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Full-color flexible laser displays based on random laser arrays

基于随机激光阵列的全色柔性激光显示

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Abstract

Flexible laser display is a critical component for an information output port in next-generation wearable devices. So far, the lack of appropriate display panels capable of providing sustained operation under rigorous mechanical conditions impedes the development of flexible laser displays with high reliability. Owing to the multiple scattering feedback mechanism, random lasers render high mechanical flexibility to withstand deformation, thus making them promising candidates for flexible display planes. However, the inability to obtain pixelated random laser arrays with highly ordered emissive geometries hinders the application of flexible laser displays in the wearable device. Here, for the first time, we demonstrate a mass fabrication strategy of full-color random laser arrays for flexible display panels. The feedback closed loops can be easily fulfilled in the pixels by multiple scatterings to generate durative random lasing. Due to the sustained operation of random laser, the display performance was well-maintained under mechanical deformations, and as a result, a flexible laser display panel was achieved. Our finding will provide a guidance for the development of flexible laser displays and laser illumination devices.

摘要

柔性激光显示是下一代可穿戴设备的重要组成部分. 到目前为止, 由于缺乏能够在机械条件下稳定工作的显示面板, 柔性激光显示的发展受到了阻碍. 随机激光器得益于多重反馈的工作机制可以承受机械变形, 是实现柔性激光显示面板的理想选择. 然而, 目前缺少一种通用的制备方法将随机激光器精确排布成高度有序的像素化矩阵. 为此我们提出了一种适用于柔性显示面板的全色随机激光阵列的构建策略. 在构建的微激光像素中, 多重散射可以提供持续的光学反馈回路, 使得随机激光可以稳定出射. 在机械变形下激光的性能也可以很好地保持, 从而实现高性能的柔性激光显示面板. 我们的构建策略将为柔性激光显示和激光照明设备的发展提供有益的参考.

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Acknowledgements

This work was financially supported by the Ministry of Science and Technology of China (2017YFA0204502), and the National Natural Science Foundation of China (21790364).

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Authors and Affiliations

  1. Key Laboratory of Photochemistry, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, China

    Yue Hou  (侯悦), Zhonghao Zhou  (周忠豪), Chunhuan Zhang  (张春焕), Ji Tang  (汤济), Yuqing Fan  (范宇晴), Fa-Feng Xu  (徐法峰) & Yong Sheng Zhao  (赵永生)

  2. University of Chinese Academy of Sciences, Beijing, 100049, China

    Yue Hou  (侯悦), Yuqing Fan  (范宇晴) & Yong Sheng Zhao  (赵永生)

Authors
  1. Yue Hou  (侯悦)
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  2. Zhonghao Zhou  (周忠豪)
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  3. Chunhuan Zhang  (张春焕)
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  4. Ji Tang  (汤济)
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  5. Yuqing Fan  (范宇晴)
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  6. Fa-Feng Xu  (徐法峰)
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  7. Yong Sheng Zhao  (赵永生)
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Contributions

Author contributions Zhao YS conceived the concept and planed the project. Zhao YS supervised the research. Hou Y designed and performed the experiments and prepared the materials. Hou Y, Zhou Z, Zhang C, Tang J, Fan Y and Xu FF carried out the optical measurements. Hou Y and Zhao YS analyzed the data and wrote the paper. All authors discussed the results and commented on the manuscript.

Corresponding author

Correspondence to Yong Sheng Zhao  (赵永生).

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Conflict of interest The authors declare that they have no conflict of interest.

Additional information

Yue Hou obtained her BSc degree from Lanzhou University in 2016. She is currently working on her PhD degree in Professor Zhao’s group at the Institute of Chemistry, Chinese Academy of Sciences (ICCAS). Her research interests are the photonic properties of micro/nanomaterials and their applications as miniaturized photonic devices.

Yong Sheng Zhao received his PhD degree in 2006 at ICCAS. After that, he joined the University of California at Los Angeles (UCLA) and Northwestern University as a postdoctoral fellow. In 2009, he returned to ICCAS as a professor of chemistry. His research interests include the controllable synthesis of low-dimensional organic materials, photophysical and photochemical processes, as well as the fabrication and performance optimization of photonic/optoelectronic devices.

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Hou, Y., Zhou, Z., Zhang, C. et al. Full-color flexible laser displays based on random laser arrays. Sci. China Mater. 64, 2805–2812 (2021). https://doi.org/10.1007/s40843-021-1664-0

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