Related Experiment Video
Updated: Apr 30, 2026
08:29
Morphology Control for Fully Printable Organic–Inorganic Bulk-heterojunction Solar Cells Based on a Ti-alkoxide and Semiconducting Polymer
Published on: January 10, 2017
7.8K
Interface control in organic electronics using mixed monolayers of carboranethiol isomers
Jaemyung Kim1, You Seung Rim, Yongsheng Liu
1California NanoSystems Institute, ‡Department of Materials Science and Engineering, and §Department of Chemistry and Biochemistry, University of California , Los Angeles, Los Angeles, California 90095, United States.
Nano Letters
|April 30, 2014
Summary
We precisely tuned the work function of metals using mixed self-assembled monolayers of carboranethiols. This molecular engineering approach enhances the performance of organic field-effect transistors.
Area of Science:
- Materials Science
- Surface Chemistry
- Nanotechnology
Background:
- Work function modification is crucial for optimizing electronic device performance.
- Self-assembled monolayers (SAMs) offer a versatile route for surface functionalization.
- Carboranethiols present unique molecular structures for tailored surface properties.
Purpose of the Study:
- To systematically alter the work function of gold and silver surfaces.
- To investigate the impact of molecular dipole moments and orientations on work function.
- To establish a platform for fabricating high-performance solution-processed organic field-effect transistors (OFETs).
Main Methods:
- Formation of mixed self-assembled monolayers (SAMs) using carboranethiol isomers on gold and silver substrates.
- Systematic variation of molecular dipole moments and directions by employing different carboranethiol isomers.
- Characterization of surface properties and work function changes.
- Fabrication and testing of organic field-effect transistors (OFETs) utilizing the engineered interfaces.
Main Results:
- Achieved wide-range work function tunability of gold and silver surfaces.
- Demonstrated that varying carboranethiol isomers allows precise control over molecular dipoles and their orientation.
- Observed minimal changes in surface energy despite significant work function alterations.
- Showcased improved device performance in solution-processed organic field-effect transistors through interface engineering.
Conclusions:
- Mixed SAMs of carboranethiols provide an effective strategy for precise work function engineering.
- This method enables the development of tailored metal-organic interfaces for advanced electronic applications.
- Interface engineering using carboranethiol SAMs is a promising approach for enhancing organic field-effect transistor performance.
