Flexible wearable electronic is the future direction of the development of electronic components, the power is an important part of the power supply selection and design of future wearable electronic design and function.At present, the power of outdoor use of wearable electronics, large Area fit and security have greater restrictions.
In recent years, metal-organic hybrid perovskite solar cells for its superior photoelectric conversion properties have been widely concerned.Photosynthetic devices based on perovskite planar photoelectric conversion efficiency in a few short years made an important breakthrough, the highest efficiency of 22.1 %. Excellent optoelectronic properties for its application in wearable electronic devices may provide.But flexible perovskite solar cells have not yet been able to effectively applied to wearable electronic devices, to limit this development is due to the current flexible devices still exist a large area Poor reproducibility and bending performance degradation problem.
Supported by the National Natural Science Foundation of China, the Ministry of Science and Technology and the Chinese Academy of Sciences, Song Yanlin, a researcher at the Key Laboratory of Green Printing, Institute of Chemistry, Chinese Academy of Sciences, conducted an in-depth and systematic study on printing and preparing perovskite crystals and battery devices. In the ink-jet preparation of perovskite battery device made a breakthrough, compared with the traditional process to achieve a more environmentally friendly printing preparation methods in the inkjet printing perovskite single crystal material progress has been achieved to achieve the preparation of trichromatic perovskite luminescence Single crystal material.
Based on the above studies, the researchers found that interfacial layers in flexible perovskite devices have a great influence on the growth and stability of perovskite layers.Studies on the preparation of honeycomb-like nano-scaffolds by nano-assembly-printing methods can be used as a mechanical buffer Layer and optical resonator, so as to greatly improve the photoelectric conversion efficiency and mechanical stability of the flexible perovskite solar cells. The results show that the honeycomb-like nano-structure can effectively release the stress generated when the device is bent and act as a scaffold to induce the perovskite film Crystal structure.At the same time, the structure as an optical resonator can regulate the light-enrichment of the whole device to improve the light absorption efficiency of the device.With the introduction of honeycomb nano-scaffolds, the photoelectric conversion efficiency of the prepared perovskite solar cells reaches 12.32% Further research has found that the battery has excellent bending resistance and can be applied to flexible solar cell module, which has the advantages of high photoelectric conversion efficiency and stable performance, and can be widely applied to various wearable devices. Wearable electronic devices provide new ideas and methods, the research results published in Advanced M aterials magazine.
