Enriched Oxygen Vacancies in SnO2-x with Narrow Bandgap for Highly Sensitive Gas Sensing
Abstract
High-performance SnO₂-based chemiresistive gas sensors were realized at room temperature by narrowing the bandgap to enhance photogenerated carrier separation. The resulting SnO2-x exhibited one of the highest responses and lowest LODs among room-temperature and light-activated NO2 sensors. This work offers a promising strategy for next-generation, low-power gas sensing applications.