Spectroscopic properties and thermally stable orange-red luminescence of Sm:Zr:LiNbO3 and Sm:Hf:LiNbO3 for white LED applications

Yang, Mingming; Long, Siwei; Zhu, Yunzhong; Ma, Haozhe; Lin, Shaopeng; Quan, Jiliang; Wang, Biao

doi:10.1016/j.ceramint.2020.09.027

Cited by 13 publications

(4 citation statements)

References 23 publications

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“…Efficient non‐radiative energy transfers between Sm 3+ ions, coupled with the influence of d‐d interaction on energy levels, contribute to diminished light emission overall. This comprehension is essential for optimizing the performance of Sm 3+ doped lithium niobate ceramics in diverse applications, such as optoelectronics and laser devices 75 …”

Section: Resultsmentioning

confidence: 99%

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Electrical and optical properties of environmental friendly Li_(1‐x)Sm_x/₃NbO₃ ceramics for high‐temperature energy storage applications

Satyarthi,

Singh,

Verma

et al. 2024

Energy Storage

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This research article delves into the synthesis and characterization of Li(1‐x)Sm(x/3)NbO3 ceramic, employing a high‐energy ball milling process. The investigation explores the incorporation of Sm3+ at the Li+1 site across a range of compositions (x = 0, 0.01, 0.02, 0.03, 0.04, 0.05). Structural analysis, using x‐ray diffraction (XRD) and Rietveld structural refinement, establishes that within the investigated composition range, no significant changes in the crystal structure are evident. The x‐ray photoelectron spectroscopy revealed the presence of oxygen vacancies as well as the stable oxidation state of different elements like O2−, Nb5+, Sm3+, and Li1+. At sintering temperature 1050°C, the average grain sizes vary approximately from 1.5 to 3.8 μm for different compositions with regular grain morphology. The UV‐Vis analysis reveals a noteworthy reduction in the band gap to 3.09 eV for the x = 0.01 composition. Photoluminescence studies exhibit distinct green, orange, and red bands, with the highest intensity observed for x = 0.01, showcasing promising optical properties. The dielectric permittivity of Sm‐substituted compositions surpasses the response of pure LiNbO3, demonstrating an increasing trend with temperature in the frequency range 100 Hz‐1 MHz intriguingly, no Curie temperature is observed up to 500°C for any composition. The polarization vs electric field hysteresis loop response highlights better polarization characteristics at the room temperature and maximum polarization is 0.66 μC/cm2 for the composition x = 0.05. The energy storage response of the developed compositions is investigated, which reveals a maximum efficiency of 46.64% for x = 0.04 in Li(1‐x)Sm(x/3)NbO3. The tunable optical properties, enhanced dielectric response, and notable energy efficiency of these high TC ceramics suggest their utility across diverse applications. These findings not only contribute to the understanding of functional ceramic materials but also pave the way for their optimized utilization in advanced technological applications, particularly in energy storage devices under nonambient conditions at high temperatures.

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Section: Resultsmentioning

confidence: 99%

“…This comprehension is essential for optimizing the performance of Sm 3+ doped lithium niobate ceramics in diverse applications, such as optoelectronics and laser devices. 75…”

Section: Photoluminescence Analysismentioning

confidence: 99%

Electrical and optical properties of environmental friendly Li_(1‐x)Sm_x/₃NbO₃ ceramics for high‐temperature energy storage applications

Satyarthi,

Singh,

Verma

et al. 2024

Energy Storage

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“…Indeed, two kinds of such ions were incorporated into LiNbO 3 crystals to yield Ru:Fe:LiNbO 3 crystals in order to realize nonvolatile holographic storage. It was also demonstrated that doping other types of impurity ions can improve the resistance ability of LiNbO 3 crystals for optical damage [9][10][11][12][13][14][15]. A set of optical damage resistance dopants, including In, Mg, Zn, Sc and Hf, were doped into the crystal for such a purpose [16].…”

Section: Introductionmentioning

confidence: 99%

Optimization of Blue Photorefractive Properties and Exponential Gain of Photorefraction in Sc-Doped Ru:Fe:LiNbO3 Crystals

Xu¹,

Chen²

2022

Crystals

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Sc:Ru:Fe:LiNbO3 crystals were grown from congruent melt by using the Czochralski method. A series of LiNbO3 crystals (Li/Nb = 48.6/51.4) with 0.1 wt% RuO2, 0.06 wt% Fe2O3 and various concentrations of Sc203 were prepared. RF1 and RF4 refers to the samples containing 0 mol% Sc203 and 3 mol% Sc203, respectively. The photorefractive properties of RF4 were measured by Kr+ laser (λ = 476 nm blue light): ηs = 75.7%, τw = 11 s, M/# = 19.52, S = 2.85 cmJ−1, Γ = 31.8 cm−1 and ∆nmax = 6.66 × 10−5. The photorefractive properties of five systems (ηs, M/#, S, Γ and ∆nmax) under 476 nm wavelength from RF1 to RF4 continually increased the response time, while τw was continually shortened. Comparing the photorefractive properties of Sc (1 mol%):Ru (0.1 wt%):Fe (0.06 wt%): LiNbO3 measured by Kr+ laser (λ = 476 nm blue light) with Sc (1 mol%):Fe (0.06 wt%):LiNbO3 measured by He-Ne laser (633 nm red light), ηs increased by a factor of 1.9, Vw (response rate) increased by a factor of 13.9, M/# increased by a factor of 1.8 and S increased by a factor of 32. The ∆nmax improved by a factor of 1.4. A strong blue photorefraction was created by the two-center effect and the remarkable characteristic of being in phase between the two gratings recorded in shallow and deep trap centers. The photorefractive properties (ηS, τw, M/#, S, ∆nmax) were increased with an increase in Sc3+ ion concentration. Damage-resistant dopants such as Sc3+ ions were no longer resistant to damage, but they enhanced the photorefractive properties at the 476 nm wavelength. The experimental results clearly show that Sc-doped two-center Ru:Fe:LiNbO3 crystal is a promising candidate blue photorefraction material for volume holographic storage. Sc-doped LiNbO3 crystal can significantly enhance the blue photorefractive properties according to the experimental parameters. Therefore, the Sc:Ru:Fe:LiNbO3 crystal has better photorefractive properties than the Ru:Fe:LiNbO3 crystal.

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“…[1][2][3] The research on phosphors has attracted increasing attention. [4][5][6][7][8] Recently, due to the emphasis on LEDs' high color rendering index (CRI), doping elements have gradually transformed from Eu(III), Ce(III), and Tb(III) into Mn(IV), [9][10][11][12][13] which has a stable red-light emission. However, phosphors still have lifetime and efficiency problems.…”

Section: Introductionmentioning

confidence: 99%

The relationship between basic group resonance and quantum yield of high efficiency red light fluorescent solutions

et al. 2021

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Spectroscopic properties and thermally stable orange-red luminescence of Sm:Zr:LiNbO3 and Sm:Hf:LiNbO3 for white LED applications

Cited by 13 publications

References 23 publications

Electrical and optical properties of environmental friendly Li_(1‐x)Sm_x/₃NbO₃ ceramics for high‐temperature energy storage applications

Electrical and optical properties of environmental friendly Li_(1‐x)Sm_x/₃NbO₃ ceramics for high‐temperature energy storage applications

Optimization of Blue Photorefractive Properties and Exponential Gain of Photorefraction in Sc-Doped Ru:Fe:LiNbO3 Crystals

The relationship between basic group resonance and quantum yield of high efficiency red light fluorescent solutions

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Spectroscopic properties and thermally stable orange-red luminescence of Sm:Zr:LiNbO3 and Sm:Hf:LiNbO3 for white LED applications

Cited by 13 publications

References 23 publications

Electrical and optical properties of environmental friendly Li(1‐x)Smx/3NbO3 ceramics for high‐temperature energy storage applications

Electrical and optical properties of environmental friendly Li(1‐x)Smx/3NbO3 ceramics for high‐temperature energy storage applications

Optimization of Blue Photorefractive Properties and Exponential Gain of Photorefraction in Sc-Doped Ru:Fe:LiNbO3 Crystals

The relationship between basic group resonance and quantum yield of high efficiency red light fluorescent solutions

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Electrical and optical properties of environmental friendly Li_(1‐x)Sm_x/₃NbO₃ ceramics for high‐temperature energy storage applications

Electrical and optical properties of environmental friendly Li_(1‐x)Sm_x/₃NbO₃ ceramics for high‐temperature energy storage applications