Unusual green emission from Mn2+ in Gd(BO2)3

Peters, T. M.; Pappalardo, R.; Hunt, R.B.

doi:10.1016/0022-2313(84)90276-x

Cited by 9 publications

(3 citation statements)

References 4 publications

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“…The presence of Gd 3 § lines and a Ce :~+ band in the excitation spectrum of the Tb ' * § ~D4 emission and the fact that mainly Tb ' ~+ emission is observed for 254 nm excitation are evidence of efficient energy transfer from Gd :~ § to Tb 3+ and from Ce ' ~+ to Tb 3+ at this temperature and concentration level. In view of the low concentrations involved, the Ce :~+ to Tb "~+ energy transfer has to occur via the Gd ~+ ions, as in the case of phosphor materials based on gadolinium compounds reported before [e.g., (3,6)].…”

Section: Resultsmentioning

confidence: 99%

Energy Transfer in the Luminescent System Na ( Y , Gd ) F 4 : Ce , Tb

Kiliaan

Kotte

Blasse

1987

J. Electrochem. Soc.

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The luminescent properties of hexagonal NaY,,.,~_.,.Gd.rCe,,.,~,Tbo.0,F4 have been investigated. For x > 0.45 and at room temperature, excitation into the Ce 3+ ion (k~.• = 254 nm) results mainly in Tb :~+ emission. We also observed two different Ce :~+ emissions. This is related to the crystal structure of NaGdF4:Ce,Tb. It is shown that the excitation energy migrates from the Ce 3+ ion over the Gd ~ sublattice to the Tb :~+ traps. Energy transfer probabilities for this process are derived and compared with the probabilities derived for the system LiGdF~:Ce,Tb, which leads to some recommendations for the use of the Ce ' ~+ ion as a sensitizer of the Gd :~+ ion.

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Section: Resultsmentioning

confidence: 99%

Energy Transfer in the Luminescent System Na ( Y , Gd ) F 4 : Ce , Tb

Kiliaan

Kotte

Blasse

1987

J. Electrochem. Soc.

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“…Strong luminescence from the 4 T 1 ( 4 G) state of Mn 2+ ions in O h (red) and T d (green) oxide coordination environments is the basis of successful applications of manganese(II) in commercial phosphors. − However, violet (≃425 nm), blue (≃460 nm), , and orange (≃590 nm) − emissions from Mn 2+ ions doped in crystalline or amorphous materials have also attracted much attention. Whereas intensive spectroscopic studies of many Mn 2+ , doped oxides, ,− oxo salts, ,, sulfides, ,, and halides 9,15-19 have revealed interesting information on the Mn 2+ electronic response to changing ligand field, detailed interpretation of these data is difficult because of uncertainties in the nature (location and symmetry) of the emitting Mn 2+ site. Besides these ambiguities, doping often leads to crystal defects which further complicate luminescence behavior through electronic interactions with the Mn 2+ ions or by their own emission. , Therefore, in order to understand the emission characteristics of Mn 2+ in non- O h and - T d environments, it is desirable to study stoichiometric manganese(II) compounds with well-defined Mn 2+ coordination sites which exhibit the luminescence characteristics of interest.…”

Section: Introductionmentioning

confidence: 99%

“…[1][2][3][4] However, violet (=425 nm), 5 blue (=460 nm), 6,7 and orange (=590 nm) [8][9][10] emissions from Mn 2+ ions doped in crystalline or amorphous materials have also attracted much attention. Whereas intensive spectroscopic studies of many Mn 2+ , doped oxides, 9,[11][12][13][14][15] oxo salts, 5,9,14 sulfides, 8,9,14 and halides 9,[15][16][17][18][19] have revealed interesting information on the Mn 2+ electronic response to changing ligand field, detailed interpretation of these data is difficult because of uncertainties in the nature (location and symmetry) of the emitting Mn 2+ site. Besides these ambiguities, doping often leads to crystal defects which further complicate luminescence behavior through electronic interactions with the Mn 2+ ions or by their own emission.…”

Section: Introductionmentioning

confidence: 99%

Intense Photosensitized Emission from Stoichiometric Compounds Featuring Mn²⁺ in Seven- and Eightfold Coordination Environments

Reid

Kahwa²,

White³

et al. 1998

Inorg. Chem.

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Synthetic, structural and luminescence studies of stoichiometric crown ether compounds of Mn(2+) in well-defined coordination environments were undertaken in an effort to understand the origin of emitting crystal defects found in cubic F23 [(K18C6)(4)MnBr(4)][TlBr(4)](2) crystals (Fender, N. S.; et al. Inorg. Chem. 1997, 36, 5539). The new compound [Mn(12C4)(2)][MnBr(4)](2)[N(CH(3))(4)](2) (3) features Mn(2+) ions in eight- and fourfold coordination environments of [Mn(12C4)(2)](2+) and MnBr(4)(2)(-) respectively, while Mn(2+) in [Mn(15C5)(H(2)O)(2)][TlBr(5)] (4) is in the sevenfold coordination polyhedron of [Mn(15C5)(H(2)O)(2)](2+). Crystal data for 3: monoclinic, P2(1)/c (No. 14); a = 14.131(3) Å, b = 12.158(1) Å, c = 14.239(2) Å, beta = 110.37(1) degrees, Z = 2, R1 = 0.039 and wR2 = 0.083. For 3, long-lived emission (77 K decay rate approximately 3 x 10 s(-)(1)) from [Mn(12C4)(2)](2+) (the first for eight-coordinate Mn(2+) in stoichiometric compounds) is observed (lambda(max) approximately 546 nm) along with that of the sensitizing MnBr(4)(2)(-) (lambda(max) approximately 513 nm), which is partially quenched. Emission from the seven-coordinate [Mn(15C5)(H(2)O)(2)](2+) species of 4 and [Mn(15C5)(H(2)O)(2)][MnBr(4)] (the first for seven-coordinate Mn(2+) in stoichiometric compounds) peaks at lambda(max) approximately 592 nm. Unusually intense absorptions attributable to the seven-coordinate species are observed at 317 ((2)T(2)((2)I) <-- (6)A(1)), 342 ((4)T(1)((4)P) <-- (6)A(1)), 406 ((4)E((4)G) <-- (6)A(1)), and 531 ((4)T(1)((4)G) <-- (6)A(1)) nm.

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Energy Transfer from Gd³⁺ to Er³⁺ in Y_0.34Gd_0.65Er_0.01F₃

Collins

DiBartolo

1995

Physica Status Solidi (b)

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Energy Transfer from Gd3 + to Er3+ in Yo~3,Gdo~,,Ero~o,F, BY J. M. COLLINS (a) and B. DIBARTOLO (b) The energy transfer from the 'P,,, level of Gd3+ to the ,P3 , level of Er3+ is studied in the phosphor Y,,34Gdo,,sEro,olF3. The lifetime of the 6P,!, level of Gdi+ decreases substantially in the presence of Er, indicating that the transfer is nonradiative. The transfer is studied in the temperature range from 20 to 300 K, and is found to be more efficient at low temperatures. A model is proposed to explain this behavior, in which we consider the distribution of the ions in the Stark levels involved in the transfer, and the presence of one-and two-phonon processes.Der Energieubergang vom Gd3+ (6P7,z) Zustand zum Er3+ (2P3,z) Zustand wird in Y0,34Gd0,65Er0,01F3 untersucht. Die Lebensdauer des Gd3 +(6P7,,) Zustandes verringert sich sehf stark, wenn Er Ionen vorhandcn sind, was bedeutet, daB es sich um einen strahlungslosen Ubergang handelt. Der Energieubergang wird im Temperaturbereich von 20 bis 300 K studiert und es wird festgestellt, daIj er bei niedrigeren Temperaturen effizienter ist. Ein Modell wird vorgeschlagen, um diese Ergebnisse zu beschreiben. In diesem Modell werden die Ionenverteilung in den betroffcnen Stark-Niveaus und ein-und zwei-Phononen-Prozesse berucksichtigt.

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Unusual green emission from Mn2+ in Gd(BO2)3

Cited by 9 publications

References 4 publications

Energy Transfer in the Luminescent System Na ( Y , Gd ) F 4 : Ce , Tb

Energy Transfer in the Luminescent System Na ( Y , Gd ) F 4 : Ce , Tb

Intense Photosensitized Emission from Stoichiometric Compounds Featuring Mn²⁺ in Seven- and Eightfold Coordination Environments

Energy Transfer from Gd³⁺ to Er³⁺ in Y_0.34Gd_0.65Er_0.01F₃

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Unusual green emission from Mn2+ in Gd(BO2)3

Cited by 9 publications

References 4 publications

Energy Transfer in the Luminescent System Na ( Y , Gd ) F 4 : Ce , Tb

Energy Transfer in the Luminescent System Na ( Y , Gd ) F 4 : Ce , Tb

Intense Photosensitized Emission from Stoichiometric Compounds Featuring Mn2+ in Seven- and Eightfold Coordination Environments

Energy Transfer from Gd3+ to Er3+ in Y0.34Gd0.65Er0.01F3

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Intense Photosensitized Emission from Stoichiometric Compounds Featuring Mn²⁺ in Seven- and Eightfold Coordination Environments

Energy Transfer from Gd³⁺ to Er³⁺ in Y_0.34Gd_0.65Er_0.01F₃