scholarly journals Nanogenerator-based dual-functional and self-powered thin patch loudspeaker or microphone for flexible electronics

2017 ◽  
Vol 8 (1) ◽  
Author(s):  
Wei Li ◽  
David Torres ◽  
Ramón Díaz ◽  
Zhengjun Wang ◽  
Changsheng Wu ◽  
...  
Keyword(s):  
Flexible Electronics ◽  
Dual Functional ◽  
Self Powered

scholarly journals MoS2/h-BN/Graphene Heterostructure and Plasmonic Effect for Self-Powering Photodetector: A Review

Materials ◽  
2021 ◽  
Vol 14 (7) ◽  
pp. 1672
Author(s):  
Umahwathy Sundararaju ◽  
Muhammad Aniq Shazni Mohammad Haniff ◽  
Pin Jern Ker ◽  
P. Susthitha Menon
Keyword(s):  
Flexible Electronics ◽  
Hexagonal Boron Nitride ◽  
2D Materials ◽  
Optical Power ◽  
Active Regions ◽  
Green Technology ◽  
Plasmonic Effect ◽  
Zero Bias ◽  
Electrical Signals ◽  
Self Powered

A photodetector converts optical signals to detectable electrical signals. Lately, self-powered photodetectors have been widely studied because of their advantages in device miniaturization and low power consumption, which make them preferable in various applications, especially those related to green technology and flexible electronics. Since self-powered photodetectors do not have an external power supply at zero bias, it is important to ensure that the built-in potential in the device produces a sufficiently thick depletion region that efficiently sweeps the carriers across the junction, resulting in detectable electrical signals even at very low-optical power signals. Therefore, two-dimensional (2D) materials are explored as an alternative to silicon-based active regions in the photodetector. In addition, plasmonic effects coupled with self-powered photodetectors will further enhance light absorption and scattering, which contribute to the improvement of the device’s photocurrent generation. Hence, this review focuses on the employment of 2D materials such as graphene and molybdenum disulfide (MoS2) with the insertion of hexagonal boron nitride (h-BN) and plasmonic nanoparticles. All these approaches have shown performance improvement of photodetectors for self-powering applications. A comprehensive analysis encompassing 2D material characterization, theoretical and numerical modelling, device physics, fabrication and characterization of photodetectors with graphene/MoS2 and graphene/h-BN/MoS2 heterostructures with plasmonic effect is presented with potential leads to new research opportunities.

Self Powered Flexible Electronics Based on Self Poled “Ferroelectretic” Nanogenerator

MRS Advances ◽  
2016 ◽  
Vol 1 (45) ◽  
pp. 3083-3088 ◽  
Author(s):  
Sujoy Kumar Ghosh ◽  
Dipankar Mandal
Keyword(s):  
Composite Film ◽  
Flexible Electronics ◽  
Light Emitting Diode ◽  
Open Circuit ◽  
Pvdf Film ◽  
Light Emitting ◽  
Single Finger ◽  
Finger Touch ◽  
Self Powered ◽  
Pure Pvdf

ABSTRACTA ferroelectric nanogenerator without any electric poling treatment has been realized by incorporation of ytterbium (Yb) salt incorporated porous PVDF composite film. The composite film compose of electroactive β- and γ-phases, demonstrates higher dielectric and ferroelectric polarization responses than pure PVDF film. The 3 V of open circuit voltage with 0.47 µW/cm2 power density was generated by the nanogenerator upon single finger touch. It can also operate capacitor and light emitting diode without any subsidiary batteries.

Self-sintering liquid metal ink with laponite for flexible electronics

2021 ◽  
Author(s):  
Pengcheng Wu ◽  
Lu-yu Zhou ◽  
Shang Lv ◽  
JianZhong Fu ◽  
Yong He
Keyword(s):  
Liquid Metal ◽  
Flexible Electronics ◽  
Soft Robotics ◽  
Stretchable Electronics ◽  
Self Powered ◽  
Widespread Interest ◽  
Liquid Metal Ink ◽  
Flexible And Stretchable Electronics

Liquid-metal (LM)-based flexible and stretchable electronics have attracted widespread interest in soft robotics, self-powered devices and electronic skins. Although nanometerization can facilitate deposition and patterning of LMs onto substrates, subsequent...

scholarly journals Self-Powered Flexible Sour Sensor for Detecting Ascorbic Acid Concentration Based on Triboelectrification/Enzymatic-Reaction Coupling Effect

Sensors ◽  
2021 ◽  
Vol 21 (2) ◽  
pp. 373
Author(s):  
Tianming Zhao ◽  
Qi Wang ◽  
An Du
Keyword(s):  
Ascorbic Acid ◽  
Acid Concentration ◽  
Flexible Electronics ◽  
Coupling Effect ◽  
Enzymatic Reaction ◽  
Wire Mesh ◽  
Material System ◽  
Ascorbic Acid Concentration ◽  
Self Powered ◽  
Reaction Coupling

Artificial sensory substitution systems can mimic human sensory organs through replacing the sensing process of a defective sensory receptor and transmitting the sensing signal into the nervous system. Here, we report a self-powered flexible gustation sour sensor for detecting ascorbic acid concentration. The material system comprises of Na2C2O4-Ppy with AAO modification, PDMS and Cu wire mesh. The working mechanism is contributed to the triboelectrification/enzymatic-reaction coupling effect, and the device can collect weak energy from body movements and directly output triboelectric current without any external power-units. The triboelectric output is affected by AA concentration, and the response is up to 34.82% against 15.625 mM/L of AA solution. Furthermore, a practical application in detecting ascorbic acid concentration of different drinks has been demonstrated. This work can encourage the development of wearable flexible electronics and this self-powered sour sensor has the potential that can be acted as a kind of gustatory receptors to build electronic tongues.

Self-powered ultra-flexible electronics via nano-grating-patterned organic photovoltaics

Nature ◽  
2018 ◽  
Vol 561 (7724) ◽  
pp. 516-521 ◽  
Author(s):  
Sungjun Park ◽  
Soo Won Heo ◽  
Wonryung Lee ◽  
Daishi Inoue ◽  
Zhi Jiang ◽  
...  
Keyword(s):  
Organic Photovoltaics ◽  
Flexible Electronics ◽  
Self Powered

scholarly journals Flexible and Wearable PDMS-Based Triboelectric Nanogenerator for Self-Powered Tactile Sensing

Nanomaterials ◽  
2019 ◽  
Vol 9 (9) ◽  
pp. 1304 ◽  
Author(s):  
Jie Wang ◽  
Shuo Qian ◽  
Junbin Yu ◽  
Qiang Zhang ◽  
Zhongyun Yuan ◽  
...  
Keyword(s):  
Human Body ◽  
Flexible Electronics ◽  
Mechanical Energy ◽  
Electric Energy ◽  
Green Light ◽  
Triboelectric Nanogenerator ◽  
Good Sensitivity ◽  
Pdms Film ◽  
Compact Size ◽  
Self Powered

Flexible electronics devices with tactile perception can sense the mechanical property data of the environment and the human body, and they present a huge potential in the human health system. In particular, the introduction of ultra-flexible and self-powered characteristics to tactile sensors can effectively reduce the problems caused by rigid batteries. Herein, we report a triboelectric nanogenerator (TENG), mainly consisting of an ultra-flexible polydimethylsiloxane (PDMS) film with micro-pyramid-structure and sputtered aluminum electrodes, which achieves highly conformal contact with skin and the self-powered detection of human body motions. The flexible polyethylene terephthalate (PET) film was selected as spacer layer, which made the sensor work in the contact-separation mode and endowed the perfect coupling of triboelectrification and electrostatic induction. Moreover, the controllable and uniform micro-structure PDMS film was fabricated by using the micro-electro-mechanical system (MEMS) manufacturing process, bringing a good sensitivity and high output performance to the device. The developed TENG can directly convert mechanical energy into electric energy and light up 110 green Light-Emitting Diodes (LEDs). Furthermore, the TENG-based sensor displays good sensitivity (2.54 V/kPa), excellent linearity (R2 = 0.99522) and good stability (over 30,000 cycles). By virtue of the compact size, great electrical properties, and great mechanical properties, the developed sensor can be conformally attached to human skin to monitor joint movements, presenting a promising application in wearable tactile devices. We believe that the ultra-flexible and self-powered tactile TENG-based sensor could have tremendous application in wearable electrons.

Moisture-insensitive, self-powered paper-based flexible electronics

Nano Energy ◽  
2020 ◽  
Vol 78 ◽  
pp. 105301 ◽  
Author(s):  
Marina Sala de Medeiros ◽  
Daniela Chanci ◽  
Ramses V. Martinez
Keyword(s):  
Flexible Electronics ◽  
Self Powered
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