Recently, the research team led by Professors Yiwang Chen and Xiaotian Hu from the College of Chemistry and Chemical Engineering / Institute of Polymer and Energy Chemistry at Nanchang University has made a significant breakthrough in the field of next-generation thin-film solar cells. Their work, titled “Laser annealing enables rapid, degradation-free ambient processing of perovskite solar modules,” has been published in the top international journal Science. The team has innovatively proposed and realized an air-processed laser annealing technique, providing a key technological pathway for the scalable, low-cost and high-stability fabrication of perovskite photovoltaic materials.

This research was led by Nanchang University in collaboration with several partner institutions. Zhaoyang Chu, a PhD student at Nanchang University, and Baojin Fan, PhD from Jiangxi Normal University, are the co-first authors. Professors Yiwang Chen, Xiaotian Hu, and Dr. Hongxiang Li are the co-corresponding authors.

Perovskite solar cells offer high power-conversion efficiency and solution-processability, but conventional thermal annealing requires long processing times in inert atmospheres. Through in-situ synchrotron characterization, the team revealed for the first time a four-stage degradation mechanism of perovskite films in air, and identified an approximately 123-second “no-degradation window.” Based on this discovery, they developed a high-power blue-laser annealing process capable of achieving rapid, large-area crystallization within about 20 seconds, effectively avoiding water- and oxygen-induced degradation.

This achievement provides a high-throughput, low-energy and environmentally friendly fabrication strategy for perovskite photovoltaics, and is expected to accelerate the transition of high-efficiency photovoltaic materials from laboratory research to industrial application in China. The study was supported by the National Key R&D Program of China, the National Natural Science Foundation of China, and the Jiangxi Provincial Natural Science Foundation.

论文链接：https://www.science.org/doi/10.1126/science.adx9650