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Efficient spectral regulation in Ce:Lu3(Al,Cr)5O12 and Ce:Lu3(Al,Cr)5O12/Ce:Y3Al5O12 transparent ceramics with high color rendering index for high-power white LEDs/LDs
Journal of Advanced Ceramics ( IF 18.6 ) Pub Date : 2021-07-14 , DOI: 10.1007/s40145-021-0496-8
Tianyuan Zhou 1 , Chen Hou 1 , Le Zhang 1, 2, 3 , Yuelong Ma 1, 4 , Jian Kang 1, 2 , Tao Li 1 , Rui Wang 1 , Jin Huang 1 , Junwei Li 1 , Hao Chen 1, 2 , Farida A. Selim 3 , Haidong Ren 5 , Zhenxiao Fu 5 , Ming Li 6
Affiliation  

Realizing a high color rendering index (CRI) in Ce:LuAG transparent ceramics (TCs) with desired thermal stability is essential to their applications in white LEDs/LDs as color converters. In this study, based on the scheme of configuring the red component by Cr3+ doping, an efficient spectral regulation was realized in Ce,Cr:LuAG TCs. A unilateral shift phenomenon could be observed in both photoluminescence (PL) and photoluminescence excitation (PLE) spectra of TCs. By constructing TC-based white LED/LD devices in a remote excitation mode, luminescence properties of Ce,Cr:LuAG TCs were systematically investigated. The CRI values of Ce:LuAG TC based white LEDs could be increased by a magnitude of 46.2%. Particularly, by combining the as fabricated Ce,Cr:LuAG TCs with a 0.5 at% Ce:YAG TC, surprising CRI values of 88 and 85.5 were obtained in TC based white LEDs and LDs, respectively. Therefore, Ce,Cr:LuAG TC is a highly promising color convertor for high-power white LEDs/LDs applied in general lighting and displaying.



中文翻译:

Ce:Lu3(Al,Cr)5O12 和 Ce:Lu3(Al,Cr)5O12/Ce:Y3Al5O12 透明陶瓷的高效光谱调节,具有高显色指数,用于大功率白光 LED/LD

在具有所需热稳定性的 Ce:LuAG 透明陶瓷 (TC) 中实现高显色指数 (CRI) 对于它们作为颜色转换器在白光 LED/LD 中的应用至关重要。本研究基于 Cr 3+配置红色成分的方案掺杂,在 Ce,Cr:LuAG TCs 中实现了有效的光谱调节。在 TC 的光致发光 (PL) 和光致发光激发 (PLE) 光谱中都可以观察到单边位移现象。通过在远程激发模式下构建基于 TC 的白光 LED/LD 器件,系统地研究了 Ce,Cr:LuAG TCs 的发光特性。基于 Ce:LuAG TC 的白光 LED 的 CRI 值可以提高 46.2%。特别是,通过将制造的 Ce,Cr:LuAG TC 与 0.5 at% Ce:YAG TC 相结合,分别在基于 TC 的白光 LED 和 LD 中获得了令人惊讶的 88 和 85.5 的 CRI 值。因此,Ce,Cr:LuAG TC 是一种极具前景的颜色转换器,适用于应用于一般照明和显示的大功率白光 LED/LD。

更新日期:2021-07-13
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