Chalcohalide Antiperovskite Thin Films with Visible Light Absorption and High Charge-Carrier Mobility Processed by Solvent-Free and Low-Temperature Methods

Silver chalcohalide antiperovskites represent a ratherunexploredalternative to lead halide perovskites and other semiconductors basedon toxic heavy metals. All synthetic approaches reported so far forAg(3)SI and Ag3SBr require long synthesis times(typically days, weeks, or even months) and high temperatures. Herein,we report the synthesis of these materials using a fast and low-temperaturemethod involving mechanochemistry. Structural and optical propertiesare examined experimentally and supported by first-principles calculations.Furthermore, we deposit Ag3SI as thin films by pulsed laserdeposition and characterize its optoelectronic properties using optical-pump-terahertz-probemeasurements, revealing a high charge-carrier mobility of 49 cm(2) V-1 s(-1). This work pavesthe way to the implementation of chalcohalide antiperovskites in variousoptoelectronic applications. ; The research leading to these results has received funding from the European Research Council (ERC) under the European Union’s Horizon 2020 research and innovation programme (grant agreement no. 834431). The authors acknowledge support from the Comunitat Valenciana (IDIFEDER/2018/ 061, GV/2021/027, PROMETEU/2020/077, and CISEJI/ 2022/43), as well as by the Ministry of Science and Innovation (MCIN) and the Spanish State Research Agency (AEI) (projects PID2020-119748GA-I00, PID2021-128569NB-I00, and CEX2019-000919-M, funded by MCIN/AEI/10.13039/ 501100011033 and by “ERDF A way of making Europe”, project TED2021-131255B−C44 funded by MCIN/AEI/ 10.13039/501100011033 and by European Union NextGenerationEU/PRTR, grants RYC-2016-21316 and RYC2020- 028803-I funded by MCIN/AEI/10.13039/501100011033 and “ESF Investing in your future”). Dutch Research Council (NWO, FOM Focus Group “Next Generation Organic Photovoltaics”). P.S. thanks the Spanish Ministry of Universities for her predoctoral grant (FPU18/01732 and EST19/ 00295). A.S.M. and M.M.M. acknowledge the financial support of the NWO StartUp 2019 project BRIDGE (project number: STU.019.026). M.R. and ...