Humidity
sensors with good repeatability, low hysteresis, and low-power
consumption are increasingly important for environmental monitoring
and industrial control applications. Herein, an impedance-type humidity
sensor under low working voltage (5 mV) utilizing a rGO-BiVO4 nanocomposite is demonstrated. The rGO-BiVO4 humidity
sensor exhibits superior sensing performances, including good repeatability,
negligible hysteresis (0.47%), fast response and recovery time, low
power consumption, good stability, and anti-interference ability.
The ultraviolet–visible absorption spectrum reveals that the
narrow band gap of the rGO-BiVO4 nanocomposite is conductive
to the electron transfer. The complex impedance spectra and the energy
band structure analysis further suggest that the boosted humidity
performance results from the formation of a heterojunction and the
decrease of the heterojunction barrier height. The facile fabrication
route, enhanced sensing performance, and excellent device reliability
make the rGO-BiVO4 sensor highly attractive for high-end
humidity sensing applications.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.