Issue 1, 2024

Triboelectric junction: a model for dynamic metal–semiconductor contacts

Abstract

Static metal–semiconductor contacts are classified into Ohmic contacts and Schottky contacts. As for dynamic metal–semiconductor contacts, the in-depth mechanism remains to be studied. We here define a “triboelectric junction” model for analyzing dynamic metal–semiconductor contacts, where a space charge region induced by the triboelectric effect dominates the electron–hole separation process. Through theoretical analysis and experiments, we conclude that the triboelectric junction influences the electric output in two aspects: (1) the junction direction determines the output polarity; (2) the junction strength determines the output magnitude. Both the junction direction and junction strength are closely related to the electron-affinity difference between the contact metal and semiconductor.

Graphical abstract: Triboelectric junction: a model for dynamic metal–semiconductor contacts

Supplementary files

Article information

Article type
Paper
Submitted
29 ago 2023
Accepted
07 nov 2023
First published
15 nov 2023

Energy Environ. Sci., 2024,17, 149-157

Triboelectric junction: a model for dynamic metal–semiconductor contacts

X. Xu, Z. L. Wang and Z. Yang, Energy Environ. Sci., 2024, 17, 149 DOI: 10.1039/D3EE02870D

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