High thermal stability of green-emitting phosphor NaBaB9O15: Tb3+ via energy compensation

Li, Qinling; Chen, Chao; Qiao, Yingjie; Yu, Bin; Shen, Bingqing; Zhang, Yuepin

doi:10.1016/j.jallcom.2021.163131

Cited by 15 publications

(2 citation statements)

References 41 publications

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“…Such a wide temperature range of thermal stability from cryogenic temperature to elevated temperature has never been reported in luminescent Mn complexes, and is even extremely rare in all kinds of organic and inorganic luminescent materials so far. [4,[46][47][48][49][50][51][52][53][54][55] As can be seen in Figure 2e, the integrated intensity remains identical from 4 up to 574 K. A mere 4% drop is observed if temperature is further increased to 623 K. Integrated intensity in a heating and cooling cycle is displayed in Figure S8 (Supporting Information). The reversible PL intensity manifests the reliability of measurement and the outstanding stability of MnI 2 (XanPO).…”

Section: Ultrahigh Tq Resistancementioning

confidence: 95%

Highly Luminescent Earth‐Benign Organometallic Manganese Halide Crystals with Ultrahigh Thermal Stability of Emission from 4 to 623 K

Tan

Chen

Chuang

et al. 2022

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vigorously studied over the past decades since the emergence of blue LED. [1] A myriad of efficient phosphors including yellow emissive Y 3 Al 5 O 12 :Ce 3+ (YAG:Ce 3+ ), blue emissive BaMgAl 10 O 17 :Eu 2+ (BAM:Eu 2+ ), green emissive Si 6−z Al z O z N 8−z :Eu 2+ (0 < z ≤ 4.2) (β-Sialon:Eu 2+ ), and red emissive Y 2 O 3 :Eu 3+ have been commercialized and applied in indoor and outdoor illumination, traffic lights, and display backlight to name but a few. Nonetheless, the high junction temperature of LED chips (usually ≥150 °C) leads to nonradiative relaxation and diminish the luminescence efficiency of phosphors. [2] This phenomenon is widely known as thermal quenching (TQ) and is the main issue in further improving the performance and application of PC-LEDs. [2][3][4] The effect is expected to be even more severe in emerging micro-LED applications due to the proximity of phosphors with the LEDs. Furthermore, in traditional phosphors, the emission comes from atomic electron transition of earth scarce rare-earth elements, and the mining process of these elements poses a great threat to the environment and the health of the miners. [5] Therefore, the development of earth abundant emitters with high efficiency and TQ-resistant is urgent.

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Section: Ultrahigh Tq Resistancementioning

confidence: 95%

Highly Luminescent Earth‐Benign Organometallic Manganese Halide Crystals with Ultrahigh Thermal Stability of Emission from 4 to 623 K

Tan

Chen

Chuang

et al. 2022

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“…54,60 ZTQ and NTQ phenomena were reportedly observed for a broad variety of phosphors doped with either a rare Earth ion(s), e.g. Eu 2+ , Eu 3+ , 78,79 Ce 3+ , 80 Tb 3+ , 81,82 Dy 3+ , 83,84 Tm 3+ , 84 Sm 3+ , 85 a transition metal ion, e.g., Mn 2+ , [86][87][88][89] Mn 4+ , 90,91 or an s 2 ion (Bi 3+ ), [92][93][94] when excited by an ultraviolet or a visible radiation. Despite considerable differences in type of the activator and/or host lattice as well as in the nature of the electronic transitions associated with the light absorption and emission processes for the above-mentioned phosphors, the explanations for NTQ and ZTQ in most of the papers were similar.…”

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confidence: 99%

On The Validity of the Defect- Induced Negative Thermal Quenching of Eu²⁺-Doped Phosphors

Yan¹

2023

ECS J. Solid State Sci. Technol.

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In this paper, defect-induced negative thermal quenching (NTQ) of Eu2+-doped phosphors is overviewed. NTQ denotes that the integrated emission intensity of a given phosphor increases continuously with increasing temperature up to a certain elevated temperature. The NTQ phenomenon of Eu2+ luminescence was reportedly observed in a broad variety of lattices. The NTQ of these Eu2+-doped phosphors was generally ascribed to thermally stimulated detrapping of the excitation light stored in defects (traps) and subsequent energy transfer from the defects to the Eu2+ 5d levels. Validity of defect- induced NTQ of Eu2+-doped phosphors is assessed and factors that may contribute to the measured emission intensity of a given phosphor at elevated temperatures are discussed. It is suggested that it is debatable whether NTQ could be an intrinsic property of the blue-emitting phosphor Na3Sc2(PO4)3: Eu2+, and whether the emission intensity enhancement with increasing temperature for Eu2+-doped phosphors could be related to energy transfer from defects. The temperature dependence of the measured emission intensity alone seems not to be a good measure for evaluating TQ property of a phosphor, since it is affected by not only the quantum efficiency of a phosphor but also some extrinsic factors at elevated temperatures.

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SrWO4: Er3+; an efficient green phosphor for LED and optical thermometry applications

Gopal

Manam

2022

J Mater Sci: Mater Electron

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High thermal stability of green-emitting phosphor NaBaB9O15: Tb3+ via energy compensation

Cited by 15 publications

References 41 publications

Highly Luminescent Earth‐Benign Organometallic Manganese Halide Crystals with Ultrahigh Thermal Stability of Emission from 4 to 623 K

Highly Luminescent Earth‐Benign Organometallic Manganese Halide Crystals with Ultrahigh Thermal Stability of Emission from 4 to 623 K

On The Validity of the Defect- Induced Negative Thermal Quenching of Eu²⁺-Doped Phosphors

SrWO4: Er3+; an efficient green phosphor for LED and optical thermometry applications

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High thermal stability of green-emitting phosphor NaBaB9O15: Tb3+ via energy compensation

Cited by 15 publications

References 41 publications

Highly Luminescent Earth‐Benign Organometallic Manganese Halide Crystals with Ultrahigh Thermal Stability of Emission from 4 to 623 K

Highly Luminescent Earth‐Benign Organometallic Manganese Halide Crystals with Ultrahigh Thermal Stability of Emission from 4 to 623 K

On The Validity of the Defect- Induced Negative Thermal Quenching of Eu2+-Doped Phosphors

SrWO4: Er3+; an efficient green phosphor for LED and optical thermometry applications

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On The Validity of the Defect- Induced Negative Thermal Quenching of Eu²⁺-Doped Phosphors