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Facile Blending Strategy for Boosting the Conjugated Polymer Semiconductor Transistor's Mobility
Mei-Nung Chen1, Chun-Yao Ke2, Audithya Nyayachavadi3
1Department of Chemical Engineering, National Taiwan University of Science and Technology, No.43, Sec. 4, Keelung Rd, Da'an Dist, Taipei City 10607, Taiwan.
ACS Applied Materials & Interfaces
|October 31, 2023
Summary
Researchers developed a new polymer blend for organic electronics, significantly boosting charge carrier mobility in polymer field-effect transistors (FETs). This advancement enhances performance and stability for practical applications in organic electronics.
Area of Science:
- Organic electronics
- Materials science
- Polymer science
Background:
- Optimizing field-effect mobility in polymer field-effect transistors (FETs) is crucial for organic electronics.
- Understanding polymer design and processing effects on electronic performance remains challenging.
Purpose of the Study:
- To develop a facile solution-processing approach for enhancing hole mobility in polymer FETs.
- To identify the structural and electronic factors contributing to mobility improvements.
Main Methods:
- Solution processing of polymer blends (PDPP-TVT and PTPA-3CN).
- Electrical performance testing of polymer FETs.
- Material characterization using X-ray photoelectron spectroscopy (XPS) and flash differential scanning calorimetry (DSC).
Main Results:
- Achieved a 3.5-fold increase in hole mobility, exceeding 3 cm2 V-1 s-1.
- Demonstrated retained electrical stability for over 20 weeks.
- Identified amorphous D-A conjugated structure and intramolecular polarity of PTPA-3CN as key factors.
- Confirmed uniform distribution and good mixing in binary polymer systems via XPS and DSC.
Conclusions:
- A novel blending strategy significantly enhances mobility and stability in polymer FETs.
- The amorphous D-A conjugated structure and intramolecular polarity of PTPA-3CN are critical for improved performance.
- This approach offers a versatile design strategy for organic transistor systems and holds promise for practical applications of organic field-effect transistors (OFETs).
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