Abstract
AbstractSn‐based perovskites are the most promising alternative materials for Pb‐based perovskites to address the toxicity problem of lead. However, the development of SnII‐based perovskites has been hindered by their extreme instability. Here, we synthesized efficient and stable lead‐free Cs4SnBr6 perovskite by using SnF2 as tin source instead of easily oxidized SnBr2. The SnF2 configures a fluorine‐rich environment, which can not only suppress the oxidation of Sn2+ in the synthesis, but also construct chemically stable Sn−F coordination to hinder the electron transfer from Sn2+ to oxygen within the long‐term operation process. The SnF2‐derived Cs4SnBr6 perovskite shows a high photoluminescence quantum yield of 62.8 %, and excellent stability against oxygen, moisture, and light radiation for 1200 h, representing one of the most stable lead‐free perovskites. The results pave a new pathway to enhance the optical properties and stability of lead‐free perovskite for high‐performance light emitters.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
