Researchers at the Hefei Institutes of Physical Science obtained excellent performance of perovskite solar cells (or PSCs) by excimer laser.

Several problem hinder the progress of PSCs. For example, surface defects decrease their performance, and the preparation process of the common ETL of PSCs requires annealing and crystallization at 400 – 500 °C, which exceeds the temperature that the common flexible substrates can withstand, and restricts the development of flexible PSCs. To address the above problems, scientists introduced excimer laser into the research of perovskite solar cells (PSCs).

Through the study, they obtained low temperature excimer laser annealing (ELA) of gallium doped zinc oxide (GZO) electron transport layer (ETL) and rapid excimer laser surface modification (ELSM) of CH3NH3PbI3 films.

These works were completed by Prof. FANG Xiaoming's study team with Anhui Institute of Optics and Fine Mechanics (AIOFM), Hefei Institutes of Physical Science.