Amplifying the dielectric constant of shellac by incorporating natural clays for organic field effect transistors (OFETs)

Authors

SUNWOO KIM
CIGDEM YUMUSAK
CRISTIAN-VLAD IRIMIA
MATEUSZ BEDNORZ
ESMA YENEL
MAHMUT KUŞ
NİYAZİ SERDAR SARIÇİFTÇİ
BONG SUP SHIM
MIHAI IRIMIA

DOI

10.55730/1300-0527.3603

Abstract

We demonstrate in this work the practical use of uniform mixtures of a bioresin shellac and four natural clays, i.e. montmorillonite, sepiolite, halloysite and vermiculate as dielectrics in organic field effect transistors (OFETs). We present a thorough characterization of their processability and film forming characteristic, surface characterization, elaborate dielectric investigation and the fabrication of field effect transistors with two classic organic semiconductors, i.e. pentacene and fullerene C60. We show that low operating voltage of approximately 4 V is possible for all the OFETs using several combinations of clays and shellac. The capacitance measurements show an improvement of the dielectric constant of shellac by a factor of 2, to values in excess of 7 in the uniform mixtures of sepiolite and montmorillonite with this bioresin.

Keywords

Shellac, natural clays, shellac-clays composite, natural dielectric

First Page

1169

Last Page

1182

Recommended Citation

KIM, SUNWOO; YUMUSAK, CIGDEM; IRIMIA, CRISTIAN-VLAD; BEDNORZ, MATEUSZ; YENEL, ESMA; KUŞ, MAHMUT; SARIÇİFTÇİ, NİYAZİ SERDAR; SHIM, BONG SUP; and IRIMIA, MIHAI (2023) "Amplifying the dielectric constant of shellac by incorporating natural clays for organic field effect transistors (OFETs)," Turkish Journal of Chemistry: Vol. 47: No. 5, Article 23. https://doi.org/10.55730/1300-0527.3603
Available at: https://journals.tubitak.gov.tr/chem/vol47/iss5/23