Water permeation pathways in electronic devices should be eliminated for the suppression of operational instabilities. We investigated possible pathways in field-effect transistors based on a laminated single crystal (SC) of an organic semiconductor, rubrene. Water-induced instabilities were found to be more obvious with a thicker rubrene SC. Furthermore, under our simulation conditions, molecular dynamics calculations of water diffusion on a rubrene SC showed that no water molecules penetrated the SC. These findings indicate that a space at the SC/substrate interface is a dominant pathway. The present study clearly shows the importance of conformality of SC lamination onto the underlying substrate.
Cite
@article{arxiv.2106.04943,
title = {Water permeation pathways in laminated organic single-crystal devices},
author = {Ryo Nouchi and Yoshiaki Ishihara and Susumu Ikeda},
journal= {arXiv preprint arXiv:2106.04943},
year = {2021}
}