A novel high color purity blue-emitting phosphor: CaBi2B2O7:Tm3+

Li, Jiangong; Yan, Huifang; Yan, Fengmei

doi:10.1016/j.mseb.2016.03.004

Cited by 39 publications

(10 citation statements)

References 22 publications

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“…The excitation and emission spectra of the SIP:Tm 3+ /Dy 3+ phosphors with different doping concentrations were measured to evaluate the photoluminescent properties. Upon monitoring of the characteristic emission of Tm 3+ at 457 nm, a weaker group of bands assigned to 3 H 6 → 3 P j ( j = 2, 1, 0) transitions and an obvious peak located at 357 nm pertaining to the 3 H 6 → 1 D 2 transition can be observed (Figure a) . Under 357 nm excitation, the PL spectra display an intense peak at 457 nm and a considerably weaker peak at 481 nm.…”

Section: Resultsmentioning

confidence: 97%

“…Upon monitoring of the characteristic emission of Tm 3+ at 457 nm, a weaker group of bands assigned to 3 H 6 → 3 P j (j = 2, 1, 0) transitions and an obvious peak located at 357 nm pertaining to the 3 H 6 → 1 D 2 transition can be observed (Figure 6a). 60 Under 357 nm excitation, the PL spectra display an intense peak at 457 nm and a considerably weaker peak at 481 nm. It is clear that the intensity of Tm 3+ emission first ascends with increasing Tm 3+ dopant concentration x, and after x = 0.02 reaches the maximum value, a rapid decrease can be viewed because of the concentration quenching caused by the nonradiative transition (Figure 6b).…”

Section: Resultsmentioning

confidence: 99%

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Daylight-White-Emitting and Abnormal Thermal Antiquenching Phosphors Based on a Layered Host SrIn₂(P₂O₇)₂

et al. 2021

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Single-phase white-emission phosphors possess a judicious usage potential in phosphor-converted white-light-emitting diodes (WLEDs). Recently, numerous efforts have been made toward the development of new patterns of white-emitting phosphors that achieve excellent quantum yield, superior thermal stability, and applaudable cost effectiveness of WLEDs. Finding suitable single-component white phosphor hosts to provide an ideal local environment for activators remains urgent. Inspired by the original discovery of the promising host MgIn 2 (P 2 O 7 ) 2 (MIP) and its structural dependence on alkali-metal cations, we synthesized a brand-new phosphor host, SrIn 2 (P 2 O 7 ) 2 (SIP), via the traditional solid-state reaction. Its crystal structure was determined using an ab initio analysis and the Rietveld method. It belongs to a monoclinic unit cell with the space group C2/c. Besides, SIP exhibits a special layered three-dimensional framework in which the monolayer [SrO 10 ] ∞ was surrounded by a bilayer [In 2 P 4 O 14 ] ∞ made of the InO 6 octahedra and P 2 O 7 groups. A series of pure SIP:Tm 3+ ,Dy 3+ phosphors with tunable blue−white−yellow emission were prepared by adjusting the dopant concentration and utilizing the Tm 3+ −Dy 3+ energy transfer. The daylight-white-emitting phosphor SIP:0.01Tm 3+ ,0.04Dy 3+ (the correlated color temperature is 4448 K) exhibits an abnormal thermal antiquenching property, and the emission intensity of 423 K reaches 103.7% of the initial value at 300 K. On the basis of the temperature-dependent lattice evolution and microenvironment analysis, the reduction of β and lattice distortion can lead to lower asymmetry of the activators and benefit the compensation of trapped-electron thermal activation. In this work, an integration study was carried out on the crystal structure of the new matrix, the occupation of the luminescent center, the interaction of different activators in the host, and the distortion degree of the local structure for the activators, which is of great practical sense for producing a novel single-matrix white phosphor possessing superior thermal endurance for UV-light-stimulated WLEDs.

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Section: Resultsmentioning

confidence: 97%

Section: Resultsmentioning

confidence: 99%

Daylight-White-Emitting and Abnormal Thermal Antiquenching Phosphors Based on a Layered Host SrIn₂(P₂O₇)₂

et al. 2021

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“…Monitored by the characteristic emission of Tm 3+ at 458 nm, a predominant peak at 355 nm corresponding to the f−f transition 3 H 6 → 1 D 2 was observed. 25 Under the excitation of 355 nm radiation, the emission spectrum exhibits a strong peak at 458 nm ( 1 D 2 → 3 F 4 ) and a weaker one at 481 nm ( 1 G 4 → 3 H 6 ), both of which belong to the characteristic emissions of Tm 3+ ions that originated from f−f inner shell transitions. Figure 3b shows the curve of emission peak intensity versus the Tm 3+ ion doping concentration.…”

Section: Resultsmentioning

confidence: 98%

“…The excitation and emission spectra of representative phosphor MgIn 2 P 4 O 14 :Tm 0.04 are shown in Figure a. Monitored by the characteristic emission of Tm 3+ at 458 nm, a predominant peak at 355 nm corresponding to the f – f transition 3 H 6 → 1 D 2 was observed . Under the excitation of 355 nm radiation, the emission spectrum exhibits a strong peak at 458 nm ( 1 D 2 → 3 F 4 ) and a weaker one at 481 nm ( 1 G 4 → 3 H 6 ), both of which belong to the characteristic emissions of Tm 3+ ions that originated from f – f inner shell transitions.…”

Section: Resultsmentioning

confidence: 99%

Layered Crystal Structure, Color-Tunable Photoluminescence, and Excellent Thermal Stability of MgIn₂P₄O₁₄ Phosphate-Based Phosphors

et al. 2017

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Single-component white phosphors stand a good chance to serve in the next-generation high-power white light-emitting diodes. Because of low thermal stability and containing lanthanide ions with reduced valence state, most of reported phosphors usually suffer unstable color of lighting for practical packaging and comparably complex synthetic processes. In this work, we present a type of novel color-tunable blue-white-yellow-emitting MgInPO:Tm/Dy phosphor with high thermal stability, which can be easily fabricated in air. Under UV excitation, the MgInPO:TmDy white phosphor exhibits negligible thermal-quenching behavior, with a 99.5% intensity retention at 150 °C, relative to its initial value at room temperature. The phosphor host MgInPO was synthesized and reported for the first time. MgInPO crystallizes in the space group of C2/c (No. 15) with a novel layered structure built of alternate anionic and cationic layers. Its disordering structure, with Mg and In atoms co-occupying the same site, is believed to facilitate the energy transfer between rare-earth ions and benefit by sustaining the luminescence with increasing temperature. The measured absolute quantum yields of MgInPO:Dy, MgInPO:TmDy, and MgInPO:TmDy phosphors under the excitation of 351 nm ultraviolet radiation are 70.50%, 53.24%, and 52.31%, respectively. Present work indicates that the novel layered MgInPO is a promising candidate as a single-component white phosphor host with an excellent thermal stability for near-UV-excited white-light-emitting diodes (wLEDs).

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“…As we can see, the O 2-→Tm 3+ charge transfer band is 250-300 nm[11]. The 4f-4f transition of 3 H 6 → 1 D 2 of Tm 3+ lead to the 358 nm peak[12]. The electronic dipole transition of 1 G 4 → 3 H 6 of Tm 3+ make a single emission band at 452 nm[13].…”

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confidence: 81%

Research on a new Tm3+-doped NaCa3Bi(PO4)3F blue-emitting phosphor for w-LEDs

Zheng²,

Deng³

2023

International Conference on Optical Technology, Semiconductor Materials, and Devices (OTSMD 2022)

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Tm 3+ doped NaCa 3 Bi(PO 4 ) 3 F blue-emitting phosphors have been synthesized following a conventional high-temperature solid-state reaction. Their phase purity, optical characteristics were systematically studied. The results show that the optimal doping concentration of Tm 3+ was 0.05. Electric multipole interaction was proposed as the mechanism for concentration quenching in NaCa 3 Bi(PO 4 ) 3 F materials. Furthermore, the NaCa 3 Bi(PO 4 ) 3 F:0.05Tm 3+ fluoresces blue with color coordinates (0.1592, 0.0346). The results indicated that NaCa 3 Bi(PO 4 ) 3 F:Tm 3+ phosphors could participate in fabricating the w-LEDs as the blue component.

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A novel high color purity blue-emitting phosphor: CaBi2B2O7:Tm3+

Cited by 39 publications

References 22 publications

Daylight-White-Emitting and Abnormal Thermal Antiquenching Phosphors Based on a Layered Host SrIn₂(P₂O₇)₂

Daylight-White-Emitting and Abnormal Thermal Antiquenching Phosphors Based on a Layered Host SrIn₂(P₂O₇)₂

Layered Crystal Structure, Color-Tunable Photoluminescence, and Excellent Thermal Stability of MgIn₂P₄O₁₄ Phosphate-Based Phosphors

Research on a new Tm3+-doped NaCa3Bi(PO4)3F blue-emitting phosphor for w-LEDs

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A novel high color purity blue-emitting phosphor: CaBi2B2O7:Tm3+

Cited by 39 publications

References 22 publications

Daylight-White-Emitting and Abnormal Thermal Antiquenching Phosphors Based on a Layered Host SrIn2(P2O7)2

Daylight-White-Emitting and Abnormal Thermal Antiquenching Phosphors Based on a Layered Host SrIn2(P2O7)2

Layered Crystal Structure, Color-Tunable Photoluminescence, and Excellent Thermal Stability of MgIn2P4O14 Phosphate-Based Phosphors

Research on a new Tm3+-doped NaCa3Bi(PO4)3F blue-emitting phosphor for w-LEDs

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Daylight-White-Emitting and Abnormal Thermal Antiquenching Phosphors Based on a Layered Host SrIn₂(P₂O₇)₂

Daylight-White-Emitting and Abnormal Thermal Antiquenching Phosphors Based on a Layered Host SrIn₂(P₂O₇)₂

Layered Crystal Structure, Color-Tunable Photoluminescence, and Excellent Thermal Stability of MgIn₂P₄O₁₄ Phosphate-Based Phosphors