Ga2O3-Based Schottky Diode Gas Sensors: Insights into Material Properties, Sensor Performance, and Applications
Shefali Mamataj, Bhaskar Roy, Deepshikha Datta, Sunipa Roy, Bimal DasIntroduction:
Gallium oxide (Ga2O3) has emerged as a promising gas-sensing material due to its wide bandgap, strong thermal stability, and excellent electronic properties. Among its device platforms, Schottky barrier diodes (SBDs) stand out for their high sensitivity and reliable performance.
Methods:
This review surveys key studies published between 2010 and 2025 from major databases, focusing on Ga2O3-based SBD design strategies, sensing mechanisms, and performance trends.
Results:
Reported devices demonstrate effective detection of gases such as NO2, CO, and NH3, with improved sensitivity, selectivity, and response times. Performance enhancements are mainly achieved through nanostructuring, heterojunctions, and surface functionalization.
Discussion:
Despite progress, challenges remain in large-scale fabrication, minimizing humidity effects, and ensuring long-term stability. Addressing these will be crucial for real-world applications.
Conclusion:
Ga2O3-based SBD gas sensors combine high sensitivity and durability, making them strong candidates for next-generation devices in environmental monitoring, industrial safety, and healthcare diagnostics.