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>> Layer of nanoparticles could improve LED performance and lifetime

Abstract:
Adding a layer of nanoparticles to LED designs could help them produce more light for the same energy, and also increase their lifetime.

纳米粒子层可提高LED性能和寿命

London, UK | Posted on August 7th, 2020

This is according to a team from Imperial College London and the Indian Institute of Technology (IIT) Guwahati who have found a new way to boost the amount of light LEDs produce. They report their innovation in the journal Light Science & Applications.

制作发光二极管(LED)光源的更有效和更持久的将意味着它们使用较少的能量,从而降低其电力使用对环境的影响。LED在广泛的应用中使用,从交通灯和背光用于电子显示器,智能电话,大型户外屏幕,和一般的装饰照明,以感测,水净化,和感染的表面的去污。

球队建模的LED芯片,其产生的光之间的纳米颗粒的放置的二维(单层)的影响,并保护所述芯片的透明壳体。虽然套管是必要的,它可以使从LED芯片发射的光的不必要的反射,这意味着不是所有的光逸出。

They found that adding a layer of finely tuned nanoparticles could reduce these reflections, allowing up to 20 percent more light to be emitted. The reflections also increase the heat inside the device, degrading the LED chip faster, so reducing the reflections could also reduce the heat and increase the lifetime of LED chips.

合着者Debabrata Sikdar博士从IIT高哈蒂,前身是欧洲联盟委员会玛丽·居里夫人研究员帝国评论说:“尽管仍有改进的外壳已经被先前建议,最使LED体积更大或更难以制造,减少对经济的影响的提高。

"We think that our innovation, based on fundamental theory and the detailed, balanced optimization analysis we performed, could be introduced into existing manufacturing processes with little disruption or added bulk."

合著者,教授彭德瑞爵士from the Department of Physics at Imperial, said: "The simplicity of the proposed scheme and the clear physics underpinning it should make it robust and, hopefully, easily adaptable to the existing LED manufacturing process.

"It is obvious that with larger light extraction efficiency, LEDs will provide greater energy savings as well as longer lifetime of the devices. This will definitely have a global impact on the versatile LED-based applications and their multi-billion-dollar market worldwide."

合着者阿列克谢Kornyshev教授,从化学系帝国,说:“预测效果是在界面与纳米粒子阵列的各种光子影响的系统理论发展的结果,应用和早期的背景下实验测试报道切换镜窗口,可调谐色反射镜和滤光器“。

The next stage for the research will be manufacturing a prototype LED device with a nanoparticle layer, testing the best configurations predicted by the theory - including the size, shape, material and spacing of the nanoparticles, and how far the layer should be from the LED chip.

The authors believe that the principles used can work along with other existing schemes implemented for enhancing light extraction efficiency of LEDs. The same scheme could also apply to other optical devices where the transmission of light across interfaces is crucial, such as in solar cells.

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联系方式:
Hayley Dunning

020-759-42412

@imperialspark

Copyright © Imperial College London

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