Eu³⁺-Doped Phosphor-in-Glass: A Route toward Tunable Multicolor Materials for Near-UV High-Power Warm-White LEDs

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• 作者：Jiankun Deng ; Wei Li ; Haoran Zhang ; Yingliang Liu ; Bingfu Lei ; Haiming Zhang ; Lingshan Liu ; Xue Bai ; Haoyang Luo ; Hongzhong Liu ; Wei-Ren Liu and Jing Wang
• 刊名：Advanced Optical Materials
• 出版年：2017
• 出版时间：February 2, 2017
• 年：2017
• 卷：5
• 期：3
• 全文大小：2371K
• ISSN：2195-1071

文摘

A novel route toward tunable multicolor materials through phosphor-in-glass (PiG) technology is proposed in this work. Before that, an ultrastable Eu³⁺-doped precursor luminescent glass frit without thermal quenching in the temperature range of 80–480 K is developed to serve as an encapsulant that not only protects the embedded phosphor but also provides the red-emitting component for the PiG. By adjusting the mass ratio of Sr₄Al₁₄O₂₅:Eu²⁺ phosphor to glass frit, a series of tunable multicolor Eu³⁺-doped PiG is obtained and exhibits a good resistance to the harsh conditions. Meanwhile, the luminescent color of Eu³⁺-doped PiG can be modified by changing the excitation wavelength or ambient temperature. Finally, corresponding Eu³⁺-doped PiG encapsulated high-power light-emitting diodes are further fabricated, especially the warm white-light-emitting diodes (WLEDs), showing good color stability under different drive currents and with different periods of operating time. All these results indicate that Eu³⁺-doped PiG is a potential color converter applied in the high-power warm-WLEDs and the route above opens up a facile and potential approach to obtain multicolor materials.