Optical absorption and luminescence of Ho3+ ions in Bi2TeO5 single crystal

Földvári, I.; Baraldi, A.; Capelletti, R.; Magnani, N.; Kappers, L.A.; Watterich, A.

doi:10.1016/j.optmat.2005.11.018

Cited by 25 publications

(5 citation statements)

References 26 publications

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“…As an important RE 3+ ion for optical applications, Ho 3+ can commonly provide abundance energy‐level structures (4f 10 ) and exhibit multiband emissions rather than a monochromatic sharp emission referring to both up‐ and down‐conversion luminescence in the visible region. It is confirmed that the green‐emitting band induced by 5 F 4 + 5 S 2 → 5 I 8 transition together with the red‐emitting bands induced by 5 F 5 → 5 I 8 and 5 F 4 + 5 S 2 → 5 I 7 transitions can be simultaneously detected for many inorganic phosphor materials consisting of Y 2 O 3 :Ho 3+ , Y 3 GaO 6 :Ho 3+ , Bi 2 TeO 5 :Ho 3+ and so on . Yang et al .…”

Section: Resultsmentioning

confidence: 73%

Photoluminescence properties of aeschynite‐type LaNbTiO₆:RE³⁺ (RE = Tb, Dy, Ho) down‐converting phosphors

Lü

Yang

et al. 2013

Luminescence

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In this study, a series of LaNbTiO6:RE(3+) (RE = Tb, Dy, Ho) down-converting phosphors were synthesized using a modified sol-gel combustion method, and their photoluminescence (PL) properties were investigated as a function of activator concentration and annealing temperature. The resultant particles were characterized using X-ray diffraction, transmission electron microscopy, scanning electron microscopy, UV/Vis diffuse reflectance spectroscopy and PL spectra. The highly crystalline LaNbTiO6:RE(3+) (RE = Tb, Dy, Ho) phosphors with an average size of 200-300 nm obtained at 1100°C have an orthorhombic aeschynite-type structure and exhibit the highest luminescent intensity in our study range. The emission spectra of LaNbTiO6:RE(3+) (RE = Tb, Dy, Ho) phosphors under excitations at UV/blue sources are mainly composed of characteristic peaks arising from the f-f transitions of RE(3+), including 489 nm ((5) D4 → (7) F6) and 545 nm ((5) D4 → (7) F5) for Tb(3+), 476 and 482 nm ((4) F9/2 → (6) H15/2) and 571 nm ((4) F9/2 → (6) H13/2) for Dy(3+), and 545 nm ((5) F4 + (5) S2 → (5) I8) for Ho(3+), respectively. The luminescent mechanisms were further investigated. It can be expected that these phosphors are of intense interest and potential importance for many optical applications.

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Section: Resultsmentioning

confidence: 73%

Photoluminescence properties of aeschynite‐type LaNbTiO₆:RE³⁺ (RE = Tb, Dy, Ho) down‐converting phosphors

Lü

Yang

et al. 2013

Luminescence

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“…440-464 nm), and 3 K 8 + 5 F 2 (ca. 466-480 nm) [38,39]. The highest excitation line intensity for solely Ho 3+ doped samples was observed for the 10% doped sample.…”

Section: Resultsmentioning

confidence: 90%

Up-Converting K2Gd(PO4)(WO4):20%Yb3+,Ho3+ Phosphors for Temperature Sensing

Grigorjevaite

Katelnikovas

2023

Materials

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Inorganic luminescent materials that can be excited with NIR radiation and emit in the visible spectrum have recently gained much scientific interest. Such materials can be utilized as anti-counterfeiting pigments, luminescent thermometers, bio-imaging agents, etc. In this work, we report the synthesis and optical properties of K2Gd(PO4)(WO4):Ho3+ and K2Gd(PO4)(WO4):20%Yb3+,Ho3+ powders. The single-phase samples were prepared by the solid-state reaction method, and the Ho3+ concentration was changed from 0.5% to 10% with respect to Gd3+. It is interesting to note that under 450 nm excitation, no concentration quenching was observed in K2Gd(PO4)(WO4):Ho3+ (at least up to 10% Ho3+) samples. However, adding 20% Yb3+ has caused a gradual decrease in Ho3+ emission intensity with an increase in its concentration. It turned out that this phenomenon is caused by the increasing probability of Ho3+ → Yb3+ energy transfer when Ho3+ content increases. K2Gd(PO4)(WO4):20%Yb3+,0.5%Ho3+ sample showed exceptionally high up-conversion (UC) emission stability in the 77–500 K range. The UC emission intensity reached a maximum at ca. 350 K, and the intensity at 500 K was around four times stronger than the intensity at 77 K. Moreover, the red/green emission ratio gradually increased with increasing temperature, which could be used for temperature sensing purposes.

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“…Although Ho 3+ possesses fairly rich energy structure (4f 10 ), and there are multiple characteristic emission line corresponding to 5 F 4 + 5 S 2 / 5 I 8 transitions (green light), 5 F 5 / 5 I 8 and 5 F 4 + 5 S 2 / 5 I 7 transitions (red light) could be measured. [31][32][33] While there is few reports concerning single green emission of Ho 3+ doped phosphors materials so far. Under blue light LDs and LEDs pumping, LaNbTiO 6 :Ho 3+ phosphors could produce effective homogeneous green emission, and have potential application value in the eld of at panel display and trichromatic phosphor.…”

Section: Photoluminescence Propertiesmentioning

confidence: 99%

Energy transfer from Bi³⁺ to Ho³⁺ triggers brilliant single green light emission in LaNbTiO₆:Ho³⁺, Bi³⁺ phosphors

Zhang

Zhou

Zhou³

et al. 2014

RSC Adv.

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Optical absorption and luminescence of Ho3+ ions in Bi2TeO5 single crystal

Cited by 25 publications

References 26 publications

Photoluminescence properties of aeschynite‐type LaNbTiO₆:RE³⁺ (RE = Tb, Dy, Ho) down‐converting phosphors

Photoluminescence properties of aeschynite‐type LaNbTiO₆:RE³⁺ (RE = Tb, Dy, Ho) down‐converting phosphors

Up-Converting K2Gd(PO4)(WO4):20%Yb3+,Ho3+ Phosphors for Temperature Sensing

Energy transfer from Bi³⁺ to Ho³⁺ triggers brilliant single green light emission in LaNbTiO₆:Ho³⁺, Bi³⁺ phosphors

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Optical absorption and luminescence of Ho3+ ions in Bi2TeO5 single crystal

Cited by 25 publications

References 26 publications

Photoluminescence properties of aeschynite‐type LaNbTiO6:RE3+ (RE = Tb, Dy, Ho) down‐converting phosphors

Photoluminescence properties of aeschynite‐type LaNbTiO6:RE3+ (RE = Tb, Dy, Ho) down‐converting phosphors

Up-Converting K2Gd(PO4)(WO4):20%Yb3+,Ho3+ Phosphors for Temperature Sensing

Energy transfer from Bi3+ to Ho3+ triggers brilliant single green light emission in LaNbTiO6:Ho3+, Bi3+ phosphors

Contact Info

Product

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Photoluminescence properties of aeschynite‐type LaNbTiO₆:RE³⁺ (RE = Tb, Dy, Ho) down‐converting phosphors

Photoluminescence properties of aeschynite‐type LaNbTiO₆:RE³⁺ (RE = Tb, Dy, Ho) down‐converting phosphors

Energy transfer from Bi³⁺ to Ho³⁺ triggers brilliant single green light emission in LaNbTiO₆:Ho³⁺, Bi³⁺ phosphors