A theoretical modeling analysis for triboelectrification controlled light emitting diodes

Ahmed, Abdelsalam; Shehata, Mohamed; Hassan, Islam; Abdelhak, Yasmine I.; Cigdem, Efe; El‐Kady, Maher F.; Ismail, Yehea; Mostafa, Hassan

doi:10.1016/j.nanoen.2020.104874

Cited by 6 publications

(4 citation statements)

References 28 publications

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“…However, there are significant obstacles that still pose a challenge for PGs to reach such extremely low levels of mechanical frequencies (<10 Hz or sub 1 Hz frequencies). On the other hand, TENGs, owing to their attractive attributes, have been successfully applied for harvesting all kinds of mechanical energy such as vibration, human body motion, animal organs wind power, and water motion (Yang et al, 2013;Ahmed et al, 2017a, 2017c, 2017d, Ahmed et al, 2017, 2017f, Ahmed et al, 2018, 2019a, 2019c, 2019d, 2020b. A theoretical comparison between TENGs ll OPEN…”

Section: Introductionmentioning

confidence: 99%

Triboelectric Nanogenerator versus Piezoelectric Generator at Low Frequency (<4 Hz): A Quantitative Comparison

et al. 2020

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Triboelectric nanogenerators (TENGs) and piezoelectric generators (PGs) are generally considered the two most common approaches for harvesting ambient mechanical energy that is ubiquitous in our everyday life. The main difference between the two generators lies in their respective working frequency range. Despite the remarkable progress, there has been no quantitative studies on the operating frequency band of the two generators at frequency values below 4 Hz, typical of human motion. Here, the two generators are systematically compared based on their energy harvesting capabilities below 4 Hz. Unlike PGs, the TENG demonstrates higher power performance and is almost independent of the operating frequency, making it highly efficient for multi-frequency operation. In addition, PGs were shown to be inapplicable for charging capacitors when a rectifier was attached to the system. The results of this work reveal the tremendous potential of flexible TENGs for harvesting energy at low frequency.

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Section: Introductionmentioning

confidence: 99%

Triboelectric Nanogenerator versus Piezoelectric Generator at Low Frequency (<4 Hz): A Quantitative Comparison

et al. 2020

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“…7 Thus, PSCs can be used to develop smart microelectronic devices with modern functions, 8 for example, piezoelectric field-effect transistors, 9,10 nanogenerators, 11 photodetectors, 12 and light-emitting diodes. 13 When PSCs are reduced to the nanoscale, it is necessary to take the size effect into account. 14 Several models such as the stress gradient, 15,16 strain gradient, [17][18][19] couple stress, [20][21][22] and integral-type theories 23,24 have been developed to describe the size effect.…”

Section: Introductionmentioning

confidence: 99%

Effects of flexoelectricity and strain gradient on bending vibration characteristics of piezoelectric semiconductor nanowires

Zhao

Niu

et al. 2021

Journal of Applied Physics

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In this paper, the governing equation of a piezoelectric semiconductor (PSC) is derived after a consideration of flexoelectricity and the strain gradient effect. A one-dimensional first-order beam model is obtained through integration across its section. Based on this model, theoretical analysis is carried out for a cantilever PSC nanowire subjected to a time-harmonic transverse shear force. The effects of flexoelectricity and the strain gradient on bending vibration characteristics are investigated, including the natural frequencies and distributions of physical quantities. The results show that the strain gradient effect on the natural frequency and stiffness of a PSC nanowire is greater than that of flexoelectricity, while with regard to the influence on electric potential and carrier concentration, the reverse is true. Our findings shed light on the design and optimization of PSC devices such as energy harvesters at the nanoscale.

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“…Several outstanding reviews exist in the literature regarding triboelectricity, standardization of TENGs, assembly of TENGs, chemical modifications for advanced TENGs, and different applications of TENG technology. [ 40–56 ] In this review, we deliver a comprehensive overview of the role of surfaces, interfaces, and structures, as well as various engineering strategies that affect the performance of TENGs. Section 1 provides a brief introduction to the working mechanism and performance metrics of TENGs.…”

Section: Introductionmentioning

confidence: 99%

Toward High‐Performance Triboelectric Nanogenerators by Engineering Interfaces at the Nanoscale: Looking into the Future Research Roadmap

Ahmed

Hassan

Pourrahimi

et al. 2020

Adv Materials Technologies

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To meet the future need for clean and sustainable energies, there has been considerable interest in the development of triboelectric nanogenerators (TENGs) that scavenge waste mechanical energies. The performance of a TENG at the macroscale is determined by the multifaceted role of surface and interface properties at the nanoscale, whose understanding is critical for the future development of TENGs. Therefore, various protocols from the atomic to the macrolevel for fabrication and tuning of surfaces and interfaces are required to obtain the desired TENG performance. These protocols branch out into three categories: chemical engineering, physical engineering, and structural engineering. Chemical engineering is an affordable and optimal strategy for introducing more surface polarities and higher work functions for the improvement of charge transfer. Physical engineering includes the utilization of surface morphology control, and interlayer interactions, which can enhance the active interfacial area and electron transfer capacity. Structural engineering at the macroscale, which includes device and electrode design/modifications has a considerable effect on the performance of TENGs. Future challenges and promising research directions related to the construction of next‐generation TENG devices, taking into consideration “interfaces” are also presented.

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A theoretical modeling analysis for triboelectrification controlled light emitting diodes

Cited by 6 publications

References 28 publications

Triboelectric Nanogenerator versus Piezoelectric Generator at Low Frequency (<4 Hz): A Quantitative Comparison

Triboelectric Nanogenerator versus Piezoelectric Generator at Low Frequency (<4 Hz): A Quantitative Comparison

Effects of flexoelectricity and strain gradient on bending vibration characteristics of piezoelectric semiconductor nanowires

Toward High‐Performance Triboelectric Nanogenerators by Engineering Interfaces at the Nanoscale: Looking into the Future Research Roadmap

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