Search research articles

ABOUT JoVE

Overview Leadership Blog JoVE Help Center

AUTHORS

Publishing Process Editorial Board Scope & Policies Peer Review FAQ Submit

LIBRARIANS

Testimonials Subscriptions Access Resources Library Advisory Board FAQ

RESEARCH

JoVE Journal Methods Collections JoVE Encyclopedia of Experiments Archive

EDUCATION

JoVE Core JoVE Business JoVE Science Education JoVE Lab Manual Faculty Resource Center Faculty Site

Terms & Conditions of Use

Related Concept Videos

Susceptibility, Permittivity and Dielectric Constant

Susceptibility, Permittivity and Dielectric Constant

When placed in an external electric field, a dielectric material gets polarized. The charge density in the dielectric material is given by the sum of the bound and free charge densities, while the total charge density can also be written in terms of the total electric field. The bound charge density can be measured in terms of polarization, leading to the relationship between electric displacement and polarization.

Dielectric Polarization in a Capacitor

Dielectric Polarization in a Capacitor

The presence of a dielectric medium in a capacitor not only changes the voltage and capacitance but also affects the electric field. In general, dielectrics can be of two types: polar and nonpolar. In a polar dielectric, the positive and negative charges in the molecules are separated by a distance and hence have a permanent dipole moment. In contrast, no such charge separation exists in a nonpolar dielectric, however the nonpolar molecules get polarized in the presence of an external electric...

Electrostatic Boundary Conditions in Dielectrics

Electrostatic Boundary Conditions in Dielectrics

When an electric field passes from one homogeneous medium to another, crossing the boundary between the two mediums imparts a discontinuity in the electric field. This results in electrostatic boundary conditions that depend on the type of mediums the field propagates through.
Consider a case where both the mediums across a boundary are two different dielectric materials. Recall that the electric field and electric displacement are proportional and related through the material's permittivity.

Interfacial Electrochemical Methods: Overview

Interfacial Electrochemical Methods: Overview

Interfacial electrochemical methods focus on the phenomena occurring at the boundary between an electrode and a solution, as opposed to bulk methods that concentrate on the solution's overall properties. These interfacial methods are classified as either static or dynamic based on the presence of a nonzero current in the electrochemical cell and the consistency of analyte concentrations. Static methods, such as potentiometry, measure the cell's potential without any significant current passing...

Capacitor With A Dielectric

Capacitor With A Dielectric

Parallel plate capacitors consist of two conducting plates separated by a certain distance. However, it is mechanically difficult to hold the large plates parallel to each other without actual contact. Hence, a dielectric layer is commonly placed between the plates, which provides an easy solution for holding the plates together with a small gap and increases the capacitance of the capacitor.
Dielectrics are non-conducting materials with no free or loosely bound electrons. When a dielectric is...

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by

Same author

Spatial associations for slow musical tempos are revealed by increased stimulus density.

Scientific reports·2026

Same author

Reply to: On the interpretation of astrocytic calcium signalling with graphene oxide electrodes.

Nature nanotechnology·2026

Same author

Ace in the hole: playing cards show the role of order and magnitude in the SNARC effect.

Psychological research·2026

Same author

Explicit and implicit spatial mapping of face age.

Psychological research·2026

Same author

Number magnitude affects spatial decisions: Evidence of spatial-numerical associations with complex movements.

Cognition·2026

Same author

Pregnancy and childbirth in women with thalassemia: past and present.

Haematologica·2025

Search research articles

Related Experiment Video

Updated: Jul 3, 2026

Concurrent Quantitative Conductivity and Mechanical Properties Measurements of Organic Photovoltaic Materials using AFM

Concurrent Quantitative Conductivity and Mechanical Properties Measurements of Organic Photovoltaic Materials using AFM

Published on: January 23, 2013

Correlation between dielectric/organic interface properties and key electrical parameters in PPV-based OFETs.

Francesco Todescato¹, Raffaella Capelli, Franco Dinelli

¹Consiglio Nazionale delle Ricerche (CNR), Istituto per lo Studio dei Materiali Nanostrutturati (ISMN), via P. Gobetti 101, I-40129 Bologna, Italy. f.todescato@bo.ismn.cnr.it

The Journal of Physical Chemistry. B

|July 30, 2008

Summary

Optimizing dielectric/organic interfaces significantly enhances field-effect transistor performance. Surface treatments that eliminate OH groups boost hole mobility and reduce hysteresis in polyphenylenevinylene (PPV) transistors.

More Related Videos

Production and Characterization of Vacuum Deposited Organic Light Emitting Diodes

Production and Characterization of Vacuum Deposited Organic Light Emitting Diodes

Published on: November 16, 2018

Related Experiment Videos

Last Updated: Jul 3, 2026

Concurrent Quantitative Conductivity and Mechanical Properties Measurements of Organic Photovoltaic Materials using AFM

Concurrent Quantitative Conductivity and Mechanical Properties Measurements of Organic Photovoltaic Materials using AFM

Published on: January 23, 2013

Production and Characterization of Vacuum Deposited Organic Light Emitting Diodes

Production and Characterization of Vacuum Deposited Organic Light Emitting Diodes

Published on: November 16, 2018

Area of Science:

Organic electronics
Materials science
Semiconductor physics

Background:

Field-effect transistors (FETs) are crucial electronic components.
Polyphenylenevinylene (PPV) derivatives are promising organic semiconductors.
Dielectric-semiconductor interface properties critically influence FET performance.

Purpose of the Study:

To investigate the impact of dielectric surface treatments on PPV-based FET electrical characteristics.
To establish correlations between interface properties and device performance parameters.
To identify optimal surface modifications for improved FET behavior.

Main Methods:

Systematic investigation of common dielectric surface treatments (e.g., silane treatments, polymer layers).
Electrical characterization of PPV-based FETs, measuring charge carrier mobility, On/Off ratio, threshold voltage, and hysteresis.
Analysis of dielectric surface properties, focusing on OH group density and molecular interactions.

Main Results:

Presence of OH groups on dielectric surfaces decreases hole mobility.
Octadecyltrichlorosilane (OTS) and hexamethyldisilazane (HMDS) treatments improve hole mobility and reduce current hysteresis.
Eliminating OH groups via polymer dielectrics yields performance comparable to HMDS treatment.
Achieved highest reported hole mobility values for PPV-based FETs using HMDS and polymer dielectrics.

Conclusions:

Dielectric surface properties, particularly OH group density and interfacial interactions, profoundly affect PPV-based FET performance.
Specific surface treatments like HMDS and polymer dielectrics are highly effective in enhancing charge carrier mobility and device stability.
This study provides a pathway for designing high-performance organic field-effect transistors.