Hybrid lead halide spin coated perovskite films have been successfully tested as portable, flexible, operated at room temperature, self-powered, and ultrasensitive ozone sensing elements. The electrical resistance of the hybrid lead mixed halide perovskite (CH₃NH₃PbI_3–xCl_x) sensing element, was immediately decreased when exposed to an ozone (O₃) environment and manage to recover its pristine electrical conductivity values within few seconds after the complete removal of ozone gas. The sensing measurements showed different response times at different gas concentrations, good repeatability, ultrahigh sensitivity and fast recovery time. To the best of our knowledge, this is the first time that a lead halide perovskite semiconductor material is demonstrating its sensing properties in an ozone environment. This work shows the potential of hybrid lead halide based perovskites as reliable sensing elements, serving the objectives of environmental control, with important socioeconomic impact.

中文翻译：

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溶液处理的CH ₃ NH ₃ PbI _{3– x} Cl _x钙钛矿型自供电臭氧感测元件，在室温下运行

混合卤化铅旋涂钙钛矿薄膜已成功测试为便携式，柔性，可在室温下运行，自供电和超灵敏的臭氧传感元件。混合铅混合卤化物钙钛矿（CH ₃ NH ₃ PbI _{3– x} Cl _x）传感元件的电阻在暴露于臭氧（O ₃）环境，并在完全去除臭氧气体后几秒钟内设法恢复其原始的电导率值。感测结果表明，在不同的气体浓度下，响应时间不同，重复性好，灵敏度高，恢复时间快。据我们所知，这是钙钛矿卤化物半导体材料首次在臭氧环境中展示其传感特性。这项工作显示了基于混合卤化铅的钙钛矿作为可靠的传感元件的潜力，可服务于环境控制的目标，并具有重要的社会经济影响。