Novel orange-red emitting Sm3+-doped Bi4Sr3Te5O19 phosphors with high color purity for white light-emitting diodes

Song, Fengmin

doi:10.1007/s10854-020-03788-8

Cited by 3 publications

(2 citation statements)

References 42 publications

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“…

\begin{equation}\eta \ = \ \frac{{\smallint {L_S}}}{{\smallint {E_R} - \smallint {E_S}}},\end{equation}

where L S is the emission spectrum of the NSBTO:2 mol%Sm 3+ phosphor, E S and E R refer to the excitation spectra of the phosphor and the BaSO 4 reference material. IQE of the NSBTO:2 mol%Sm 3+ materials under an excitation of 404 nm reached 32.58%, which is slightly higher than that reported, such as Na 13 Sr 1.82 Ta 2 (PO 4 ) 9 :18 mol%Sm 3+ (31.29%), Ca 2 LaNbO 6 :5 mol%Sm 3+ (30.41%), and Bi 4 Sr 3 Te 5 O 19 :2 mol%Sm 3+ (17.23%) 68–70 …”

Section: Resultsmentioning

confidence: 59%

“…IQE of the NSBTO:2 mol%Sm 3+ materials under an excitation of 404 nm reached 32.58%, which is slightly higher than that reported, such as Na 13 Sr 1.82 Ta 2 (PO 4 ) 9 :18 mol%Sm 3+ (31.29%), Ca 2 LaNbO 6 :5 mol%Sm 3+ (30.41%), and Bi 4 Sr 3 Te 5 O 19 :2 mol%Sm 3+ (17.23%). [68][69][70] Based on the above admirable luminescence properties, the practical application for the phosphors was evaluated. As depicted in Figure 13A, the NSBTO:2 mol%Sm 3+ phosphor was coated on a 404 nm NUV chip to obtain the single-color emitting LED.…”

Section: Resultsmentioning

confidence: 99%

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A novel reddish‐orange emitting NaSrBiTeO₆:Sm³⁺ phosphor with high moisture resistance and thermostability for horticultural light emitting diode applications

Tang,

Yang,

Yang

et al. 2023

J Am Ceram Soc.

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A sequence of reddish‐orange emitting NaSrBi(1−x)TeO6:xSm3+ phosphors were successfully composited by a favorable solid‐phase chemical process. The sintering temperature is optimized as 850°C. NaSrBiTeO6 (NSBTO):Sm3+ samples were assigned to the cubic double‐perovskite structure, exhibiting the space group of Fmm (225). Photoluminescence emission spectra display the main peaks at 562, 598, 645, and 705 nm at 404 nm excitation. Among them, the most intense emission peak is at 645 nm. The concentration‐quenching mechanism of Sm3+ follows the interaction between electric dipoles and quadrupoles. The asymmetric ratio (I(4G5/2‐6H9/2)/I(4G5/2‐6H5/2) of NSBTO:2 mol%Sm3+ phosphor is extracted as 4.96. The optimum NSBTO:2 mol%Sm3+ phosphor has excellent thermal stability with a remained emission intensity riches 93.61% (420 K). After testing with high‐pressure water steam at various periods, the phosphor remains chemically stable for moisture resistance. For the NSBTO:2 mol%Sm3+ phosphor, the satisfactory color purity and low correlated color temperature (CCT) are obtained with 99.9% and 1494 K, respectively. The electroluminescence spectra of the prepared red light emitting diode (LED) are in conformity with the phytochrome absorption spectra of chlorophyll a, chlorophyll b, PFR, and PR. The white light‐emitting diode (w‐LED) is also perfectly packaged, obtaining an efficient color rendering index (Ra) of 92.12 and CCT of 5553 K. These exceeding optical properties certified that NaSrBi(1−x)TeO6:xSm3+ demonstrates promising prospects and can be efficiently applied in horticultural LED applications.

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“…

\begin{equation}\eta \ = \ \frac{{\smallint {L_S}}}{{\smallint {E_R} - \smallint {E_S}}},\end{equation}

Section: Resultsmentioning

confidence: 59%

Section: Resultsmentioning

confidence: 99%

A novel reddish‐orange emitting NaSrBiTeO₆:Sm³⁺ phosphor with high moisture resistance and thermostability for horticultural light emitting diode applications

Tang,

Yang,

Yang

et al. 2023

J Am Ceram Soc.

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Synthesis of novel K2Sr(MoO4)2:Sm3+ orange–red phosphors and application to high color rendering index white LEDs

Yang,

Xie,

Zhao

2024

J Mater Sci: Mater Electron

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Robust white light emission of UV pumped SrCeO₃: xSm³⁺ perovskites for wLEDs

Cherlan Kottianmadathil,

Seere Valappil,

Vannadil Puthiyaveetil

et al. 2023

Zeitschrift Für Naturforschung A

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Single phased white light emitting phosphors are more ideal for fabricating white LEDs due to higher stability and color reproducibility. Herein, we report a new white light emitting phosphor, SrCeO3: xSm3+ (x = 1 wt%, 2 wt%, 3 wt%) from a blue light emitting phosphor, SrCeO3 using an efficient, low energy consuming fuel excess gel combustion technique. From the XRD crystallographic investigation, all the synthesised samples have orthorhombic structure with space group Pnma. A broad absorption band in the UV–visible spectra around 350 nm occurs due to the efficient energy transfer from Ce4+ to Sm3+ ion. PL spectra analysis at UV excitations 280 nm and 406 nm, consist of 4f-Sm3+ transitions 4G5/2-6H5/2, 4G5/2-6H7/2, 4G5/2-6H9/2 and charge transfer band from O2− to Ce4+. The energy transfer between activator ions occurs through dipole–dipole interaction, owing to concentration quenching after 2 wt% Sm3+ and the optimised dopant concentration was 2 wt%. SrCe0.98Sm0.02O3 showed mixed blue-yellow-orange-red emission, owing near white light under both excitations. PL data were utilised to find the color parameters and found high color rendering index (CRI ∼ 84) for optimised sample at 406 nm excitation. SEM analysis reveals that the optimised sample exhibit dense ensembled morphology with well-defined grain boundaries and uniformity with average grain size ∼1.24 μm. Further, the elemental composition was confirmed using EDS analysis. From the digital photographs of samples, it is foreseen that, SrCe0.98Sm0.02O3 pumped using near UV LED chip can be used for commercial white light generation.

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Novel orange-red emitting Sm3+-doped Bi4Sr3Te5O19 phosphors with high color purity for white light-emitting diodes

Cited by 3 publications

References 42 publications

A novel reddish‐orange emitting NaSrBiTeO₆:Sm³⁺ phosphor with high moisture resistance and thermostability for horticultural light emitting diode applications

A novel reddish‐orange emitting NaSrBiTeO₆:Sm³⁺ phosphor with high moisture resistance and thermostability for horticultural light emitting diode applications

Synthesis of novel K2Sr(MoO4)2:Sm3+ orange–red phosphors and application to high color rendering index white LEDs

Robust white light emission of UV pumped SrCeO₃: xSm³⁺ perovskites for wLEDs

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Novel orange-red emitting Sm3+-doped Bi4Sr3Te5O19 phosphors with high color purity for white light-emitting diodes

Cited by 3 publications

References 42 publications

A novel reddish‐orange emitting NaSrBiTeO6:Sm3+ phosphor with high moisture resistance and thermostability for horticultural light emitting diode applications

A novel reddish‐orange emitting NaSrBiTeO6:Sm3+ phosphor with high moisture resistance and thermostability for horticultural light emitting diode applications

Synthesis of novel K2Sr(MoO4)2:Sm3+ orange–red phosphors and application to high color rendering index white LEDs

Robust white light emission of UV pumped SrCeO3: xSm3+ perovskites for wLEDs

Contact Info

Product

Resources

About

A novel reddish‐orange emitting NaSrBiTeO₆:Sm³⁺ phosphor with high moisture resistance and thermostability for horticultural light emitting diode applications

A novel reddish‐orange emitting NaSrBiTeO₆:Sm³⁺ phosphor with high moisture resistance and thermostability for horticultural light emitting diode applications

Robust white light emission of UV pumped SrCeO₃: xSm³⁺ perovskites for wLEDs