Scientists from China’s Liaocheng University and Hefei University of Technology have developed a new gas-solid process for the creation of perovskite thin films, which may lead to improved stability of perovskite-based solar cells.
The researchers noted that solvent based processes, the most common method for growing perovskite crystals on a substrate, often leads to defects and irregularities in the perovskite film, making it extremely sensitive to moisture and likely to decompose quickly under working conditions. So they suggested an alternative to using solvents, working on a gas-solid reaction process. Further details of the process itself were not provided, however the team states that crystals grown this way, and annealed at 120∘C for 30 minutes exhibited higher responsivity and detectivity than devices previously developed using solution based methods.
The paper showed that the gas-solid method gave full coverage with a high rate of crystallization, as well as good stability after storage in air for two months.