Energy transfer induced color-tunable emissions from Ba2Gd5B5O17:Ce3+/Tb3+ borate phosphors for white LEDs

Vijayakumar, R.; Devakumar, Balaji; Huang, Xiaoyong

doi:10.1016/j.jlumin.2020.117685

Cited by 22 publications

(2 citation statements)

References 76 publications

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“…On the other hand, these phosphors doped with Tb 3+ ions have a distinct disadvantage. Because Tb 3+ ions have spin-forbidden 4f → 4f transitions, their near-UV absorption spectra are very weak, and their poor absorption efficiency and luminous intensity limit their practical use in white LEDs ( Chen and Wang, 2019 ; Vijayakumar et al, 2021 ). Hence, green phosphors containing just Tb 3+ ions are typically incompatible with white LEDs ( Yan et al, 2019 ).…”

Section: Photoluminescence Propertiesmentioning

confidence: 99%

The developments of cyan emitting phosphors to fulfill the cyan emission gap of white-LEDs

Khan,

Chen

et al. 2023

Front. Chem.

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Future generations of solid-state lighting (SSL) will prioritize the development of innovative luminescent materials with superior characteristics. The phosphors converted into white light-emitting diodes (white LEDs) often have a blue-green cavity. Cyan-emitting phosphor fills the spectral gap and produces “full-visible-spectrum lighting.” Full-visible spectrum lighting is beneficial for several purposes, such as light therapy, plant growth, and promoting an active and healthy lifestyle. The design of cyan garnet-type phosphors, like Ca2LuHf2Al3O12 (CLHAO), has recently been the subject of interest. This review study reports a useful cyan-emitting phosphor based on CLHAO composition with a garnet structure to have a cyan-to-green emitting color with good energy transfer. It could be employed as cyan filler in warm-white LED manufacturing. Due to its stability, ability to dope with various ions suitable for their desired qualities, and ease of synthesis, this garnet-like compound is a great host material for rare-earth ions. The development of CLHAO cyan-emitting phosphors has exceptionally high luminescence, resulting in high CRI and warm-white LEDs, making them a viable desire for LED manufacturing. The development of CLHAO cyan-emitting phosphors with diverse synthesis techniques, along with their properties and applications in white LEDs, are extensively covered in this review paper.

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Section: Photoluminescence Propertiesmentioning

confidence: 99%

The developments of cyan emitting phosphors to fulfill the cyan emission gap of white-LEDs

Khan,

Chen

et al. 2023

Front. Chem.

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“…White light-emitting diodes (WLEDs) have been attracting much attention in the past decades due to their high luminescence efficiency, long lifetime, small size, and environmental protection. − Classical WLEDs are generally fabricated by a blue (InGa)N LED chip combined with a yellow-emitting yttrium aluminum garnet (YAG:Ce) phosphor. − However, the limitations of this white LED are its high correlated color temperature (CCT > 5000 K) and low color rendering index (CRI < 75) owing to the lack of a red light, resulting in an uncomfortable cold white light. − To achieve high quality warm white light, a classical approach was to match an (N)UV LED chip with red, blue, and green (RBG) phosphors. − Nevertheless, among the tricolor (RBG) phosphors, the number of commercial blue phosphors was quite limited . At present, the common commercial blue phosphors are BaMgAl 10 O 17 :Eu 2+ and Sr 3 MgSi 2 O 8 :Eu 2+ , which show limited temperature stability due to the occurrence of nonradiative transitions at high temperatures, although they exhibit high fluorescence quantum efficiency at room temperature. ,− Therefore, the development of novel blue phosphors with high luminescence and thermal stability is a key challenge for applications in WLEDs, especially under high power conditions for laser LEDs. − …”

Section: Introductionmentioning

confidence: 99%

High-Quantum-Efficiency Blue Phosphors with Superior Thermal Stability Derived from Eu³⁺-Doped Faujasite Y Zeolite

Zhou,

Feng,

Yin

et al. 2023

Inorg. Chem.

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Blue phosphors of high efficiency and superior thermal stability constitute the critical component for achieving high-quality white light-emitting diodes (WLEDs). Herein, we report a highly efficient blue-emitting phosphor with superior thermal stability by heating Eu 3+ -doped Faujasite Y zeolite under a reducing atmosphere. The intensity and peak value of the phosphor are highly dependent on calcination temperature, and the intensity of PLE and PL spectra reaches a maximum at 1100 °C. Under the excitation of 360 nm, the phosphor shows a high quantum efficiency (90%) and thermal stability (the emission intensity at 423 K is about 125% of that at room temperature). WLEDs fabricated using this blue phosphor, a yellow Eu 2+ -SOD phosphor, and a commercially available red Sr 2 Si 5 N 8 :Eu 2+ phosphor exhibit an excellent optical performance with a correlated color temperature of 4359 K and a color rendering index of 97. This work provides a new strategy for the synthesis of phosphors with high thermal stability and luminous efficiency.

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Manganese activated narrowband red-emitting Cs2KInF6:Mn4+ phosphor with high colour purity for backlight display

Liu

Cheng

Yang

et al. 2022

Ceramics International

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Energy transfer induced color-tunable emissions from Ba2Gd5B5O17:Ce3+/Tb3+ borate phosphors for white LEDs

Cited by 22 publications

References 76 publications

The developments of cyan emitting phosphors to fulfill the cyan emission gap of white-LEDs

The developments of cyan emitting phosphors to fulfill the cyan emission gap of white-LEDs

High-Quantum-Efficiency Blue Phosphors with Superior Thermal Stability Derived from Eu³⁺-Doped Faujasite Y Zeolite

Manganese activated narrowband red-emitting Cs2KInF6:Mn4+ phosphor with high colour purity for backlight display

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Energy transfer induced color-tunable emissions from Ba2Gd5B5O17:Ce3+/Tb3+ borate phosphors for white LEDs

Cited by 22 publications

References 76 publications

The developments of cyan emitting phosphors to fulfill the cyan emission gap of white-LEDs

The developments of cyan emitting phosphors to fulfill the cyan emission gap of white-LEDs

High-Quantum-Efficiency Blue Phosphors with Superior Thermal Stability Derived from Eu3+-Doped Faujasite Y Zeolite

Manganese activated narrowband red-emitting Cs2KInF6:Mn4+ phosphor with high colour purity for backlight display

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Product

Resources

About

High-Quantum-Efficiency Blue Phosphors with Superior Thermal Stability Derived from Eu³⁺-Doped Faujasite Y Zeolite