High sensitivity and fast response and recovery times in a ZnO nanorod array/p-Si self-powered ultraviolet detector

2012 ◽  
Vol 101 (26) ◽  
pp. 261108 ◽  
Author(s):  
J. J. Hassan ◽  
M. A. Mahdi ◽  
S. J. Kasim ◽  
Naser M. Ahmed ◽  
H. Abu Hassan ◽  
...  
Keyword(s):  
High Sensitivity ◽  
Nanorod Array ◽  
Fast Response ◽  
Zno Nanorod ◽  
Ultraviolet Detector ◽  
Recovery Times ◽  
Response And Recovery ◽  
Zno Nanorod Array ◽  
Self Powered

scholarly journals Tin Disulfide-Coated Microfiber for Humidity Sensing with Fast Response and High Sensitivity

Crystals ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 648
Author(s):  
Aijie Liang ◽  
Jingyuan Ming ◽  
Wenguo Zhu ◽  
Heyuan Guan ◽  
Xinyang Han ◽  
...  
Keyword(s):  
Humidity Sensor ◽  
Small Diameter ◽  
High Sensitivity ◽  
Large Change ◽  
Small Variation ◽  
Response Speed ◽  
Fast Response ◽  
Tin Disulfide ◽  
Recovery Times ◽  
Response And Recovery

Breath monitoring is significant in assessing human body conditions, such as cardiac and pulmonary symptoms. Optical fiber-based sensors have attracted much attention since they are immune to electromagnetic radiation, thus are safe for patients. Here, a microfiber (MF) humidity sensor is fabricated by coating tin disulfide (SnS2) nanosheets onto the surface of MF. The small diameter (~8 μm) and the long length (~5 mm) of the MF promise strong interaction between guiding light and SnS2. Thus, a small variation in the relative humidity (RH) will lead to a large change in optical transmitted power. A high RH sensitivity of 0.57 dB/%RH is therefore achieved. The response and recovery times are estimated to be 0.08 and 0.28 s, respectively. The high sensitivity and fast response speed enable our SnS2-MF sensor to monitor human breath in real time.

scholarly journals Enhanced photoresponse in ZnO nanorod array/p-GaN self-powered ultraviolet photodetectors via coupling with CuO nanostructures

2020 ◽  
Vol 7 (1) ◽  
pp. 015063 ◽  
Author(s):  
Qiu-Ming Fu ◽  
Zhi-Chao Yao ◽  
Ji-Liang Peng ◽  
Hong-Yang Zhao ◽  
Zhi-Bin Ma ◽  
...  
Keyword(s):  
Nanorod Array ◽  
Zno Nanorod ◽  
Zno Nanorod Array ◽  
Self Powered ◽  
Ultraviolet Photodetectors

Fabrication of ZnO nanorod array-based photodetector with high sensitivity to ultraviolet

2009 ◽  
Vol 404 (21) ◽  
pp. 4282-4285 ◽  
Author(s):  
Yingying Li ◽  
Xiang Dong ◽  
Chuanwei Cheng ◽  
Xuechao Zhou ◽  
Peigen Zhang ◽  
...  
Keyword(s):  
High Sensitivity ◽  
Nanorod Array ◽  
Zno Nanorod ◽  
Zno Nanorod Array

scholarly journals A Self-powered UV-visible Photodetector Based on p-Se/Al2O3/n-ZnO Nanorod Array Heterojunction

2019 ◽  
Vol 34 (5) ◽  
pp. 560
Author(s):  
Chao-Xiang SUN ◽  
Liang CHEN ◽  
Yu CHANG ◽  
Wei TIAN ◽  
Liang LI
Keyword(s):  
Nanorod Array ◽  
Zno Nanorod ◽  
Uv Visible ◽  
Zno Nanorod Array ◽  
Self Powered

scholarly journals Study of Two Vanadium Based Materials as Working Electrode for Developing A Selective Mixed-Potential Ammonia Sensor

Proceedings ◽  
2018 ◽  
Vol 2 (13) ◽  
pp. 770
Author(s):  
Gita Nematbakhsh Abkenar ◽  
Jean-Paul Viricelle ◽  
Mathilde Rieu ◽  
Philippe Breuil
Keyword(s):  
Reference Electrode ◽  
High Sensitivity ◽  
Fast Response ◽  
Mixed Potential ◽  
Ammonia Sensor ◽  
Ammonia Gas ◽  
Recovery Times ◽  
Response And Recovery ◽  
Increasing Temperature ◽  
Ammonia Gas Sensors

Mixed potential ammonia gas sensors were fabricated by using two sensing materials of Ni3V2O8 and Au-V2O5 as working electrodes, YSZ as electrolyte and platinum as reference electrode. The results have shown that the Ni3V2O8 sensors show cross-sensitivity toward NO gas. However, Au-V2O5 working electrodes displayed a high sensitivity to NH3 as well as fast response and recovery times at high temperatures. Furthermore, the results indicate that the selectivity of Au-V2O5 sensors increases by increasing temperature.

scholarly journals A high-performance self-powered broadband photodetector based on a CH3NH3PbI3 perovskite/ZnO nanorod array heterostructure

2016 ◽  
Vol 4 (30) ◽  
pp. 7302-7308 ◽  
Author(s):  
Jichao Yu ◽  
Xu Chen ◽  
Yi Wang ◽  
Hai Zhou ◽  
Mengni Xue ◽  
...  
Keyword(s):  
High Performance ◽  
High Stability ◽  
Nanorod Array ◽  
Zno Nanorod ◽  
Light Detection ◽  
Zno Nanorod Array ◽  
Self Powered

An FTO/ZnO-nanorod/CH3NH3PbI3/MoO3/Au photodetector exhibited high performance and can achieve self-powered, broadband light detection, high detectivity and responsivity, robust and high stability.

scholarly journals Enhanced performance of ZnO nanorod array/CuSCN ultraviolet photodetectors with functionalized graphene layers

RSC Advances ◽  
2021 ◽  
Vol 11 (13) ◽  
pp. 7682-7692
Author(s):  
Guangcan Luo ◽  
Ziling Zhang ◽  
Jing Jiang ◽  
Yang Liu ◽  
Wei Li ◽  
...  
Keyword(s):  
Low Cost ◽  
Nanorod Array ◽  
Hole Transport ◽  
Device Performance ◽  
Zno Nanorod ◽  
Functionalized Graphene ◽  
Graphene Layers ◽  
Zno Nanorod Array ◽  
Self Powered ◽  
Ultraviolet Photodetectors

Facile, convenient and low-cost processes were used to fabricate self-powered ZnO nanorod array ultraviolet photodetectors with CuSCN/rGO hole-transport bilayers. The device performance with a functionalized graphene layer was greatly improved.

A self-powered ultraviolet photodetector based on solution-processed p-NiO/n-ZnO nanorod array heterojunction

RSC Advances ◽  
2015 ◽  
Vol 5 (8) ◽  
pp. 5976-5981 ◽  
Author(s):  
Yanwei Shen ◽  
Xiaoqin Yan ◽  
Zhiming Bai ◽  
Xin Zheng ◽  
Yihui Sun ◽  
...  
Keyword(s):  
Forward Bias ◽  
Nanorod Array ◽  
Rapid Response ◽  
Zno Nanorod ◽  
Ultraviolet Photodetector ◽  
Uv Photodetector ◽  
Solution Processed ◽  
Zno Nanorod Array ◽  
Self Powered

A self-powered and rapid-response UV photodetector with p-NiO/ZnO-nanorod array heterojunction was developed. Under a small forward bias of 0.1 mV, the UV photosensitivity exceeded the value of ~105 previously reported.

scholarly journals A Full-Range Flexible and Printed Humidity Sensor Based on a Solution-Processed P(VDF-TrFE)/Graphene-Flower Composite

Nanomaterials ◽  
2021 ◽  
Vol 11 (8) ◽  
pp. 1915
Author(s):  
Shenawar Ali Khan ◽  
Muhammad Saqib ◽  
Muhammad Muqeet Rehman ◽  
Hafiz Mohammad Mutee Ur Rehman ◽  
Sheik Abdur Rahman ◽  
...  
Keyword(s):  
Active Layer ◽  
Humidity Sensor ◽  
High Reliability ◽  
Full Range ◽  
High Sensitivity ◽  
Fast Response ◽  
Considerable Change ◽  
Relative Humidity Range ◽  
Response And Recovery ◽  
Proportional Relationship

A novel composite based on a polymer (P(VDF-TrFE)) and a two-dimensional material (graphene flower) was proposed as the active layer of an interdigitated electrode (IDEs) based humidity sensor. Silver (Ag) IDEs were screen printed on a flexible polyethylene terephthalate (PET) substrate followed by spin coating the active layer of P(VDF-TrFE)/graphene flower on its surface. It was observed that this sensor responds to a wide relative humidity range (RH%) of 8–98% with a fast response and recovery time of 0.8 s and 2.5 s for the capacitance, respectively. The fabricated sensor displayed an inversely proportional response between capacitance and RH%, while a directly proportional relationship was observed between its impedance and RH%. P(VDF-TrFE)/graphene flower-based flexible humidity sensor exhibited high sensitivity with an average change of capacitance as 0.0558 pF/RH%. Stability of obtained results was monitored for two weeks without any considerable change in the original values, signifying its high reliability. Various chemical, morphological, and electrical characterizations were performed to comprehensively study the humidity-sensing behavior of this advanced composite. The fabricated sensor was successfully used for the applications of health monitoring and measuring the water content in the environment.

scholarly journals A Self-Powered Nanogenerator for the Electrical Protection of Integrated Circuits from Trace Amounts of Liquid

2019 ◽  
Vol 12 (1) ◽  
Author(s):  
Zhuang Hui ◽  
Ming Xiao ◽  
Daozhi Shen ◽  
Jiayun Feng ◽  
Peng Peng ◽  
...  
Keyword(s):  
Integrated Circuits ◽  
High Performance ◽  
Printed Circuit Board ◽  
Short Circuit ◽  
High Sensitivity ◽  
Short Circuit Current ◽  
Fast Response ◽  
Open Circuit ◽  
Circuit Board ◽  
Self Powered

Abstract With the increase in the use of electronic devices in many different environments, a need has arisen for an easily implemented method for the rapid, sensitive detection of liquids in the vicinity of electronic components. In this work, a high-performance power generator that combines carbon nanoparticles and TiO2 nanowires has been fabricated by sequential electrophoretic deposition (EPD). The open-circuit voltage and short-circuit current of a single generator are found to exceed 0.7 V and 100 μA when 6 μL of water was applied. The generator is also found to have a stable and reproducible response to other liquids. An output voltage of 0.3 V was obtained after 244, 876, 931, and 184 μs, on exposure of the generator to 6 μL of water, ethanol, acetone, and methanol, respectively. The fast response time and high sensitivity to liquids show that the device has great potential for the detection of small quantities of liquid. In addition, the simple easily implemented sequential EPD method ensures the high mechanical strength of the device. This compact, reliable device provides a new method for the sensitive, rapid detection of extraneous liquids before they can impact the performance of electronic circuits, particularly those on printed circuit board.

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