Calculation of polarization and bound charge density inside a dielectric material in triboelectric nanogenerators: Analytical and numerical study

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We analytically calculated polarization and bound charge density inside the dielectric material in metal-to-dielectric-mode triboelectric nanogenerators (TENG) where the transferred charges are collected on the bottom metal via electrostatic induction from the triboelectric charges that are generated by frictional contact. This bound charge density is associated with the surface density of states (DOS), <(N-s(E))over bar>. Two cases are considered here: i) for <(N-s(E))over bar> >> 1, it is calculated that the bound charge density is proportional to the dielectric constant and the work function difference between the two materials, but inversely proportional to the thickness of the dielectric material (epsilon(0)(epsilon(2)-1)(E-0-W)e.d(2); ii) for <(N-s(E))over bar> << 1 with constant <(N-s(E))over bar>, the bound charge density is mostly proportional to the work function difference between the materials, and inversely proportional to the thickness of the dielectric material ((epsilon(2)-1)x/d(2)+epsilon(2).x . N-s(E) . e . (E-0-W)).
Publisher
SPRINGER HEIDELBERG
Issue Date
2016-11
Language
English
Article Type
Article
Keywords

CONTACT ELECTRIFICATION

Citation

EUROPEAN PHYSICAL JOURNAL PLUS, v.131, no.11

ISSN
2190-5444
DOI
10.1140/epjp/i2016-16382-1
URI
http://hdl.handle.net/10203/224570
Appears in Collection
CH-Journal Papers(저널논문)
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