Journal
SENSORS AND ACTUATORS A-PHYSICAL
Volume 351, Issue -, Pages -Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.sna.2023.114153
Keywords
Cs2TeCl6; Perovskite; Humidity sensors; Interfaces
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A lead-free halide perovskite Cs2TeCl6 sensor with high humidity sensing performance, including ultra-high response value (1.59 x 106) and fast response time (1 s), was synthesized and discussed. It also demonstrates good reliability and long-term stability in the operating range of relative humidity (RH) from 11% to 97%. This work provides guidance for the application of lead-free halide perovskites in electronic sensory devices.
Lead halide perovskites have attracted extensive attention in lately because of the high cost-effectiveness, simple manufacturing process and adjustable properties. However, lead halide perovskites are rarely used in humidity sensors due to the toxicity and instability. In this work, we synthesized an all-inorganic lead-free halide perovskite Cs2TeCl6 for humidity detection. The Cs2TeCl6 sensor represents high humidity sensing performance in an impedimetric mode, especially ultra-high response value (1.59 x 106) and fast response time (1 s). Moreover, the Cs2TeCl6 sensor also displays good reliability and long-term stability in the operating range of relative humidity (RH) from 11% to 97%. In addition, the humidity sensing mechanism was discussed by impedance analysis. This work provides a feasible guidance for lead-free halide perovskites in electronical sensory devices.
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