Foreign Media: Chinese Scientists Break 34.2% Efficiency in Perovskite Solar Cells, Achieving a Key Technological Leap

A Chinese research team has made a major breakthrough in the field of perovskite solar cells, successfully developing a new type of dual-radical self-assembled molecular material. This material significantly improves the efficiency and stability of perovskite solar cells, providing key technical support for the development of clean energy.

The research was completed by a team from the Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, and has been published in the prestigious international journal "Science."

Perovskite solar cells are considered an important direction in photovoltaic technology due to their theoretical conversion efficiency of up to 26%, low cost, and solution-processability. However, traditional hole transport layers face issues such as high production costs and poor thermal stability, which have hindered their industrialization.

The research team innovatively designed a shell-opening dual-radical self-assembled molecule, with a spin concentration nearly 1000 times higher than that of traditional materials, effectively suppressing molecular stacking. Test data show that the carrier transport rate of the new material is more than twice that of traditional materials and exhibits excellent stability. Solar cells based on this material have set multiple world records: small-area devices achieved a conversion efficiency of 26.3%, micro-components reached 23.6%, and perovskite-silicon tandem cells exceeded 34.2%. After continuous operation for 1000 hours, the device performance degradation rate was less than 1%, far exceeding that of international counterparts.

This breakthrough provides a revolutionary material solution for perovskite solar cells, accelerating China's industrialization process in new photovoltaic technologies in this field.

Original article: https://www.toutiao.com/article/1836595498054664/

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