RbBaPO<sub>4</sub>:Eu<sup>2+</sup>: a new alternative blue-emitting phosphor for UV-based white light-emitting diodes

Song, Hee Jo; Yim, Dong Kyun; Roh, Hee Suk; Cho, In Sun; Kim, Seungjoo; Jin, Yun; Shim, Hyun Woo; Kim, Dong Wan; Hong, Kug Sun

doi:10.1039/c2tc00162d

Cited by 97 publications

(51 citation statements)

References 20 publications

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“…3e) tend to have wide bandgaps >4 eV) and moderate Debye temperatures (≈500 K) signifying there is potential for continued development in this space. In fact, a significant number of rare-earth substituted phosphates have been recently reported such as Na 3 Sc 2 (PO 4 ) 3 :Eu 2+ 15 , BaRbPO 4 :Eu 2+ 34 , and LiSrPO 4 :Eu 2+ 35 , supporting the sorting diagram’s suggestion.…”

Section: Resultsmentioning

confidence: 54%

Identifying an efficient, thermally robust inorganic phosphor host via machine learning

Zhuo¹,

Tehrani²,

Oliynyk³

et al. 2018

Nat Commun

275

178

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Rare-earth substituted inorganic phosphors are critical for solid state lighting. New phosphors are traditionally identified through chemical intuition or trial and error synthesis, inhibiting the discovery of potential high-performance materials. Here, we merge a support vector machine regression model to predict a phosphor host crystal structure’s Debye temperature, which is a proxy for photoluminescent quantum yield, with high-throughput density functional theory calculations to evaluate the band gap. This platform allows the identification of phosphors that may have otherwise been overlooked. Among the compounds with the highest Debye temperature and largest band gap, NaBaB9O15 shows outstanding potential. Following its synthesis and structural characterization, the structural rigidity is confirmed to stem from a unique corner sharing [B3O7]5– polyanionic backbone. Substituting this material with Eu2+ yields UV excitation bands and a narrow violet emission at 416 nm with a full-width at half-maximum of 34.5 nm. More importantly, NaBaB9O15:Eu2+ possesses a quantum yield of 95% and excellent thermal stability.

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Section: Resultsmentioning

confidence: 54%

Identifying an efficient, thermally robust inorganic phosphor host via machine learning

Zhuo¹,

Tehrani²,

Oliynyk³

et al. 2018

Nat Commun

275

178

View full text Add to dashboard Cite

show abstract

“…Strong ligand-activator bonding interactions cause low energy differences between 4f 6 5d 1 and 4f 7 states; thus, a red shift of the Eu 2+ emission band is generated [4][5][6][7]. A series of Eu 2+ -doped phosphors, such as K 2 Ba 7 Si 16 O 40 :Eu 2+ [8], RbBaPO 4 :Eu 2+ [9], and Ba 3 Y(PO 4 ) 3 :Eu 2+ , have been investigated [10].…”

Section: Introductionmentioning

confidence: 99%

A novel blue luminescent material Sr 6 Ca 4 (PO 4 ) 6 F 2 :Eu 2+

Chen

Zhou

et al. 2015

Materials Research Bulletin

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“…Phosphor‐converted w‐LEDs (pc w‐LEDs) are proving to be the outstanding benefits of a high‐luminescence virtue, a low energy depletion, and low pollution, and a long service life period. They are widely studied and used in many fields including illumination, flashlight, and so on . Phosphors are pivotal components in the pc w‐LEDs which switch monochromatic light from blue or near‐ultraviolet (n‐UV) chips into other colors, then combine all the resulting into white light .…”

Section: Introductionmentioning

confidence: 99%

Warm white light emitting from single composition SrGa₁₂O₁₉:Dy³⁺ phosphors for AC‐LED

et al. 2019

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Making illumination light sources become comfortable to the human eye is a long‐term effort, which justifies the current research on warm white‐light‐emitting diodes (w‐LEDs). In this work, a novel phosphor for w‐LEDs, namely SrGa12O19: Dy3+(SGO: Dy3+), with a low‐color temperature (CT) was designed and synthesized. The crystal structure, the luminescence properties, the thermoluminescence properties and the stability of SGO: Dy3+ were investigated. We demonstrate outstanding luminescent characteristics and excellent stabilities. The intensity of emission light keep remained when excited by a flickering light source with a chopping speed or off‐time of a few seconds, which indicates that the SGO: Dy3+ phosphor has anti‐flicker properties that will be useful for potential applications, as LEDs driven by alternating current (AC‐LED). The chromaticity coordinates and the correlated color temperature (CCT) of SGO: Dy3+ phosphors with different Dy3+ concentrations are close with an optimal doping at 4.00 mol% Dy3+ for chromaticity coordinate (0.4269, 0.4348) and a lowest CCT of 3361 K. The perfect weatherability of this phosphor was also confirmed since the phosphorescence intensity and the color were stable at high temperature and in a high humidity environment. The performance obtained shows that SGO: Dy3+ is a suitable candidate for illumination sources that are beneficial to human health.

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RbBaPO₄:Eu²⁺: a new alternative blue-emitting phosphor for UV-based white light-emitting diodes

Cited by 97 publications

References 20 publications

Identifying an efficient, thermally robust inorganic phosphor host via machine learning

Identifying an efficient, thermally robust inorganic phosphor host via machine learning

A novel blue luminescent material Sr 6 Ca 4 (PO 4 ) 6 F 2 :Eu 2+

Warm white light emitting from single composition SrGa₁₂O₁₉:Dy³⁺ phosphors for AC‐LED

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RbBaPO4:Eu2+: a new alternative blue-emitting phosphor for UV-based white light-emitting diodes

Cited by 97 publications

References 20 publications

Identifying an efficient, thermally robust inorganic phosphor host via machine learning

Identifying an efficient, thermally robust inorganic phosphor host via machine learning

A novel blue luminescent material Sr 6 Ca 4 (PO 4 ) 6 F 2 :Eu 2+

Warm white light emitting from single composition SrGa12O19:Dy3+ phosphors for AC‐LED

Contact Info

Product

Resources

About

RbBaPO₄:Eu²⁺: a new alternative blue-emitting phosphor for UV-based white light-emitting diodes

Warm white light emitting from single composition SrGa₁₂O₁₉:Dy³⁺ phosphors for AC‐LED