Topic
Responsivity
About: Responsivity is a research topic. Over the lifetime, 9918 publications have been published within this topic receiving 186118 citations.
Papers published on a yearly basis
Papers
More filters
TL;DR: In this article, polyaniline-reduced graphene oxide (PANI-rGO) nanocomposite films were used as sensitive membranes in NH3 gas sensors operated at room temperature (300 K).
94 citations
TL;DR: In this article, a model of the optical characteristics of HEMTs, which takes into account carrier transport as well as the quantum mechanical nature of the two-dimensional (2D) electron gas channel, is presented.
Abstract: The use of microwave high-electron mobility transistors (HEMTs) as photodetectors or optically controlled circuit elements have attracted interest. A model of the optical characteristics of HEMTs, which takes into account carrier transport as well as the quantum mechanical nature of the two-dimensional (2-D) electron gas channel, is presented. It is shown that the effect of illumination is equivalent to a shift in the gate to source bias voltage, referred to as the internal photovoltaic effect. The theoretical model is supported by experimental results that demonstrate that the HEMT photoresponse is a nonlinear function of light intensity with very high responsivity at low optical power levels.
94 citations
TL;DR: Improved sensitivity of a 2D MoS2-based gas sensor is demonstrated by controlling the Schottky barrier height and the NO2 responsivity increased, and it was found to be effective for CO and CO2 gases, which had little reactivity in 2DMoS2 -based gas sensors.
Abstract: Two-dimensional (2D) transition-metal dichalcogenides have attracted significant attention as gas-sensing materials owing to their superior responsivity at room temperature and their possible application as flexible electronic devices. Especially, reliable responsivity and selectivity for various environmentally harmful gases are the main requirements for the future chemiresistive-type gas sensor applications. In this study, we demonstrate improved sensitivity of a 2D MoS2-based gas sensor by controlling the Schottky barrier height. Chemical vapor deposition process was performed at low temperature to obtain layer-controlled 2D MoS2, and the NO2 gas responsivity was confirmed by the fabricated gas sensor. Then, the number of MoS2 layers was fixed and the types of electrode materials were varied for controlling the Schottky barrier height. As the Schottky barrier height increased, the NO2 responsivity increased, and it was found to be effective for CO and CO2 gases, which had little reactivity in 2D MoS2-b...
93 citations
TL;DR: In this paper, a self-powered and fast response photodetectors based on β-Ga2O3/4H-SiC pn heterojunction are demonstrated by depositing β-O3 films on p-type 4H−SiC templates using Pulse Laser Deposition method, and the detectors exhibit an ultrahigh current Ion/Ioff ratio more than 103 (∼1655) at the light intensity of 91 μW/cm2 and a fast photo-response speed (a rise time of 11 milliseconds and a decay time of 19 milliseconds
93 citations
TL;DR: In this article, the fabrication and characterization of the solar-blind AlGaN avalanche photodiodes grown by metal-organic chemical vapor deposition on c-plane sapphire substrate was reported.
Abstract: We report the fabrication and characterization of the solar-blind AlGaN avalanche photodiodes grown by metal-organic chemical vapor deposition on c-plane sapphire substrate. The fabricated devices with 100 μm diameter active area exhibit a peak responsivity of 79.8 mA/W at 270 nm and zero bias, corresponding to an external quantum efficiency of 37%. Multiplication gains as high as more than 2500 were obtained in these devices.
93 citations