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Nano Research 2023, 16(9): 11893-11899 https://doi.org/10.1007/s12274-023-5731-x
Research Article | Issue | Published: 08 June 2023

Flexible high-resolution micro-LED display device with integrations of transparent, conductive, and highly elastic hydrogel

Show Author's Information Jiangwen Wang1,2,§,  Jianan Niu1,2,§,  Wei Sha1,2,  Xinhuan Dai1,2,  Tianci Huang1,3,  Qilin Hua1,2,  Yong Long1,2,  Junfeng Xiao4,  Weiguo Hu1,2,3,4( )
CAS Center for Excellence in Nanoscience, Beijing Key Laboratory of Micro-nano Energy and Sensor, Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences, Beijing 101400, China
School of Nanoscience and Technology, University of Chinese Academy of Sciences, Beijing 100049, China
Center on Nanoenergy Research, School of Physical Science and Technology, Guangxi University, Nanning 530004, China
School of Electronic Communication Technology Shenzhen Institute of Information Technology, Shenzhen 518172, China

§ Jiangwen Wang and Jianan Niu contributed equally to this work.

Keywords:
hydrogel, flexible, InGaN/GaN, micro light emitting diode (micro-LED)
Topics:
Light emitting diodes
Cite this article:
Wang J, Niu J, Sha W, et al. Flexible high-resolution micro-LED display device with integrations of transparent, conductive, and highly elastic hydrogel. Nano Research, 2023, 16(9): 11893-11899. https://doi.org/10.1007/s12274-023-5731-x
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Abstract Full text About this article

Computer vision techniques are real-time, immersive, and perceptual human-computer interaction technology. Excellent display effect, dynamic surface flexibility, and safe bio-adhesion are essential for various human–computer interaction applications, such as metaverse interfaces, skin-like sensors, and optoelectronic medical devices. However, realizing the flexible matching of inorganic optoelectronic devices and organisms remains a grand challenge for current display technologies. Here, we proposed a novel strategy by combining the optoelectronic advantages of inorganic micro light emitting diode (micro-LED) display and the extraordinary mechanical/biological compatibility of organic materials to overcome this challenge. A highly elastic (greater than 2000% strain), highly transparent (94% visible light transmittance), biocompatible conductive hydrogel composite electrode layer was fabricated. For the first time, we realized the on-chip electrical interconnection of 4900 LED units to form a blue-green light display patch with high resolution (264 PPI), low power consumption (4.4 mW) and adaptive surface attachment. This work demonstrates an integrated scheme and potential applications of flexible high-resolution microdisplays, such as wearable full-color micro-LED smart curved display devices and conformable biomedical monitoring systems.


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About this article

Flexible high-resolution micro-LED display device with integrations of transparent, conductive, and highly elastic hydrogel

Show Author's information Jiangwen Wang1,2,§, Jianan Niu1,2,§, Wei Sha1,2, Xinhuan Dai1,2, Tianci Huang1,3, Qilin Hua1,2, Yong Long1,2, Junfeng Xiao4, Weiguo Hu1,2,3,4( )
CAS Center for Excellence in Nanoscience, Beijing Key Laboratory of Micro-nano Energy and Sensor, Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences, Beijing 101400, China
School of Nanoscience and Technology, University of Chinese Academy of Sciences, Beijing 100049, China
Center on Nanoenergy Research, School of Physical Science and Technology, Guangxi University, Nanning 530004, China
School of Electronic Communication Technology Shenzhen Institute of Information Technology, Shenzhen 518172, China

§ Jiangwen Wang and Jianan Niu contributed equally to this work.

Abstract

Computer vision techniques are real-time, immersive, and perceptual human-computer interaction technology. Excellent display effect, dynamic surface flexibility, and safe bio-adhesion are essential for various human–computer interaction applications, such as metaverse interfaces, skin-like sensors, and optoelectronic medical devices. However, realizing the flexible matching of inorganic optoelectronic devices and organisms remains a grand challenge for current display technologies. Here, we proposed a novel strategy by combining the optoelectronic advantages of inorganic micro light emitting diode (micro-LED) display and the extraordinary mechanical/biological compatibility of organic materials to overcome this challenge. A highly elastic (greater than 2000% strain), highly transparent (94% visible light transmittance), biocompatible conductive hydrogel composite electrode layer was fabricated. For the first time, we realized the on-chip electrical interconnection of 4900 LED units to form a blue-green light display patch with high resolution (264 PPI), low power consumption (4.4 mW) and adaptive surface attachment. This work demonstrates an integrated scheme and potential applications of flexible high-resolution microdisplays, such as wearable full-color micro-LED smart curved display devices and conformable biomedical monitoring systems.

Keywords: hydrogel, flexible, InGaN/GaN, micro light emitting diode (micro-LED)

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Publication history
Copyright
Acknowledgements

Publication history

Received: 12 January 2023
Revised: 10 April 2023
Accepted: 11 April 2023
Published: 08 June 2023
Issue date: September 2023

Copyright

© Tsinghua University Press 2023

Acknowledgements

Acknowledgements

The authors thank for the support from the National Natural Science Foundation of China (Nos. 52173298, 61904012, and 52192611), the National Key R&D Program of China (No. 2021YFA1201603), and the Fundamental Research Funds for the Central Universities.

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