The Rb₂CO₃-decorated In₂O₃ sensor is prepared for detection of NO₂ at room temperature under light irradiation. Physical and chemical properties of the materials and structures are thoroughly investigated by various analytical tools of scanning electron microscopy, transmission electron microscopy, X-ray diffraction, X-ray photoelectron spectroscopy, and Raman spectroscopy, thereby confirming the formation of the Rb₂CO₃/In₂O₃ p-n junction at the interface. The Rb₂CO₃-decoration effect on In₂O₃ sensor is examined under light irradiation of different wavelengths and intensities. Rb₂CO₃-decoration exhibits much higher sensing performance than pure In₂O₃ sensor, and furthermore, the visible light irradiation improves in the response level and sensing kinetics. The sensor detects less than 100 ppb NO₂. In addition, the Rb₂CO₃-decorated In₂O₃ sensor shows high selectivity, stability, repeatability, and linearity. The ultimate performance of the nanostructured sensor is elucidated by the depletion model of the conduction type gas sensors. The effect of humidity on the sensing performance is also investigated.

制备装饰有Rb ₂ CO _3的In ₂ O ₃传感器，用于在室温下在光照射下检测NO ₂。通过扫描电子显微镜，透射电子显微镜，X射线衍射，X射线光电子能谱和拉曼光谱等各种分析工具对材料和结构的物理和化学性质进行了彻底研究，从而确认了Rb ₂ CO ₃的形成。/ In ₂ O ₃ pn结在接口处。Rb ₂ CO ₃对In ₂ O _3的装饰作用在不同波长和强度的光照射下检查传感器。与纯In ₂ O ₃传感器相比，Rb ₂ CO ₃装饰表现出更高的传感性能，此外，可见光辐照改善了响应水平和传感动力学。传感器检测到的NO ₂小于100 ppb 。此外，Rb ₂ CO ₃装饰的₂ O ₃传感器显示出高选择性，稳定性，可重复性和线性。传导型气体传感器的耗竭模型阐明了纳米结构传感器的最终性能。还研究了湿度对传感性能的影响。