Electron blocking layer-based interfacial design for highly-enhanced triboelectric nanogenerators

Park, Hyun-Woo; Huynh, Nghia Dinh; Kim, Wook; Lee, Choongyeop; Nam, Youngsuk; Lee, Sang‐Min; Chung, Kwun Bum; Choi, Dukhyun

doi:10.1016/j.nanoen.2018.05.024

Cited by 114 publications

(66 citation statements)

References 23 publications

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“…Figure 3 d shows the corresponding results for the triboelectric potential distributions of pristine TENGs and TiO 2−x NPs-embedded TENG, respectively. The details of the COMSOL Multiphysics simulation parameters and equations are provided in our previous study, Reference [ 16 ]. As a result, the COMSOL simulations showed that the 5% TiO 2−x NPs-embedded TENG can exhibit higher performance than the pristine TENG.…”

Section: Resultsmentioning

confidence: 99%

Effects of Embedded TiO2−x Nanoparticles on Triboelectric Nanogenerator Performance

et al. 2018

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Triboelectric nanogenerators (TENGs) are used as self-power sources for various types of devices by converting external waves, wind, or other mechanical energies into electric power. However, obtaining a high-output performance is still of major concern for many applications. In this study, to enhance the output performance of polydimethylsiloxane (PDMS)-based TENGs, highly dielectric TiO2−x nanoparticles (NPs) were embedded as a function of weight ratio. TiO2−x NPs embedded in PDMS at 5% showed the highest output voltage and current. The improved output performance at 5% is strongly related to the change of oxygen vacancies on the PDMS surface, as well as the increased dielectric constant. Specifically, oxygen vacancies in the oxide nanoparticles are electrically positive charges, which is an important factor that can contribute to the exchange and trapping of electrons when driving a TENG. However, in TiO2−x NPs containing over 5%, the output performance was significantly degraded because of the increased leakage characteristics of the PDMS layer due to TiO2−x NPs aggregation, which formed an electron path.

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Section: Resultsmentioning

confidence: 99%

Effects of Embedded TiO2−x Nanoparticles on Triboelectric Nanogenerator Performance

et al. 2018

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“…Therefore, the variation of the instantaneous power densities of the IPS10‐based TENG device corresponding to the change of external loads under different applied forces was investigated (see Figure S10 in the Supporting Information). Beyond this, we conducted a comparative study of the density of the power generated by the TENG device developed in this study with other PDMS‐based TENGs from selected previous reports (Figure b) 5b,7e,16b,21. It is obviously demonstrated that the newly developed TENG device possesses much higher power density than those of all other selected PDMS‐based TENGs for a wide range of applied forces.…”

Section: Resultsmentioning

confidence: 82%

Treefrog Toe Pad‐Inspired Micropatterning for High‐Power Triboelectric Nanogenerator

Bui

Zhou

Kim

et al. 2019

Adv Funct Materials

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Inspired by treefrog's toe pads that show superior frictional properties, herein, an industrially compatible approach is reported to make an efficient dielectric tribosurface design using customizable nonclosepacked microbead arrays, mimicking the friction pads of treefrogs, in order to significantly enhance electrification performance and reliability of triboelectric nanogenerator (TENG). The approach involves using an engineering polymer to prepare a highly ordered large-area concave film, and subsequently the molding of a convex patterned triboreplica in which the concave film is exploited as a reusable master mold. A natureinspired TENG based on the patterned polydimethylsiloxane (PDMS) paired with flat aluminum (Al) can generate a relatively high power density of 8.1 W m −2 even if a very small force of ≈6.5 N is applied. Moreover, the convex patterned PDMS-based TENG possesses exceptional durability and reliability over 25 000 cycles of contact-separation. Considering the significant improvements in power generation of TENG; particularly at very small force, together with cost-effectiveness and possibility of mass production, the present methodology may pave the way for large-scale blue energy harvesting and commercialization of TENGs for many practical applications.

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“…Various metal oxide thin films have been reported to block the charge combination due to their high permittivity, a large number of oxygen vacancies, and the high interface density of states. Adding a titanium oxide (TiO X ) layer maintained the high surface charge density by suppressing the charge combination; thus, a significant enhancement in TENG performance was obtained 66 . A TENG with an indium zinc oxide (IZO) interlayer was also reported to provide a large interface density of states and to function as a charge reservoir 67 .…”

Section: Charge-trapping Layermentioning

confidence: 99%

Material aspects of triboelectric energy generation and sensors

et al. 2020

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The triboelectric nanogenerator (TENG) is a new type of energy generator first demonstrated in 2012. TENGs have shown potential as power sources for electronic devices and as sensors for detecting mechanical and chemical stimuli. To date, studies on TENGs have focused primarily on optimizing the systems and circuit designs or exploring possible applications. Even though triboelectricity is highly related to the material properties, studies on materials and material designs have been relatively less investigated. This review article introduces recent progress in TENGs, by focusing on materials and material designs to improve the electrical output and sensing performance. This article discusses the current technological issues and the future challenges in materials for TENG.

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Electron blocking layer-based interfacial design for highly-enhanced triboelectric nanogenerators

Cited by 114 publications

References 23 publications

Effects of Embedded TiO2−x Nanoparticles on Triboelectric Nanogenerator Performance

Effects of Embedded TiO2−x Nanoparticles on Triboelectric Nanogenerator Performance

Treefrog Toe Pad‐Inspired Micropatterning for High‐Power Triboelectric Nanogenerator

Material aspects of triboelectric energy generation and sensors

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