Spray-coated electret materials with enhanced stability in a harsh environment for an MEMS energy harvesting device.

ABSTRACT: The charge stability of electret materials can directly affect the performance of electret-based devices such as electrostatic energy harvesters. In this paper, a spray-coating method is developed to deposit an electret layer with enhanced charge stability. The long-term stability of a spray-coated electret is investigated for 500 days and shows more stable performance than a spin-coated layer. A second-order linear model that includes both the surface charge and space charge is proposed to analyze the charge decay process of electrets in harsh environments at a high temperature (120 °C) and high humidity (99% RH); this model provides better accuracy than the traditional deep-trap model. To further verify the stability of the spray-coated electret, an electrostatic energy harvester is desi

SUBMITTER: Luo A 

PROVIDER: S-EPMC8433343 | biostudies-literature | 2021

REPOSITORIES: biostudies-literature