scholarly journals High responsivity and 1/f noise of an ultraviolet photodetector based on Ni doped ZnO nanoparticles

RSC Advances ◽  
2018 ◽  
Vol 8 (56) ◽  
pp. 32333-32343 ◽  
Author(s):  
Imen Ben Elkamel ◽  
Nejeh Hamdaoui ◽  
Amine Mezni ◽  
Ridha Ajjel ◽  
Lotfi Beji
Keyword(s):  
Zno Nanoparticles ◽  
Glass Substrate ◽  
Low Cost ◽  
Fast Response ◽  
The Novel ◽  
Ni Nanoparticles ◽  
Ultraviolet Photodetector ◽  
Uv Photodetector ◽  
High Responsivity ◽  
Doped Zno

This study involves the novel fabrication of a high responsivity, fast response, and low-cost (UV) photodetector (PD) based on ZnO/Ni nanoparticles deposited on a glass substrate.

scholarly journals Feasibility Study for a Chemical Process Particle Size Characterization System for Explosive Environments Using Low Laser Power

Micromachines ◽  
2020 ◽  
Vol 11 (10) ◽  
pp. 911
Author(s):  
Jesse Ross-Jones ◽  
Tobias Teumer ◽  
Susann Wunsch ◽  
Lukas Petri ◽  
Hermann Nirschl ◽  
...  
Keyword(s):  
Light Scattering ◽  
Low Cost ◽  
Particle Diameter ◽  
Feasibility Studies ◽  
Fast Response ◽  
The Novel ◽  
Micro Channels ◽  
Size Characterization ◽  
Novel Method ◽  
Particle Size Characterization

The industrial particle sensor market lacks simple, easy to use, low cost yet robust, safe and fast response solutions. Towards development of such a sensor, for in-line use in micro channels under continuous flow conditions, this work introduces static light scattering (SLS) determination of particle diameter using a laser with an emission power of less than 5 µW together with sensitive detectors with detection times of 1 ms. The measurements for the feasibility studies are made in an angular range between 20° and 160° in 2° increments. We focus on the range between 300 and 1000 nm, for applications in the production of paints, colors, pigments and crystallites. Due to the fast response time, reaction characteristics in microchannel designs for precipitation and crystallization processes can be studied. A novel method for particle diameter characterization is developed using the positions of maxima and minima and slope distribution. The novel algorithm to classify particle diameter is especially developed to be independent of dispersed phase concentration or concentration fluctuations like product flares or signal instability. Measurement signals are post processed and particle diameters are validated against Mie light scattering simulations. The design of a low cost instrument for industrial use is proposed.

Ultraviolet Photodetector Based on ITO/MgO/ZnO Structure Grown by Hydrothermal Process

2018 ◽  
Vol 18 (12) ◽  
pp. 8399-8402
Author(s):  
Yunfeng Wu ◽  
Naisen Yu ◽  
Haiying Du ◽  
Dongping Liu ◽  
Hongwei Liang ◽  
...  
Keyword(s):  
Low Temperature ◽  
Large Scale ◽  
Low Cost ◽  
Hydrothermal Process ◽  
Ultraviolet Photodetector ◽  
Uv Detector ◽  
Uv Photodetector ◽  
Metal Insulator ◽  
Aqueous Method ◽  
Novel Method

A simple two-step aqueous method was employed to grow MgO nanostructures on ZnO/sapphire at low temperature. The obtained thin MgO nanostructures were uniformly distributed on the surface of ZnO layer and showed the sheet-like structures. Meanwhile, an ultraviolet (UV) photodetector based on ITO/MgO/ZnO structures was fabricated by simple way. The obtained UV detector showed excellent UV sensing properties. This novel method will greatly facilitate fabrication of large-scale metal-insulator-semiconductor with relatively low cost at remarkably low temperature.

Fabrication visible-blind ultraviolet photodetector based on ZnS/GaN heterostructure with fast response

2020 ◽  
Vol 10 (5) ◽  
pp. 629-633
Author(s):  
Yong Wang ◽  
Naisen Yu
Keyword(s):  
Magnetron Sputtering ◽  
Low Cost ◽  
Response Speed ◽  
Fast Response ◽  
Ultraviolet Photodetector ◽  
Radio Frequency Magnetron Sputtering ◽  
Uv Detectors ◽  
Heterojunction Structure ◽  
Gan Heterostructure ◽  
Visible Blind

In this paper, visible-blind ultraviolet (UV) detectors based on a ZnS/p-GaN heterojunction structure were fabricated. The heterojunction structure was composed of a ZnS nanostructure deposited on a p-GaN/sapphire substrate. The ZnS nanostructured component was obtained via radio-frequency magnetron sputtering. The device based on this ZnS/p-GaN heterojunction structure showed a reproducible, stable, and fast response speed. Therefore, the results demonstrated that the ZnS/p-GaN heterojunction was successfully fabricated using this relatively low-cost method.

High-performance self-powered deep ultraviolet photodetector based on MoS2/GaN p–n heterojunction

2018 ◽  
Vol 6 (2) ◽  
pp. 299-303 ◽  
Author(s):  
Ranran Zhuo ◽  
Yuange Wang ◽  
Di Wu ◽  
Zhenhua Lou ◽  
Zhifeng Shi ◽  
...  
Keyword(s):  
High Performance ◽  
Uv Light ◽  
High Sensitivity ◽  
Fast Response ◽  
Ultraviolet Photodetector ◽  
High Responsivity ◽  
Deep Ultraviolet ◽  
Deep Uv ◽  
Specific Detectivity ◽  
Self Powered

Self-powered MoS2/GaN p–n heterojunction photodetectors exhibited high sensitivity to deep-UV light with high responsivity, specific detectivity and fast response speeds.

A flexible ultraviolet photodetector based on single crystalline MoO3 nanosheets

2015 ◽  
Vol 3 (28) ◽  
pp. 7469-7475 ◽  
Author(s):  
Qinghong Zheng ◽  
Jin Huang ◽  
Shilin Cao ◽  
Haili Gao
Keyword(s):  
Response Speed ◽  
Fast Response ◽  
Mechanical Forces ◽  
Ultraviolet Photodetector ◽  
Uv Photodetector ◽  
Single Crystalline ◽  
Spectral Selectivity ◽  
Excellent Stability

A flexible UV photodetector was fabricated based on highly crystalline MoO3 nanosheets. The photodetector exhibits high UV spectral selectivity, excellent stability, fast response speed and is able to bear significant external mechanical forces.

Construction of GaN/Ga2O3 p–n junction for an extremely high responsivity self-powered UV photodetector

2017 ◽  
Vol 5 (40) ◽  
pp. 10562-10570 ◽  
Author(s):  
Peigang Li ◽  
Haoze Shi ◽  
Kai Chen ◽  
Daoyou Guo ◽  
Wei Cui ◽  
...  
Keyword(s):  
Ultraviolet Photodetector ◽  
Uv Photodetector ◽  
High Responsivity ◽  
Self Powered

A self-powered ultraviolet photodetector with an extremely high responsivity (54.43 mA W−1) was fabricated by constructing p–n junction of GaN/Ga2O3 films.

scholarly journals Fully Polymeric Domes as High-Stroke Biasing System for Soft Dielectric Elastomer Actuators

2021 ◽  
Vol 8 ◽  
Author(s):  
Julian Neu ◽  
Jonas Hubertus ◽  
Sipontina Croce ◽  
Günter Schultes ◽  
Stefan Seelecke ◽  
...  
Keyword(s):  
Compliant Mechanism ◽  
Low Cost ◽  
Three Dimensional ◽  
Fast Response ◽  
The Novel ◽  
Dielectric Elastomer Actuators ◽  
Compliance Requirements ◽  
Actuator Design ◽  
Force Displacement ◽  
Robotic Applications

The availability of compliant actuators is essential for the development of soft robotic systems. Dielectric elastomers (DEs) represent a class of smart actuators which has gained a significant popularity in soft robotics, due to their unique mix of large deformation (>100%), lightweight, fast response, and low cost. A DE consists of a thin elastomer membrane coated with flexible electrodes on both sides. When a high voltage is applied to the electrodes, the membrane undergoes a controllable mechanical deformation. In order to produce a significant actuation stroke, a DE membrane must be coupled with a mechanical biasing system. Commonly used spring-like bias elements, however, are generally made of rigid materials such as steel, and thus they do not meet the compliance requirements of soft robotic applications. To overcome this issue, in this paper we propose a novel type of compliant mechanism as biasing elements for DE actuators, namely a three-dimensional polymeric dome. When properly designed, such types of mechanisms exhibit a region of negative stiffness in their force-displacement behavior. This feature, in combination with the intrinsic softness of the polymeric material, ensures large actuation strokes as well as compliance compatibility with soft robots. After presenting the novel biasing concept, the overall soft actuator design, manufacturing, and assembly are discussed. Finally, experimental characterization is conducted, and the suitability for soft robotic applications is assessed.

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