Nanopowders of YAl3(BO3)4 doped by Nd, Yb and Cr obtained by sol–gel method: Synthesis, structure and luminescence properties

Szysiak, A.; Lipińska, L.; Ryba‐Romanowski, W.; Solarz, P.; Diduszko, R.; Pajączkowska, A.

doi:10.1016/j.materresbull.2009.08.004

Cited by 13 publications

(4 citation statements)

References 13 publications

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“…Low temperature emission spectra of YAl 3 (BO 3 ) 4 :Cr 3+ are dominated by the 2 E -4 A 2 emission band whereas the 4 T 2 -4 A 2 band cannot be observed. [27][28][29] Although the emission intensity of 4 T 2 -4 A 2 increases at room temperature, the spectrum is still dominated by the 2 E -4 A 2 band. 30 When Y 3+ ions are replaced by Gd 3+ the 4 T 2 -4 A 2 emission intensity starts to dominate over the 2 E -4 A 2 band.…”

Section: Introductionmentioning

confidence: 99%

A Cr³⁺ luminescence based ratiometric optical laser power meter

et al. 2022

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Section: Introductionmentioning

confidence: 99%

A Cr³⁺ luminescence based ratiometric optical laser power meter

et al. 2022

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“…In the first step, yttrium oxide was dissolved in deionized water, slightly diluted in hot ultrapure nitric acid and then subjected to a triple recrystallization process. Subsequently, a solution of boric acid with d-sorbitol which act as a complexing agents for boron ions was prepared in molar ratio 2:3 to citric acid, and continuously stirred for 1 h. Due to the fact that boric acid evaporates during the synthesis and annealing processes, obtaining materials with high phase purity is often straitened, because randomly formed, non-stoichiometric ion ratios could lead to additional phases formation 52 – 56 . Therefore, in order to compensate the loss of boric acid, an appropriate excess ratios of both Al 3+ and B 3+ ions were calculated basing on the percentage of the additional YBO 3 received from X-ray powder diffraction patterns.…”

Section: Methodsmentioning

confidence: 99%

Optical heating and luminescence thermometry combined in a Cr3+-doped YAl3(BO3)4

Elżbieciak-Piecka

Marciniak

2022

Sci Rep

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The possibility of optical heating with simultaneous control of the generated light within a single phosphor is particularly attractive from the perspective of multiple applications. This motivates the search for new solutions to enable efficient optical heating. In response to these requirements, based on the high absorption cross-section of Cr3+ ions, the optical heater based on YAl3(BO3)4:Cr3+ exhibiting highly efficient heating is developed. At the same time, the emission intensity ratio of 2E(g) → 4A2(g) and 4T2(g) → 4A2(g) of Cr3+ bands, thanks to the monotonic temperature dependence, enables remote temperature readout of the phosphor using luminescence thermometry technique. The combination of these two functionalities within a single phosphor makes YAl3(BO3)4:Cr3+ a promising, self thermally controlled photothermal agent.

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“…31 Further studies have been performed on magnetic properties, luminescent features, crystal-field parameters, and luminescent thermal behaviors of YAB:Cr 3+ . [32][33][34][35][36][37][38][39] YAB:Cr 3+ crystals or microcrystalline powders show high luminescent brightness and strong temperature-dependence of decay time, making them particularly promising for applications as thermographic phosphors. 38 However, luminescent thermal behaviors of YAB:Cr 3+ still deserve further studies.…”

Section: Introductionmentioning

confidence: 99%

Far‐red‐emitting YAl₃(BO₃)₄:Cr³⁺ phosphors with excellent thermal stability and high luminescent yield for plant growth LEDs

Shi

Yao

et al. 2021

J. Am. Ceram. Soc.

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Phosphors-converted LEDs (pc-LEDs) are excellent artificial light sources for indoor plant cultivation, in which the far-red-emitting component (700−780 nm) plays an important role in regulating the photomorphogenesis of plants. Accordingly, highly efficient and thermally stable far-red-emitting phosphors are indispensable for developing high-performance plant cultivation pc-LEDs. Herein, far-red-emitting YAl 3 (BO 3 ) 4 :Cr 3+ (YAB:Cr 3+ ) phosphors were synthesized by solid-state reaction, and their photoluminescence characteristics, thermal quenching, quantum yield (QY), and application in pc-LEDs were systematically investigated. The YAB:Cr 3+ phosphor has an intense broadband absorption to the blue light, simultaneously exhibiting the sharp-line 2 E emission and the broadband 4 T 2 emission of Cr 3+ with a QY of ~86.7%.The far-red broadband emissions of YAB:Cr 3+ centered at ~735 nm show a high resemblance to the active-state (P FR ) absorption of plant phytochrome. Moreover, the YAB:Cr 3+ phosphor shows the thermally enhanced luminescence at temperatures of 303−393 K and the near-zero thermal quenching up to 423 K. The anomalous thermal enhancement is attributed to the temperature-dependent repopulation between 2 E and 4 T 2 states. Finally, a pc-LED device was fabricated with the YAB:Cr 3+ phosphor and blue chip, exhibiting the light out power of ~50.6 mW and energy conversion efficiency of ~17.4% at 100 mA drive current, respectively. The exceptional PL features including suitable excitation/emission wavelengths, suppressed thermal quenching and high QY make YAB:Cr 3+ phosphors very promising for applications in plant growth pc-LEDs.

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Nanopowders of YAl3(BO3)4 doped by Nd, Yb and Cr obtained by sol–gel method: Synthesis, structure and luminescence properties

Cited by 13 publications

References 13 publications

A Cr³⁺ luminescence based ratiometric optical laser power meter

A Cr³⁺ luminescence based ratiometric optical laser power meter

Optical heating and luminescence thermometry combined in a Cr3+-doped YAl3(BO3)4

Far‐red‐emitting YAl₃(BO₃)₄:Cr³⁺ phosphors with excellent thermal stability and high luminescent yield for plant growth LEDs

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Nanopowders of YAl3(BO3)4 doped by Nd, Yb and Cr obtained by sol–gel method: Synthesis, structure and luminescence properties

Cited by 13 publications

References 13 publications

A Cr3+ luminescence based ratiometric optical laser power meter

A Cr3+ luminescence based ratiometric optical laser power meter

Optical heating and luminescence thermometry combined in a Cr3+-doped YAl3(BO3)4

Far‐red‐emitting YAl3(BO3)4:Cr3+ phosphors with excellent thermal stability and high luminescent yield for plant growth LEDs

Contact Info

Product

Resources

About

A Cr³⁺ luminescence based ratiometric optical laser power meter

A Cr³⁺ luminescence based ratiometric optical laser power meter

Far‐red‐emitting YAl₃(BO₃)₄:Cr³⁺ phosphors with excellent thermal stability and high luminescent yield for plant growth LEDs