Performance Enhancement of White LEDs Through Phosphor/Silicone Composite Particles

Lei, Xiang; Zheng, Hao; Liu, Sheng; Luo, Xiaobing

doi:10.1109/lpt.2015.2406792

IEEE Photon. Technol. Lett.

2015

DOI: 10.1109/lpt.2015.2406792

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Performance Enhancement of White LEDs Through Phosphor/Silicone Composite Particles

Xiang Lei

Hao Zheng

Sheng Liu

et al.

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Cited by 4 publications

References 19 publications

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Quantum Dots Electrostatically Adsorbed on the Surface of SiO₂ Nanoparticle-Decorated Phosphor Particles for White Light-Emitting Diodes with a Stable Optical Performance

Zhou

et al. 2020

ACS Appl. Nano Mater.

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White light-emitting diodes (WLEDs) based on phosphor and quantum dots (QDs) have attracted worldwide attention. Phosphor and QDs with different physical characteristics are distributed unevenly in a polymer matrix, resulting in the spectrum changes of the phosphor-QD-based WLEDs (PQ-WLEDs). Aiming for a similar distribution of QDs and phosphor in the matrix, we proposed the phosphor/SiO2/QD (PSQ) composite particles in which negatively charged QDs are electrostatically adsorbed on the surface of phosphor particles decorated with positively charged SiO2. The PSQ composite particles retained a high quantum yield of 77.6%. PSQ-WLEDs with varied standing times of the uncured PSQ-added silicone showed stable spectra with stable optical parameters. For comparison, the spectra of PQ-WLEDs with untreated phosphor and QDs obviously changed with the standing time. Specifically, the LE, CCT, and CRI of PSQ-WLEDs using Dow corning OE 180 silicone only changed by 1.7, 3.3, and 3.9%, respectively, after a long sufficient standing time; however, the LE, CCT, and CRI of PQ-WLEDs using the same silicone changed by 9, 5.4, and 10%, respectively. This optical instability in PQ-WLEDs resulted from the difference between the distribution of phosphor and QDs in the mixed silicone matrix after standing. However, the distribution of phosphor and QDs in PSQ-WLEDs was always the same with each other due to the composite structure. Applying the PSQ composite particles in WLEDs, we can easily attain highly optical consistent phosphor-QD-based WLEDs and provide an efficient control of product quality.

show abstract

Quantum Dots Electrostatically Adsorbed on the Surface of SiO₂ Nanoparticle-Decorated Phosphor Particles for White Light-Emitting Diodes with a Stable Optical Performance

Zhou

et al. 2020

ACS Appl. Nano Mater.

View full text Add to dashboard Cite

show abstract

Study on Optical Consistency of Centrifuged LEDs in Packaging Processes

Wang

Zhao

et al. 2019

IEEE Trans. Compon., Packag. Manufact. Technol.

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Controlling Phosphor Particle Distribution for High-Angular-Color-Uniformity and Low-Cost LEDs Based on Thermalcapillary Flow

Liu

Wang

et al. 2021

IEEE Trans. Electron Devices

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Performance Enhancement of White LEDs Through Phosphor/Silicone Composite Particles

Cited by 4 publications

References 19 publications

Quantum Dots Electrostatically Adsorbed on the Surface of SiO₂ Nanoparticle-Decorated Phosphor Particles for White Light-Emitting Diodes with a Stable Optical Performance

Quantum Dots Electrostatically Adsorbed on the Surface of SiO₂ Nanoparticle-Decorated Phosphor Particles for White Light-Emitting Diodes with a Stable Optical Performance

Study on Optical Consistency of Centrifuged LEDs in Packaging Processes

Controlling Phosphor Particle Distribution for High-Angular-Color-Uniformity and Low-Cost LEDs Based on Thermalcapillary Flow

Contact Info

Product

Resources

About

Performance Enhancement of White LEDs Through Phosphor/Silicone Composite Particles

Cited by 4 publications

References 19 publications

Quantum Dots Electrostatically Adsorbed on the Surface of SiO2 Nanoparticle-Decorated Phosphor Particles for White Light-Emitting Diodes with a Stable Optical Performance

Quantum Dots Electrostatically Adsorbed on the Surface of SiO2 Nanoparticle-Decorated Phosphor Particles for White Light-Emitting Diodes with a Stable Optical Performance

Study on Optical Consistency of Centrifuged LEDs in Packaging Processes

Controlling Phosphor Particle Distribution for High-Angular-Color-Uniformity and Low-Cost LEDs Based on Thermalcapillary Flow

Contact Info

Product

Resources

About

Quantum Dots Electrostatically Adsorbed on the Surface of SiO₂ Nanoparticle-Decorated Phosphor Particles for White Light-Emitting Diodes with a Stable Optical Performance

Quantum Dots Electrostatically Adsorbed on the Surface of SiO₂ Nanoparticle-Decorated Phosphor Particles for White Light-Emitting Diodes with a Stable Optical Performance