Charge transfer dynamics in contact electrification of dielectrics investigated by triboluminescence

Li, Na; Ma, Liran; Xu, Xuefeng; Luo, Jianbin

doi:10.1016/j.jlumin.2020.117531

Cited by 8 publications

(4 citation statements)

References 48 publications

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“…These free electrons on the surfaces may play a crucial role in a wide range of physical processes, such as the electron transfer during the contact electrification between insulators. [6][7][8][9][10][11][12][51][52][53] The reason for using comparison between the UPS and XPS as a calibration is because that direct measurements on the potential of the irradiated surfaces is not easy and it is also difficult to find proper peaks in the UPS spectra that can be used for BE referencing. However, we should keep in mind that the energy resolution of XPS measurement on valence-band is limited and thus the accuracy of the derived energy shift may be not so satisfactory.…”

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

“…[ 3–5 ] The electronic band structure, especially the valence‐band structure, has a significant impact on the physical properties of solids. For example, the valence‐band structure may determine the direction and the magnitude of the charge transfer in the contact electrification (CE), [ 6–8 ] and thus influence the performance of the triboelectric nanogenerators (TENG). [ 9–12 ] At present, the regulation and control of the valence‐band structure has become an effective method for the development of novel materials, [ 13–15 ] and consequently, a credible measurement of the valence‐band structure not only for conductors but also for dielectric materials is becoming more and more crucial.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Observations on Valence‐Band Electronic Structure and Surface States of Bulk Insulators Based on Fast Stabilization Process of Sample Charging in UPS

Zhu,

Li,

et al. 2024

Laser & Photonics Reviews

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The valence‐band electronic structure is one of the most basic properties of materials and ultraviolet photoelectron spectroscopy (UPS) is the most commonly used technique for its measurement. To obtain credible UPS spectra on insulator surfaces, eliminating the charging effects at the surfaces is essential but is very difficult. Here, a reliable measurement for the valence‐band structure of bulk insulators is shown. It has been observed that, during UPS measurements without any charge compensation, the charging on irradiated insulator surfaces reaches its steady state very quickly and the fluctuation of the charging‐induced surface potential is very small. Therefore, the whole UPS spectrum undergoes just a parallel shift and can be calibrated by comparison with the corresponding X‐ray photoelectron spectroscopy (XPS) spectrum even though XPS often has a poorer resolution than UPS. From the calibrated valence‐band spectra, it is found that noticeable electronic energy levels (i.e., the “surface states”) exist in the bandgap, and based on the density of states (DOS) calculations, the surface states are attributed to the truncation of the bulk periodic structure at the surfaces. This work is anticipated to provide a way to obtain the valence band structure and the surface states of bulk insulators which play crucial roles in many physical processes.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Observations on Valence‐Band Electronic Structure and Surface States of Bulk Insulators Based on Fast Stabilization Process of Sample Charging in UPS

Zhu,

Li,

et al. 2024

Laser & Photonics Reviews

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“…Other methods are the encapsulation of a lubricant in droplets or lamella structures. 7,[52][53][54] The improved electrical conductivity in combination with reduced COFs, especially in self-lubricating systems, could enable a future application in electrically encumbered bearings. Typical drawbacks in such applications are breakdown voltages for bearings with low electrical conductivity which damages the bearings.…”

Section: Introductionmentioning

confidence: 99%

Tribological performance of electrically conductive and self-lubricating polypropylene–ionic-liquid composites

Gatti

Amann

et al. 2023

RSC Adv.

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Complete contact trajectory visualization based on triboelectrification and droplet luminescence

Song

Zhu

et al. 2021

Applied Materials Today

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Charge transfer dynamics in contact electrification of dielectrics investigated by triboluminescence

Cited by 8 publications

References 48 publications

Observations on Valence‐Band Electronic Structure and Surface States of Bulk Insulators Based on Fast Stabilization Process of Sample Charging in UPS

Observations on Valence‐Band Electronic Structure and Surface States of Bulk Insulators Based on Fast Stabilization Process of Sample Charging in UPS

Tribological performance of electrically conductive and self-lubricating polypropylene–ionic-liquid composites

Complete contact trajectory visualization based on triboelectrification and droplet luminescence

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