In situ-grown organo-lead bromide perovskite-induced electroactive γ-phase in aerogel PVDF films: an efficient photoactive material for piezoelectric energy harvesting and photodetector applications

Nanoscale ◽  
2020 ◽  
Vol 12 (13) ◽  
pp. 7214-7230 ◽  
Author(s):  
Suman Kumar Si ◽  
Sarbaranjan Paria ◽  
Sumanta Kumar Karan ◽  
Suparna Ojha ◽  
Amit Kumar Das ◽  
...  
Keyword(s):  
Energy Harvesting ◽  
Piezoelectric Energy Harvesting ◽  
Unique Combination ◽  
Energy Harvesters ◽  
Piezoelectric Energy ◽  
Lead Bromide

The unique combination of piezoelectric energy harvesters and light detectors progressively strengthens their application in the development of modern electronics.

Piezoelectric energy harvesting from roadway deformation under various traffic flow conditions

2020 ◽  
Vol 31 (15) ◽  
pp. 1751-1762
Author(s):  
Yangyang Zhang ◽  
He Zhang ◽  
Chaofeng Lü ◽  
Yisheng Chen ◽  
Ji Wang
Keyword(s):  
Energy Harvesting ◽  
Traffic Flow ◽  
Laboratory Tests ◽  
Piezoelectric Energy Harvesting ◽  
Flow Conditions ◽  
Energy Harvesters ◽  
Piezoelectric Energy ◽  
Roadway Deformation ◽  
Real Traffic

Many laboratory tests and in situ measurements have been conducted to study piezoelectric energy harvesting from roadway deformation. However, the performance of piezoelectric energy harvesters under real traffic flow conditions is still unknown. In this study, an electromechanical model of piezoelectric energy harvesters with detailed parameters (including the geometric parameters, material parameters, and circuits) is established, and the influences of traffic flow conditions (i.e. traffic speed and traffic density) on the output power of piezoelectric energy harvesters are analyzed by employing a scaling law method and traffic flow theory. The results indicate that remarkable differences exist in the load patterns and the frequencies between the laboratory tests (or in situ measurements) and real traffic flow conditions. Because of these differences, the results (especially the output electric power and optimization design methods) of previous studies may be inapplicable for piezoelectric energy harvesters embedded in roadways. Considering the distinguishing features of the traffic load pattern, the optimization criteria to determine the geometric parameters and the intrinsic system parameter of piezoelectric energy harvesters are obtained, and the corresponding optimal output power densities of the piezoelectric energy harvesters are also quantitatively calibrated. These theoretical results may serve as guidelines for optimizing the design of piezoelectric energy harvesters embedded in roadways under different traffic flow conditions.

On Mathematical Modeling of Piezoelectric Energy Harvesters

2014 ◽  
Vol 953-954 ◽  
pp. 655-658 ◽  
Author(s):  
Guang Qing Shang ◽  
Hong Bing Wang ◽  
Chun Hua Sun
Keyword(s):  
Mathematical Modeling ◽  
Energy Harvesting ◽  
Energy Harvester ◽  
Vibration Energy ◽  
Piezoelectric Energy Harvesting ◽  
Vibration Energy Harvester ◽  
Energy Harvesters ◽  
Piezoelectric Energy ◽  
Energy Harvesting System ◽  
Piezoelectric Vibration

Energy harvesting system has become one of important areas of ​​research and develops rapidly. How to improve the performance of the piezoelectric vibration energy harvester is a key issue in engineering applications. There are many literature on piezoelectric energy harvesting. The paper places focus on summarizing these literature of mathematical modeling of piezoelectric energy harvesting, ranging from the linear to nonlinear, from early a single mechanical degree to piezoaeroelastic problems.

Modeling and Analysis of Piezoelectric Energy Harvesting With Dynamic Plucking Mechanism

2019 ◽  
Vol 141 (3) ◽  
Author(s):  
Xinlei Fu ◽  
Wei-Hsin Liao
Keyword(s):  
Energy Harvesting ◽  
Research Work ◽  
Dynamic Interaction ◽  
Contact Theory ◽  
Vibration Energy ◽  
Piezoelectric Energy Harvesting ◽  
Comprehensive Model ◽  
Energy Harvesters ◽  
Piezoelectric Energy ◽  
Piezoelectric Beam

Nonharmonic excitations are widely distributed in the environment. They can work as energy sources of vibration energy harvesters for powering wireless electronics. To overcome the narrow bandwidth of linear vibration energy harvesters, plucking piezoelectric energy harvesters have been designed. Plucking piezoelectric energy harvesters can convert sporadic motions into plucking force to excite vibration energy harvesters and achieve broadband performances. Though different kinds of plucking piezoelectric energy harvesters have been designed, the plucking mechanism is not well understood. The simplified models of plucking piezoelectric energy harvesting neglect the dynamic interaction between the plectrum and the piezoelectric beam. This research work is aimed at investigating the plucking mechanism and developing a comprehensive model of plucking piezoelectric energy harvesting. In this paper, the dynamic plucking mechanism is investigated and the Hertzian contact theory is applied. The developed model of plucking piezoelectric energy harvesting accounts for the dynamic interaction between the plectrum and the piezoelectric beam by considering contact theory. Experimental results show that the developed model well predicts the responses of plucking piezoelectric energy harvesters under different plucking velocities and overlap lengths. Parametric studies are conducted on the dimensionless model after choosing appropriate scaling. The influences of plucking velocity and overlap length on energy harvesting performance and energy conversion efficiency are discussed. The comprehensive model helps investigate the characteristics and guide the design of plucking piezoelectric energy harvesters.

Organic Piezoelectric Energy Harvesters in Floor

2012 ◽  
Vol 433-440 ◽  
pp. 5848-5853 ◽  
Author(s):  
E. Bischur ◽  
N. Schwesinger
Keyword(s):  
Energy Harvesting ◽  
Mass Production ◽  
Active Material ◽  
Piezoelectric Energy Harvesting ◽  
Energy Yield ◽  
Great Flexibility ◽  
Geometrical Size ◽  
Energy Harvesters ◽  
Module Design ◽  
Piezoelectric Energy

The design, fabrication and testing of piezoelectric energy harvesting modules for floors is described. These modules are used beneath a parquet floor to harvest the energy of people walking over it. The harvesting modules consist of monoaxial stretched PVDF-foils. Multilayer modules are built up as roller-type capacitors. The fabrication process of the harvesting modules is simple and very suitable for mass production. Due to the use of organic polymers, the modules are characterized by a great flexibility and the possibility to create them in almost any geometrical size. The energy yield was determined depending on the dynamic loading force, the thickness of piezoelectric active material, the size of the piezoelectric modules, their alignment in the walking direction and their position on the floor. It was possible to generate up to 2.1mWs per pulse with loads of about 70 kg using a specific module design. An increase of the energy yield at higher loading forces and higher thicknesses of the modules is possible in general. Furthermore a test floor was assembled to determine the influence of the size, alignment and position of the modules on the energy yield.

Investigation of efficient piezoelectric energy harvesting from impulsive force

2020 ◽  
Vol 59 (SP) ◽  
pp. SPPD04
Author(s):  
S. Aphayvong ◽  
T. Yoshimura ◽  
S. Murakami ◽  
K. Kanda ◽  
N. Fujimura
Keyword(s):  
Energy Harvesting ◽  
Piezoelectric Energy Harvesting ◽  
Impulsive Force ◽  
Piezoelectric Energy

scholarly journals Piezoelectric Energy Harvesting Solutions: A Review

Sensors ◽  
2020 ◽  
Vol 20 (12) ◽  
pp. 3512 ◽  
Author(s):  
Corina Covaci ◽  
Aurel Gontean
Keyword(s):  
Energy Harvesting ◽  
Piezoelectric Effect ◽  
Piezoelectric Transducers ◽  
Piezoelectric Energy Harvesting ◽  
Piezoelectric Energy ◽  
Direct Piezoelectric Effect ◽  
Harvesting Technique ◽  
Different Shapes ◽  
Piezoelectric Devices ◽  
Review Current

The goal of this paper is to review current methods of energy harvesting, while focusing on piezoelectric energy harvesting. The piezoelectric energy harvesting technique is based on the materials’ property of generating an electric field when a mechanical force is applied. This phenomenon is known as the direct piezoelectric effect. Piezoelectric transducers can be of different shapes and materials, making them suitable for a multitude of applications. To optimize the use of piezoelectric devices in applications, a model is needed to observe the behavior in the time and frequency domain. In addition to different aspects of piezoelectric modeling, this paper also presents several circuits used to maximize the energy harvested.

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