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Li F, Ye Y, Cui R, Zhang J, Xu C, Xu H, Zhang G, Deng C. Phosphors Ba 2 LaTaO 6 :Mn 4+ and its alkali metal charge compensation for plant growth illumination. LUMINESCENCE 2023; 38:1562-1571. [PMID: 37309260 DOI: 10.1002/bio.4537] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2022] [Revised: 06/06/2023] [Accepted: 06/06/2023] [Indexed: 06/14/2023]
Abstract
A series of Mn4+ -doped and Mn4+ ,K+ -co-doped Ba2 LaTaO6 (BLT) double-perovskite phosphors was synthesized using a high-temperature solid-state reaction. The phase purity and luminescence properties were also studied. The optimum doping concentration of Mn4+ and K+ was obtained by investigating the photoluminescence excitation spectra and photoluminescence emission spectra. The comparison of BLT:Mn4+ phosphors with and without K+ ions shows that the photoluminescence intensity of K+ -doped phosphors was greatly enhanced. This is because there was a charge difference when Mn4+ ions were doped with Ta5+ ions in BLT. Mn4+ -K+ ion pairs were formed after doping K+ ions, which hinders the nonradiative energy transfer between Mn4+ ions. Therefore, the luminescence intensity, quantum yield, and thermal stability of phosphors were enhanced. The electroluminescence spectra of BLT:Mn4+ and BLT:Mn4+ ,K+ were measured. The spectra showed that the light emitted from the phosphors corresponded well with chlorophyll a and phytochrome PR . The results show that the BLT:Mn4+ ,K+ phosphors had good luminescence properties and application prospects and are ideal materials for plant-illuminated red phosphors.
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Affiliation(s)
- Fadong Li
- Key Laboratory of Functional Composite Materials of Guizhou Province, College of Big Data and Information Engineering, Guizhou University, Guiyang, China
- School of Electronics and Information Engineering, Guiyang University, Guiyang, China
| | - Yaosen Ye
- Key Laboratory of Functional Composite Materials of Guizhou Province, College of Big Data and Information Engineering, Guizhou University, Guiyang, China
| | - Ruirui Cui
- Key Laboratory of Functional Composite Materials of Guizhou Province, College of Big Data and Information Engineering, Guizhou University, Guiyang, China
| | - Jun Zhang
- College of Computer and Information Engineering, Guizhou University of Commerce, Guiyang, China
| | - Cong Xu
- Key Laboratory of Functional Composite Materials of Guizhou Province, College of Big Data and Information Engineering, Guizhou University, Guiyang, China
| | - Hui Xu
- Key Laboratory of Functional Composite Materials of Guizhou Province, College of Big Data and Information Engineering, Guizhou University, Guiyang, China
| | - Gangyi Zhang
- Key Laboratory of Functional Composite Materials of Guizhou Province, College of Big Data and Information Engineering, Guizhou University, Guiyang, China
| | - Chaoyong Deng
- Key Laboratory of Functional Composite Materials of Guizhou Province, College of Big Data and Information Engineering, Guizhou University, Guiyang, China
- School of Electronics and Information Engineering, Guiyang University, Guiyang, China
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Study of structural, electronic, magnetic, and optical properties of A2FeMnO6 (A= Ba, La) double perovskites, Experimental and DFT Analysis. Colloids Surf A Physicochem Eng Asp 2023. [DOI: 10.1016/j.colsurfa.2023.131145] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/16/2023]
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3
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Li F, Cui R, Yuan G, Zhang X, Zhang M, Deng C. Preparation and characterization of a new orange-red phosphor Ba2LaTaO6:Eu3+ with abnormal thermal quenching. J RARE EARTH 2022. [DOI: 10.1016/j.jre.2022.10.009] [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]
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Dielectric, AC Conductivity, and DC Conductivity Behaviours of Sr 2CaTeO 6 Double Perovskite. MATERIALS 2022; 15:ma15124363. [PMID: 35744420 PMCID: PMC9227468 DOI: 10.3390/ma15124363] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/26/2022] [Revised: 06/15/2022] [Accepted: 06/17/2022] [Indexed: 02/01/2023]
Abstract
Relatively new double perovskite material, Sr2CaTeO6, has been prepared through conventional solid-state procedures. Structural, dielectric, and optical characteristics of this exquisite solid-state material were analysed in this study. The single-phase monoclinic P21/n structure of this prepared compound was well correlated with the literature review. Good distribution of grain sizes and shapes was observed in the morphological study of this compound. The discussions on its optical and dielectric properties are included in this manuscript. High dielectric real permittivity, low dielectric loss, and good capacitance over a range of temperatures possessed by this compound, as shown in dielectric and electrical modulus studies, indicated good potential values for capacitor applications. The Ro(RgQg)(RgbQgb) circuit fitted well with the impedance and electrical modulus plot of the compound. Its relatively high electrical DC conductivity in grain at high frequencies and its increasing value with the temperature are typical of a semiconductor behaviour. This behaviour might be attributed to the presence of minor oxygen vacancies within its lattice structure and provides a long-range conduction mechanism. A small difference between activation energy and Ea of DC conductivity indicates that the same charge carriers were involved in both grains and the grain boundaries’ long-range conduction. The electrical AC conductivity of this compound was found to contribute to the dielectric loss in grain structure and can be related to Jonscher’s power law. The presence of polarons in this compound was exhibited by non-overlapping small polaron tunnelling (NSPT) and overlapping large polaron tunnelling (OLPT) conduction mechanisms over a range of temperatures. Wide optical band gap and Eopt in the range of 2.6 eV to 3.6 eV were determined by using an indirect and direct allowed mechanism of electrons transitions. These values supported the efficient semiconducting behaviour of the grain in this material and are suitable for applications in the semiconductor industry.
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Wang Y, Ding F, Wu J, Ke J, Yuan X, Wang X, Qiu Z, Zhou W, Zhang J, Lian S. Site Preference-Driven Mn 4+ Stabilization in Double Perovskite Phosphor Regulating Quantum Efficiency from Zero to Champion. Inorg Chem 2022; 61:3631-3640. [PMID: 35176862 DOI: 10.1021/acs.inorgchem.1c03756] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
The tetravalent-state stability of manganese is of primary importance for Mn4+ luminescence. Double perovskite-structured A2B'B″O6:Mn4+ has been recently prevalent, and the manganese ions are assumed to substitute for the B″(IV-VI)O6 site to stabilize at the tetravalent charge state to generate far-red emissions. However, some Mn-doped A2B'B″O6-type materials show no or weak luminescence such as typical Ca2MgWO6:Mn. In this work, a cation-pair co-substitution strategy is proposed to replace 2Ca2+ by Na+-La3+ to form Ca2-2xNaxLaxMgWO6:Mn. The significant structural distortion appears in the solid solution lattices with the contraction of [MgO6] but enlargement of [WO6] octahedron. We hypothesize that the site occupancy preference of Mn migrates from Mg2+ to W6+ sites. As a result, the effective Mn4+/Mn2+ concentration enhances remarkably to regulate nonluminescence to highly efficient Mn4+-related far-red emission. The optimal CaNa0.5La0.5MgWO6:0.9%Mn4+ shows an internal quantum efficiency of 94% and external quantum efficiency of 82%, reaching up to the top values in Mn4+-doped oxide phosphors. This work may provide a new perspective for the rational design of Mn4+-activated red phosphors, primarily considering the site occupancy modification and tetravalent-state stability of Mn.
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Affiliation(s)
- Yufei Wang
- Key Laboratory of Light Energy Conversion Materials of Hunan Province College, College of Chemistry and Chemical Engineering, Hunan Normal University, Changsha, Hunan 410081, China
| | - Fan Ding
- Key Laboratory of Light Energy Conversion Materials of Hunan Province College, College of Chemistry and Chemical Engineering, Hunan Normal University, Changsha, Hunan 410081, China
| | - Jiayu Wu
- Key Laboratory of Light Energy Conversion Materials of Hunan Province College, College of Chemistry and Chemical Engineering, Hunan Normal University, Changsha, Hunan 410081, China
| | - Jingbo Ke
- Key Laboratory of Light Energy Conversion Materials of Hunan Province College, College of Chemistry and Chemical Engineering, Hunan Normal University, Changsha, Hunan 410081, China
| | - Xiaoze Yuan
- State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, P. R. China.,National Energy Center for Coal to Liquids, Synfuels China Co., Ltd., Huairou District, Beijing 101400, P. R. China.,University of Chinese Academy of Sciences, Beijing 100049, P. R. China
| | - Xiaofang Wang
- Key Laboratory of Light Energy Conversion Materials of Hunan Province College, College of Chemistry and Chemical Engineering, Hunan Normal University, Changsha, Hunan 410081, China
| | - Zhongxian Qiu
- Key Laboratory of Light Energy Conversion Materials of Hunan Province College, College of Chemistry and Chemical Engineering, Hunan Normal University, Changsha, Hunan 410081, China.,State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, P. R. China
| | - Wenli Zhou
- Key Laboratory of Light Energy Conversion Materials of Hunan Province College, College of Chemistry and Chemical Engineering, Hunan Normal University, Changsha, Hunan 410081, China
| | - Jilin Zhang
- Key Laboratory of Light Energy Conversion Materials of Hunan Province College, College of Chemistry and Chemical Engineering, Hunan Normal University, Changsha, Hunan 410081, China
| | - Shixun Lian
- Key Laboratory of Light Energy Conversion Materials of Hunan Province College, College of Chemistry and Chemical Engineering, Hunan Normal University, Changsha, Hunan 410081, China
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Zaraq A, Gregory DH, Orayech B, Igartua JM, El Bouari A, Eales JD, Bingham PA, Gesing TM. Effects of iron substitution and anti-site disorder on crystal structures, vibrational, optical and magnetic properties of double perovskites Sr 2(Fe 1−xNi x)TeO 6. Dalton Trans 2022; 51:17368-17380. [DOI: 10.1039/d2dt02447k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
We report a new series of DP Sr2(Fe1−xNix)TeO6, which have different transition metal Fe and Ni on B sites, providing an opportunity to investigate their effect on crystal structure, vibrational, optical and magnetic properties.
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Affiliation(s)
- Asmaa Zaraq
- University of Bremen, Institute of Inorganic Chemistry and Crystallography, Bremen, Germany
- WestCHEM School of Chemistry, University of Glasgow, Joseph Black Building, Glasgow G12 8QQ, UK
| | - Duncan H. Gregory
- WestCHEM School of Chemistry, University of Glasgow, Joseph Black Building, Glasgow G12 8QQ, UK
| | - Brahim Orayech
- Maxam, Technology Center Energetic Materials, Carretera N-623 km 28., 09141 Quintanilla Sobresierra. Burgos, Spain
| | - Josu M. Igartua
- Universidad del País Vasco/Euskal Herriko Unibertsitatea UPV/EHU: Leioa, Bizkaia, España
| | - Abdeslam El Bouari
- Laboratory of Physical-Chemistry, Materials and Catalysis, Department of Chemistry, Faculty of Sciences Ben M'Sik, University Hassan II of Casablanca, Casablanca, Morocco
| | - James D. Eales
- Materials and Engineering Research Institute, Sheffield Hallam University, City Campus, Howard Street, Sheffield, S1 1WB, UK
| | - Paul A. Bingham
- Materials and Engineering Research Institute, Sheffield Hallam University, City Campus, Howard Street, Sheffield, S1 1WB, UK
| | - Thorsten M. Gesing
- University of Bremen, Institute of Inorganic Chemistry and Crystallography, Bremen, Germany
- University of Bremen, MAPEX Center for Materials and Processes, Bremen, Germany
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Alias FIH, Rajmi R, Maulud MF, Mohamed Z. Structural, optical and dielectric properties of tellurium-based double perovskite Sr 2Ni 1-x Zn x TeO 6. RSC Adv 2021; 11:31631-31640. [PMID: 35496881 PMCID: PMC9041436 DOI: 10.1039/d1ra03662a] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2021] [Accepted: 09/18/2021] [Indexed: 12/04/2022] Open
Abstract
In this paper, Sr2Ni1−xZnxTeO6 (x = 0.0, 0.2, 0.4, 0.6, 0.8, 1.0) double perovskite compounds were synthesised by the conventional solid-state method, and the structural, optical and dielectric properties were investigated. The Rietveld refinement of X-ray diffraction data shows that all compounds were crystallised in monoclinic symmetry with the I2/m space group. Morphological scanning electron microscopy reported that the grain sizes decreased as the dopant increased. The UV-vis diffuse reflectance spectroscopy conducted for all samples found that the optical band gap energy, Eg, increased from 3.71 eV to 4.14 eV. The dielectric permittivity ε′ values increased for the highest Zn-doped composition, Sr2Ni0.2Zn0.8TeO6, being ∼1000 and ∼60 in the low- and high-frequency range, respectively. All samples exhibited low dielectric loss (tan δ ≤ 0.20) in the range of 104–105 Hz frequency. Impedance measurement revealed that grain resistance decreased with enhancement in Zn content in the Sr2NiTeO6 crystal lattice. In this paper, Sr2Ni1−xZnxTeO6 (x = 0.0, 0.2, 0.4, 0.6, 0.8, 1.0) double perovskite compounds were synthesised by the conventional solid-state method, and the structural, optical and dielectric properties were investigated.![]()
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Affiliation(s)
| | - Rozilah Rajmi
- Faculty of Applied Sciences, Universiti Teknologi MARA, Perlis Branch, Arau Campus 02600 Arau Perlis Malaysia
| | - Mohd Fauzi Maulud
- Faculty of Applied Sciences, Universiti Teknologi MARA 40450 Shah Alam Selangor Malaysia
| | - Zakiah Mohamed
- Faculty of Applied Sciences, Universiti Teknologi MARA 40450 Shah Alam Selangor Malaysia
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Meng X, Fan C, An X, Yuan S, Jing Y, Liu Z, Sun C, Zhang Y, Zhang Z, Wang M, Zheng H, Li E. Aluminum doping effects on photoresponse characteristics of hydrothermal tin disulfide nanosheets. CrystEngComm 2021. [DOI: 10.1039/d1ce00588j] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Photoresponse characteristics of Al-doped SnS2 nanosheets have been improved significantly by aluminum doping, compared to pristine SnS2. The response time was reduced by two orders of magnitude and the responsivity was increased one hundredfold.
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Albalah MA, Alsabah YA, Mustafa DE. Characteristics of co-precipitation synthesized cobalt nanoferrites and their potential in industrial wastewater treatment. SN APPLIED SCIENCES 2020. [DOI: 10.1007/s42452-020-2586-6] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
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Ding C, Han A, Ye M, Zhang Y, Yao L, Yang J. Hydrothermal synthesis and characterization of novel yellow pigments based on V5+ doped BiPO4 with high near-infrared reflectance. RSC Adv 2018; 8:19690-19700. [PMID: 35541020 PMCID: PMC9080647 DOI: 10.1039/c8ra02406e] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2018] [Accepted: 05/17/2018] [Indexed: 11/21/2022] Open
Abstract
A series of new yellow pigments was synthesized (BiP1−xVxO4), coatings colored with synthesized pigments have high NIR solar reflectance.
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Affiliation(s)
- Cheng Ding
- School of Chemical Engineering
- Nanjing University of Science and Technology
- Nanjing 210094
- China
| | - Aijun Han
- School of Chemical Engineering
- Nanjing University of Science and Technology
- Nanjing 210094
- China
| | - Mingquan Ye
- School of Chemical Engineering
- Nanjing University of Science and Technology
- Nanjing 210094
- China
| | - Yu Zhang
- School of Chemical Engineering
- Nanjing University of Science and Technology
- Nanjing 210094
- China
| | - Lingyun Yao
- School of Chemical Engineering
- Nanjing University of Science and Technology
- Nanjing 210094
- China
| | - Jiling Yang
- School of Chemical Engineering
- Nanjing University of Science and Technology
- Nanjing 210094
- China
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