Refractive index of different perovskite materials

Singh, Jitendra Kumar; Mandal, Sujit; Banerjee, G.

doi:10.1557/s43578-021-00257-8

Cited by 23 publications

(11 citation statements)

References 130 publications

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“…The thickness of the crystals for lasing is determined as 335 to 368 nm (for n = 4; fig. S14) larger than the wavelength λ of the lasing light within the crystal (λ = 850 nm/n refractive , where n refractive is the refractive index of the crystal; n refractive ~3) (41), which ensures the efficient waveguide during the pumping process. This is the first report that lasing has been achieved in exfoliated 2D tin halide perovskite flakes without external cavity, while Ding et al (40) and Alvarado-Leaños et al (42) only achieved amplified spontaneous emission (ASE) in 2D tin halide perovskites when external resonant cavities were absent.…”

Section: Resultsmentioning

confidence: 99%

Phase-pure 2D tin halide perovskite thin flakes for stable lasing

Li,

Zhou,

Xia

et al. 2023

Sci. Adv.

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Ruddlesden-Popper tin halide perovskites are a class of two-dimensional (2D) semiconductors with exceptional optoelectronic properties, high carrier mobility, and low toxicity. However, the synthesis of phase-pure 2D tin perovskites is still challenging, and the fundamental understanding of their optoelectronic properties is deficient compared to their lead counterparts. Here, we report the synthesis of a series of 2D tin perovskite bulk crystals with high phase purity via a mixed-solvent strategy. By engineering the quantum-well thickness (related to n value) and organic ligands, the optoelectronic properties, including photoluminescence emission, exciton-phonon coupling strength, and exciton binding energy, exhibit a wide tunability. In addition, these 2D tin perovskites exhibited excellent lasing performance. Both high– n value tin perovskite ( n > 1) and n = 1 tin perovskite thin flakes were successfully optically pumped to lase. Furthermore, the lasing from 2D tin perovskites could be maintained up to room temperature. Our findings highlight the tremendous potential of 2D tin perovskites as promising candidates for high-performance lasers.

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Section: Resultsmentioning

confidence: 99%

Phase-pure 2D tin halide perovskite thin flakes for stable lasing

Li,

Zhou,

Xia

et al. 2023

Sci. Adv.

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“…However, the real part of dielectric permittivity of RE 3+ MoN 3 tends toward the lower values, and the refractive index decreases. This leads to some unusual optical phenomena like superlensing [32].…”

Section: Resultsmentioning

confidence: 99%

Mechanical, electronic, and optoelectronic properties of RE³⁺MoN₃ (RE³⁺ = La, Ce, Nd, Pr, Sm) perovskites

Sohail,

Muhammad,

Khesro

et al. 2023

Int J of Quantum Chemistry

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The electronic structure, mechanical, and optical properties of RE3+MoN3 (RE3+ = La, Ce, Pr, Nd, Sm) perovskites were calculated by the Full Potential method (FP‐LAPW) based on density functional theory. The unit cell structure (space group ) was optimized using the PBE‐GGA functional. Furthermore, the calculated tolerance factor is found in the permissible range for a cubic perovskite. Elastic properties of these compounds confirm the mechanical stability, anisotropic, ductile, metallic, stiffer, and rigid nature. The electronic structure calculations were then performed using the mBJ functional followed by hybrid functional & Hubbard correction U. The electron charge density plots revealed ionic and covalent bonding in RE3+MoN3. The total density of states and band structure calculations display metallic behavior for the RE3+MoN3 compounds. Maximum refractive index (4.8), reflectivity (.72), and optical conductivity (8.21) were obtained for LaMoN3 perovskites. Different optical properties have been calculated; therefore, we anticipate the identification of highly useful optoelectronic applications.

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“…[ 58 ] n is refractive index of the host, and n = 2.375 can be obtained from the empirical formula without considering the influence of wavelength. [ 59 ] The J–O intensity parameters (Ω 2 and Ω 4 ) of BLGO: 0.30Eu 3+ phosphors obtained are given in Table 1 .…”

Section: Resultsmentioning

confidence: 99%

Anomalous ⁵D₀→⁷F₄ Transition of Eu³⁺‐Doped BaLaGaO₄ Phosphors for WLEDs and Plant Growth Applications

Ling‐Hu,

Guo,

et al. 2023

Advanced Optical Materials

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Europium (Eu3+) doped phosphors typically exhibit orange or red emission and are used in lighting and display applications, originating from the 5D0→7F1 and 5D0→7F2 transitions of Eu3+. However, BaLaGaO4: xEu3+ deep‐red phosphor, when excited by near‐ultraviolet light, is mainly 5D0→7F4 transition (703 nm). Meantime, the BaLaGaO4: 0.30Eu3+ exhibits a high I423K/I298K value of 71% and a high quantum yield of 82.54%. Furthermore, the prepared samples are mixed with commercial blue and green phosphors in a certain proportion to make white light‐emitting diodes (WLEDs). The color coordinate of the fabricated WLEDs is (0.3208, 0.3436), with a color rendering index of 91.9 and an R9 value of 73. Based on the unique spectral characteristics of this compound, a prototype device of a deep‐red LED with phosphor conversion is developed, which exhibits color coordinates (0.6294, 0.3581) and a color purity of 96.4%. The conducted germination experiments with plant seeds have provided compelling evidence regarding the considerable positive effects of the deep‐red LEDs on plant growth. These findings further emphasize the highly promising potential application of BaLaGaO4: Eu3+ deep‐red phosphor in WLEDs and plant growth lighting.

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Refractive index of different perovskite materials

Cited by 23 publications

References 130 publications

Phase-pure 2D tin halide perovskite thin flakes for stable lasing

Phase-pure 2D tin halide perovskite thin flakes for stable lasing

Mechanical, electronic, and optoelectronic properties of RE³⁺MoN₃ (RE³⁺ = La, Ce, Nd, Pr, Sm) perovskites

Anomalous ⁵D₀→⁷F₄ Transition of Eu³⁺‐Doped BaLaGaO₄ Phosphors for WLEDs and Plant Growth Applications

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Refractive index of different perovskite materials

Cited by 23 publications

References 130 publications

Phase-pure 2D tin halide perovskite thin flakes for stable lasing

Phase-pure 2D tin halide perovskite thin flakes for stable lasing

Mechanical, electronic, and optoelectronic properties of RE3+MoN3 (RE3+ = La, Ce, Nd, Pr, Sm) perovskites

Anomalous 5D0→7F4 Transition of Eu3+‐Doped BaLaGaO4 Phosphors for WLEDs and Plant Growth Applications

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Product

Resources

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Mechanical, electronic, and optoelectronic properties of RE³⁺MoN₃ (RE³⁺ = La, Ce, Nd, Pr, Sm) perovskites

Anomalous ⁵D₀→⁷F₄ Transition of Eu³⁺‐Doped BaLaGaO₄ Phosphors for WLEDs and Plant Growth Applications