Color tunable white LEDs based on low sintering temperature Phosphor−in−Glass

Weng, Zixin; Yi, Xuezhuan; Tang, Yanru; Tian, Yanna; Chen, Jie; Zhao, Di; Zhou, Shengming; Lin, Yandan

doi:10.1016/j.optmat.2021.111043

Cited by 9 publications

(1 citation statement)

References 30 publications

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“…As the fourth-generation light source, white light diodes (WLEDs) have been widely used in the field of white lighting and backlight [1][2][3]. The combination of yellow Ce 3+ : Y 3 Al 5 O 12 (Ce:YAG) phosphors and blue InGaN/GaN chip is the most common method to obtain WLEDs [4][5][6]. However, the further development of WLEDs is limited by the traditional phosphor-converter phosphors-in-silicones (PiSs) [7][8][9], because PiSs have problems such as thermal quenching of phosphors and degradation of resin at high temperature.…”

Section: Introductionmentioning

confidence: 99%

A Novel Preparation of Special-Shaped Phosphors-in-Glass by Gel Casting with Isobam for High-Power WLEDs Lighting

et al. 2022

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Phosphors-in-glass (PiGs) regarded as a promising phosphor-converter for white light emitting diodes (WLEDs) is being researched widely. However, there are few reports on the effect of changing the shape of PiGs on the color rendering index (CRI) and heat dissipation of WLEDs. In this paper, gel casting with Isobam was first attempted in preparing special-shaped PiGs successfully. It exhibited that 76 wt.% was the optimum solid content based on the rheological properties of slurry and the shrinkage of green bodies. The sintering rate should be kept at a low speed and glass transition temperature (Tg) of glass powders must be higher than sublimation temperatures (Ts) of APS and Isobam. The CRI of PiGs was increased by about 27% after changing the shape of PiGs from cylinder to dome. Most importantly, operating temperature also reduced effectively the increase of the surface area of PiGs. Therefore, changing the shape of PiGs by gel casting with Isobam is a creative way for high-power WLEDs lighting.

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