Recently, with the support of the Beijing Science and Technology Commission, Professor Zou Dechun's research team at Peking University has made significant progress in fiber solar cell technology. By designing an innovative device structure, they have achieved a photoelectric conversion efficiency of 7.2%, setting a new benchmark for flexible fiber batteries. The newly developed battery, which is over 30 cm in length, can power a small propeller under natural light, demonstrating its practical potential.
In recent years, third-generation solar cell technologies, such as dye-sensitized and organic solar cells, have seen rapid development. However, their widespread application has been limited by the high cost of transparent conductive electrode materials and relatively low energy conversion efficiency. These challenges have hindered the commercialization of next-generation solar cells to some extent.
To address these issues, Professor Zou Dechun and his team introduced a novel approach: a flexible fiber solar cell that eliminates the need for transparent electrodes. Through continuous optimization of the fabrication process, they successfully created a 35cm x 35cm battery module. The team also developed flexible fiber electrodes and fiber cell units, enabling the production of double-sided fiber solar battery modules.
Furthermore, leveraging the unique three-dimensional light absorption properties of fiber-based systems, the researchers designed a new type of translucent condenser module. This innovation enhances the performance and versatility of the fiber solar cells. In addition, the project has advanced the automation of electrode film preparation, as well as key technologies in device assembly, packaging, electrode integration, and structural design for large-scale production.
The team has conducted fundamental research on improving both the efficiency and stability of these devices. Their work has overcome major challenges related to flexibility, scalability, modularity, and packaging in fiber batteries. These breakthroughs lay a solid foundation for future small-scale applications and further development in wearable and portable energy solutions.
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