Bead-on-string fibers electrospun from terbium acetylacetonate hydrate doped poly methyl methacrylate

Li, Y.; Wang, Y.; Pun, Edwin Yue‐Bun; Lin, Hai

doi:10.1364/ome.8.000276

Cited by 9 publications

(4 citation statements)

References 51 publications

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“…The radiant flux of the pure blue LED chips of a moving current of 120 mA was 95 mW, (2) By dispensing, the translucent silicone is loaded in the lead frame and cured for 1 h at 1500C, (3) The phosphorus dusts are amalgamated with a silicone adhesive and a solvent has the base of alkyl in order to create phosphorus termination slurry. As previously shown, the pulsation spray covering with the time management could boost the phosphorous slurry quality [17], [18].…”

Section: Experimental Details 21 Mc-wleds Simulationmentioning

confidence: 67%

Employing SiO2 nano-particles in conformal and in-cup structures of 8500 K white LEDs

Thi

That

2021

Bulletin EEI

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SiO2 nano-particles have been examined in a distant phosphor structure for the elevated luminous quality and better consistency of white light-emitting diodes with angular-dependent associated color temperature (CCT). The luminous scattering ability could be increased by applying SiO2 nano-particles contain silicone to the outside of the phosphorus coating. In specific, the strength of blue light at wide angles is increased and differences in CCT can be minimized. In addition, owing to the sufficient refractive indices of silicone-containing SiO2 nanoparticles between the air and phosphorus layers, the luminous flux was improved. This new configuration decreases angular-dependent CCT deviations in the range of -700 to 700 from 1000 to 420 K. In comparison, at a 120 mA driving current, the rise of lumen flux increased by 2.25% relative to an usual distant phosphor structure without SiO2 nano-particles. As a result, in a distant phosphor structure, the SiO2 nano-particles could not only enhance the uniformity of illumination but also enhance the output of light.

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Section: Experimental Details 21 Mc-wleds Simulationmentioning

confidence: 67%

Employing SiO2 nano-particles in conformal and in-cup structures of 8500 K white LEDs

Thi

That

2021

Bulletin EEI

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“…Under the excitation electric power of 115.61 mW for 308 nm UVB-LED, the total luminous uxes Φ V of Eu(BA)(TTA) 2 /PVP and Eu(BA)(TTA) 2 Phen/PVP are integrated to be 13.20 and 16.60 mlm by equation (3) and luminous e cacy get 11.4% and 14.4% lm/W, respectively, which are higher than 2.63 mlm and 2.27% lm/W in TAH/ PMMA [54]. Under the excitation electric power of 72.14 mW for 367 nm UVA-LED, the luminous uxes of residual LEDs are 0.33 × 10 −2 and 0.25 × 10 −2 mlm, and its role is negligible in Eu(BA)(TTA) 2 /PVP and Eu(BA)(TTA) 2 Phen/PVP, respectively.…”

Section: Advances In Materials Science and Engineeringmentioning

confidence: 99%

Multiligand Europium Complexes Incorporated Polyvinylpyrrolidone for Enhanced Solar Cell

Guo

et al. 2019

Advances in Materials Science and Engineering

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Intense reddish-orange fluorescence of Eu3+ is observed in multiligand europium complexes Eu(BA)(TTA)2 and Eu(BA)(TTA)2Phen doped polyvinylpyrrolidone (PVP). Under 367 nm UVA-LED pumping with 708.5 μW, the net emission powers are as high as 204.8 and 243.2 μW, and the total emission photon numbers are derived to be 635.9 × 1012 and 754.9 × 1012 cps for Eu(BA)(TTA)2 and Eu(BA)(TTA)2Phen doped PVP thin films, respectively. It is incredible that the quantum yield (QY) is up to 57.87% in the former; furthermore, as the introduction of Phen, the QY of Eu3+ is increased to 62.03%, verifying the effectiveness of multiligands in photon conversion. Conclusive photon quantification and efficient fluorescence emission reveal the potential of europium complexes/PVP as UV-visible conversion layers for enhanced solar cells.

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“…However, the problem with this method is the low emission spectra so that the WLED created this way cannot fully exploit the light at higher wavelength resulting in poor CRI and low light quality. The solution of adding one more chip alongside the blue one and the yellow phosphor was proposed for this issues that there are many results from previous reports have confirmed the effectiveness of the additional phosphors in enhancing LEDs emission spectrum leading to high color quality color and CRI [15][16][17][18].…”

Section: Introductionmentioning

confidence: 99%

The impacts of red-emitting phosphor Mg8Ge2O11F2:Mn4+ on the color rendering index of convex-dual-layer remote phosphor WLEDs at 5600 K

2021

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The poor color rendering index (CRI) induced by mono chip and phosphor configuration in the conventional white-light light-emitting diode (LED) urges for developments in both packaging and material, thus, a modern lighting solution was introduced. The dual-layer phosphor package is an innovative configuration that can retain the lumen output of conventional white light emitting diode (WLED) while also enhancing color quality. The structure of dual-layer phosphor package that was proposed includes two chips and one phosphor. The priority in this research is to keep improving the lighting properties of WLED, therefore, further experiments with this dualchips and dual-phosphor package are conducted. The lighting properties of LED are measured multiple times with its nitride-based phosphor being altered in proportions and densities each occasion, the results are calculated with a color design model made specifically to monitor and adjust the color of white-light from LED to match desired outcome. The WLED at 5600 K correlated color temperature (CCT) is the sole research object of the experiments. The measured parameters from the 5600 K WLED and the color coordinates of CIE 1931 simulated from the color design model show that 0.0063 is the highest possible discrepancy at 5600 K (CCT). The information from this manuscript provide the manufacturers with the most efficient approach to create a white LED that has good color quality, high CRI and luminous flux.

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Bead-on-string fibers electrospun from terbium acetylacetonate hydrate doped poly methyl methacrylate

Cited by 9 publications

References 51 publications

Employing SiO2 nano-particles in conformal and in-cup structures of 8500 K white LEDs

Employing SiO2 nano-particles in conformal and in-cup structures of 8500 K white LEDs

Multiligand Europium Complexes Incorporated Polyvinylpyrrolidone for Enhanced Solar Cell

The impacts of red-emitting phosphor Mg8Ge2O11F2:Mn4+ on the color rendering index of convex-dual-layer remote phosphor WLEDs at 5600 K

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