Self-healing stretchable light-emitting device and preparation method thereof

Abstract

The invention belongs to the intelligent electronic device technical field and relates to a self-healing stretchable light-emitting device and a preparation method thereof. The method of the inventionincludes the following steps that: a light-emitting active layer having a self-healing function and a transparent electrode are prepared by using transparent self-healing polyurethane elastomer as amatrix material; the light-emitting active layer is made of electroluminescent powder, and the unique dispersion structure of the electroluminescent powder allows the healing of the light-emitting layer to be achieved by the healing of the self-healing matrix; and the electrode is made of an oriented carbon nanotube array, and a pre-stretching method is used to make the electrode material have a wrinkle structure when the electrode is in an un-stretched state, such kind of structure can ensure the stability of the resistance of the device during a stretching process, and the interaction of Vander Waals' forces between carbon nanotubes allow the conductivity of the electrode to be better restored. The maximum brightness of the device can achieve 121.2 cd / m<2>; the maximum stretching quantity of the device can achieve 400%; the stability of the device is excellent when the device is stretched cyclically under 200% of strain; and the device can withstand 10 times of cutting and can be finally healed each time with the brightness of the device not attenuated.

Description

technical field [0001] The invention belongs to the technical field of intelligent electronic devices, and in particular relates to a self-healing stretchable light-emitting device and a preparation method thereof. Background technique [0002] As a new generation of electronic devices, wearable devices have advantages such as light weight, flexibility, high integration and multifunctionality. Wearable devices usually need to withstand complex deformations such as twisting, collision, scratching or tearing during use. In order to avoid irreversible damage and prolong device lifetime, researchers have developed a series of self-healing devices based on self-healing materials. Display devices are the only way for information transmission and human-computer interaction, and play an important role in the field of wearable devices. A large number of researches have been carried out around flexible and stretchable light-emitting display devices. As far as we know, the most widel...

AI Technical Summary

Problems solved by technology

As far as we know, the most widely used organic light-emitting diodes currently have very high requirements for the flatness of the film layer. It is inorganic and difficult to heal

In addition, its functional layer is only nanometer-scale thick, and it is almost impossible to make good and precise interfacial contact when it is necessary to achieve healing.

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