Chinese scientists invented fibrous polymer light-emitting electrochemical cells

Wearable electronic devices can not only emit light, but also change the color? This cool and fashionable light-emitting wearable electronic device is expected to become a reality in the near future. The reporter learned that the Peng Huisheng Research Group of the State Key Laboratory of Molecular Engineering of Polymer Science and Engineering of the Department of Polymer Science and Technology of Fudan University has now developed a new type of fibrous polymer light emitting electrochemical cell. This breakthrough research is a wearable fibrous light emitting device. The development brings "light". The relevant research results were published on the 23rd in the international top journal "Natural Photonics."

In recent years, wearable electronic devices have been widely used in many fields such as microelectronics, biomedicine, transportation, and aerospace. With the continuous development of wearable fibrous energy devices, flexibility, light weight, and convenience can no longer satisfy people's imagination for wearable electronic devices. How to make wearable electronic devices not only "beautiful to use" but also "looks more beautiful", and researchers continue to research and develop the wearable fibrous light-emitting devices.

After more than three years of painstaking research, Peng Huisheng's research group has developed a fibrous polymer light-emitting electrochemical cell for the first time in the world through a low-cost solution method. The research group first uniformly adsorbed the zinc oxide nanoparticles and the polymer light-emitting layer on the steel wire, and then uniformly wrapped a layer of high-conductivity oriented carbon nanotube film on the outer surface of the polymer light-emitting layer as a transparent electrode and finally obtained a fibrous shape. Polymer light emitting electrochemical cells.

Traditional light emitting devices mainly include organic small molecular light emitting diodes and polymer light emitting diodes. Compared with traditional light-emitting diodes, the first author of the paper, Zhang Zhitao of the Department of Macromolecular Science at Fudan University, said that fibrous polymer light-emitting electrochemical cells have unique advantages, such as lower operating voltage and higher electron/ Photon conversion efficiency and higher power efficiency. “More importantly, compared with organic light-emitting diodes, polymer light-emitting electrochemical cells require less surface roughness on the electrode material, which will facilitate large-scale production.”

It is understood that fibrous polymer light emitting electrochemical cells can achieve 360-degree luminescence. If different colors of light-emitting polymers are integrated onto one fiber, it is also possible to emit different colors of light simultaneously on one fiber. Peng Huisheng told reporters that the study also found that these light-emitting fibers also have good flexibility, can be knitted into a flexible fabric and various patterns, the different colors of the fiber together, by controlling the brightness ratio of the light-emitting fibers, but also to achieve composite The effective regulation of light color.

The reviewer of Nature-Photonics stated that for many years people have been eager to develop wearable luminescent fibers, but this has not been achieved and this research has achieved a breakthrough. It is reported that the research group will further improve the device performance and lay the foundation for large-scale industrial production of light-emitting wearable electronic devices.