X-ray photoelectron spectroscopy and luminescent properties of Y2O3:Bi3+ phosphor

Jafer, R.; Coetsee, E.; Yousif, A.; Kroon, R.E.; Ntwaeaborwa, O.M.; Swart, H.C.

doi:10.1016/j.apsusc.2015.01.009

Cited by 47 publications

(22 citation statements)

References 20 publications

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“…This broad band is composed of three bands centered at 360, 410 and 495 nm. It has been reported by the authors [10] that the two first bands and the third one are attributed to the Bi 3 þ ion that occupies the two different sites in the Y 2 O 3 structure. For the film that was fabricated by the RF magnetron technique there is only one site for the Bi 3 þ ions to be occupied as discussed earlier.…”

Section: Photoluminescence (Pl) Studymentioning

confidence: 95%

“…4. Previous studies done by the authors [10] showed that the Bi 3 þ ion has a 6s 2 electron configuration. The emission and absorption spectra are therefore expected to be broad bands.…”

Section: Photoluminescence (Pl) Studymentioning

confidence: 97%

“…This research study therefore involves investigations on the Bi 3 þ ion in order to increase the energy transfer towards the Yb 3 þ ion in the Y 2 O 3 ;Bi 3 þ , Yb 3 þ phosphor material for possible application as a down-conversion coating for Si solar cells. The Y 2 O 3 :Bi 3 þ phosphor powder with a high (3%) and low (0.2%) Bi concentration was successfully prepared by the combustion technique [10]. The high-resolution X-ray photoelectron spectroscopy results for the high Bi concentration sample clearly indicated the Bi 4f peaks inside the Y 3d energy range.…”

Section: Introductionmentioning

confidence: 98%

“…The morphological, structural and optical properties of the Y 2 O 3 :Bi 3 þ thin films, have been investigated. The investigation was done to identify the best thin film preparation technique that can provide more or less the same results and properties as the Y 2 O 3 :Bi 3 þ phosphor powder [10]. In a previous study [17] we have successfully obtained luminescent Y 2 O 3 :Bi 3 thin films with the spin coating technique.…”

Section: Introductionmentioning

confidence: 99%

“…More studies on different production methods, especially thin films is therefore needed. We therefore used our obtained knowledge in previous studies on the preparation of the powders [10] and thin films, both with the PLD [16] and spin coating [17] technique to compare the spin coating films with newly obtained RF sputtered thin films after optimizing some of the parameters used in the other techniques. Herein, the Y 2 O 3 :Bi 3 þ thin films have been fabricated by using two methods, the RF magnetron sputtering and sol-gel spin coating techniques.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Comparison of Y2O3:Bi3+ phosphor thin films fabricated by the spin coating and radio frequency magnetron techniques

Jafer

Yousif

Kumar

et al. 2016

Physica B: Condensed Matter

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Section: Photoluminescence (Pl) Studymentioning

confidence: 95%

“…4. Previous studies done by the authors [10] showed that the Bi 3 þ ion has a 6s 2 electron configuration. The emission and absorption spectra are therefore expected to be broad bands.…”

Section: Photoluminescence (Pl) Studymentioning

confidence: 97%

Section: Introductionmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Comparison of Y2O3:Bi3+ phosphor thin films fabricated by the spin coating and radio frequency magnetron techniques

Jafer

Yousif

Kumar

et al. 2016

Physica B: Condensed Matter

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Isolated Co‐Ti‐Y Trimetallic Synergistic Catalysis Based on Apparent Anti‐Electronegative Polarization

Qiu

Gates

et al. 2022

Adv Funct Materials

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Rational design of multimetallic synergistic catalysis is a grand challenge in the field of green catalysis because synergistic mechanisms are poorly understood. Here, by exploiting a unique apparent anti-electronegativity polarization in cobalt-titanium-yttrium trimetallic synergy, a unified methodology is demonstrated to activate oxygen and nitrogen. The new trimetallic synergistic catalyst achieves direct solvent-free aerobic oxidation of cyclohexane to adipic acid and direct nitrogen oxidation of acetonitrile to guanidine. The delocalization of d-orbitals and activation of inner electrons are the linchpins of catalytic performance, contributing to 90.87% selectivity for ketone-alcohol oil and adipic-acid and 89.30% selectivity for guanidine, respectively. The experiments and calculations demonstrate that the prodigious electrophilicity of the yttrium site overcomes the homeostasis of valence shell structures in the isolated cobalt and titanium sites. The valence electrons of this synergistic system become enriched with anti-electronegative polarization and concomitant high charge transfer efficiency. In response to urging sustainable chemistry, the results corroborate that the activation strategies and mechanisms of molecular oxygen and nitrogen can be moderated and unified when multimetallic synergy is considered.

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Tailoring the Switching Dynamics in Yttrium Oxide‐Based RRAM Devices by Oxygen Engineering: From Digital to Multi‐Level Quantization toward Analog Switching

Petzold

Piros

Eilhardt

et al. 2020

Adv Elect Materials

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Program under grant no. 805359-FOXON are gratefully acknowledged. E.M. also acknowledges the funding from the WAKeMeUP project as well as the support from the Ministerio de Ciencia, Innovación y Universidades, Spain (TEC2017-84321-C4-4-R and PCI2018-093107). Thanks to Katrin Walter for carrying out the UV/vis measurements and to Seyma Topcu for obtaining the current-voltage curves. S.P. and E.P. have equally contributed to the paper. Open access funding enabled and organized by Projekt DEAL.

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X-ray photoelectron spectroscopy and luminescent properties of Y2O3:Bi3+ phosphor

Cited by 47 publications

References 20 publications

Comparison of Y2O3:Bi3+ phosphor thin films fabricated by the spin coating and radio frequency magnetron techniques

Comparison of Y2O3:Bi3+ phosphor thin films fabricated by the spin coating and radio frequency magnetron techniques

Isolated Co‐Ti‐Y Trimetallic Synergistic Catalysis Based on Apparent Anti‐Electronegative Polarization

Tailoring the Switching Dynamics in Yttrium Oxide‐Based RRAM Devices by Oxygen Engineering: From Digital to Multi‐Level Quantization toward Analog Switching

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