Fabrication of an eco-friendly composite nanogenerator for self-powered photosensor applications

Saravanakumar, B.; Thiyagarajan, Kaliannan; Alluri, Nagamalleswara Rao; Soyoon, Shin; Kim, Tae-Hyun; Lin, Zong‐Hong; Kim, Sang‐Jae

doi:10.1016/j.carbon.2014.11.041

Cited by 46 publications

(31 citation statements)

References 38 publications

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“…Energy harvesting by utilizing piezoelectric materials that can convert mechanical motion to electrical energy is suitable for wearable products, where devices can be charged during daily activities. 3,4 Originated from seminal contributions by Wang and co-workers, 5,6,7 arrays of zinc oxide (ZnO) nanowires have been utilized as promising electricity generators by the piezoelectric effect. The piezoelectricity stems from the crystalline structures of the nanowires and their self-rectifying nature at the electrical contact to substrate materials.…”

Section: Introductionmentioning

confidence: 99%

Sponge-Templated Macroporous Graphene Network for Piezoelectric ZnO Nanogenerator

Chen

Kumar

et al. 2015

ACS Appl. Mater. Interfaces

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We report a simple approach to fabricate zinc oxide (ZnO) nanowire based electricity generators on three-dimensional (3D) graphene networks by utilizing a commercial polyurethane (PU) sponge as a structural template. Here, a 3D network of graphene oxide is deposited from solution on the template and then is chemically reduced. Following steps of ZnO nanowire growth, polydimethylsiloxane (PDMS) backfilling and electrode lamination completes the fabrication processes. When compared to conventional generators with 2D planar geometry, the sponge template provides a 3D structure that has a potential to increase power density per unit area. The modified one-pot ZnO synthesis method allows the whole process to be inexpensive and environmentally benign. The nanogenerator yields an open circuit voltage of ∼0.5 V and short circuit current density of ∼2 μA/cm(2), while the output was found to be consistent after ∼3000 cycles. Finite element analysis of stress distribution showed that external stress is concentrated to deform ZnO nanowires by orders of magnitude compared to surrounding PU and PDMS, in agreement with our experiment. It is shown that the backfilled PDMS plays a crucial role for the stress concentration, which leads to an efficient electricity generation.

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Section: Introductionmentioning

confidence: 99%

Sponge-Templated Macroporous Graphene Network for Piezoelectric ZnO Nanogenerator

Chen

Kumar

et al. 2015

ACS Appl. Mater. Interfaces

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“…However, it has one major disadvantage such as low piezoelectric coefficient and relative permittivity at room temperature than the inorganic piezoelectric NSs. Recently, our group and many other research groups successfully overcome the issues of the inorganic and polymer PNGs by developing the composite PNG technology [13][14][15]. The major key factor in designing the efficient, flexible composite PNG device is the development of multifunctional hybrid or composite piezoelectric structures (HPSs).…”

Section: Introductionmentioning

confidence: 99%

“…The chapter describes the cost-effective HPSs (flat, spherical beads, worm structures, micropillars, irregular films, and hemispherical strips) developed by the simple fabrication processes such as solution-casting technique (SCT) [13,14], ionotropic gelation process (IGT) [15], and groove technique (GT) [16]. The digital photographs of the as-fabricated HPSs are shown in Figure 2a.…”

Section: Introductionmentioning

confidence: 99%

Hybrid Structures for Piezoelectric Nanogenerators: Fabrication Methods, Energy Generation, and Self-Powered Applications

Alluri¹,

Chanderashkear²,

Kim³

2018

Energy Harvesting

Self Cite

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Smart energy harvesting through the surrounding environment generates sufficient energy to drive the low-power consumption systems. It is the forthcoming revolution in smart (or self-powered) technology and results in abolishing the usage of complex batteries, external circuit components, and natural sources. To date, extensive fabrication methods, the growth of ZnO nanostructures on plastic substrates, and flexible piezoelectric polymer film-based devices were tested to improve the performance of piezoelectric nanogenerator (PNG) as a prominent energy-harnessing approach for the development of sustainable independent power sources. Still, PNG technology suffers from brittleness, leakage current issues, high electrical output generation, and long-term durability, which can be possible to control by the composite technology, that is, polymer/nanoparticles. The objective of this book chapter determines the rapid growth of multifunctional, flexible composite structures through various methods (e.g., ionotropic gelation method, groove technique, ultrasonication followed by solution-casting methods) for high output energy generation and self-powered sensor/system studies.

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“…This attractive properties make graphene an excellent carrier transporter material in optoelectronic devices, which benefits from both high carrier mobility and optical transparency [4][5][6]. Regarding this, some groups have applied semiconductor-graphene hybrid photodetectors and reported improved performances [7][8][9]. On the other hand, reduced graphene oxide (rGO) can be achieved by simple and low cost synthesis methods, and shows properties similar to graphene sheets.…”

Section: Introductionmentioning

confidence: 99%

“…Also, the coupling of piezoelectric and semiconducting properties in a material like ZnO has led to an emerging field, known as piezophototronic, wherein strain-induced piezopotential is employed for tuning the transport behavior of charge carriers in optoelectronic devices [19,20]. In this line of research, also self-powered photodetectors have been proposed, when scientists showed that photogenerated carriers can modulate the piezopotential [7,[21][22][23].…”

Section: Introductionmentioning

confidence: 99%

Realization of a reduced graphene oxide/ZnO nanorod photodetector, suitable for self-powered applications

2018

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Fabrication of an eco-friendly composite nanogenerator for self-powered photosensor applications

Cited by 46 publications

References 38 publications

Sponge-Templated Macroporous Graphene Network for Piezoelectric ZnO Nanogenerator

Sponge-Templated Macroporous Graphene Network for Piezoelectric ZnO Nanogenerator

Hybrid Structures for Piezoelectric Nanogenerators: Fabrication Methods, Energy Generation, and Self-Powered Applications

Realization of a reduced graphene oxide/ZnO nanorod photodetector, suitable for self-powered applications

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