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Interfacial Flat-Lying Molecular Monolayers for Performance Enhancement in Organic Field-Effect Transistors
Qijing Wang1,2, Sai Jiang1, Longbin Qiu2
1National Laboratory of Solid-State Microstructures School of Electronic Science and Engineering Collaborative Innovation Center of Advanced Microstructures , Nanjing University , Nanjing 210093 , P. R. China.
ACS Applied Materials & Interfaces
|June 9, 2018
Summary
Interface engineering with flat-lying molecular monolayers significantly enhances organic field-effect transistor (OFET) performance. Slow thermal evaporation improves uniformity and crystallinity, boosting carrier mobility and charge transport.
Area of Science:
- Organic electronics
- Materials science
- Semiconductor physics
Background:
- Organic field-effect transistors (OFETs) are foundational in organic electronics.
- Improving charge transport at the semiconductor/dielectric interface is key to enhancing OFET performance.
Purpose of the Study:
- To investigate the impact of flat-lying molecular monolayers on OFET performance.
- To develop a strategy for enhancing charge transport in OFETs through interface engineering.
Main Methods:
- Depositing flat-lying molecular monolayers at the semiconductor/dielectric interface using slow thermal evaporation.
- Fabricating and characterizing OFET devices.
Main Results:
- Achieved high carrier mobility up to 2.80 cm2 V-1 s-1, a significant improvement over fast-evaporated films.
- Demonstrated that interfacial flat-lying monolayers enhance charge transport by suppressing dipole polarization and narrowing trap state broadening.
Conclusions:
- Flat-lying molecular monolayers deposited via slow thermal evaporation offer a promising strategy for superior OFET performance.
- Interface engineering with molecular monolayers is crucial for advancing organic electronic devices.
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