Ou Kai, Wang Yue, Zhang Wenting, Tang Yongliang, Ni Yuxiang, Xia Yudong, Wang Hongyan
School of Physical Science and Technology, Southwest Jiaotong University, Chengdu, Sichuan 610031, China.
ACS Omega. 2023 Dec 11;8(50):48326-48335. doi: 10.1021/acsomega.3c07694. eCollection 2023 Dec 19.
Recently, there have been reports of lead halide perovskite-based sensors demonstrating their potential for gas sensing applications. However, the toxicity of lead and the instability of lead-based perovskites have limited their applications. This study addressed this issue by developing a HS gas sensor based on a lead-free CsCuI film prepared using a one-step CVD method. The sensor demonstrated excellent sensing properties, including a high response and selectivity toward HS, even at low concentrations (0.2 ppm) at room temperature. Furthermore, a reasonable sensing mechanism was proposed. It is suggested that the sensing mechanism sheds light on the role of defects in perovskite materials, the impact of HS as an electron donor, and the occurrence of reversible chemical reactions. These findings suggest that lead-free CsCuI has great potential in the field of HS gas sensing.
最近，有报道称基于卤化铅钙钛矿的传感器在气体传感应用中展现出了潜力。然而，铅的毒性以及铅基钙钛矿的不稳定性限制了它们的应用。本研究通过采用一步化学气相沉积法制备的无铅CsCuI薄膜开发了一种HS气体传感器来解决这一问题。该传感器表现出优异的传感性能，即使在室温下低浓度（0.2 ppm）的HS环境中，也对其具有高响应和选择性。此外，还提出了一种合理的传感机制。有人认为，该传感机制揭示了钙钛矿材料中缺陷的作用、HS作为电子供体的影响以及可逆化学反应的发生。这些发现表明无铅CsCuI在HS气体传感领域具有巨大潜力。
