Large-scalable RTCVD Graphene/PEDOT:PSS hybrid conductive film for application in transparent and flexible thermoelectric nanogenerators

Park, Chan-Il; Yoo, Dohyuk; Im, Soeun; Kim, Soyeon; Cho, Wonseok; Ryu, Je-Kwang

doi:10.1039/c7ra02980b

Cited by 53 publications

(43 citation statements)

References 40 publications

(28 reference statements)

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“…Most inorganic TE materials generally have the properties of brittleness, breakability, and high requirements for the preparation process, but they are still widely used by researchers due to relatively excellent TE properties. In recent years, 2D layered TE materials have gradually become burgeoning and popular, such as Te, graphene, TiS 2 , WS 2 nanomaterials, and other 2D nanomaterials with excellent photoelectric or thermoelectric performances. Compared with inorganic materials, some organic materials have not only superior electrical conductivity, but also excellent TE properties, such as PEDOT and its composites .…”

Section: Summary and Prospectsmentioning

confidence: 99%

Design, Performance, and Application of Thermoelectric Nanogenerators

Zhang

Wang

Yang

2019

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Thermal energy harvesting from the ambient environment through thermoelectric nanogenerators (TEGs) is an ideal way to realize self‐powered operation of electronics, and even relieve the energy crisis and environmental degradation. As one of the most significant energy‐related technologies, TEGs have exhibited excellent thermoelectric performance and played an increasingly important role in harvesting and converting heat into electric energy, gradually becoming one of the hot research fields. Here, the development of TEGs including materials optimization, structural designs, and potential applications, even the opportunities, challenges, and the future development direction, is analyzed and summarized. Materials optimization and structural designs of flexibility for potential applications in wearable electronics are systematically discussed. With the development of flexible and wearable electronic equipment, flexible TEGs show increasingly great application prospects in artificial intelligence, self‐powered sensing systems, and other fields in the future.

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Section: Summary and Prospectsmentioning

confidence: 99%

Design, Performance, and Application of Thermoelectric Nanogenerators

Zhang

Wang

Yang

2019

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“…The addition of GO to PEDOT:PSS contributes to the enhanced electrical conductivity of PEDOT:PSS. Functional groups such as ‐OH and ‐COOH on GO in combination with the π–π stacking interaction between the PEDOT chains and GO weaken the coulombic attraction between the positively charged conductive PEDOT chains and the negatively charged non‐conductive PSS chains . The weakened coulombic attraction between the conductive PEDOT and non‐conductive PSS chains induces the conformational change in the PEDOT chains, aligning across the GO sheets, as shown in Figure a; this change was also confirmed by the peak shift in the Raman spectra shown in Figure b from 1434 cm −1 for PEDOT:PSS to 1431 cm −1 for PEDOT:PSS with 5 wt% GO .…”

Section: Resultsmentioning

confidence: 67%

Sliding Interconnection for Flexible Electronics with a Solution‐Processed Diffusion Barrier against a Corrosive Liquid Metal

Shin

Baek

Song

et al. 2019

Adv Elect Materials

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The epoch of flexible electronics demands new measures to interconnect electronic components and circuits under mechanical deformations such as bending, rolling, folding, and even stretching. Although liquid metal has been proposed as an alternative to solid‐state solder alloys and conductive adhesives, its corrosive nature rapidly deteriorates the electrical and structural integrity of metallic interconnects and has remained an arduous challenge. A facile solution‐processable method to construct a flexible and electrically conductive diffusion barrier on aluminum electrodes, which are vulnerable to liquid metal, is presented. The stacked layers of graphene oxide (GO) in conjunction with poly(3,4‐ethylenedioxythiophene) polystyrene sulfonate (PEDOT:PSS) effectively block the diffusion of liquid metal, where PEDOT:PSS serves as an electrically conducting medium to complement the non‐conductive trait of GO, and as an impeding factor together with GO against the diffusion of liquid metal. A fluidic interconnect using liquid metal and aluminum electrodes with the solution‐processed diffusion barrier of the PEDOT:PSS/GO composite exhibits a better electrical contact property than a conventional interconnect. Finally, a novel proof of concept of sliding interconnection is demonstrated by rolling a carbon nanofiber‐coated liquid metal ball on aluminum electrodes coated with the PEDOT:PSS/GO composite, offering a new opportunity beyond flexibility and stretchability.

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“…Materials Advances obtained with lower thermal conductivity. 149 More interestingly, the PEDOT:PSS thin film reduced the surface defects and improved the bending stability of the film. Due to the constrained distortion of graphene during the bending stress, the thermoelectric performance remained stable after 1000 cycles.…”

Section: Reviewmentioning

confidence: 97%