Emission analysis of Pr3+ and Tm3+: Ca2Gd2W3O14 phosphors
Identifieur interne : 000186 ( Pascal/Curation ); précédent : 000185; suivant : 000187Emission analysis of Pr3+ and Tm3+: Ca2Gd2W3O14 phosphors
Auteurs : S. Sailaja [Inde] ; S. J. Dhoble [Inde] ; C. Nageswara Raju [Inde] ; B. Sudhakar Reddy [Inde]Source :
- Physica. B, Condensed matter [ 0921-4526 ] ; 2012.
Descripteurs français
- Pascal (Inist)
- Réaction état solide, Photoluminescence, Diffraction RX, Microscopie électronique balayage, Dopage, Spectrométrie dispersive, Addition praséodyme, Addition thulium, Spectrométrie FTIR, Transition niveau énergie, Calcium Gadolinium Tungstate Mixte, Spectre excitation, Transfert charge, Matériau luminescent.
- Wicri :
- topic : Dopage.
English descriptors
- KwdEn :
- Calcium Gadolinium Tungstates Mixed, Charge transfer, Dispersive spectrometry, Doping, Energy-level transitions, Excitation spectrum, Fourier-transformed infrared spectrometry, Phosphors, Photoluminescence, Praseodymium additions, Scanning electron microscopy, Solid state reaction, Thulium additions, XRD.
Abstract
5 mol% of Pr3+ and Tm3+ ions activated calcium gadolinium tungstate (Ca2Gd2W3O14) phosphors were synthesized by traditional solid state reaction method. Crystalline phase structure was identified from the X-ray diffraction (XRD) profiles. From the scanning electron microscopy (SEM) images, we have observed the agglomeration of the particles, and average grain size is around 40-300 nm. Using the energy dispersive X-ray analysis (EDAX) and Fourier transform infrared (FTIR) spectra, identified the elements and functional groups present in the prepared phosphors. The emission spectrum of Pr3+: Ca2Gd2W3O14 powder phosphors have shown an intense red emission at 615 nm with the excitation wavelength λexci=450 nm and thus these red color emitting powder phosphors are used as one of the components in the preparation of WLEDs. The excitation spectrum of Tm3+: Ca2Gd2W3O14 powder phosphor has shown a ligand to metal charge transfer (W-O) band (LMCT) within the WO2-4 group. Emission spectrum of Tm3+: Ca2Gd2W3O14 phosphors have shown blue emissions at 453 nm (1D2→3F4).
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and Tm<sup>3+</sup>
: Ca<sub>2</sub>
Gd<sub>2</sub>
W<sub>3</sub>
O<sub>14</sub>
phosphors</title>
<author><name sortKey="Sailaja, S" sort="Sailaja, S" uniqKey="Sailaja S" first="S." last="Sailaja">S. Sailaja</name>
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<author><name sortKey="Nageswara Raju, C" sort="Nageswara Raju, C" uniqKey="Nageswara Raju C" first="C." last="Nageswara Raju">C. Nageswara Raju</name>
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<sourceDesc><biblStruct><analytic><title xml:lang="en" level="a">Emission analysis of Pr<sup>3+</sup>
and Tm<sup>3+</sup>
: Ca<sub>2</sub>
Gd<sub>2</sub>
W<sub>3</sub>
O<sub>14</sub>
phosphors</title>
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<author><name sortKey="Dhoble, S J" sort="Dhoble, S J" uniqKey="Dhoble S" first="S. J." last="Dhoble">S. J. Dhoble</name>
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<author><name sortKey="Nageswara Raju, C" sort="Nageswara Raju, C" uniqKey="Nageswara Raju C" first="C." last="Nageswara Raju">C. Nageswara Raju</name>
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<sZ>3 aut.</sZ>
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<author><name sortKey="Sudhakar Reddy, B" sort="Sudhakar Reddy, B" uniqKey="Sudhakar Reddy B" first="B." last="Sudhakar Reddy">B. Sudhakar Reddy</name>
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<series><title level="j" type="main">Physica. B, Condensed matter</title>
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<profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Calcium Gadolinium Tungstates Mixed</term>
<term>Charge transfer</term>
<term>Dispersive spectrometry</term>
<term>Doping</term>
<term>Energy-level transitions</term>
<term>Excitation spectrum</term>
<term>Fourier-transformed infrared spectrometry</term>
<term>Phosphors</term>
<term>Photoluminescence</term>
<term>Praseodymium additions</term>
<term>Scanning electron microscopy</term>
<term>Solid state reaction</term>
<term>Thulium additions</term>
<term>XRD</term>
</keywords>
<keywords scheme="Pascal" xml:lang="fr"><term>Réaction état solide</term>
<term>Photoluminescence</term>
<term>Diffraction RX</term>
<term>Microscopie électronique balayage</term>
<term>Dopage</term>
<term>Spectrométrie dispersive</term>
<term>Addition praséodyme</term>
<term>Addition thulium</term>
<term>Spectrométrie FTIR</term>
<term>Transition niveau énergie</term>
<term>Calcium Gadolinium Tungstate Mixte</term>
<term>Spectre excitation</term>
<term>Transfert charge</term>
<term>Matériau luminescent</term>
</keywords>
<keywords scheme="Wicri" type="topic" xml:lang="fr"><term>Dopage</term>
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<front><div type="abstract" xml:lang="en">5 mol% of Pr<sup>3+</sup>
and Tm<sup>3+</sup>
ions activated calcium gadolinium tungstate (Ca<sub>2</sub>
Gd<sub>2</sub>
W<sub>3</sub>
O<sub>14</sub>
) phosphors were synthesized by traditional solid state reaction method. Crystalline phase structure was identified from the X-ray diffraction (XRD) profiles. From the scanning electron microscopy (SEM) images, we have observed the agglomeration of the particles, and average grain size is around 40-300 nm. Using the energy dispersive X-ray analysis (EDAX) and Fourier transform infrared (FTIR) spectra, identified the elements and functional groups present in the prepared phosphors. The emission spectrum of Pr<sup>3+</sup>
: Ca<sub>2</sub>
Gd<sub>2</sub>
W<sub>3</sub>
O<sub>14</sub>
powder phosphors have shown an intense red emission at 615 nm with the excitation wavelength λ<sub>exci</sub>
=450 nm and thus these red color emitting powder phosphors are used as one of the components in the preparation of WLEDs. The excitation spectrum of Tm<sup>3+</sup>
: Ca<sub>2</sub>
Gd<sub>2</sub>
W<sub>3</sub>
O<sub>14</sub>
powder phosphor has shown a ligand to metal charge transfer (W-O) band (LMCT) within the WO<sup>2-</sup>
<sub>4</sub>
group. Emission spectrum of Tm<sup>3+</sup>
: Ca<sub>2</sub>
Gd<sub>2</sub>
W<sub>3</sub>
O<sub>14</sub>
phosphors have shown blue emissions at 453 nm (<sup>1</sup>
D<sub>2</sub>
→<sup>3</sup>
F<sub>4</sub>
).</div>
</front>
</TEI>
<inist><standard h6="B"><pA><fA01 i1="01" i2="1"><s0>0921-4526</s0>
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<fA08 i1="01" i2="1" l="ENG"><s1>Emission analysis of Pr<sup>3+</sup>
and Tm<sup>3+</sup>
: Ca<sub>2</sub>
Gd<sub>2</sub>
W<sub>3</sub>
O<sub>14</sub>
phosphors</s1>
</fA08>
<fA11 i1="01" i2="1"><s1>SAILAJA (S.)</s1>
</fA11>
<fA11 i1="02" i2="1"><s1>DHOBLE (S. J.)</s1>
</fA11>
<fA11 i1="03" i2="1"><s1>NAGESWARA RAJU (C.)</s1>
</fA11>
<fA11 i1="04" i2="1"><s1>SUDHAKAR REDDY (B.)</s1>
</fA11>
<fA14 i1="01"><s1>Department of Physics (Research Centre), S.V. Degree College</s1>
<s2>Kadapa 516003</s2>
<s3>IND</s3>
<sZ>1 aut.</sZ>
<sZ>3 aut.</sZ>
<sZ>4 aut.</sZ>
</fA14>
<fA14 i1="02"><s1>Department of Physics, RTM Nagpur University</s1>
<s2>Nagpur 440 001</s2>
<s3>IND</s3>
<sZ>2 aut.</sZ>
</fA14>
<fA20><s1>103-107</s1>
</fA20>
<fA21><s1>2012</s1>
</fA21>
<fA23 i1="01"><s0>ENG</s0>
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<s5>354000507342100190</s5>
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<s1>© 2012 INIST-CNRS. All rights reserved.</s1>
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<fA45><s0>23 ref.</s0>
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<fA47 i1="01" i2="1"><s0>12-0017319</s0>
</fA47>
<fA60><s1>P</s1>
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<fA66 i1="01"><s0>GBR</s0>
</fA66>
<fC01 i1="01" l="ENG"><s0>5 mol% of Pr<sup>3+</sup>
and Tm<sup>3+</sup>
ions activated calcium gadolinium tungstate (Ca<sub>2</sub>
Gd<sub>2</sub>
W<sub>3</sub>
O<sub>14</sub>
) phosphors were synthesized by traditional solid state reaction method. Crystalline phase structure was identified from the X-ray diffraction (XRD) profiles. From the scanning electron microscopy (SEM) images, we have observed the agglomeration of the particles, and average grain size is around 40-300 nm. Using the energy dispersive X-ray analysis (EDAX) and Fourier transform infrared (FTIR) spectra, identified the elements and functional groups present in the prepared phosphors. The emission spectrum of Pr<sup>3+</sup>
: Ca<sub>2</sub>
Gd<sub>2</sub>
W<sub>3</sub>
O<sub>14</sub>
powder phosphors have shown an intense red emission at 615 nm with the excitation wavelength λ<sub>exci</sub>
=450 nm and thus these red color emitting powder phosphors are used as one of the components in the preparation of WLEDs. The excitation spectrum of Tm<sup>3+</sup>
: Ca<sub>2</sub>
Gd<sub>2</sub>
W<sub>3</sub>
O<sub>14</sub>
powder phosphor has shown a ligand to metal charge transfer (W-O) band (LMCT) within the WO<sup>2-</sup>
<sub>4</sub>
group. Emission spectrum of Tm<sup>3+</sup>
: Ca<sub>2</sub>
Gd<sub>2</sub>
W<sub>3</sub>
O<sub>14</sub>
phosphors have shown blue emissions at 453 nm (<sup>1</sup>
D<sub>2</sub>
→<sup>3</sup>
F<sub>4</sub>
).</s0>
</fC01>
<fC02 i1="01" i2="3"><s0>001B70H55H</s0>
</fC02>
<fC03 i1="01" i2="X" l="FRE"><s0>Réaction état solide</s0>
<s5>02</s5>
</fC03>
<fC03 i1="01" i2="X" l="ENG"><s0>Solid state reaction</s0>
<s5>02</s5>
</fC03>
<fC03 i1="01" i2="X" l="SPA"><s0>Reacción estado sólido</s0>
<s5>02</s5>
</fC03>
<fC03 i1="02" i2="3" l="FRE"><s0>Photoluminescence</s0>
<s5>03</s5>
</fC03>
<fC03 i1="02" i2="3" l="ENG"><s0>Photoluminescence</s0>
<s5>03</s5>
</fC03>
<fC03 i1="03" i2="3" l="FRE"><s0>Diffraction RX</s0>
<s5>04</s5>
</fC03>
<fC03 i1="03" i2="3" l="ENG"><s0>XRD</s0>
<s5>04</s5>
</fC03>
<fC03 i1="04" i2="3" l="FRE"><s0>Microscopie électronique balayage</s0>
<s5>05</s5>
</fC03>
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<s5>05</s5>
</fC03>
<fC03 i1="05" i2="X" l="FRE"><s0>Dopage</s0>
<s5>06</s5>
</fC03>
<fC03 i1="05" i2="X" l="ENG"><s0>Doping</s0>
<s5>06</s5>
</fC03>
<fC03 i1="05" i2="X" l="SPA"><s0>Doping</s0>
<s5>06</s5>
</fC03>
<fC03 i1="06" i2="X" l="FRE"><s0>Spectrométrie dispersive</s0>
<s5>07</s5>
</fC03>
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<s5>07</s5>
</fC03>
<fC03 i1="06" i2="X" l="SPA"><s0>Espectrometría dispersiva</s0>
<s5>07</s5>
</fC03>
<fC03 i1="07" i2="3" l="FRE"><s0>Addition praséodyme</s0>
<s5>08</s5>
</fC03>
<fC03 i1="07" i2="3" l="ENG"><s0>Praseodymium additions</s0>
<s5>08</s5>
</fC03>
<fC03 i1="08" i2="3" l="FRE"><s0>Addition thulium</s0>
<s5>09</s5>
</fC03>
<fC03 i1="08" i2="3" l="ENG"><s0>Thulium additions</s0>
<s5>09</s5>
</fC03>
<fC03 i1="09" i2="X" l="FRE"><s0>Spectrométrie FTIR</s0>
<s5>10</s5>
</fC03>
<fC03 i1="09" i2="X" l="ENG"><s0>Fourier-transformed infrared spectrometry</s0>
<s5>10</s5>
</fC03>
<fC03 i1="09" i2="X" l="SPA"><s0>Espectrometría FTIR</s0>
<s5>10</s5>
</fC03>
<fC03 i1="10" i2="3" l="FRE"><s0>Transition niveau énergie</s0>
<s5>11</s5>
</fC03>
<fC03 i1="10" i2="3" l="ENG"><s0>Energy-level transitions</s0>
<s5>11</s5>
</fC03>
<fC03 i1="11" i2="X" l="FRE"><s0>Calcium Gadolinium Tungstate Mixte</s0>
<s2>NC</s2>
<s2>NA</s2>
<s5>12</s5>
</fC03>
<fC03 i1="11" i2="X" l="ENG"><s0>Calcium Gadolinium Tungstates Mixed</s0>
<s2>NC</s2>
<s2>NA</s2>
<s5>12</s5>
</fC03>
<fC03 i1="11" i2="X" l="SPA"><s0>Mixto</s0>
<s2>NC</s2>
<s2>NA</s2>
<s5>12</s5>
</fC03>
<fC03 i1="12" i2="X" l="FRE"><s0>Spectre excitation</s0>
<s5>13</s5>
</fC03>
<fC03 i1="12" i2="X" l="ENG"><s0>Excitation spectrum</s0>
<s5>13</s5>
</fC03>
<fC03 i1="12" i2="X" l="SPA"><s0>Espectro excitación</s0>
<s5>13</s5>
</fC03>
<fC03 i1="13" i2="X" l="FRE"><s0>Transfert charge</s0>
<s5>14</s5>
</fC03>
<fC03 i1="13" i2="X" l="ENG"><s0>Charge transfer</s0>
<s5>14</s5>
</fC03>
<fC03 i1="13" i2="X" l="SPA"><s0>Transferencia carga</s0>
<s5>14</s5>
</fC03>
<fC03 i1="14" i2="3" l="FRE"><s0>Matériau luminescent</s0>
<s5>15</s5>
</fC03>
<fC03 i1="14" i2="3" l="ENG"><s0>Phosphors</s0>
<s5>15</s5>
</fC03>
<fN21><s1>002</s1>
</fN21>
</pA>
</standard>
</inist>
</record>
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