A novel strategy for suppressing blue light hazards of white light-emitting diodes by using transparent bamboo

IF 3.3 3区物理与天体物理 Q2 OPTICS Journal of Luminescence Pub Date : 2024-10-17 DOI:10.1016/j.jlumin.2024.120942

Yaling Chai , Xiaorong Yin , Ziquan Guo , Zhong Chen , Caichao Wan

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Abstract

- Light-emitting diode (LED) has become the most popular lighting device in the world, but the harm of blue light brought by LEDs still remains a very important problem. The natural bamboo possesses a unique hierarchical structure and can be treated as an optical management material applied in the photoelectric device after the treatment of lignin removal or lignin modification. In this paper, we have discovered that the blue light hazards of white LEDs can be effectively suppressed after introducing the transparent bamboo (TB) based on above treatment. Five types of white LEDs are adopted for performing this study, and more than 27 % decrease of blue light hazard efficiency can be found after covering the TB processed by lignin modification and polymer impregnation, although more or less optical loss happens. This fact may be attributed to different light scattering effects of TB in the blue band and others in the visible range. After that, the circadian effects of two types of white LEDs (warm white and neutral white) while the TB is covered on them are also discussed. This work provides an effective method for suppressing blue light hazards, regulating circadian effects, and maintaining the color performance of LED lighting as much as possible.

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利用透明竹子抑制白光发光二极管蓝光危害的新策略

- 发光二极管（LED）已成为世界上最流行的照明设备，但 LED 带来的蓝光危害仍是一个非常重要的问题。天然竹子具有独特的层次结构，经过木质素去除或木质素改性处理后，可作为光电管理材料应用于光电器件中。本文发现，在上述处理的基础上，引入透明竹材（TB）后，可有效抑制白光 LED 的蓝光危害。本研究采用了五种类型的白光 LED，发现在覆盖经过木质素改性和聚合物浸渍处理的透明竹材后，蓝光危害效率降低了 27%以上，但或多或少会出现光学损失。这可能是由于 TB 在蓝光波段和其他可见光波段的光散射效应不同所致。随后，还讨论了在两种白光 LED（暖白光和中性白光）上覆盖 TB 时的昼夜效应。这项研究为抑制蓝光危害、调节昼夜节律效应和尽可能保持 LED 照明的色彩性能提供了一种有效的方法。

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来源期刊

Journal of Luminescence 物理-光学

CiteScore

6.70

自引率

13.90%

发文量

850

审稿时长

3.8 months

期刊介绍： The purpose of the Journal of Luminescence is to provide a means of communication between scientists in different disciplines who share a common interest in the electronic excited states of molecular, ionic and covalent systems, whether crystalline, amorphous, or liquid. We invite original papers and reviews on such subjects as: exciton and polariton dynamics, dynamics of localized excited states, energy and charge transport in ordered and disordered systems, radiative and non-radiative recombination, relaxation processes, vibronic interactions in electronic excited states, photochemistry in condensed systems, excited state resonance, double resonance, spin dynamics, selective excitation spectroscopy, hole burning, coherent processes in excited states, (e.g. coherent optical transients, photon echoes, transient gratings), multiphoton processes, optical bistability, photochromism, and new techniques for the study of excited states. This list is not intended to be exhaustive. Papers in the traditional areas of optical spectroscopy (absorption, MCD, luminescence, Raman scattering) are welcome. Papers on applications (phosphors, scintillators, electro- and cathodo-luminescence, radiography, bioimaging, solar energy, energy conversion, etc.) are also welcome if they present results of scientific, rather than only technological interest. However, papers containing purely theoretical results, not related to phenomena in the excited states, as well as papers using luminescence spectroscopy to perform routine analytical chemistry or biochemistry procedures, are outside the scope of the journal. Some exceptions will be possible at the discretion of the editors.