One-pot synthesis of dispersible thermally stable organic downconversion materials under DBU catalyzation for high performance hybrid-LED lamps,Green Chemistry

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One-pot synthesis of dispersible thermally stable organic downconversion materials under DBU catalyzation for high performance hybrid-LED lamps
Green Chemistry ( IF 9.3 ) Pub Date : 2018-06-25 , DOI: 10.1039/c8gc01390j
Junjie He _{1,

2,

3,

4,

5} , Shixing Yang _{5,

6,

7,

8} , Kai Zheng _{1,

2,

3,

4,

5} , Youming Zhang _{1,

2,

3,

4,

5} , Jun Song _{1,

2,

3,

4,

5} , Junle Qu _{1,

2,

3,

4,

5}

Affiliation

The lighting market has been dominated by light emitting diodes (LEDs), which not only need Ga for wafer production, but also consume abundant non-sustainable rare-earth elements such as Y, Ce and Eu. Hybrid-LED technology using organic downconversion materials (ODMs) is a promising candidate technology to save the rare-earth elemental resources. However, it is still a challenge to fabricate hybrid-LED devices with a high color rendering index (CRI), lumen efficiency and long lifetime at the same time. Herein, highly dispersible perylene diimides are synthesized in short routes and dispersed into a polymer matrix at high temperature to produce low cost light ODMs. Cold to warm white LED lamps with a CRI up to 92 can be fabricated with the ODMs. In particular, a warm white lamp with the same high CRI and efficiency up to 82 lm W⁻¹ is obtained. It is comparable to all inorganic warm white LEDs with such a high CRI. By applying our OMDs, an approach for highly efficient yellow LED lamps, which can improve efficiency by 66% to 153 lm W⁻¹ compared with the present method, is illustrated. More importantly, incorporating a remote phosphor configuration (RPC) effectively improves the lifetime of ODMs superior to 2870 h, extrapolated to 6000 h maintaining 70% of the original fluorescence efficiency after continuous operation in an ambient environment. This approach could be a quite simple protocol paving the way for the practical application of hybrid-LED lamps.

中文翻译：

在DBU催化下一锅合成高性能热稳定有机可分散的有机下转换材料

照明市场一直由发光二极管（LED）占据主导地位，不仅需要Ga来生产晶片，而且还会消耗大量不可持续的稀土元素，例如Y，Ce和Eu。使用有机下转换材料（ODM）的混合LED技术是节省稀土元素资源的有前途的候选技术。然而，同时制造具有高显色指数（CRI），流明效率和长寿命的混合LED器件仍然是一个挑战。在此，以短路径合成高度分散的per二酰亚胺，并在高温下分散到聚合物基质中以生产低成本的轻型ODM。可以使用ODM制造CRI高达92的冷至暖白色LED灯。特别是具有相同的高CRI和高达82 lm W的效率的暖白灯获得^-1。它可与所有具有如此高CRI的无机暖白LED媲美。通过应用我们的OMD，说明了一种高效黄色LED灯的方法，与本方法相比，该方法可以将效率提高66％，达到153 lm W^-1。更重要的是，结合远程磷光体配置（RPC）可有效延长ODM的寿命，优于2870小时，外推至6000小时，可在环境环境中连续运行后保持原始荧光效率的70％。这种方法可能是一个非常简单的协议，为混合LED灯的实际应用铺平了道路。

更新日期：2018-07-30

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