2012] [Indexed: 02/02/2023]
Affiliation(s)
- Jinwen Shi
- International Research Center for Renewable Energy, State Key Laboratory of Multiphase Flow in Power Engineering (MFPE), Xi'an Jiaotong University (XJTU), 28 West Xianning Road, Xi'an, Shaanxi 710049, PR China
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Devaraju M, Yin S, Sato T. Synthesis and characterization Y2O3:Eu3+ nanocrystals prepared via solvothermal refluxing route. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2009. [DOI: 10.1016/j.msec.2009.02.022] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Silver J, Withnall R. Probes of structural and electronic environments of phosphor activators: Mössbauer and Raman spectroscopy. Chem Rev 2005; 104:2833-55. [PMID: 15186182 DOI: 10.1021/cr0203544] [Citation(s) in RCA: 37] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Jack Silver
- Center for Phosphors and Display Materials, University of Greenwich, Central Avenue, Chatham Maritime, Kent ME4 4TB, UK.
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Tanner PA, Zhou X, Liu F. Assignment of Electronic Transitions and Electron−Phonon Coupling of Er3+ Doped into Y2O3. J Phys Chem A 2004. [DOI: 10.1021/jp046217n] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Peter A. Tanner
- Department of Biology and Chemistry, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong S.A.R., People's Republic of China
| | - Xianju Zhou
- Department of Biology and Chemistry, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong S.A.R., People's Republic of China
| | - Fengyi Liu
- Department of Biology and Chemistry, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong S.A.R., People's Republic of China
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Affiliation(s)
- François Auzel
- GOTR, UMR 7574-CNRS, 1, Place A-Briand, 92195 Meudon Cedex, France
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Silver J, Barrett E, Marsh PJ, Withnall R. Yttrium Oxide Upconverting Phosphors. 5. Upconversion Luminescent Emission from Holmium-Doped Yttrium Oxide under 632.8 nm Light Excitation. J Phys Chem B 2003. [DOI: 10.1021/jp034160j] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- J. Silver
- Centre for Phosphors and Display Materials, University of Greenwich, Chatham Maritime Campus, Chatham, Kent ME4 4TB, United Kingdom
| | - E. Barrett
- Centre for Phosphors and Display Materials, University of Greenwich, Chatham Maritime Campus, Chatham, Kent ME4 4TB, United Kingdom
| | - P. J. Marsh
- Centre for Phosphors and Display Materials, University of Greenwich, Chatham Maritime Campus, Chatham, Kent ME4 4TB, United Kingdom
| | - R. Withnall
- Centre for Phosphors and Display Materials, University of Greenwich, Chatham Maritime Campus, Chatham, Kent ME4 4TB, United Kingdom
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Withnall R, Martinez-Rubio MI, Fern GR, Ireland TG, Silver J. Photonic phosphors based on cubic Y2O3:Tb3 infilled into a synthetic opal lattice. ACTA ACUST UNITED AC 2003. [DOI: 10.1088/1464-4258/5/4/359] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Silver J, Martinez-Rubio MI, Ireland TG, Fern GR, Withnall R. Yttrium Oxide Upconverting Phosphors. Part 4: Upconversion Luminescent Emission from Thulium-Doped Yttrium Oxide under 632.8-nm Light Excitation. J Phys Chem B 2003. [DOI: 10.1021/jp021372s] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- J. Silver
- Centre for Phosphors and Display Materials, Chemical and Life Sciences, University of Greenwich, Chatham Maritime Campus, Chatham, Kent ME4 4TB, United Kingdom
| | - M. I. Martinez-Rubio
- Centre for Phosphors and Display Materials, Chemical and Life Sciences, University of Greenwich, Chatham Maritime Campus, Chatham, Kent ME4 4TB, United Kingdom
| | - T. G. Ireland
- Centre for Phosphors and Display Materials, Chemical and Life Sciences, University of Greenwich, Chatham Maritime Campus, Chatham, Kent ME4 4TB, United Kingdom
| | - G. R. Fern
- Centre for Phosphors and Display Materials, Chemical and Life Sciences, University of Greenwich, Chatham Maritime Campus, Chatham, Kent ME4 4TB, United Kingdom
| | - R. Withnall
- Centre for Phosphors and Display Materials, Chemical and Life Sciences, University of Greenwich, Chatham Maritime Campus, Chatham, Kent ME4 4TB, United Kingdom
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Silver J, Martinez-Rubio MI, Ireland TG, Fern GR, Withnall R. Yttrium Oxide Upconverting Phosphors. 3. Upconversion Luminescent Emission from Europium-Doped Yttrium Oxide under 632.8 nm Light Excitation. J Phys Chem B 2001. [DOI: 10.1021/jp011143q] [Citation(s) in RCA: 55] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- J. Silver
- Centre for Phosphors and Display Materials, Chemical and Life Sciences, University of Greenwich, London SE18 6PF, United Kingdom
| | - M. I. Martinez-Rubio
- Centre for Phosphors and Display Materials, Chemical and Life Sciences, University of Greenwich, London SE18 6PF, United Kingdom
| | - T. G. Ireland
- Centre for Phosphors and Display Materials, Chemical and Life Sciences, University of Greenwich, London SE18 6PF, United Kingdom
| | - G. R. Fern
- Centre for Phosphors and Display Materials, Chemical and Life Sciences, University of Greenwich, London SE18 6PF, United Kingdom
| | - R. Withnall
- Centre for Phosphors and Display Materials, Chemical and Life Sciences, University of Greenwich, London SE18 6PF, United Kingdom
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