Investigation on the Luminescent Property and Application of In2BP3O12:Cr3+ Broadband Near-Infrared Phosphor※

Zhang, Jingrong; Huang, Decai; Huang, Chen; Liang, Sisi

doi:10.6023/a21120598

Cited by 5 publications

(2 citation statements)

References 39 publications

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“…Once the wavelengths of band maxima (rather than zero-phonon lines) are known, the Dq/B value can be calculated using a series of fast estimation formulas . This value is usually compared to that of the crosspoint between 4 T 2 ( 4 F) and 2 E( 2 G) levels, which is reported to be 2.1, − 2.2, − or even 2.3 − for C/B = 4.5–4.8, to indicate the strong or weak strength of the crystal field as shown in Figure . It thus becomes a question as to how those values are obtained and which one constitutes a better representation of the boundary between strong and weak crystal-field potentials.…”

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confidence: 99%

Host Dependency of Boundary between Strong and Weak Crystal Field Strength of Cr³⁺ Luminescence

Song,

Tanner,

Liu

2024

J. Phys. Chem. Lett.

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Cr 3+ doped near-infrared phosphors hold significant applications and generate considerable research interest. The critical parameter for assessing the strength of the crystal field for Cr 3+ in the Tanabe−Sugano diagram is the boundary value of Dq/B, representing the ratio of crystal field splitting to the Racah parameter B. Nevertheless, there are conflicting values for this parameter, as reported in various studies, such as 2.1, 2.2, and 2.3 for C/B = 4.5−4.8. Moreover, some Cr 3+ doped phosphors with wide-band emissions exhibit a Dq/B value that falls within the region of a contradictory strong field. In this study, we numerically determine the boundary value of Dq/B, which distinguishes between strong and weak fields. The results then demonstrate a dependence on the host material and are correlated with the values of Racah parameters B and C. This work resolves the inconsistency between the boundary values of Dq/B and the emission profile of Cr 3+ , providing researchers with a more profound comprehension of Cr 3+ luminescence.

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confidence: 99%

Host Dependency of Boundary between Strong and Weak Crystal Field Strength of Cr³⁺ Luminescence

Song,

Tanner,

Liu

2024

J. Phys. Chem. Lett.

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“…17 Therefore, incorporating Cr 3+ ions into lead-free metal halide perovskites is a wise decision because they have the capability to generate a broad range of emissions, spanning from 650 to 1350 nm when situated within a crystal field of weak octahedral coordination. 18,19 Meanwhile, the selective capturing of invisible NIR light information encryption modes was expected to enable greater security levels and has widespread usage in daily life.…”

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confidence: 99%

Near-infrared Cr³⁺-doped lead-free halide perovskite microcrystals for information encryption and temperature thermometry

Zhao,

Li,

Ling

et al. 2024

J. Mater. Chem. C

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An Efficient Narrow-band Blue-emitting Phosphor Ba₃Y₂B₆O₁₅:Bi³⁺ and Its Application

Liang,

Zhang,

Huang

et al. 2023

Acta Chimica Sinica

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At present, the development of efficient (high quantum efficiency and high thermal stability) narrow-band emitting phosphors is a crucial problem in the application of white light emitting diodes (WLED) for high-performance liquid crystal display (LCD) backlights. In this work, an efficient narrow-band blue emitting phosphor Ba3Y2B6O15:Bi 3+ was prepared by high temperature solid state method, and its structure and properties were characterized and calculated. By using the density functional theory (DFT), Ba3Y2B6O15 is calculated to be a direct band gap material with a high band gap value of 4.67 eV, which is a necessary condition for achieving high quantum efficiency phosphors. The experiment results show that Ba3Y2B6O15:0.5%Bi 3+ has a narrow-band blue-emitting spectrum with a full width at half maximum (FWHM) of 2168 cm −1 (36.2 nm) at 409 nm, which is owing to the 3 P1→ 1 S0 transition of Bi 3+ ions. The emission spectra of Ba3Y2B6O15:0.5%Bi 3+ can be split into two peaks at 406 and 422 nm, respectively, because there are two kinds of Y ions (Y1 and Y2) in the crystal cell of Ba3Y2B6O15. Under the 365 nm UV radiation, the Ba3Y2B6O15:0.5%Bi 3+ exhibits high internal quantum efficiency (IQE＝93.8%), and ultra-high color purity (98.9%). The high quantum efficiency and narrow-band emission spectrum are mainly due to the compact and highly symmetric crystal structure of Ba3Y2B6O15 matrix. The photoluminescence (PL) intensity of Ba3Y2B6O15:0.5%Bi 3+ remains 73.9% of the initial intensity at 150 ℃, and there is almost no color drift. The thermal quenching activation energy (Ea) of Ba3Y2B6O15:0.5%Bi 3+ was calculated to be 0.290 eV by the Arrhenius Equation, which indicates that Ba3Y2B6O15:0.5%Bi 3+ has high thermal stability. When Y 3+ is partially substituted by Sc 3+ , the emission spectrum of Ba3ScxY2-xB6O15:Bi 3+ (0 ≤ x ≤ 1.6) is redshifted with the increase of x. Finally, the blue phosphor Ba3Y2B6O15:0.5%Bi 3+ was mixed with commecial green and red phosphors and then coated them on a 365 nm chip to fabricate a WLED device. Under a driven current of 20 mA, the correlated color temperature of the obtained WLED is 5679 K and the color gamut can reach 95.3% NTSC. Above results indicate that Ba3Y2B6O15:Bi 3+ is a promising phosphor for high-performance LCD backlights. Keywords highly-efficient phosphor; narrow-band emitting; blue phosphor; Ba3Y2B6O15:Bi 3+

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Investigation on the Luminescent Property and Application of In₂BP₃O₁₂:Cr³⁺ Broadband Near-Infrared Phosphor^※

Cited by 5 publications

References 39 publications

Host Dependency of Boundary between Strong and Weak Crystal Field Strength of Cr³⁺ Luminescence

Host Dependency of Boundary between Strong and Weak Crystal Field Strength of Cr³⁺ Luminescence

Near-infrared Cr³⁺-doped lead-free halide perovskite microcrystals for information encryption and temperature thermometry

An Efficient Narrow-band Blue-emitting Phosphor Ba₃Y₂B₆O₁₅:Bi³⁺ and Its Application

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Investigation on the Luminescent Property and Application of In2BP3O12:Cr3+ Broadband Near-Infrared Phosphor※

Cited by 5 publications

References 39 publications

Host Dependency of Boundary between Strong and Weak Crystal Field Strength of Cr3+ Luminescence

Host Dependency of Boundary between Strong and Weak Crystal Field Strength of Cr3+ Luminescence

Near-infrared Cr3+-doped lead-free halide perovskite microcrystals for information encryption and temperature thermometry

An Efficient Narrow-band Blue-emitting Phosphor Ba3Y2B6O15:Bi3+ and Its Application

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Investigation on the Luminescent Property and Application of In₂BP₃O₁₂:Cr³⁺ Broadband Near-Infrared Phosphor^※

Host Dependency of Boundary between Strong and Weak Crystal Field Strength of Cr³⁺ Luminescence

Host Dependency of Boundary between Strong and Weak Crystal Field Strength of Cr³⁺ Luminescence

Near-infrared Cr³⁺-doped lead-free halide perovskite microcrystals for information encryption and temperature thermometry

An Efficient Narrow-band Blue-emitting Phosphor Ba₃Y₂B₆O₁₅:Bi³⁺ and Its Application