Highly-sensitive and stable ozone and hydrogen sensing elements were fabricated based on well-crystalline rounded cube-shaped CsPbBr₃ microcrystals, synthesized by a facile solution process performed under ambient conditions. It is shown that such elements demonstrate enhanced room temperature gas sensing ability compared to the previously reported metal halide and oxide-based ones. Electrical measurements performed on these sensing components revealed high sensitivity to ultra-low ozone and hydrogen concentrations, namely 4 ppb and 1 ppm respectively, as well as a remarkable repeatability, even after a few months of storage in ambient conditions. Both ozone and hydrogen sensors were self-activated, as they did not require the use of UV or heating external stimuli to operate, and exhibited fast detection and short restoration times. All such attractive properties along with the simple fabrication process could provide an easy, efficient and low-cost technology for the realization of future gas sensing devices.

高灵敏度和稳定的臭氧和氢气传感元件是基于良好的结晶圆角立方体形状的 CsPbBr _3制造的微晶，通过在环境条件下进行的简便溶液法合成。结果表明，与先前报道的金属卤化物和氧化物基元素相比，这些元素表现出增强的室温气体传感能力。对这些传感组件进行的电气测量显示，即使在环境条件下存储几个月后，它们对超低臭氧和氢浓度（分别为 4 ppb 和 1 ppm）也具有很高的灵敏度，并且具有显着的可重复性。臭氧和氢气传感器都是自激活的，因为它们不需要使用紫外线或加热外部刺激来操作，并且表现出快速检测和短恢复时间。所有这些吸引人的特性以及简单的制造过程都可以提供一种简单的、