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![](https://wqketang.oss-cn-beijing.aliyuncs.com/zip-unzip/zip-c58e4bc2-df25-4fad-8e97-07b49fb873f8/nr-9-3-692/files/nr-9-3-692-FE1.jpg?Expires=1725761105&OSSAccessKeyId=STS.NTrjfJwvjPeeUmXHZiwKKKeHs&Signature=CPY3L6PN4I7kc8WeLOKxxFmG%2FLI%3D&security-token=CAISywJ1q6Ft5B2yfSjIr5fHIdz%2BmqlL56eOV0vprFo8e8RnpKDjkTz2IHtKenhsBOsbtfk1mG5W5%2FgZlqJ9SptIAEfJa9d99MzpL6NEltCT1fau5Jko1beHewHKeTOZsebWZ%2BLmNqC%2FHt6md1HDkAJq3LL%2Bbk%2FMdle5MJqP%2B%2FUFB5ZtKWveVzddA8pMLQZPsdITMWCrVcygKRn3mGHdfiEK00he8TouufTinpHMskGA1Aell7Mvyt6vcsT%2BXa5FJ4xiVtq55utye5fa3TRYgxowr%2Fwo0v0YpGya5YzHXwcPskvdKZbo78UqLQlla6w%2BGqFJqvPxr%2Fp8t%2Fx5fWJKAezhVgs8cVM8JOjIqKOscIsi5si66lGqFV55c8Fdm%2BgUooJVgIMhTnduUfAPJAGOxzJitP%2BUVGGphr60TEnBL4rB5MUctfzRp2mfxS7UTzDnGoABH6jgXBzsc%2BQKWLkDyn6%2BN2jvHyt9Pf4QN3K8aipTqrZ6Ni52W0jIng%2B8kv95K2CyTU1Prjl6A7NToYs1H87Lkl6EiADV4GWwOaRd%2FMsU27VcJBqoQ0BNDBEpoanVHTmRWqVWR6KBRsOULlPuOVELaUcwSImAOeQh3yZxqvtbSMAgAA%3D%3D)
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Methylammonium bismuth (Ⅲ) iodide single crystals and films have been developed and investigated. We have further presented the first demonstration of using this organic–inorganic bismuth-based material to replace lead/tin-based perovskite materials in solution-processable solar cells. The organic–inorganic bismuth-based material has advantages of non-toxicity, ambient stability, and low-temperature solution-processability, which provides a promising solution to address the toxicity and stability challenges in organolead- and organotin-based perovskite solar cells. We also demonstrated that trivalent metal cation-based organic–inorganic hybrid materials can exhibit photovoltaic effect, which may inspire more research work on developing and applying organic-inorganic hybrid materials beyond divalent metal cations (Pb (Ⅱ) and Sn (Ⅱ)) for solar energy applications.
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