Self-healable electroluminescent devices

Guojin Liang; Zhuoxin Liu; Funian Mo; Zijie Tang; Hongfei Li; Zifeng Wang; Venkateshwarlu Sarangi; Abhijit Pramanick; Jun Fan; Chunyi Zhi

doi:10.1038/s41377-018-0096-8

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Self-healable electroluminescent devices

Original Articles

- Self-healable electroluminescent devices
- Light: Science & Applications Vol. 7, Issue 6, Pages: 977-987(2018)
- Affiliations：
  
  1.Department of Materials Science and Engineering, City University of Hong Kong, 83 Tat Chee Avenue, Kowloon, China
  2.Shenzhen Research Institute, City University of Hong Kong, High-Tech Zone, Nanshan District, Shenzhen, 518057, China
- Author bio：
  
  Jun Fan (junfan@cityu.edu.hk)
  Chunyi Zhi (cy.zhi@cityu.edu.hk)
- Funds：
- DOI：10.1038/s41377-018-0096-8
  CLC：
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Liang, G. J. et al. Self-healable electroluminescent devices. Light: Science & Applications, 7, 977-987 (2018).
DOI：

Liang, G. J. et al. Self-healable electroluminescent devices. Light: Science & Applications, 7, 977-987 (2018). DOI： 10.1038/s41377-018-0096-8.

摘要

Abstract

Electroluminescent (EL) devices have been extensively integrated into multi-functionalized electronic systems in the role of the vitally constituent light-emitting part. However, the lifetime and reliability of EL devices are often severely restricted by concomitant damage, especially when the strain exceeds the mechanical withstanding limit. We report a self-healable EL device by adopting a modified self-healable polyacrylic acid hydrogel as the electrode and a self-healable polyurethane as a phosphor host to realize the first omni-layer-healable light-emitting device. The physicochemical properties of each functionalized layer can be efficiently restored after experiencing substantial catastrophic damage. As a result, the luminescent performance of the self-healable EL devices is well recovered with a high healing efficiency (83.2% for 10 healing cycles at unfixed spots, and 57.7% for 20 healing cycles at a fixed spot). In addition, inter-device healing has also been developed to realize a conceptual "LEGO"-like assembly process at the device level for light-emitting devices. The design and realization of the self-healable EL devices may revive their performance and expand their lifetime even after undergoing a deadly cut. Our self-healable EL devices may serve as model systems for electroluminescent applications of the recently developed ionically conductive healable hydrogels and dielectric polymers.

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references

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