Investigation of Dielectric Anisotropy and Electrical Modulus-Impedance Properties of PCBM/E7 Composite for Organic Electronic Devices Applications

Year 2025, Volume: 21 Issue: 2, 72 - 79, 27.06.2025

Ahmet Demir , Ahmad Badreddin Musatat , Şule Zeynep Kip

https://doi.org/10.18466/cbayarfbe.1562667

Cited By: 1

Abstract

This study investigates the dielectric anisotropy and electrical modulus-impedance properties of a PCBM/E7 composite material for organic electronic devices applications. The research examines a specially fabricated cell combining nematic liquid crystal E7 with [6,6]-phenyl-C61-butyric acid methyl ester (PCBM) semiconductor. Through a comprehensive analysis of dielectric anisotropy, AC conductivity, electrical modulus, and impedance characteristics under varying frequencies and applied voltages (-6.0V to +6.0V), the study reveals distinct behavioral regions and multiple relaxation processes. Key findings include frequency-dependent dielectric anisotropy transitions, enhanced AC conductivity at higher frequencies and voltages, and voltage-modulated impedance characteristics. The observed dual-peak phase angle response suggests multiple relaxation mechanisms, indicating the composite's potential for voltage-tunable electrical properties in advanced optoelectronic applications.

Keywords

AC conductivity , dielectric anisotropy , electrical modulus , impedance spectroscopy , liquid crystal , E7-PCBM composite

Ethical Statement

There are no ethical issues after the publication of this manuscript.

Supporting Institution

Düzce University

Project Number

2021.05.02.1236

Thanks

We acknowledge the vital support from Düzce University and Sakarya University, including their facilities, resources, and academic environment. We thank the faculty and staff for their expertise and assistance. This research was funded by Düzce University Scientific Research Project (Project number: 2021.05.02.1236).

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