ALEXANDRIA, Va., July 16 -- United States Patent no. 12,672,421, issued on June 30.
"Perovskite solar cell modified by chelating layer and its preparation method" was invented by Xiaoming Zhao (Nanjing City, China), Wanlin Guo (Nanjing City, China), Bingkun Tian (Nanjing City, China) and Zhuhua Zhang (Nanjing City, China).
According to the abstract* released by the U.S. Patent & Trademark Office: "The invention relates to a perovskite solar cell modified by a chelating layer and its preparation method, within the field of perovskite material preparation. The process involves spin-coating N, N'-bis(4-pyridyl)-1,4,5,8-naphthalenetetracarboxylic diimide (DPNDI) solution on the perovskite surface, followed by annealing. This modification form...