Humidity sensors based on doped ZnO: An overview

ZnO is widely studied due to its fascinating properties useful for variety of application, specifically for the measurement of humidity. Humidity measurement is of great importance in a wide variety of commercial and industrial applications. Sensor based on ZnO depict prominence, further, doping with various elements results in sensing enhancement. A thorough review of doped ZnO for humidity sensing objective is carried out. A considerable part of the review is focused on the different structures of ZnO, further, emphasis on the kind dopant used in ZnO humidity sensing. The performance based on structure and dopant has detailed.