Humidity and salt sensor based on CdSSe nanowire chip

2019 2nd International Conference on Advanced Materials, Intelligent Manufacturing and Automation

Lu, Tianqi^1 ; Zhang, Min^1 ; Guo, Shuai^1 ; Liu, Ruibin^1

Beijing Key Laboratory of Nanophotonics and Ultrafine Optoelectronic Systems, School of Physics, Beijing Institute of Technology, Beijing

100081, China^1

关键词: Composition-graded;    Humidity response;    Prediction accuracy;    Reproducibilities;    Response characteristic;    Salt concentration;    Salt-sensitive;    Stress sensitivity;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/569/2/022006/pdf
DOI  :  10.1088/1757-899X/569/2/022006

来源: IOP

【 摘 要 】

The humidity and salt sensitive characteristics of sensor based on polyimide coated CdS1-xSex semiconductor alloy nanowire chip have been investigated. The composition-graded CdS1-xSex nanowire chip with large size shows excellent photo-sensitivity and stress sensitivity, synthesized by a simple CVD method and its composition can be gradually tuned from CdSe to CdS. The conductivity of the sensor showed good humidity response characteristics with a maximum responsivity (dI / I) of 85% at 80% RH. In addition, the current decreases linearly with increasing salt concentration, indicating that the chip sensor has good salt responsiveness and the best salt responsiveness is 80%. The RH dependent resistance upon illumination exhibits good linearity (R2=0.9948) to guarantee the high prediction accuracy. In addition to good moisture and salt response characteristics, the sensor also exhibits excellent stability and reproducibility.