Crystal chemistry and photoluminescent investigation of novel white light emanating Dy3+ doped Ca9Bi(VO4)7 nanophosphor for ultraviolet based white LEDs

被引：43
作者：
Phogat, Priya [1 ]
Khatkar, S. P. [1 ]
Malik, R. K. [1 ]
Sushma [1 ]
Dalal, Jyoti [1 ]
Hooda, Pooja [1 ]
Taxak, V. B. [1 ]
机构：
[1] Maharshi Dayanand Univ, Dept Chem, Rohtak 124001, Haryana, India
来源：
MATERIALS CHEMISTRY AND PHYSICS | 2021年 / 270卷
关键词：
Rietveld refinement; Radiative lifetime; Photoluminescence; Quantum efficiency; Ca9Bi(VO4)(7):Dy3+; ENERGY-TRANSFER; EU3+ NANOPHOSPHOR; LUMINESCENCE; PHOSPHOR; EFFICIENCY; EMISSION; SPECTRUM;
D O I：
10.1016/j.matchemphys.2021.124828
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
A novel series of white light emitting Ca9Bi(1-x)Dyx (VO4)(7) nanophosphor has been prepared via urea-assisted solution combustion method for the very first time. Structural aspects of the synthesized nanophosphors are investigated by means of X-ray diffraction patterns. The Rietveld refinement performed on host Ca9Bi(VO4)(7) and optimal luminescent composition Ca9Bi0.80Dy0.20(VO4)(7) authenticate crystallization in trigonal lattice and space group as R3c (161). The emission spectra exhibit peaks due to F-4(9/2)-> H-6(11/2, 13/2, 15/2) characteristic transitions of Dy3+ ions on excitation at 389 nm wavelength in ultraviolet region. The band gap for Ca9Bi(VO4)(7) has been estimated to be 3.27 eV. The dipole-dipole type interactions are responsible for concentration quenching phenomena in trivalent dysprosium doped Ca9Bi(VO4)(7) post 20 mol% composition of dopant ions. The intrinsic lifetime value (0.418 ms) and non-radiative rate (132.27 s(-1)) are determined by employing Auzel's model. The chromaticity coordinates (x = 0.288, y = 0.338), correlated color temperature (7760 K) and quantum efficiency value (95%) indicate towards a cool and efficient white light emanating Ca9Bi0.80Dy0.20(VO4)(7) nanophosphor. The crystal and optical properties of the prepared nanophosphor vividly define its potential usage as ultraviolet triggered white light emitting source for lighting applications.
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页数：10
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共 44 条
[1]   Novel white light emitting dysprosium oxalate nanocrystals: Competing luminescence quenching by the features of Dy-Oxalate layered structure [J].
Alexander, Dinu ;
Thomas, Kukku ;
Gopinath, R. J. Manju ;
Joy, Monu ;
Biju, P. R. ;
Unnikrishnan, N., V ;
Joseph, Cyriac .
JOURNAL OF ALLOYS AND COMPOUNDS, 2019, 804 :252-261
[2]   A promising orange-red emitting nanocrystalline NaCaBO3:Sm3+ phosphor for solid state lightning [J].
Bedyal, A. K. ;
Kumar, Vinay ;
Ntwaeaborwa, O. M. ;
Swart, H. C. .
MATERIALS RESEARCH EXPRESS, 2014, 1 (01)
[3]   Crystal growth of Sr3NaNbO6 and Sr3NaTaO6:: New photoluminescent oxides [J].
Bharathy, M. ;
Rassolov, V. A. ;
Loye, H. -C. zur .
CHEMISTRY OF MATERIALS, 2008, 20 (06) :2268-2273
[4]   Structural and photoluminescent analysis in Judd-Ofelt framework of color tunable SrGd2(1-x)Eu2xAl2O7 nanophosphor for white light emitting materials [J].
Chahar, Sangeeta ;
Devi, Rekha ;
Dalal, Mandeep ;
Boora, Priti ;
Taxak, V. B. ;
Khatkar, S. P. .
JOURNAL OF LUMINESCENCE, 2018, 194 :271-278
[5]   Ba2W3O11:Eu3+-Density functional and experimental analysis of crystal, electronic and optical properties [J].
Dalal, Jyoti ;
Khatkar, Avni ;
Dalal, Mandeep ;
Chahar, Sangeeta ;
Phogat, Priya ;
Taxak, V. B. ;
Khatkar, S. P. .
JOURNAL OF ALLOYS AND COMPOUNDS, 2020, 821
[6]   A hybrid treatment of Ba2LaV3O11: Eu3+ nanophosphor system: First-principal and experimental investigations into electronic, crystal and the optical structure [J].
Dalal, Mandeep ;
Dalal, Jyoti ;
Chahar, Sangeeta ;
Dahiya, Hina ;
Devi, Sushma ;
Dhankhar, Priyanka ;
Kumar, Satish ;
Taxak, V. B. ;
Kumar, Dinesh ;
Khatkar, S. P. .
JOURNAL OF ALLOYS AND COMPOUNDS, 2019, 805 :84-96
[7]   Energy transfer and photoluminescent analysis of a novel color-tunable Ba2Y1-xV3O11:xSm3+ nanophosphor for single-phased phosphor-converted white LEDs [J].
Dalal, Mandeep ;
Chahar, Sangeeta ;
Dalal, Jyoti ;
Devi, Rekha ;
Kumar, Dinesh ;
Devi, Sushma ;
Taxak, V. B. ;
Khatkar, Avni ;
Kumar, Mukesh ;
Khatkar, S. P. .
CERAMICS INTERNATIONAL, 2018, 44 (09) :10531-10538
[8]   Photoluminescence and structural properties of Eu3+ doped SrZnV2O7 nanocrystals [J].
Dalal, Mandeep ;
Taxak, Vinod B. ;
Lohra, Sheetal ;
Sangwan, Dayawati ;
Khatkar, S. P. .
JOURNAL OF LUMINESCENCE, 2015, 161 :63-70
[9]   Blue light emitting ceramic nano-pigments of Tm3+ doped YAlO3: Applications in latent finger print, anti-counterfeiting and porcelain stoneware [J].
Darshan, G. P. ;
Premkumar, H. B. ;
Nagabhushana, H. ;
Sharma, S. C. ;
Prashantha, S. C. ;
Nagaswarup, H. P. ;
Prasad, B. Daruka .
DYES AND PIGMENTS, 2016, 131 :268-281
[10]   Luminescence and photometric characterization of K+ compensated CaMoO4:Dy3+ nanophosphors [J].
Dutta, S. ;
Som, S. ;
Sharma, S. K. .
DALTON TRANSACTIONS, 2013, 42 (26) :9654-9661
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