Stretchable organic electroluminescent devices with periodic regularly wrinkled structures

Abstract

The invention discloses a stretchable organic electroluminescent device with periodic regular wrinkle structure, which belongs to the field of optoelectronic technology. The invention specifically relates to processing a long-period grating structure on the surface of an elastic substrate by using a femtosecond laser ablation process, and combining a vacuum evaporation technology with a stripping process to obtain an organic electroluminescent device. The substrate is combined with the organic electroluminescent device to prepare a stretchable organic electroluminescent device with periodic regular wrinkles, high efficiency, high stability and large stretching degree. This kind of stretchable organic electroluminescent device has very high tensile stability. With the change of stretching degree, the photoelectric performance of the device has only slight fluctuations. More importantly, in repeated stretching tests, the device performance Only a small attenuation occurs and has very high practical value.

Description

technical field [0001] The invention belongs to the field of optoelectronic technology, and in particular relates to a stretchable organic electroluminescence device with periodic and regular wrinkle structure. Through the laser fixed-point programmable processing and preparation process, the device forms a regular wrinkle structure, and then solves the problem of stretchable device efficiency. The problem of a sharp drop in performance after low and multiple cycle stretching. [0002] technical background [0003] With the rapid development of information technology, people's requirements for electronic products are getting higher and higher. Traditional flat-panel devices based on hard materials such as silicon and glass can no longer meet people's needs. A new emerging technology called stretchable electronics Subject emerges as the times require, and more and more people pay attention to it. Compared with traditional devices, the outstanding feature of stretchable electr...

AI Technical Summary

Problems solved by technology

However, due to the limitation of light-emitting materials, device structure and surface morphology of ultra-thin substrates, the photoelectric performance of this stretchable light-emitting device is poor, and the luminous brightness and efficiency are very low.

At the same time, since the wrinkle morphology formed by ultra-thin devices is random and uncontrollable in the process of forming stretchable devices, resulting in poor mechanical stability, there is still a lot of room for optimization and improvement in this method.

[0007] Based on the above analysis, it can be found that due to the limitations of materials and preparation processes, there are no research results that can satisfy the three most important factors of elongation, efficiency and stability in the existing reports, and there are still many technical problems that need to be solved urgently.

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