# Natural, small molecule aliphatics (cholesterol and hexadecyl palmitate) as dielectrics for low-voltage organic field effect transistors

## TL;DR

This paper shows that cholesterol and hexadecyl palmitate can be used as low-voltage dielectrics in organic transistors, supporting sustainable electronics.

## Contribution

The novel use of cholesterol and hexadecyl palmitate as low-voltage dielectrics in OFETs is introduced.

## Key findings

- Cholesterol and hexadecyl palmitate function as effective dielectrics in OFETs.
- OFETs using these materials operate at voltages as low as 1 V and 10 mV.
- Blade coating technique enables fabrication with chloroform-solubilized materials.

## Abstract

In this study, we show that hexadecyl palmitate and cholesterol, two naturally occurring small molecule aliphatics, are suitable dielectrics for organic field effect transistors (OFETs). We provide a comprehensive description of their material characteristics, processability, and film-forming capabilities, as well as surface characterization and dielectric analysis. We finally employ them for the fabrication of organic field effect transistors, employing two traditional organic semiconductors, pentacene and fullerene, C60. We demonstrate that most OFETs can function with operating voltage windows as low as 1 V, and driving voltages as low as 10 mV, when these materials solubilized in chloroform, are fabricated utilizing blade coating technique.

Two, naturally occurring small molecules, cholesterol and hexadecyl palmitate are demonstrated to be excellent dielectric materials for organic field effect transistors operating at low voltage in the frame of sustainable electronics development.