An analysis of Y2O3:Eu3+ thin films for thermographic phosphor applications

Bosze, E.; Hirata, G.A.; McKittrick, Joanna

doi:10.1016/j.jlumin.2010.08.025

Cited by 30 publications

(20 citation statements)

References 39 publications

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“…While our ex-situ TI sensing technique relies on the spectral properties of p-Dy:Y 2 O 3 and p-Eu:ZrO 2 for temperature sensing, there are other ex-situ techniques based on the same underlying principle (TI-dependent irreversible phase transitions) but utilize different materials and probe techniques. Some examples of these alternative techniques include: lifetime measurements of Eu:YSZ [14][15][16][17][18][19][20][21][22], irreversible changes to the resistance of nanowires [23], thermoluminescent microparticles [24][25][26][27][28][29][30][31][32], photoluminescence of ZnAl 2 O 4 [33] and core-shell quantum dots [34], phosphorescence in Tb:Y 2 SiO 5 [15], Raman spectroscopy of ceramic microparticles [35], Mossbauer parameters of a superconducting ceramic [36], modifications to thermally sensitive glass ceramics [37], photoluminescence and Raman spectroscopy of ZnO and TiO 2 nanoparticles [38,39], irreversible thermochromic behavior of Au/Ag nanorods [40] and polydiacetylene [41], and surface plasmon absorption [42][43][44].…”

Section: Introductionmentioning

confidence: 99%

Modeling ex-situ thermal impulse sensor responses to non-isothermal heating profiles

Anderson

Eilers

2019

SN Appl. Sci.

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Ex-situ thermal impulse sensing based on irreversible phase transitions has been a developing field over the past two decades. Typically, these techniques determine thermal impulses assuming a perfect isothermal heating profile, which is not the case for real-life temperature profiles in extreme environments (e.g., structural fires, explosions, gas turbines). To better understand how real-world temperature profiles influence the sensors thermal impulse determinations, we perform phenomenological modeling of a thermal impulse sensor's response to non-isothermal heating with four-key profile characteristics: finite heating rate, nonzero cooling time constant, temperature spikes, and non-isothermal heating due to the finite size of sensors. We find that in all cases, these effects result in the corresponding equivalent isothermal temperature being lower than the peak temperature, while the equivalent isothermal duration is found to either be lengthened or shortened depending on the effect of interest. These results have important implications for the interpretation of thermal impulse calculations from a wide range of ex-situ thermal impulse sensors.

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Section: Introductionmentioning

confidence: 99%

Modeling ex-situ thermal impulse sensor responses to non-isothermal heating profiles

Anderson

Eilers

2019

SN Appl. Sci.

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“…Among the oxide-based phosphor thin films, Y 2 O 3 :Eu 3? film is one of the excellent luminescent materials due to its highly luminescent efficiency [4] and it can be prepared by different methods, such as electron beam evaporation (EBE) [5], pulsed laser deposition [6], radio frequency sputtering [7] and sol gel method [8]. Numerous researchers have dedicated their efforts to analyze the microstructure and luminescent properties of the thin films [8][9][10], however, Y 2 O 3 :Eu 3?…”

Section: Introductionmentioning

confidence: 99%

Effect of annealing rate on microstructure and luminescence of Y2O3:Eu3+ deposited quartz fiber by electron beam evaporation

Chen

Miao

Jiang

et al. 2015

J Mater Sci: Mater Electron

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Y 2 O 3 :Eu 3? phosphor was deposited on quartz fibers by electron beam evaporation technology and the deposited fibers were then annealed at different rates from 1 to 10°C/min. Particle shape of the Y 2 O 3 :Eu 3? deposited on fibers was changed with the increased annealing rate and the particle size was increased significantly with the rise of annealing rate to 5°C/min. The deposited film on fibers exhibited a well cubic phase after annealing treatment and its crystallization was obviously enhanced with the increased rate. The luminescent properties of the films were markedly improved by annealing treatment and the emission intensity was increased as the rate elevated from 1 to 10°C/min because of the increased radiative transition probability of the Eu 3? ions. The CIE chromaticity coordinates results indicated that the films can display improved color purity of red emission after annealing treatment and the color purity of the annealed films was gradually improved as the increased treating rate.

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“…9) Therefore, these devices require preparing films directly on a glass or an organic substrate. 10) Several methods have been used to prepare Y 2 O 3 :Eu 3+ films such as: magnetron sputtering, 11), 12) vacuum nano-imprint, 13) microwave electron cyclotron resonance plasma, 14) sputtering, 15) excimer-laser-assisted metal organic deposition, 16) chemical bath deposition, 17) CVD, 18), 19) electrodeposition 20), 21) or pulsed laser deposition. 22), 23) However, these techniques usually require expensive and complicated equipment setup.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and photoluminescent properties of Y2O3:Eu3+ thin films prepared from F127-containing solution

Ramírez

Domínguez

Medina-Velazquez

et al. 2014

J. Ceram. Soc. Japan

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Dense and transparent Y 2 O 3 :Eu 3+ films were prepared by the solgel process and dip-coating technique from an yttrium 24 pentanedionate, europium nitrate and a methanol solution modified with F127 pluronic acid, by incorporation of acetic acid as pH modifier and acetylacetone as sol stabilizer. It was evaluated the effect of the F127/Y molar relationship (0, 0.1, 0.2, 1.0, 1.2 and 5.0) on the structure and photoluminiscent properties of the derived thin films. After 3 dipping-cycles, XRD results showed that the F127-modified films began to crystallize at 600°C into the cubic structure, and from 800°C, was found that the presence of F127 changes the preferential orientation from a ©100ª orientation, for the non-modified sample, to a ©111ª orientation, for the modified ones. M-lines spectroscopy characterization showed that the maximum thickness of the films modified and annealed at 900°C was 1937 nm (µ = 4.87 g cm ¹3, © = 1.887), compared with the 881 nm (µ = 4.94 g cm ¹3, © = 1.907) for a non-modified sample. Differential thermal analysis (DTA) and infrared spectroscopy (FTIR) were carried out to evaluate the chemical and structural evolution of the xerogel formed during the annealing process. AFM micrographs showed smooth crack-free surface (Ra = 9.2 nm) on a F127/Y = 0.2 sample. Finally, the films presented a typical Eu 3+ reddish emission at 611 nm (D o ¼ 7 F 2 ), which was analyzed as function of the F127 pluronic content and the annealing temperature.

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An analysis of Y2O3:Eu3+ thin films for thermographic phosphor applications

Cited by 30 publications

References 39 publications

Modeling ex-situ thermal impulse sensor responses to non-isothermal heating profiles

Modeling ex-situ thermal impulse sensor responses to non-isothermal heating profiles

Effect of annealing rate on microstructure and luminescence of Y2O3:Eu3+ deposited quartz fiber by electron beam evaporation

Synthesis and photoluminescent properties of Y<sub>2</sub>O<sub>3</sub>:Eu<sup>3+</sup> thin films prepared from F127-containing solution

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