Ultrahigh Response Humidity Sensor Based on Lead-Free Cs2SnCl6 Perovskite Films

The humidity sensor based on quartz crystal microbalance (QCM) has a remarkable advantage for Internet of Things (IoT) applications owing to its digital output. Herein, one lead-free perovskite Cs 2 SnCl 6 film is employed to manufacture a QCM-based humidity sensor, and the practical application on...

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Bibliographic Details
Published in:IEEE electron device letters 2022-05, Vol.43 (5), p.805-808
Main Authors: Chang, Qijie, Wu, Daofu, Huang, Yanyi, Liang, Chengyao, Liu, Libo, Liu, Huanbin, Liu, Yan, Qiu, Jing, Tang, Xiaosheng, Han, Genquan
Format: Article
Language:English
Subjects:
Adsorption
Advantages
Humidity
humidity sensor
Internet of Things
Lead
Lead free
Perovskite
Perovskites
Quartz crystals
Relative humidity
Remote sensors
Sensors
Smart sensors
Thermal stability
Three-dimensional displays
Water chemistry
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Summary:The humidity sensor based on quartz crystal microbalance (QCM) has a remarkable advantage for Internet of Things (IoT) applications owing to its digital output. Herein, one lead-free perovskite Cs 2 SnCl 6 film is employed to manufacture a QCM-based humidity sensor, and the practical application on IoT is successfully performed. The fabricated humidity sensor exhibits a logarithmic linearity response and an ultra-high response of 7289 Hz for the relative humidity ranging from 11% to 85%. Furthermore, the Langmuir adsorption model is adopted to reveal the adsorption kinetics of the water molecules on the Cs 2 SnCl 6 film. These results suggest that the proposed humidity sensor could be a promising candidate for remote and smart humidity sensors.
ISSN:0741-3106
1558-0563
DOI:10.1109/LED.2022.3157633