Photoconducting tellurium for submillimeterwave detectors

Growth mechanism of Te nanotubes by a direct vapor phase process and their room-temperature CO and NO2 sensing properties

“…Tellurium (Te), which is a p-type elemental semiconductor with a direct bandgap energy of 0.35 eV, exhibits several interesting physical and chemical properties and is considered for use in various technological applications, such as optical recording media [1], photoconductors [2], thermoelectric and piezo-electric devices [3,4], and gas sensors [5][6][7][8]. For gas sensing applications, Te thin films can detect various toxic gases, such as nitrogen dioxide (NO 2 ) [5], carbon oxide (CO) [6], propylamine [6], ammonia (NH 3 ) [7], and hydrogen sulfide (H 2 S) [8], at room temperature.…”

Vapor–Solid Growth of p-Te/n-SnO2 Hierarchical Heterostructures and Their Enhanced Room-Temperature Gas Sensing Properties

“…Tellurium (Te) is a direct band gap, p-type chalcogenide semiconductor with a band gap energy of 0.35 eV. Owing to its unique and interesting properties, Te has been widely used in optical storage medium, high-efficiency photoconductors, piezoelectric and thermoelectric devices, as well as gas sensors. − For use in gas sensors, Te thin films showed promising sensing properties at room temperature for several poisonous gases, such as propylamine, carbon monoxide (CO), nitrogen dioxide (NO 2 ), ammonia (NH 3 ), and hydrogen sulfide (H 2 S) . Further improvements in sensitivity to NO 2 gas and selectivity to chlorine gas were reported in one-dimensional (1D) Te nanotubes due to their high specific surface areas.…”